UT69R00012FCAH - Aeroflex, Inc.

Standard Products

UT69R000 RadHard MicroController

Data Sheet

July 2002

qHarvard architecture

-64K data space

-1M instruction space

qHigh throughput engine

- 2 clocks per instruction

- 8 MIPS @ 16 MHz

- Static design

q15 levels of interrupts

- 8 external user defined interrupts

- Machine error and power fail

qTwo on-board 16-bit interval timers

- Timer A, 10 µs/bit

- Timer B, 100 µs/bit resolution

q8-bit software controlled output discrete bus

qRegister- oriented architecture has 21

user-accessible registers

- 16-bit or 32-bit register configurations

qSupports direct memory access (DMA) system

configuration

qBuilt-in 9600 baud UART

qFull military operating temperature range, -55oC to

+125oC, in accordance with MIL-PRF-38535 for Class Q

or V

qTypical radiation performance:

- Total dose: 1.0E6 rads(Si)

- SEL Immune >100 MeV-cm2/mg

- LETTH(0.25) = 60 MeV-cm2/mg

- Saturated Cross Section (cm2) per bit, 1.2E-7

- 2.3E-11 errors/bit-day, Adams to 90%

geosynchronous heavy ion

qPost-radiation AC/DC performance characteristics

guaranteed by MIL-STD-883 Method 1019 testing

at 1.0E6 rads(Si)

qLatchup immune 1.5-micron CMOS, epitaxial,

double-level-metal technology

qPackaging options:

- 132-lead flatpack

- 144-pin pingrid array (plus one index pin)

Figure 1. UT69R000 Functional Block Diagram

BRQ

BGNT

BUSY

BGACK

NUI1

NUI2

NUI3

STATE1

DI1

DI2

INSTRUCTION

DATA

INSTRUCTION

ADDRESS

MCHNE1

BTERR

MCHNE2

MPROT

PFAIL

INT5

INT6

INT0-4

MRST

ADD

MUX

MEMORY

CONTROL

BUS

ARBITRA-

TION

PROCES-

SOR

STATUS

PROCESSOR

CONTROL

LOGIC

OSCILLATOR

/CLOCK

GENERAL

PURPOSE

REGISTERS

OSCIN OSCOUT

SYSCLK

IC/ICs ACC

SHIFT REG

TEMP DEST

TEMP SRC

BIT REG 32

A MUX B MUX

32-BIT ALU 16

ADDR

MUX

BUS

CONTROL

UART

TBR

RBR

TIMCLK

TEST

UARTOUT

UARTIN

8OD(7:0)

OPERAND

DATA

DTACK

M/IO

R/ WR

OPERAND

ADDRESS

PIPELINE

I/O

MUX

INTER-

RUPTS

Table of Contents

1.0 Introduction.....................................................................................................................4

1.1 General Description ..............................................................................................4

1.2 General Operation.................................................................................................4

2.0 Register File ....................................................................................................................6

2.1 General Purpose Registers ....................................................................................6

2.2 Specialized Registers ............................................................................................6

2.2.1 Specialized Register Description.................................................................6

3.0 Instruction Port..............................................................................................................16

3.1 Instruction Port Operations.................................................................................17

3.1.1 STRI Instruction Bus Cycle.......................................................................17

3.1.2 LRI Instruction Bus Cycle .........................................................................18

4.0 Operand Port .................................................................................................................19

4.1 Operand Bus Cycle Operation ............................................................................20

4.2 DMA Operation and Bus Arbitration..................................................................23

5.0 Discrete Input/Output....................................................................................................25

5.1 Output Discrete Bus............................................................................................25

5.2 Discrete Inputs ....................................................................................................26

6.0 Interrupts .......................................................................................................................26

6.1 Interrupt Control .................................................................................................26

6.1.1 Interrupt Status...........................................................................................27

6.1.2 Interrupt Processing and Vectoring ...........................................................27

6.2 Interrupt Sources.................................................................................................28

6.3 Interrupt Hardware..............................................................................................28

6.4 Interrupt Latency.................................................................................................28

7.0 Monitor .........................................................................................................................28

7.1 Using the Monitor...............................................................................................29

7.1.1 Examine Command....................................................................................33

7.1.2 Modify Command......................................................................................33

7.1.3 Continue Command...................................................................................34

7.1.4 Run Command...........................................................................................34

8.0 Internal UART Operation .............................................................................................34

8.1 UART Transmitter Operation.............................................................................34

8.2 UART Receiver Operation..................................................................................35

9.0 Programming Interface..................................................................................................35

9.1 Data Formats.......................................................................................................35

9.2 Instruction Formats.............................................................................................36

9.3 Addressing Modes...............................................................................................37

9.4 Data Movement Operations ................................................................................38

10.0 Pin Description..............................................................................................................39

11.0 Absolute Maximum.......................................................................................................46

12.0 Recommended Operating Conditions...........................................................................46

13.0 DC Electrical Characteristics........................................................................................47

14.0 AC Electrical Characteristics........................................................................................48

15.0 Packaging......................................................................................................................58

16.0 Ordering ........................................................................................................................60

DTACK

BGACK

BUSY

BGNT

BRQ

MCHNE1

MRST

INT6

INT5

PFAIL

INT0

INT1

INT2

INT3

INT4

NUI4

TEST

EXCEPTIONS

INTERRUPTS/

INSTRUCTION DATA PORT

OSCIN

OSCOUT

UARTIN

UARTOUT

TIMCLK

UT69R000

RA19

RA18

RA17

RA16

RA15

RA14

RA13

RA12

RA11

RA10

RA9

RA8

RA7

RA6

RA5

RA4

RA3

RA2

RA1

RA0

NUI1

NUI3

BTERR

MCHNE2

MPROT

A10

A11

A12

A13

A14

A15

OD7

OD6

OD5

OD4

OD3

OD2

OD1

SYSCLK

INSTRUCTION

ADDRESS

BUS

PROCESSOR

STATUS

OSCILLATOR

UART

DATA BUS

MEMORY

ADDRESS

BUS

CLOCK

OUTPUT

BUS

CONTROL

BUS

ARBITRATION

OD0

Figure 2. UT69R000 Pin Function Diagram

DI1

DI2

STATE1

RD0 - RD15

D0 - D15

OPERAND

NUI2

DISCRETES

1.0 Introduction

The UT69R000 is a radiation-hardened high-performance

microcontroller designed, manufactured, and tested to meet

rigorous radiation environments. UTMC designed and

implemented the UT69R000 using an advanced radiation-

hardened twin-well CMOS process. The combination of

radiation-hardness, high throughput, and low power

consumption makes the UT69R000 ideal for high-speed

systems in satellites, missiles, and avionics applications.

1.1 General Description

The UT69R000 is a versatile microcontroller designed to meet

real-time control type applications. Support functions often

found external to a microprocessor are integrated within the

microcontroller. Functions include UART, interval timers, 10

external interrupt vectors, and a 8-bit output discrete bus.

The UT69R000 core (machine) is a two port microcontroller

that accesses instructions from a 1M x 16 instruction port; a

second port (64K x 16 data port) is available for data storage.

Data transfer acknowledge allows the addition of wait states

on the data port. The machine performs overlapping fetches

and executes speeding instruction throughput. A 12 MHz

operating clock frequency provides up to 6 MIPS of

throughput. A later section of this data sheet expands on this

concept.

The UT69R000 architecture is based on 20 16-bit general

purpose registers providing, the programmer with extensive

the concatenation of 16-bit registers into 32-bit registers. In

addition, all registers are available for use as either the source

or destination for any register operation.

All UT69R000 circuitry is of static design. Internal registers,

counters, and latches do not require refresh as with dynamic

circuit design. Therefore the UT69R000 can operate from DC

to the upper frequency limit of 16 MHz. This type of operation

is especially useful in power critical applications such as

satellites.

The UT69R000 fully supports multiprocessor systems, DMA,

and complex bus arbitration. Bus control passes among bus

masters operating on the same bus. The bus master can be one

of several UT69R000s or any other device requiring DMA.

The UT69R000 supports 15 levels of vectored interrupts. Ten

of these are external interrupts, all of which are user-definable.

All interrupts are serviced in order of priority.

The UT69R000’s three basic instruction formats support 16-

bit and 32-bit instruction. The formats are Register-to-Register,

instructions.

Figure 3 shows the UT69R000’s general system architecture.

1.2 General Operation

The UT69R000 reduced instruction set consists of 35 separate

instructions. Most of these instructions execute in two clock

cycles providing high-throughput. The UT69R000 has a

Harvard architecture which incorporates two address and two

data buses. One set of address and data buses interface with

instruction memory (instruction port) and the other interfaces

with data memory (data port). The instruction port consists of

a 20-bit address bus and 16-bit data bus. The maximum

program length of any program is 1 mega-word. The data port

consists of a 16-bit address and data bus, allowing access to

64K x 16 of data storage.

The instruction port is dedicated to the storage of instruction

code; however , two instructions exist that allow the instruction

port manipulation by the machine. These instructions are the

Load Register from Instruction Memory (LRI) and Store

20 16

ADDRESS

Figure 3. UT69R000 General System Architecture

CONTROL

DATA

MEMORY

INSTRUCTION

UT69R000 DATA

MEMORY

DATA

ADDRESS

The UT69R000 begins operation by first generating an address

on the instruction port; valid data (instruction) is then latched

into the Primary Instruction Register (PIR). After the machine

stores the instruction in the PIR, the machine begins execution

of the instruction in the Instruction Register (IR). If the present

instruction in the IR requires only internal processing, the

machine does not exercise the data bus. If the machine needs

additional data to complete the instruction the machine begins

arbitration for the data port.

Data port arbitration begins with the machine asserting the Bus

Request (BRQ) signal. The machine samples the Bus Grant

(BGNT) and Bus Busy (BUSY) signals on the falling edge of

the clock (OSCIN). When the machine detects that the previous

bus controller has relinquished control of the bus, the machine

generates a Bus Grant Acknowledge (BGACK) signal

signifying that it has taken control of the bus (i.e., data port).

After the UT69R000 takes control of the bus, it generates valid

address and data information. If the machine is interfacing to

slow memory or other peripheral devices that require long

memory-access times, the Data Transfer Acknowledge

(DTACK) signal extends the memory cycle time. By holding

off the assertion of DTACK, the slow device lengthens the

memory cycle until it can provide data for the machine.

The UT69R000 controls the vectoring and prioritizing of

interrupt service. Internal logic selects one of 15 interrupt

vectors, each interrupt vector is allocated four memory

locations. Use the four memory locations to store return from

interrupt service address information along with the interrupt

service routine’s location. The UT69R000 controls prioritizing

of coincident interrupts.

Perform UART control and maintenance via input/output

commands OTR and INR. These commands allow the

programmer to read UART status, and error information, as

well as upload and download information to the receive and

transmit buffers respectively.

Figure 4 shows an example of a system configuration.

INSTRUCTION

DATA

INSTRUCTION

ADD

NUI3

USER-

DEFINED

SYSTEM

INTERRUPTS

UART

I/F X

GENERAL

PURPOSE

MEMORY

I/O

DEVICE #1 I/O

DEVICE #2

BUS

ARBITER

DMA

DEVICE

1553

I/F

DMA

DEVICE

OP ADD

OP DATA

CONTROL

Figure 4. The UT69R000 Example System Configuration

UT69R000

INSTRUCTION MEMORY

CAN ONLY BE ACCESSED

BY THE UT69R000

INSTRUCTION

MEMORY

1M X 16

INTERNALLY

PULLED LOW

SERIAL I/O

BUSY

BGACK

BRQ

BGNT

(MAX)

2.0 Register File

The UT69R000 has a register-oriented architecture. The

registers within the machine fall into two categories, general

purpose and specialized registers. All registers are accessible

to the programmer through the instruction set. The programmer

uses data from these registers to perform arithmetic and logical

functions, alter program flow, detect various system and

machine faults, determine machine status, control UART and

timer functions, and for exception handling.

2.1 General Purpose Registers

Figure 5 shows the UT69R000’s 20 general purpose registers.

The UT69R000 normally accesses these registers as single-

word 16-bit registers although the machine can concatenate

these registers into 32-bit double-word register pairs. When the

programmer uses the general purpose registers as a double-

word register pair, the most significant 16 bits of the 32-bit

words are stored in the even-numbered register of the register

pair. For instance, if a 32-bit word is stored in Register Pair

XR6, the most significant word is stored in register R6 and the

least significant word is stored in register R7.

In addition to the 20 general purpose registers, the UT69R000

has a 32-bit accumulator (ACC). The ACC is normally a

destination register, although under certain circumstances it

can be the source register (INR RD, ACC). The accumulator

retains the most significant half of the product during a multiply

instruction or the remainder during a divide operation.

2.2 Specialized Registers

The UT69R000 has 13 special purpose registers. These

registers control machine configuration, report status, and

interrupts. Below is a list of the special purpose registers. The

values in the brackets indicate the power-up condition.

1. Stack Pointer Register (SP) [XXXX (hex)]

2. System Status Register (STATUS) [XXXX (hex)]

3. UART Receiver Buffer Register (RCVR)

[XX00 (hex)]

4. UART Transmitter Buffer Register (TXMT)

[XX00 (hex)]

5. Pending Interrupt Register (PI) [0000 (hex)]

6. Fault Register (FT) [0000 (hex)]

7. Interrupt Mask Register (MK) [XXXX (hex)]

8. Status/Output Discrete Register (SW)

[XXFF (hex)]

9. Instruction Counter Register (IC) [0000 (hex)]

10. Instruction Counter Save Register (ICS)

[XXXXX (hex)]

11. Instruction Register (IR) [0000 (hex)]

12. Timer A (TA) [0000 (hex)]

13. Timer B (TB) [0000 (hex)]

The instruction set provides access to most of the special

purpose registers.

2.2.1 Register Description

Stack Pointer Register

The UT69R000 uses the 16-bit Stack Pointer Register as an

address pointer on PUSH and POP instructions. The machine

pre-increments (POP) and post-decrements (PUSH) the Stack

Pointer contents. The programmer loads and stores the SP by

executing the INR and OTR commands to the stack pointer.

Bit 15 is the most significant bit, the least significant bit is bit

zero.

System Status Register

The System Status Register provides status information on the

UT69R000’s internal operation, including status of the internal

UART. The register is read via the INR Rd, STATUS

instruction. Bit definitions follow.

Figure 5. General Register Set

CONCATENATED 32-BIT

ACC

XR18

XR16

XR14

XR12

XR10

XR8

XR6

XR4

XR2

XR0

R19

R17

R15

R13

R11

ACCUMULATOR

R18

R16

R14

R12

R10

R0 REGISTER PAIR

16 BITS16 BITS

15 14

CPZNVJIM

MSB LSB

Figure 6. The System Status Register (STATUS)

Bit Number Mnemonic Description

Bit 15 C Carry. This conditional status is set if a carry is generated

or no borrow. [0]

Carry Equations:

C= (Dm * Sm * Rm) + (Dm * Sm * Rm)

+(Dm * Sm * Rm)

Where: Dm destination register most significant bit

Sm - source register most significant bit

Rm - result most significant bit (stored in

destination register)

Bit 14 P Positive. This conditional status is set if the result of an

operation is positive. [0]

Positive Equation: P = N * Z

Bit 13 Z Zero. This conditional status is set if the result of an

operation is negative. [0]

Zero Equation:Z = Rm * Rm-1 * Rm-2 * R0

Bit 12 N Negative. This conditional status is set if the result of an

operation is negative. [0]

Negative Equation: N = Rm

Bit 11 V Overflow. This conditional status is set if the result when an

overflow condition occurs. [0]

Overflow Equation:

V = (Dm * Sm * Rm) + (Dm * Sm * Rm)

Bit 10 J Normalized. This conditional status is set as the result of a

long instruction and the result is normalized. [0]

Normalized Equation: J = (R32 XOR R31)

Bit 9 IE Interrupts Enabled. This bit reflects whether interrupts are

disabled or enabled. OTR Rd, ENBL and OTR Rd, DSBL

control this bit and function. [0]

Bit 8 MME Discrete Input 1. This bit reflects the input stimulus applied

to the input pin.

Bit 7 RE Receiver Error. This bit is the logical OR combination of the

OE, FE, and PE status bits. [0]

Bit 6 OE Overrun Error. When active, this bit indicates that at least

one data word was lost because the Data Ready (DR bit 0 of

the Status Register) signal was active twice consecutively

without an INR Rd, RCVR. [0]

UART Receiver Register (RCVR)

The UART Receiver Buffer Register (see figure 7) receives

9600-baud asynchronous serial data through the UARTIN

input pin on the UT69R000. Each serial data string contains an

active-low Start bit, eight Data bits, an odd Parity bit, and an

active-high Stop bit. Figure 8 shows a single serial data string.

While receiving a serial data string, the UT69R000 generates

four status flags: Data Ready (DR), Overrun Error (OE),

Framing Error (FE), and Parity Error (PE). The UT69R000

stores these bits in the System Status Register.

Receiver buffer register bits 15-8 are always low. Bit numbers,

7 to 0 (RCD7 - RCD0) contain data the UT69R000 receives

via the serial data port. RCD7 is the MSB; RCD0 is the LSB.

Bit 5 FE Framing Error. When active, this bit indicates a stop bit was

missing from the serial transmission string. Cleared on next

transmission. [0]

Bit 4 PE Parity Error. When active, this bit indicates the serial

transmission was received with the incorrect parity. Cleared

on next transmission. [0]

Bit 3 CN Discrete Input 2. This bit reflects the input stimulus applied

to the input pin.

Bit 2 TBE UART Transmitter Buffer Empty. This bit indicates the

Transmitter Buffer Register is empty and ready for data. [0]

Bit 1 TE UART Transmitter Empty. This bit is low while the UART

is transmitting data and goes high when the transmission is

complete. [0]

Bit 0 DR UART Data Ready. This active-high signal indicates the

UART received a serial data word and this data is available.

Cleared on the execution of INR Rd, RCVR. [0]

Bit Number Mnemonic Description

15 14 13 12 11 10 9 8 7 5 4 3 2 1 0

0 50 40 30 20 10 070 60

MSB LSB

Figure 7. The UART Receiver

Buffer Register (RCVR)

54T3

R20 1

TD7

Figure 8. UART Receiver Single

Serial Data String

DATA

FLOW

UART Transmitter Buffer Register

The UT69R000’s internal UART forms an 11-bit serial string

by combining a Start bit, the eight Data bits from the

Transmitter Buffer Register, an odd Parity bit, and a Stop bit.

Figure 9 shows the composition of the serial data string. The

UT69R000 transmits this serial string through the UARTOUT

pin at a rate of 9600 baud (TIMCLK = 12MHz).

The UT69R000’s internal UART has a double-buffered data

transmission register (figure 10). The UT69R000 first loads

the data for transmission into the Transmitter Buffer Register.

If the UART Transmitter Register is empty, data from the

Transmit Buffer Register automatically transfers to the UART

Transmitter Register. At this time, the TBE bit goes active

indicating more data may be loaded into the Transmit Buffer

transmission of serial data streams and also decreases the

UT69R000’s required overhead for the UART interface. The

UT69R000 loads the 8-bit Transmit Buffer Register via the

OTR Rd, TXMT instruction.

Two status signals are associated with transmitting serial data.

These signals are the UART Transmitter Buffer Empty (TBE)

and UART Transmitter Register Empty (TE). TBE and TE are

both active high and provide information on the status of double

buffering the UART’s transmitted data. TBE and TE are read

from the System Status Register bits 2 and 1

respectively.

54T3

R20 1

TD7

Figure 9. UART Transmitter Data String

DIRECTION

OF DATA

FLOW OUT

OF THE

UT69R000

Figure 10. The UT69R000 UART Double-Buffered Transmitter Register

TBR WITH AN OUTPUT

DATA IS LOADED INTO THE

OF THE SYSTEM STATUS

READ FROM BIT 1

TRANSMITTER REGISTER IS

STATUS OF THE UART

UART TRANSMITTER

UART TRANSMITTER BUFFER 16

DATA BUS

THE UT69R000’s INTERNAL

FROM BIT 2

TBR IS READ

STATUS OF THE

DATA FLOW

DIRECTION OF

01234567

0123456 D

COF THE SYSTEM

STATUS REGISTER

Pending Interrupt Register

The Pending Interrupt Register (PI) contains information on

pending interrupts attempting to vector the Instruction Counter

Pending Interrupt Register contents. Any system interrupt,

when active, sets the corresponding bit in the register. OTR

and INR instruction can also set, clear, and read the Pending

Interrupt Register (figure 11).

Instruction INR Rd, PI stores the PI contents in the destination

destination register. OTR Rd, RPI clears the PI register. For

each bit set, to a logic one, in the destination register the

corresponding PI bit is cleared. To clear the PI, first read the

PI, then clear only the bits set to a logic one. Reading, then

clearing the PI prevents the inadvertent clearing of interrupts

occurring during execution of an OTR Rd, RPI command.

Example:

CLEAR: INR Rd, PI

OTR Rd, RPI

To generate a software interrupt clear the corresponding bit in

the PI register before writing to the PI register.

Example:

WRITE: MOV R1, 1000 (hex)

OTR R1, RPI

OTR R1, PI

Note: Do not enable interrupts while the PI is non-zero.

Bit Number Mnemonic Description

Bit 15 PWDN Power Fail

Bit 14 MCHE Machine Error Interrupt

Bit 13 INT0 External Interrupt 0

Bit 12 USR3 Software Interrupt 3

Bit 11 FIPO Fix Point Overflow

Bit 10 USR2 Software Interrupt 2

Bit 9 USR1 Software Interrupt 1

Bit 8 TIMA Timer A Interrupt

Bit 7 INT1 External Interrupt 1

Bit 6 TIMB Timer B Interrupt

Bit 5 INT2 External Interrupt 2

15 14 13 12 11 10 9 8 7 5 4 3 2 1 0

MSB LSB

Figure 11. The Pending Interrupt Register (PI)

1A1B2 3 6 4 7

Bit 4 INT3 External Interrupt 3

Bit 3 INT6 External Interrupt 6

Bit 2 INT4 External Interrupt 4

Bit 1 INT7 External Interrupt 7

Bit 0 NU Not Used*

*Note:

The UT69R000 interrupt control hardware is designed such that the following sequence always occurs:

The machine will vector to the lowest priority interrupt (vector 43Chex) if interrupts are disabled after an interrupt is latched into

the PI register. Interrupts are latched into the PI register on the falling edge of STATE1, interrupts are disabled on the falling edge

of clock CK1 internal (rising edge of CK2). The UT69R000 vectors to address 43C (hex) during the fetch cycle of the command

following the disable command.

Work Around: Vector 43C hex is not used as a normal interrupt; instead it is used to store the interrupt that occurred coincident

with disabling of interrupts. The coincident interrupt is serviced after the interrupts are re-enabled by software.

43C: INR RD, ICS

JC x, PSEUDO

NOP

PSEUDO: INR RD, PI ; read PI

OTR RD, RPI :clear PI

OTR RD, PI ;reset PI register, saves coincident interrupt

CALL RD, RD ;return

The interrupt service routine saves the interrupt that was coincident with the disable interrupt instruction. The UT69R000 will vector

to that interrupt after interrupts are re-enabled. The interrupt service routine (@43C) does not affect the condition code flags.

Fault Register

The UT69R000 uses the Fault Register (FT) to indicate the

occurrence of a machine-error fault. A machine-error fault

cannot be disabled. The UT69R000 uses the logical OR

combination of the 16 bit FT to generate a Machine Error

interrupt, bit 14 of the PI. Any bits in the FT the UT69R000

does not use are set to a logic zero. The UT69R000 reads,

writes, and clears the FT with INR and OTR instructions. Fault

cannot be reset until the external signal is negated.

15 14

MEM PARITY I/O S

ILLEGAL

BUILT-

MSB LSB

Figure 12. The Fault Register (FT)

PROT INSTRUC-

TION AND

ADD FAULT

IN-

TEST

Bit Number Mnemonic Description

Bit 15 CMPF CPU Memory Protect Fault. This bit indicates the UT69R000 has

detected an access fault on the operand but (i.e., attempted access

to write or read-protected memory). This bit is asserted only when

the UT69R000 is controlling the Operand Data Bus and the

MPROT input is asserted. [0]

Bit 14 DMPF DMA Memory Protect Fault. This bit indicates a DMA device has

detected an access fault (i.e., attempted access to write or read-

protected memory). This bit is asserted when the UT69R000 is

not controlling the Operand Data Bus and the MPROT input is

asserted.

Bit 13 MCHNE2 Machine Error 2. This bit indicates that a user-defined machine

error has occurred. Reflects status of external input pin MCHNE2.

Bit 12 SFT8 Software Error 8. This bit indicates that a user-defined software

machine error has occurred.

Bit 11 SFT7 Software Error 7. This bit indicates that a user-defined software

machine error has occurred.

Bit 10 BTERR2 I/O Bus Timer Error. This bit indicates that a bus or time-out error

occurred. The bit is set if the UT69R000 is performing an I/O

access and BTERR input is asserted.

Bit 9 SFT6 Software Error 6. This bit indicates that a user-defined software

machine error has occurred.

Bit 8 MCHNE1 Machine Error 1. This bit indicates that a user-defined machine

error has occurred. It reflects the status of external input pin

MCHNE1.

Bit 7 BTERR1 Memory Bus Timer Error. This bit indicates that a bus or time-out

error occurred. The bit is set if the UT69R000 is performing a

memory access and the BTERR input is asserted.

Bit 6 SFT6 Software Error 6. This bit indicates that a user-defined software

machine error has occurred.

Bit 5 SFT5 Software Error 5. This bit indicates that a user-defined software

machine error has occurred.

Bit 4 SFT4 Software Error 4. This bit indicates that a user-defined software

machine error has occurred.

Bit 3 SFT3 Software Error 3. This bit indicates that a user-defined software

machine error has occurred.

Bit 2 SFT2 Software Error 2. This bit indicates that a user-defined software

machine error has occurred.

Bit 1 SFT1 Software Error 1. This bit indicates that a user-defined software

machine error has occurred.

Bit 0 SFT0 Software Error 0. This bit indicates that a user-defined software

machine error has occurred.

Bit Number Mnemonic Description

Interrupt Mask Register

The Interrupt Mask Register (MK) contains one mask bit for

each of the 15 system interrupts. All bits in the MK are set or

reset under software control, setting bits 15 and 10 has no effect

on the UT69R000’s interrupt operation because these

interrupts cannot be masked. The UT69R000 reads and writes

the MK with instructions OTR Rd,MK and INR Rd,MK. A

logical one unmasks an interrupt; logic zero masks an interrupt.

Bit Number Mnemonic Description

Bit 15 PWDN Non-Maskable Interrupt

Bit 14 MCHE Machine Error Interrupt

Bit 13 INT0 External Interrupt 0

Bit 12 FLPO Software Interrupt 3

Bit 11 FIPO Fix Point Overflow

Bit 10 EXCL Software Interrupt 2

Bit 9 FLPN Software Interrupt 1

Bit 8 TIMA Timer A Interrupt

Bit 7 INT1 External Interrupt 1

Bit 6 TIMB Timer B Interrupt

Bit 5 INT2 External Interrupt 2

Bit 4 INT3 External Interrupt 3

Bit 3 IOLI External Interrupt 6

Bit 2 I0L2 External Interrupt 4

Bit 1 INT7 External Interrupt 7

Bit 0 NU Not Used (see Note on page 11)

15 14 13 12 11 10 9 8 7 5 4 3 2 1 0

MSB LSB

Figure 13. The Interrupt Mask Register (MK)

U A B1 2 3 1 4 2

Status/Output Discrete Register

The Status/Output Discrete Register reports the C, P, Z, and N

bits of the System Status Register along with controlling the

output discrete bus (OD(7:0)). Register bits C, P, Z, and N

contain the same information as the System Status Register bits

15, 14, 13, and 12. Control of the output discrete bus is allowed

via bit 0 through 7 of this register. Use input and output

instructions INR Rd, SW and OTR Rd, SW to write and read

this register. Use this register to restore the condition codes

after interrupt service routines.

Bit Number Mnemonic Description

Bit 15 C Carry

Bit 14 P Positive

Bit 13 Z Zero

Bit 12 N Negative

Bit 11 U/D User-defined

Bit 10 U/D User-defined

Bit 9 U/D User-defined

Bit 8 U/D User-defined

Bit 7 OD7 Output Discrete 7

Bit 6 OD6 Output Discrete 6

Bit 5 OD5 Output Discrete 5

Bit 4 OD4 Output Discrete 4

Bit 3 OD3 Output Discrete 3

Bit 2 OD2 Output Discrete 2

Bit 1 OD1 Output Discrete 1

Bit 0 OD0 Output Discrete 0

15 14 13 12 11 10 9 8 7 5 4 3 2 1 0

CONDITION USER-

DISCRETE

MSB LSB

Figure 14. The Status/Output Discrete Registers (SW)

STATUS

(CS) DEFINED

Instruction Counter and Instruction Register

The UT69R000’s instruction port interface consists of a 20-bit

instruction address and a 16-bit data bus. The Instruction

Counter (IC) supplies the 20-bit address to memory. The

instruction read from memory is then stored into the Instruction

internal latches, a Primary Instruction Register latch (PIR, 16-

bits wide) and the Instruction Register latch (IRL, 16-bits

wide). These two sets of latches allow the UT69R000 to

perform overlapping memory fetch and execute cycles. This

means the UT69R000 performs a delayed branch when the flow

of the program is interrupted. A delayed branch implies that

the UT69R000 fetches and executes the instruction following

the branch condition before the UT69R000 executes the first

instruction at the branch location.

Instruction Counter Save Register

The UT69R000 uses the Instruction Counter Save Register

(ICS) when servicing interrupts and branch instructions. When

an interrupt or branch occurs, the UT69R000 saves the IC in

the ICS. Read the ICS immediately after entering the target

routine to save the return location before any other IC save

occurs. The UT69R000 reads the ICS using input instruction

INR XRd, ICS. Please note that the ICS read requires a 32-bit

wide register.

Timer A and Timer B

Timer A and B registers are 16-bit binary counters. Input/

output instructions start, halt, read, and write these counters.

Timer A resolution is 10µs per bit, Timer B has a resolution of

100µs per bit (TIMCLK at 12 MHz). Each timer generates a

time-out interrupt when the counter transitions from FFFF

(hex) to 0000 (hex). Time intervals before interrupt are defined

as the difference between the loaded value and 0000 (hex). For

example, load Timer A with the value FFFE (hex), start Timer

A; an interrupt occurs 20µs later as the timer transitions from

FFFF (hex) to 0000 (hex). The Pending Interrupt Register

reflects this time-out condition.

Modify the resolution of Timer A and B by scaling the

TIMCLK input. For example, to decrease Timer A resolution

from 10µs to 64µs per bit, TIMCLK is decreased to 1.88 MHz.

3.0 Instruction Port

Instruction port signals include a 20-bit address bus RA(19:0),

a 16-bit data bus RD(15:0), and two control signals OE and

WE. During instruction and data fetch cycles, OE is asserted

(WE negated). Write operations to the port asserts WE and

negates OE. Primarily designed for fast access of instruction

information, the instruction port does not allow for the

inclusion of wait states.

The UT69R000 divides all operations into four distinct time

periods (CK1 through CK4). These time periods are based on

the processor clock. The UT69R000 performs a separate

function during each of these four time periods.

During CK1, the UT69R000 begins executing the instruction

in the Primary Instruction Register (PIR). The instruction

executed is the instruction the UT69R000 fetched during the

previous bus cycle. Also during CK1, the instruction address

for the next instruction to fetch from memory becomes valid.

(Thus, the overlapping fetch and execute cycles of the

UT69R000.) STATE1 output goes low, indicating the

UT69R000 is executing an instruction.

The UT69R000 begins variable width clock period CK2 after

completing CK1. For 2 and 3 clock cycle instructions CK2

remains one-half clock cycle in length. During four clock cycle

instructions CK2 is stretched to one and a half clock cycles.

The following conditions extend time period CK2: (1)

Executing a STRI instruction, (2) Executing a LRI instruction,

or (3) Executing any instruction access to the operand port. The

UT69R000 also extends clock period CK2 for the Operand Port

arbitration process. The UT69R000 samples the logical AND

combination of BUSY and inverted BGNT during CK2. If this

combination is low, time period CK2 extends until the

combination of the two signals is high, indicating the

UT69R000 now controls the Operand Port. STATE1 output

remains low for the entire CK2 time period.

At the beginning of CK3, STATE1 goes high indicating the

next instruction is being fetched from memory. The

UT69R000’s operand address and data buses become active at

the beginning of CK3 along with the Bus Grant Acknowledge

(BGACK), M/IO, and R/WR signals. Data Strobe (DS) asserts

one clock cycle after the beginning of CK3, one and a half clock

cycles after the start of CK4.

Following CK3 is variable length clock period CK4. The

stretch of CK4 occurs during the following instruction

executions: (1) Executing a STRI instruction, (2) Executing a

LRI instruction, (3) Executing any instruction with Long

Immediate data (e.g., MOV Rd, FFFFh), or (4) Executing any

operand port access. After time period CK4 starts, the

transparent latches that make up the Primary Instruction

instruction from memory.

If the instruction being executed requires access to the operand

bus, DS goes active. The UT69R000 samples the Data Transfer

Acknowledge (DTACK) on the next and every subsequent

rising edge of the processor clock. If DTACK is not low, the

UT69R000 extends time period CK4 until DTACK becomes

active or until an error condition is detected -- either Bus Error

(BTERR) or Memory Protect (MPROT) becomes active.

STATE1 remains high during the entire CK4 time period.

Figures 15, 16, and 17 show the timing relationships for CK1,

CK2, CK3, and CK4 during 2, 3, and 4 clock cycle instructions.

3.1 Instruction Port Operations

Most applications dedicate the instruction port to program

information. For these applications WE is always negated. The

UT69R000 can manipulate the instruction port through

instructions Store Register to Instruction Memory (STRI, write

access) and Load Register from Instruction Memory (LRI, read

access). Section 3.1.1 and 3.1.2 review the STRI and LRI

instructions.

3.1.1 STRI Instruction Bus Cycle

During an STRI instruction, instruction data moves from the

UT69R000 to the instruction memory. Figure 18 shows the

timing diagram of the signal relationships for the UT69R000

during STRI Instruction Bus Cycle Operation. Before the

UT69R00 executes the STRI instruction, the system

programmer must load the Accumulator Register with the

address which will receive the data. When the ACC is loaded

with the address information, the UT69R000 can begin

executing the STRI instruction.

Executing the STRI instruction begins when the falling edge

of OSCIN signals the start of time period CK1. At the beginning

of CK1, the data previously stored in the ACC becomes a valid

address on the instruction port address bus (RA(19:0)) and

STATE1 output becomes active, indicating the UT69R000 is

executing an instruction.

OSCIN

CK1

CK2

CK3

STATE1 EXECUTE FETCH

Figure 15. Machine Cycle 1 (2 Clock Cycle Instructions)

CK4

RA(19:0)

RD(15:0)

Valid Address Valid Address Valid Address

Instruction Data Instruction Data Instruction Data

Note:

1. Examples of two clock cycle instructions include (internal operations):

MOV Rd, Rs

ADD Rd, Rs

3.1.2 LRI Instruction Bus Cycle

During an LRI instruction, the UT69R000 moves the

instruction data from the instruction memory to the

UT69R000.Figure 19 shows the timing diagram of the signal

relationships for the UT69R000 during an LRI Instruction Bus

Cycle.

Just as with the STRI instruction, before the UT69R000

executes the LRI instruction the system programmer must load

the UT69R000’s accumulator with the address from which the

data will be read. After the ACC is loaded with the address

information, LRI instruction execution can take place.

OSCIN

CK1

CK2

CK3

CK4

Figure 16. Machine Cycle 2 (3 Clock Cycle Instructions)

STATE1 EXECUTE FETCH

RA(19:0)

RD(15:0)

Note:

1. Examples of three clock cycle instructions include (operand port accesses):

LR Rd, Rs

STR Rd, Rs

STATUS

A(15:0)

D(15:0)

Address Valid

Data Read

Control Valid

Fetch Address Valid

Fetch Instruction

Fetch Address Valid

Fetch Instruction

(M/IO, R/WR)

Executing the LRI instruction begins when the falling edge of

OSCIN signals the start of time period CK1. At the beginning

of CK1, the data previously stored in the ACC becomes a valid

address on the instruction port address bus (RA(19:0)) and

STATE1 output becomes active indicating the UT69R000 is

executing an instruction.

The data on the data bus is read into the UT69R000 during time

period CK2. The function of the remainder of the bus cycle

(time periods CK3 and CK4) is the same as for other

instructions. STATE1 is high, indicating the next instruction

is being fetched from memory and is ready for execution during

the next bus cycle.

4.0 Operand Port

The UT69R000 Operand Data bus interface supports multiple

processor and direct memory access (DMA) configurations.

The Operand Address bus A(15:0), data bus D(15:0), and

memory control bus signals (DS, R/WR, and M/IO) are TTL-

compatible outputs that may be placed in a high-impedance

state. These signals are only active during bus cycles when the

UT69R000 is the current bus master. On other bus cycles, these

signals enter a high-impedance state so an alternate bus master

can control the port.

OSCIN

CK1

CK2

CK3

CK4

STATE1

Figure 17. Machine Cycle 3 (4 Clock Cycle Instructions)

EXECUTE

RA(19:0)

RD(15:0)

Note:

1. Examples of three clock cycle instructions include (long immediate accesses):

MOV Rd, FFFF (hex)

ADD Rd, FFFF (hex)

STATUS

A(15:0)

D(15:0)

Address Valid

Data Read

Control Valid

Fetch Address Valid

Fetch Instruction

Immediate Address

Immediate Data

FETCH

Fetch Address Valid

Fetch Instruction

(M/IO, R/WR)

Four signals make up the arbitration control bus -- Bus Request

(BRQ), Bus Grant (BGNT), Bus Busy (BUSY), and Bus Grant

Acknowledge (BGACK) .

4.1 Operand Bus Cycle Operation

The timing diagrams in figures 20, 21, and 22 show signal

relationships for the UT69R000 during an operand bus cycle

operation. The UT69R000 performs one of four operations

involving bus cycles on the Operand buses: (1) Memory Read,

(2) Memory Write, (3) I/O Read, and (4) I/O Write. The

UT69R000 performs all four bus cycle operations similarly.

The M/IO and R/WR signals determine the precise type of bus

cycle operation. For the following discussion, refer to figures

20, 21, and 22.

When the Operand bus arbitration process is complete and the

UT69R000 controls the Operand address and data buses, time

period CK3 begins. The UT69R000 signal controls the

Operand port at the beginning of time period CK3 by asserting

BGACK. STATE1 transitions from low to high. At the same

time, the following signals become valid: R/WR, M/IO, and

the Operand Address bus RA(15:0). Control signals R/WR and

M/IO determine the direction and type of bus cycle

taking place.

One-half clock cycle after the beginning of time period CK4

or one full clock cycle after the start of time period CK3, DS

goes active low. After DS has asserted, the UT69R000 samples

the DTACK input on every subsequent rising edge of OSCIN

to determine the duration of CK4. A bus cycle terminates one-

half clock cycle after the rising edge of OSCIN when the

UT69R000 detects assertion of DTACK. At this time, the

Operand Address Bus A (15:0) and the Operand bus control

signals (R/WR, M/IO) select the memory or I/O location from

which the Operand Data is read, or to which the Operand Data

is written. The UT69R000 also samples the and

BTERR inputs on the same rising edge of OSCIN. These two

inputs indicate an error condition and terminate the current

bus cycle.

Figure 18. STRI Instruction Typical Timing

DATA VALID (RSn)

STRI

NEXT ADDRESSADDRESS VALID (ACC)

DATA

RISC

ADDRESS

RISC

OSCIN

CK1

CK2

CK3

CK4

INSTRUCTIONINSTRUCTION

STATE1

MPROT

After the UT69R000 recognizes the current bus cycle is

finished, DS becomes inactive (transition from low to high) on

the first rising edge of OSCIN after the end of time period CK4.

The bus cycle completely ends one full clock cycle after the

end of time period CK4, when BGACK, R/WR, and the

Operand Address and Data buses enter a high-impedance state.

4.2 DMS Operation and Bus Arbitration

Figure 22 shows the timing diagram of the signal relationships

for the UT69R000 during a DMA operation. For DMA

operations, multipurprocessor, and Operand bus arbitration

functions, the UT69R000 provides four active-low control

signals for managing the Operand bus and preventing bus

contention. These signals are Bus Request (BRQ, Bus Grant

(BGNT), Bus Busy (BUSY), and Bus Grant Acknowledge

(BGACK).

Each of the four bus control signals provides a specific function

for controlling Operand bus operation. The function of each

of the four signals is given below.

Bus Request (BRQ)

The UT69R000 generates BRQ to indicate a request to use the

Operand buses. The UT69R000 retains control of the buses by

keeping the BGACK signal active until it no longer requires

the buses.

Bus Grant (BGNT)

An external arbitrator generates this input indicating to the

UT69R000 that it has the highest priority. This informs the

UT69R000 to control the Operand buses as soon as the present

bus master relinquishes bus control by asserting BUSY.

Bus Busy (BUSY)

Another bus master generates BUSY input to the UT69R000,

indicating another bus master is using the bus.

Bus Grant Acknowledge (BGACK)

The UT69R000 generates this signal to indicate it is the present

bus master. BGACK enters a high-impedance state when the

UT69R000 gives up control of the Operand buses.

CK4

CK3

CK2

CK1

OSCIN

RISC

ADDRESS

RISC

DATA

ADDRESS VALID (ACC) NEXT ADDRESS

LRI

DATA VALID (RSn)

Figure 19. LRI Instruction Typical Timing

INSTRUCTIONINSTRUCTION

STATE1

ON THESE FALLING EDGES

OSCIN

CK1

CK2

CK3

CK4

INSTRUCTION

ADDRESS

INSTRUCTION

DATA

EXECUTING THE RISC

INSTR. FETCHED DURING

THE PREVIOUS CYCLE

PRIMARY INSTR.

ARE OPEN

FETCHING THE RISC

INSTR. TO BE EXECUTED

DURING THE NEXT CYCLE

VALID INSTRUCTION ADDRESS

VALID INSTRUCTION DATA

OPERAND

DATA

OPERAND

ADDRESS

CONTROL

VALID OPERAND ADDRESS

VALID OPERAND DATA

VALID BUS CONTROL SIGNALS

Figure 20. Typical UT69R000 Bus Cycle With Extended Clock Cycles

RD(15:0)

RA(15:0)

A(15:0)

D(15:0)

BRQ

BGNT

BUSY

BGACK

STATE1

BGNT AND BUSY ARE SAMPLED

DATA

OPERAND

ADDRESS

OPERAND

CONTROL

CK4

CK3

CK2

CK1

OSCIN

(1)

ADDRESS VALID

DATA VALID

(2)

Figure 21. Typical UT69R000 Data Bus Cycle Operation

Notes:

STATE

BRQ

BGNT

BGACK

R/WR

DTACK

1. DTACK must be active by this edge to avoid wait states.

2. DTACK is sampled by the rising edges of OSCIN.

DATA

OPERAND

ADDRESS

OPERAND

CONTROL

CK4

CK3

CK2

CK1

OSCIN

ADDRESS VALID

DATA VALID

(1)

Figure 22. Typical UT69R000 DMA Bus Cycle

Note:

1. BGNT is sampled by the falling edges of OSCIN. Wait states are inserted until BGNT is low and BUSY is high.

DTACK

BGACK

BGNT

BRQ

STATE1

R/WR

The UT69R000 requests control of the Operand buses at the

beginning of time period CK2 by asserting BRQ. On every

subsequent falling edge of OSCIN, the UT69R000 samples the

BGNT and BUSY inputs. When the UT69R000 detects on the

falling edge of OSCIN that BGNT has gone low and BUSY

has gone high, the UT69R000 is the new bus master and can

now control the Operand buses. The UT69R000 locks out any

other bus master from controlling the Operand buses by

asserting BGACK at the beginning of time period CK3 and

holding BGACK active until it is ready to relinquish control

of the Operand buses. The UT69R000 holds the BGACK

signal active until the beginning of the CK3 time period of the

next bus cycle when the UT69R000 no longer controls the

Operand buses.

5.0 Discrete Input/Output

To control external hardware and receive external information,

the UT69R000 has an 8-bit output discrete bus and two discrete

inputs. The discrete input function allows for easy gathering of

information from the subsystem. The output discrete bus

allows the UT69R000 to control subsystems via a combination

of hardware and software.

5.1 Output Discrete Bus

The UT69R000 has eight user-defined output discretes

(OD(7:0)). Output Register Instruction OTR Rd,SW governs

the logic state of each output discrete. The Status/Output

Discrete Register reflects the state of the output discretes.

Software can read the contents of this register by executing.

the Input Register Instruction INR Rd,SW.

RA(19:0)

RD(15:0)

OD(7:0)

OSCIN

CK1

CK2

CK3

CK4

STATE1 EXECUTE FETCH EXECUTE

OTR RA,SW

XXXX (hex)

OTR RA, SW

Figure 23. Output Discrete Bus Timing

OD(7:0) Valid

Useful in the control of external subsystem hardware, the

output discrete function is fully static and remains unchanged

until rewritten. Outputs can drive standard (i.e., sink or source)

TTL loads. These outputs three-state on the assertion of the

TEST input pin. Figure 23 shows the timing relationships for

a write to the output discrete bus.

5.2 Discrete Inputs

Status register bits DI1 and DI2, bits 8 and 3 respectively,

reflect the stimulus applied to the input pins. In a system

application the software would make decisions based on the

state (i.e., logic one or zero) of either or both of these bits. The

system software would poll the Status Register by executing

an Input Register Instruction INR Rd,SW; the software then

proceeds to perform a test bit on the appropriate bit (i.e., 3 or

8). The result of the test bit determines the next task performed

by the software. Section 7.0 discusses an example of using a

discrete input to control program for entering the monitor

program. Both DI1 and DI2 input buffers have pull-down

resistors and can float if not in use. 6.0 Interrupts

6.0 Interrupts

The UT69R000 has 15 levels of internal interrupt prioritizing.

Upon the occurrence of an enabled non-masked interrupt, the

UT69R000 program flow (i.e., instruction counter) transfers to

the appropriate interrupt vector. The interrupt vector points to

an interrupt service routin e. Af ter completing the interrupt

service routine the program flow is return ed to the main

program location. Table 1 shows a list of UT69R000 interrupts.

6.1 Interrupt Control

The Pending Interrupt Register, Mask Register, Status

processing. These registers contain the following interrupt

information:

- Interrupt events (PI)

- Interrupt status, masked versus unmasked (MK)

- Interrupt status, enabled versus disabled

(STATUS bit 9)

- Machine error interrupts (FT)

Table 1. Interrupt Definitions

INTERRUPT

NUMBER

(Highest

Priority)

DESCRIPTION

Power-Down Interrupt.Cannot be masked or disabled.

Machine Error. Cannot bedisabled.

INT0. External user interrupt.

Software interrupt (USR3)

Fixed-poin t over flow. (V bi t)

Software interrupt (USR2)

Software interrupt (USR1)

Timer A (If implemented).

INT1. External user interrupt.

Timer B (If implemented).

INT2. External user interrupt.

INT3. External user interrupt.

INT4. External user interrupt.

INT6. External user interrupt.

(Lowest

Priority)

INT5. External user interrupt.

The interrupt architecture allows for the disabling and masking

of certain interrupts. Output Register Instruction OTR

Rd,ENBL and OTR Rd,DSBL control the disable and enable

of interrupts. The conten t of the Rd register is a “don’ t care”

for these commands. Status Register bit 9 reflects the state of

interrupts (i.e., enabled or disabled). The Mask Register

provides the abili ty to mask the service of user selected

interrupts. Interrupts awaiting service are reflected in the PI

Instructions INR Rd,PI, OTR Rd,PI and OTR Rd,RPI read,

write, and clear the PI Register. To latch an inte rru pt into the

PI Register the corresponding bit must be a logic zero before

the event occurs. An integral part of interrupt service should

include the clearing of the appropriate bit in the PI Register.

Section 2.2.1 shows an example of clearing the PI register.

6.1.1 Interrupt Statu s

The architecture of the UT69R000 allows for the disabling and

masking of interrupts. If the software cannot support interrupt

service the software can disable (i.e., not recognize) interrupts.

The disable feature will prevent the servicing of all interrupts

with the exception of power fail (PFAIL) and software interrupt

(USR2). The UT69R000 will log these int erru pts int o the PI

Re-enabling interrupts with a non-zero PI Register will result

in the UT69R000 vectoring to the highest priority interrupt. T o

prevent the service of these interrupt clear the PI Register

before re-enabling interrupts.

The mask feature allows the software to select particular

interrupts for service while m a sk ing others. The selection of

interrupts, via the mask feature, for service is controlled

through the MK Register. Input Register and Output Register

Instructions INR Rd,MK and OTR Rd,MK read and write the

MK register. The mask feature prevents the servicing of all

interrupts with the except ion of PFAIL and USR2. Similiar to

the disable feature, unmasking and interrupt with a non-zero

PI Register results in the vectoring to the appropriate interrupt

vector . W riting a logical zero into a Mask Register bit location

will prevent the recognition of the specific interrupt (i.e.,

mask). To un-mask all interrupts write FFFF (hex) to the MK

To enable the UT69R000 interrupts architecture the software

program enables interrupts by executing instruction OTR

Rd,ENBL, followed by a write to the Mask Register, OTR

Rd,MK. Interrupts are enabled and disabled on the falling edge

of internal clock cycle CK1 (rising edge of CK2).

6.1.2 Interrupt Processing and Vectors

The occurrence of an enabled and non-masked interrupts

results in the altering of program flow. Interrupt processing

begins by saving the present Instruction Counter Register (IC)

in the Instruction Counter Save Register (ICS) followed by

automatic disabling of all interrupts (Status Register Bit 9

equals logic 0). The UT69R000 then loads the designated

interrupt vector location into the Instruction Counter. The

UT69R000 begins interrupt service by executing the code

residing at the interrupt vector location.

Interrupt vectors reside from memory location 400 (hex) to 43C

(hex). Each interrupt is assigned a vector with four memory

locations (see table 2). These four memory locations allow for

storage of the Instruction Counter Save Register (ICS) and a

jump (JC), branch (BR), or call (CALL) to the interrupt service

routine. An example is shown below.

ISR0_INT0: 408 (h ex) INR xR0, ICS

409 (hex) CALL xR18, ISR0

40A (hex) ISR0

40B (hex) NOP

Table 2. Interrupt Instruction Counter

Load Location

INTERRUPT

NUMBER LOCATION

(HEX)

MASK-

(Y/N)

CAN USER

DISABLE

(Y/N)

ABLE

15*

0400

0404

0408

040C

0410

0414

0418

041C

0420

0424

0428

042C

0430

0434

0438

043C

* See note on page 11.

Read the ICS register with an Input Register Instruction INR

Rd,ICS before interrupts are re-enabled or before executing a

program branch to assure that the return address in the ICS is

not overwritten. The CALL instruct ion saves the IC in to the

ICS register and overwrites the interrupt return address with

the CALL return address. Similarly, if the interrupts are re-

enabled before the interrupt return address is read from the ICS,

the occurrence of a new interrupt causes the old return address

to be overwritten. It is suggested for CALL instructions the

software reserve register pair xR16 for ICS storage; for

interrupts the software reserve register pair xR18 for ICS

storage. When nested CALLs or interrupts are encountered, the

address values stored in register pairs xR16 and xX18,

respectively, must be stored in system memory to provide the

UT69R000 with full return inform ation.

6.2 Interrupt Sources

Interrupt sources include nine externally generated hardware

interrupts, two internally generated hardware interrupts, and

four internally generated software interrupts. External

interrupts include: INT(6:0), MCHNE(2:1), PFAIL, BTERR,

MPROT, and MPAR. Internal hardware interrupts in clud e

TIMA and TIMB. Software interrupts in clude USR(3:1) and

FIPO.

User-defined hardware interrupts INT (6:0) are available to

signal the occurrence of events which require special action by

the UT69R000. User-defined interrupts are entered into PI

interrupts TIMA and TIMB signal the wrap-around of either

of these 16-bit counters from FFFF (hex) to 0000 (hex).

Machine error interrupts MCHNE(2:1), BTERR, MPROT, and

MPAR designate machine error interrupts. The UT69R000

enters machine error interrupts into the Fault Register, the

logical OR of all Fault Register bits generates the stimulus to

control bit 14 of the PI Register. On the occurrence of a

Machine Error Interupt the host examines the Fault Register to

determine the specific event that generated the interrupt. Input

Rd,FT, and OTR Rd,RFT read, write, and clear the Fault

Generate software interrupts by executing an Output Register

Instruction OTR Rd,PI. User-defined software interrupts

include USR3, USR2, and USR1. A fourth software interrupt

includes FIPO, fixed-point overflow. When enabled and not

masked interrupt FIPO signals the assertion of condition code

bit V to a logical one. Generate user-defined interrupt USR3,

USR2, and USR1 by writing to the PI Register. Please note;

clear the specific bit in the PI Register before attempting to

generate a software interrupt.

6.3 Interrupt Hardware

All the UT69R000 external interrup ts are level tr iggered.

Interrupts INT(6:0) and PF AIL are sampled on the rising edge

of the OSCIN and latched into the PI Register on the falling

edge of STATE1 (rising edge of CK1). The minimum pulse

width for these inputs is 500 ns.

Machine error interrupts MCHNE(2:1), BTERR, MPAR, and

MPROT provide stimulus to the PI Register through an S-R

flip-flop. The architecture requires removal of the interrupt

signal before the Fault Register (FT) and PI Register can be

cleared. If the FT and PI Register is cleared while the interrupt

input is asserted the specific FT and PI Register bit is re-

asserted.

6.4 Interrupt Latency

Figures 24, 25, and 26 display the latency associated with

servicing of interrupts. When an interr upt is sampled into the

UT69R000 before the falling edge of STATE1 (figure 24)

interrupt service begins during the following execute machine

cycle (STATE1 low). If the interrupt is sampled into the

UT69R000 after the falling edge of STATE1 (figure 26)

interrupt service is delayed one execution cycle. Interrupts are

first sampled into the device and then latched into the PI

When the interrupt is latch ed coinci dent with the fetch and

execution of a CALL instruction the interrupt latency increases.

Figure 25 shows interrupt latency associated to the CALL

instruction. The increase in inter rup t latency is due to the

temporary disable of the latching of interrupts into the PI

instruction. The disable is necessary to allow for the UT69R000

to execute the CALL instruction before servicing th e

interrupt.7.0 Monitor

7.0 Monitor

Communication between the UT69R000 and a dumb terminal

or IRSIM is established via a monitor program written to

support the internal UART. When operating in the monitor

mode the programmer can (1) examine and modify the

UT69R000’s internal registers; (2) examine and modify the

contents of the operand port memory; (3) examine and modify

the contents of I/O subsystems; (4) control program execution.

UTMC offers a monitor shell program for the UT69R000. The

software programmer can tailor the monitor program to meet

specific application.

Assertion of a discrete input can signal the UT69R000 to enter

the monitor mode of operation. To perfo rm this fun ction the

application software polls the Status Register looking for the

assertion (i.e., transition to logic one) of the appropriate

discrete input. The UT69R000 then enters the monitor program

via a CALL or BR instruction. Interrupts can also be used to

access the monitor program. An example of this technique is

accessing the monitor on a specific condition. A specific

interrupt event (e.g., memory access location 100) can generate

a hardware interrupt to the PF AIL input. Accessing the monitor

allows the software programmer to evaluate the state of the

UT69R000 and system (i.e., memory or I/O subsystem).

Figures 27 and 28 show an example.

7.1 Using The Monitor

When the UT69R000 enters the Monitor mode, it begins

executing the monitor program stored in the instruction port.

The UT69R000 initially sets its internal UART as the default

monitor interface.

To control the UT69R000 with the Mon itor, the user simply

transmits a predefined set of ASCII characters over the serial

data port. The list of the predefined ASCII characters

meaningful to the UT69R000’ s Monitor mode are described in

detail in the following sections. The UT69R000 can receive

these Monitor control commands with its internal UART,

decode them, and then take the appropriate action. All AS CII

characters must be ca pita lized for the UT69R000 to

recognize them.

The four primary ASCII control characters are E, M, C, and R.

These control characters permit the system user to Examine or

Modify instruction memory, Operand memory, external I/O,

and internal registers, Continue Execution, and Run From a set

starting location.

OSCIN

CK1

CK2

CK3

CK4

EXECUTE

(NOP)

PIR OPEN PIR CLOSE

EXECUTE

INTERRUPT SERVICE

COMMANDS

PRIMARY INSTRUCTION REGISTER

(PIR)

FETCH

(NOP)

STATE

RA(19:0)

RD(15:0)

INT

INTERRUPT

ADDRESS VALID

INTERRUPT

INSTRUCTION VALID

Figure 24. Interrupt Timing

Assumes:

1. Interrupts enabled at time zero.

2. No mask bits set at time zero. Do not care field

Do not care field

OSCIN

CK1

CK2

CK3

CK4

EXECUTE

(CALL) EXECUTE

(NOP)

INTERRUPTS DISABLED DUE TO FETCH

OF CALL OR JMP

INSTRUCTION

FETCH

(CALL)

INTERRUPT

ADDRESS VALID

INTERRUPT

INSTRUCTION VALID

RA(19:0)

RD(15:0)

FETCH

(NOP) EXECUTE

INTERRUPT SERVICE

COMMANDS

Figure 25. Interrupt Timing

STATE1

INT

Assumes:

1. Interrupts enabled at time zero.

2. No mask bits set at time zero.

Do not care field

OSCIN

CK1

CK2

CK3

CK4

EXECUTE

(ENOP)

PIR OPEN PIR CLOSE

RA(19:0)

RD(15:0)

EXECUTE

INTERRUPT SERVICE

COMMANDS

PRIMARY INSTRUCTION REGISTER (PIR)

FETCH

(NOP) FETCH

(INR) EXECUTE

(INR)

INTERRUPT

ADDRESS VALID

INTERRUPT

INSTRUCTION VALID

Figure 26. Interupt Timing

STATE1

INT

Assumes:

1. Interrupts enabled at time zero.

2. No mask bits set at time zero.

Do not care field

PROGRAM

CODE

XXXXX(hex)

EXTERNAL HARDWARE INTERRUPT

OR OUTPUT DISCRETE:

IC ICS

IC INTERRUPT MAP ADDRESS

4XX (HEX)

INTERRUPT SERVICE ROUTINE:

4XX (hex) INR xR16, ICS ;SAVE ICS

4XX (hex) CALL xR18, MONITOR ; MONITOR CODE

4XX (hex) MONITOR

4XX (hex) NOP

Figure 27. Monitor Operation

Monitor Mode

UT69R000

UART PORT CONSOLE

TERMINAL

UT69R000

MONITOR

RS-232 Port

Examine

(EI, EO, EE, ER)

Continue

(C0, C1, C2, C3)

Run

(R0, R1, R2, R3)

Modify

(MI, MO, ME, MR)

Figure 28. Monitor Mode Operation

7.1.1 Examine Command

The Examine Command has four variations:

(1) EIxxxx - The Examine Instruction memory command.

This command permits the user to examine any memory

location within the 64K instruction memory space. The

EI command is followed by the 16-bit Hex address, above

as “xxxx,” of the memory location to examine. Valid

characters for the instruction address field (xxxx) are 0-

9 and A-F.

The user can examine consecutive memory locations by

repeatedly entering Space characters. The Monitor

continues to display the contents of contiguous memory

locations until any non-Space character is received. When

the Monitor receives a non-Space character, it terminates

EI command execution and waits for the next valid

Monitor command.

(2) EOxxxx - The Examine Operand memory command.

This command works exactly the same as the EI

command except that the user can now examine Operand

memory.

(3) EExxxx - The Examine External (I/O) command. This

command works exactly the same as the EI and EO

commands except that the user can now examine any

external I/O location.

(4) ER - The Examine Register command. The Examine

UT69R000’s internal registers.

After the UT69R000 has received the ER command, it

displays the contents of register R0. The user can examine

additional registers by repeatedly transmitting Space

characters to the UT69R000. The Monitor displays the

registers one after another in the following order: R0

through R15, Status/Output Discrete register (SW),

Pending Interrupt Register (PI), Interrupt Mask Register

(MK), Fault Register (FT), Timer A (TA) and Timer B

(TB). The UT69R000 continues to display its registers

until the UT69R000 receives a non-Space character

oruntil the UT69R000 has displayed the complete list of

registers. At this time the UT69R000 terminates the ER

command and waits for the next valid Monitor command.

7.1.2 Modify Command

The Modify Command has four variations:

(1) MIxxxx,vvvv - The Modify Instruction memory

command. This command permits the user to modify any

memory location within the 64K instruction memory

space. The MI command is followed by the 16-bit Hex

address denoted above as “xxxx,” of the memory location

to examine and the 16 bit Hex value denoted above as

“vvvv ,” the user wishes to place in this memory location.

Valid characters for the instruction address field (xxxx)

and value field (vvvv) are 0-9 and A-F.

The user can modify consecutive memory locations by

entering multiple 16-bit values in the MI command. The

MI command would then take the form :

MIxxxx,vvvv,vvvv,...,vvvv where the user can enter as

many new values as desired. The commas are optional as

delimiters. The UT69R000 now modifies instruction

memory starting at the given address (xx xx ) an d

continues to modify memory until all new values are

in memory.

(2) MOxxxx,vv vv - The Modify Operand memory

command. This command works exactly the same as the

MI command except that the user can now modify

Operand memory . The form of the MO command to alter

multiple Operand memory locations is:

MOxxxx,vvvv,vvvv,...,vvvv.

(3) MExxxx,vvvv - The Modify External I/O command. This

command works exactly the same as the MI and MO

commands except that the user can now modify any

external I/O location. The form of the ME command to

alter multiple external I/ O locati ons is:

MExxxx,vvvv,vvvv,...,vvvv.

(4) MRrr,vvvv - The Modify Register command. The Modify

UT69R000’s internal registers. The MR command is

followed by an 8-bit register ID code, denoted as rr, and

a 16-bit value, denoted as vvvv. See Attachment 1 for a

list of the register IDs that the UT69R000 recognizes.

Valid characters for the register ID field (xxxx) and value

fields (vvvv) are

0-9 and A-F.

The user can use only one MR command to modify one

UT69R000 register. Modifying additional registers

requires transmitting a separate MR command for

each change.

7.1.3 Continue Command

The Continue Execution Command allows the user to resume

program execution from the point where the Monitor mode of

operation was entered. The Continue Execution command

takes the form:

C0-Resume execution with Timers A and B halted.

C1- Resume execution with Timer A on and Timer B off.

C2 - Resume execution with Timer A off and Timer B on.

C3- Resume execution with Timers A and B on.

7.1.4 Run Command

The Run From Memory Location Command allows the user to

start program executio n fr om any point within the 1M port

space. This command takes the form Rxxxxn where “xxxxx”

denotes the 20-bit starting address. Valid characters for the

address field (xxxx) are 0-9 and A-F . The value n is either 0,1,2,

or 3 and is defined:

0 - Resume execution with Timers A and B halted.

1 - Resume execution with Timer A on and Timer B off.

2 - Resume execution with Timer A off and Timer B on.

3 - Resume execution with Timers A and B on.

8.0 UART Operation

The UT69R000 has an internal UART. Figure 29 shows a

diagram of the UT69R000 connected to a serial bus. The UART

operates at a fixed frequency of 9600 baud with eight bits, one

stop bit, and odd parity. The idle state for the UART is logic

zero. The TIMCLK input fixes the baud rate of the UART

(9600 baud at TIMCLK equal to 12 MHz). TIMCLK also

controls the frequency of the internal timers (TA and TB). The

status of the UART is read from the System Status Register

(STATUS) bits 7 through 0.

8.1 UART Transmitter Operation

The transmitter portion of the UT69R000’ s UAR T is a double-

buffered configuration consisting of a Transmitter Register and

a Transmitter Buffer Register. The Transmitter Register

contains the serial data stream the UT69R000 is currently

transmitting through the UART; the Transmitter Buff er

UART. The system programmer reads the status of the

Transmitter Register from bit 1 (TE) of the Status and the status

of the Transmitter Buffer Register from bit 2 (TBE) of the

Status Register. If bit 2 of the Status register is a logical one,

the UART transmitter buffer is ready for data, once loaded with

data, bit 2 transitions to a logical zero. Bit 1 is a logical zero

during serial transmission and transitions to a logical one when

transmission from the Transmitter Register is complete. The

Status register is read using Input Register Instruction INR

Rd,STATUS.

T o initiate a serial data transmission, the system designer must

first load the data to transmit into the Transmitter Buffer

This instruction loads the least significant byte of the source

automatically transfers the data word into the Transmitter

transition to a logical one indicating a ser ial tr ansm ission is

about to begin and the next data word can be loaded into the

Transmitter Buffer Register.

Figure 29. Serial Data Bus Interface to the UT 69R000

AND ODD PARITY

ONE STOP BIT

EIGHT DATA BITS,

9600 BAUD

SERIAL RS-232 BUS X0106-

RCVR

BUS

SERIAL

DRVR

BUS

SERIAL

UT69R000

FOR UART

12 MHz I/P

TIMCLK

UARTIN

UARTOUT

This double-buffering process allows transmitting contiguous

serial data streams. The process of alternately loading the

Transmitter Buffer Register with new data and then reading the

transmitter status from the STATUS register continues until

completion of all serial transmission. An example of UART

transmitter software follows:

WRITE_UART: INR R11, STATUS

TBR R11, 1DH

BR EQ, WRITE_UART

NOP

INR R15, TXMT

8.2 UART Receiver Operation

The UT69R000’s internal UART has one register associated

with the receive function. This register is the UART Receiver

Buffer Register (RBR). The least significant byte of the RCVR

contains the received serial data. The S tatus Register contains

error information about the serial data in the receiver. Four

error bits reflect information status, bit 7 (Receiver Error, RE),

which is the logical OR combination of the other three error

bits; bit 6 (Overrun Error, OE); bit 5 (Framing Error, FE); bit

4 (Parity Error, PE). An additional status bit for the Receiver

is the Data Ready (DR) bit. DR is the least significant bit of

the Status Register.

The UT69R000 is ready to receive serial data through the

internal UART, it must poll the Status Register to determine

when the Data Ready (DR) bit transitions from a logical zero

to logical one to signal the UART has indeed received a serial

transmission. When DR equals a logic one, the software reads

the Receiver by executing and Input Register Operation INR

RD, RCVR. The INR instruction takes the eight bits of received

data in the and places this data in the least significant byte of

the destination register (Rd) specified in the instruction.

When the UT69R000 is finished executing the Input Register

Instruction, the software can then determine the validity of the

message by testing the RE bit. After the software has checked

for a valid message, the data is stored. If the UT69 R000 is to

receive more data through the UAR T , the software must return

to polling the Status Register to determine the reception of the

next valid serial transm ission . T he Input Register Instruction

INR Rd, RCVR clears the DR bit. An example of receiver

software follows:

READ_UART: INR R11, STATUS

TBR R11, 1FH

BR EQ, READ_UART

NOP

OTR R15, RCVR 9.0

9.0 PROGRAMMING INTERFACE

9.1 Data Formats

The UT69R000 instruction set supports 16-bit integer sing le-

precision data and 32-bit integer double-precision data. All data

is in 2’s complement representation.

The UT69R000 represents the fixed-point data formats as a 2’ s

complement integer with the MSB as the sign bit (figures 30a

and 30b).

Operand Size

The UT69R000’ s instruction set supports three operand sizes:

(1) Byte (eight bits); (2) Word (16 bits); and (3) Long Word

(32 bit). Byte operands are only allowed with byte instructions.

All other instructions support word and long-word operands.

Organization of Data in General Purpose Registers

All 20 of the UT69R000’s general purpose data registers

support bit, byte, and word operations. When the system

programmer specifies a byte operation in a specific instruction,

the instruction expects to find the byte of Operand Data in th e

least significant eight bits of the data register. The least

significant bit of each of the data registers is bit 0 and the most

significant bit of each of the data registers is bit 15. Any one

of the data registers may be the source or destination for the

operand.

For long-word operands, the UT69R000 organizes the 20

general purpose data registers as 10 even/odd register pairs.

The even-numbered register of the register pair contains the

most significant word. All register pairs may be the source or

destination operands.

14 0

Figure 30a. Single-Precision Fixed-Point Data

Figure 30b. Double-Precision Fixed-Point Data

SIGN DATA

LSBMSB

SIGN

MSB LSB

(MSH) (LSH)

31 30 16 15 0

Special Purpose Data Registers

In addition to the 20 general purpose data registers, the

UT69R000 has three special purpose data registers: (1) The

ACCUMULATOR (ACC); (2) the Stack Pointer (SP); and (3)

the Instruction Counter Save Register (ICS).

The Accumulator (ACC) is a 32-bit register used only with

multiply, divide, extended shift, Load Register from

Instruction memory (LRI), and Store Register to Instruction

memory (STRI) instru ctions. For multiply instructions, th e

ACC retains the most significant half of the product, and for

divide instructions, the ACC retains the remainder. For LRI

and STRI instructions, the ACC contains the instruction

memory pointer. Note that the ACC can be used as a general

purpose register for most operations.

The Stack Pointer (SP) is a 16-bit register usable only with POP

and PUSH instructions.

The Instruction Counter Save (ICS) register is a 20-bit register

used during calls, jumps, and interrupts.

The UT69R000’ s instruction descriptions contain a definition

of the Register Transfer Language (RTL) that the Assembler

uses to describe how the instructions operate. The RTL

description of the UT69R000’ s internal registers is as follows:

RSn-- Source Register where n specifies the

RDn-- Destination Register where n specifies the

XRSn-- Long-Data Source Register where n specifies the

XRDn-- Long-Data Destination Regi ster where n specifies

the register number.

IC -- Instru ction Counter

SP -- Stack Pointer

ACC -- 32 bit Accumulator

ICS -- Instruction Counter Store Register

@RSn-- Data Register Indirect where n specifies the

@SP -- Stack Pointer Indirect

# -- Immediate Data

@# -- Immediate Data Indirect

9.2 Instruction Formats

The UT69R000 has three instruction formats (figure 32): (1)

All the UT69R000’s instruction s are either word (16-bit) or

long-word (32-bit) in length. The only time the UT69R000 uses

the long-word instruction format is for the Immediate Source

Operand Address Mode.

The bits in the instructions are defined as follows:

M: Instruction Mode Bit. When M = 1, the UT6 9R00 0

interprets the Instru ctio n Source field as a five-bit literal

value. If M = 0, the UT69R000 uses the Instruction Source

field to specify the source register for the instruction.

Opcode: This field is the five-bit opco de the UT69R000

uses to decode the instruction into a machine operation.

0459101415

Figure 31b. Register to-Short Immediate

0459101415

Figure 31a. Register to-Register Instruction

Figure 31c. Register Immediate Instruction Format

MSB LS

MODE OPCODE DESTINATION SOURCE

0 XXXXX RD RS

MODE OPCODE DESTINATION SOURCE

MSB LSB

1 XXXXX RD IMMEDIATE

MODE

MSB

OPCODE DESTINATION SOURCE

LSB

0 XXXXX RD 11111

0459101415

16-Bit Immediate Data

15 0

MSB LSB

Instruction Format

Destination: This field specifies the register the UT69R000

uses for the destination of the instruction.

Source: This field specifies the register the UT69R000 uses

for the Instru ction Source.

Immediate: If needed, this field contains the 16-bits of

immediate data the UT69R000 requires for the long-

immediate instruction.

9.3 Operand Addressing Modes

The UT69R000’s instruction set supports four basic addressing

modes. All instructions require a source operand and a

destination operand. The destination operand is a data register

(RDn or XRDn) for all instructions, except the Jump on

Condition (JC) instruction where the destination register

contains a template for the jump condition tested for in the

instruction. The source operand can be either a data register or

immediate data for all instructions.

The source operand can also be addressed in an indirect mode.

In an indirect addressing mode, the source data register or the

Stack Pointer contains an effective address. This address points

to the memory location for operand data the UT69R000 uses

during the current instruction execution. This type of memory

addressing is only used with the Load (LR), Store (STR),

PUSH, and POP instructions.

Destination Addressing Mode

The destination operand is given explicitly for all UT69R000

instructions. The UT69R000 encodes a five-bit field, bits 9

through 5, in each instruction as follows:

R0 -- 00000 XR0 -- 10000

R1 -- 00001 R16 -- 10001

R2 -- 00010 XR2 -- 10010

R3 -- 00011 R17 -- 10011

R4 -- 00100 XR4 -- 10100

R5 -- 00101 XR16 -- 10 110

R6 -- 10110

R7 -- 00111 XR8 -- 11000

R8 -- 01000 R18 -- 11001

R10 -- 01010 XR10 -- 11010

R11 -- 01011 R19 -- 11011

R12 -- 01100 XR12 -- 11100

R13 -- 01101 XR18 -- 11101

R14 -- 01110 XR 14 -- 11110

R15 -- 01111 AC C -- 11111

NUL -- 10111

Source Addressing Modes

The UT69R000 directly addresses the source operand by using

one of three normal modes: (1) Data Register Direct; (2)

Literal; and (3) Immediate Long Data.

Data Register Direct

When the UT69R000 uses the Data Register Direct mode, the

source operand is one of the data registers. The data register is

explicitly stated for all instructions. The UT69R000 encodes

a 5-bit field, bits 4 through 0, in each instruction as follows:

R0 -- 00000 XR0 -- 10000

R1 -- 00001 R16 -- 10001

R2 -- 00010 XR2 -- 10010

R3 -- 00011 R17 -- 10011

R4 -- 00100 XR4 -- 10100

R5 -- 00101 XR16 -- 10101

R6 -- 00110 XR6 -- 10110

R7 -- 00 111

R8 -- 01000 XR8 -- 11000

R9 -- 01001 R18 -- 11001

R10 -- 01010 XR10 -- 11010

R11 -- 01011 R19 -- 11011

R12 -- 01100 XR12 -- 11100

R13 -- 01101 XR18 -- 11101

R1 4 -- 0 1110 XR14 -- 11110

R1 5 -- 0 111 1 Re served -- 10111

and 11111

Literal

When the UT69R000 uses the Literal mode, the source operand

is a 5-bit literal data value. The UT69R000 explicitly states this

literal data value for the instructions. The UT69R000 encodes

a 5-bit field, bits 4 through 0, in each instruction as follows:

0 -- 00000 -16 -- 10000

+1 -- 00001 -15 -- 10001

+2 -- 00010 -14 -- 10010

+3 -- 00011 -13 -- 10011

+4 -- 00100 -12 -- 10100

+5 -- 00101 -11 -- 10101

+6 -- 00110 -10 -- 10110

+7 -- 00111 - 9 -- 10111

+8 -- 01000 - 8 -- 11000

+9 -- 01001 - 7 -- 11001

+10 -- 01010 - 6 -- 11010

+11 -- 01011 - 5 -- 11011

+12 -- 01100 - 4 -- 11100

+13 -- 01101 - 3 -- 11101

+1 4 -- 0 1110 - 2 -- 11110

+1 5 -- 0 1111 - 1 -- 11111

Immediate Long

When the UT69R000 uses the Immediate Long mode, the

source operand is a 16-bit data value. The UT69R000 explicitly

states this data for all instructions and encodes the 16-bit data

in a second 16-bit instruction word (figure 32). The UT69R000

encodes the 5-bit field of the instruction source field, bits 4

through 0, as follows:

IMM -- 11111

Special Source Operand Addressing Modes

In addition to its three direct addressing modes, the UT69R000

also supports three modes of indirect addressing: (1) Data

Data Register Indirect

When the UT69R000 uses the Data Register Indirect mode, the

source operand is a memory location addressed by the contents

of the specified data register. The data register is explicitly

stated for all instructions. This mode is only available on the

LR, STR, INR, and STR instructions. The UT69R000 encodes

a 5-bit field, bits 4 through 0, in each instruction as follows:

R0 -- 00000 XR0 -- 10000

R1 -- 00001 R16 -- 10001

R2 -- 00010 XR2 -- 10010

R3 -- 0001 1 R17 -- 10011

R4 -- 00100 XR4 -- 10100

R5 -- 00101 XR16 -- 10101

R6 -- 00110 XR6 -- 101 10

R7 -- 00 111

R8 -- 01000 XR8 -- 1 1000

R9 -- 01001 R18 -- 1 1001

R10 -- 01010 XR10 -- 11010

R11 -- 01011 R19 -- 11011

R12 -- 01100 XR12 -- 11100

R13 -- 01101 XR18 -- 11101

R1 4 -- 0 1110 XR14 -- 11110

R15 -- 01111 Reserved -- 10111

an d 11111

Stack Pointer Indirect

When the UT69R000 uses the Stack Pointer Indirect mode, the

source operand is a memory location addressed by the contents

of the Stack Pointer (SP) register. This mode is only available

with POP and PUSH instructions. The UT69R000 enco des a

5-bit field, bits 11 through 15, of each instruction when in the

Stack Pointer Indirect mode as follows:

SP -- 10 111.

Absolute

When the UT69R000 uses the Absolute mode, the source

operand is the memo ry location addressed by the contents of

the 16-bit immediate-data field accompanying the instruction.

This mode is only available on the LR, STR, INR, and OTR

instructions. The system programmer encodes the immediate

data field as a second 16-bit in st ruction word.

9.4 Data Movement Operations

The UT69R000 places no restrictions on operand size during

data movement. This means the size (Byte, Word, or Long

Word) of the data in the source and destination do not have to

match. The UT69R000 handles the data movement for all

instructions.

When a instruction specifies a word destination, a 16-bit result

is always stored in the destination. If the instruction specifies

a 5-bit literal source operand, then the UT69R000 sign-extends

this source data to produce a 16-bit operand. If the instruction

specifies a word-length source operand, there is no

manipulation of the source data. If the instruction specifies a

long-word source operand, the UT69R000 only retains the least

significant 16 bits of the r esult. The UT69R000 truncates the

most significant 16 bits of the result.

When a instruction specifies a long-word destination, a 32-bit

result is always stored in the destination. If the instruction

specifies a 5-bit literal source operand, then the UT69R000

sign-extends this source data to produce a 32-bit operand. If

the instruction specifies a word-length source operand, then the

UT69R000 also sign- extends this source data to produce a 32-

bit operand. If the instruction specifies a long-word-length

source operand, there is no manipulation of the source data.

When the system programmer specifies a byte instruction, the

UT69R000 only stores eight bits of the result regardless of

whether the instruction specifies a word or long-word

destination register.

Operation Code Matrix

The UT69R000 performs 30 basic operations, each with its

own operation code. All the UT69R000’s operations are

explicit, and are encoded in bits 14 through 10 of the

instruction.

10.0 PIN DESCRIPTION

Legend for TYPE and ACTIVE fields:

TO = TTL output

TI = TTL input

TUI = TTL input (pull-up)

TDI = TTL input (pull-down)

TTO = Three-state TTL output

TTB = T hr ee- s tate TTL bi dir ection al

CO = CMOS output

OSC = Oscillator input to a Pierce Oscillator

inverter

AH = Active High

AL = Active Low

OSCIN 50 P14 OSC

OSCILLATOR AND CLOCK SIGNALS

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

OSCOUT

SYSCLK

P15

M14

Oscillator In pu t. A 50% duty cycle crystal-drive input

for driving the UT69R000.

Oscillator Output. A 50% duty cycle, single-phase clock

output at the same frequency as the OSCIN input.

System Output. The buffered equivalent of the

OSCOUT signal.

NUI1 129 H2 TI

PROCESSOR STATUS

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

NUI2

NUO3

126

P12

TUI

TTO

Not used input 1. Internal UTMC use only. Tie either

high or low.

Not used input 2. Inter nal UTMC use only. Tie low.

Not used output 3. Internal UTMC use only. NUO3 enter

high impedance state when the UT69R000 is in the test

mode (TEST=0)

NUI3 45 N11 TDI -- Not used input 3. Inter nal UTMC use only. Tie low.

54 N15 TTO Processor State. This signal indicates the internal state

of the UT69R000. A low on STATE1 indicates the

UT69R000 is executing a new instruction. A high on

STATE1 indicates the UT69R000 is fetching an

instruction. STATE1 enters a high-impedance state

when the UT69R000 is in the test mode (TEST=0).

NUI4 61 K15 TUI Not used input 4. Internal UTMC use only. Tie high.

STATE1

NU01 115 C3 TTO Not used output 1. Internal UTMC use only.

NU02 113 A2 TTO Not used output 2. Internal UTMC use only.

118 D2 TTO

OPERAND DATA BUS ARBITRATION

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

119

120

TUI

Bus Request. The UT69R000 asserts this signal to indicate

it is requesting control of the Operand data bus (D0 - D15).

BRQ enters a high-impedance state when the UT69R000

is in the test mode (TEST = 0).

Bus Grant. When asserted, this signal indicates the

UT69R000 may take control of the Operand data bus. It is

tied to an internal pull-up resistor.

Bus Busy. A bus master asserts this input to inform the

UT69R000 that another bus master is using the Operand

data bus. It is tied to an internal pull-up resistor.

OPERAND DATA BUS CONTROL

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

121

112

TUI

TTO

Data Transfer Acknowledge. This signal tells the

UT69R000 that a data transfer has been acknowledged

and the UT69R000 can complete the bus cycle. To

assure the UT69R000 operates with no wait states,

DTACK can be tied low. DTACK is tied to an internal

pull-up resistor.

Memory or I/O. Indicates whether the current bus cycle

is for memory (high) or I/O (low). It remains in the high-

impedance state during bus cycles when the UT69R000

does not control the Operand buses.

117 B1 TTO AL

Bus Grant Acknowledge Output. The UT69R000 asserts

this signal to indicate it is the current bus master. When

low, BGACK inhibits other devices from becoming the

bus master. When the UT69R000 relinquishes control of

the bus, BGACK enters a high-impedance state.

114 C4 TTO Read/Write. Indicates the direction of data flow with

respect to the UT69R000. R/WR high means the

UT69R000 is attempting to read data from an external

device, and R/WR low means the UT69R000 is

attempting to write data to an external device. R/WR

remains in a high-impedance state when the UT69R000

does not control the Operand buses.

Continued on page 41.

BRQ

BGNT

BUSY

BGACK

DTACK

M/IO

R/WR

Output Enable Instruction Memory. This signal

allows memory to place data on the instruction data bus.

The Store Register to Instruction Memory (STRI)

instruction removes OE during the CK2 internal clock

cycle. OE enters a high-impedance state when the

UT69R000 is in the test mode (TEST = 0).

OPERAND DATA BUS CONTROL

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

116 B2 TTO Data Strobe. Indicates valid data is on the Operand Data

bus. The UT69R000 places DS in a high-impedance state

when it does not control the Operand buses.

42 R12 TTO

INSTRUCTION MEMORY CONTROL

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

43 R13 TTO Write Enable Memory. This signal allows the

UT69R000 to write to instruction memory. The Store

asserts WE during the CK2 internal clock cycle. WE

enters a high-impedance state when the UT69R000 is in

the test mode (TEST = 0).

Continued from page 40.

UART CONTROL/TIMER CLOCK

UARTIN 127 F1 TUI

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

UARTOUT 128 G1 TTO AH

AH UART Input. The UT69R000 receives serial data

through this input. The serial data is stored in the

UT69R000’s Receiver Buffer Register (RCVR). It is

tied to an internal pull-up resistor.

UART Output. The serial data stored in the UT69R000’s

Transmitter Buffer Register (TXMT) is transmitted

through this output. The UART output is fixed at 9600

baud, with eight data bits, odd-parity, and one stop bit.

UARTOUT enters a high-impedance state when the

UT69R000 is in the test mode (TEST=0). (9600 baud @

TIMCLK = 12 MHz)

Continued on page 42.

Test (Input). Asserting this input places the UT69R000

into a test mode. In this mode, all the UT69R000’s

outputs, except OSCOUT and SYSCLK, enter a high-

impedance state. When using TEST, the UT69R000

must have a MRST. MRST must be held active for at

least one SYSCLK period after TEST is deasserted to

assure proper operation (see figure 41b). TEST is tied

to an internal pull-up resistor.

TIMCLK 53 L13 TI

UART CONTROL/TIMER CLOCK

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

DI2 48 N12 TDI

Timer Clock. This 12 MHz clock input generates the baud

rate for the UT69R000’s internal UART. The input also

provides the clock for the UT69R000’s two internal timers

(TIMER A and TIMER B).

Discrete Input 2. Asserting this input sets bit 3 in the

System Status Register Bit 3 is read with the Input Register

Instruction (INR). Tied to an internal pull-down resistor.

(asynchronous input).

TEST 46 P13 TUI

DI1 49 N13 TDI -- Discrete Input 1. Asserting this input sets bit 8 in the

System Status Register. Bit 8 is read with the Input

resistor. (asynschronous input).

Continued from page 41

PROCESSOR MODE

OD0 104 B7 TTO

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

OD4 108 A4

-- Output Discrete Bus (OD(7:0)). These outputs reflect

the status of bits 0 through 7 of the Status/Output

Discrete Register. Write to this register using Output

impedance state when the UT69R000 is placed in the

test mode (TEST = 0).

OD1

OD2

OD3

105

106

107

OD5

OD6

OD7

109

110

111

Memory Parity (Error). Asserting this input indicates a

machine error. Bit 13 of the UT69R000’s Fault

circumstances should MCHNE2 be tied in its active

state. It is tied to an internal pull-down resistor. Interrupt

is not cleared via software until the negation of the input

signal.

MCHNE1 125 G2 TUI

INTERRUPTS/EXCEPTIONS

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

122 D1 TUI

System Fault. This positive edge-triggered input sets bit 8

(MCHNE1) in the UT69R000’s Fault Register. Under no

circumstances should MCHNE1 be tied in its active state.

It is tied to an internal pull-up resistor. Interrupt is not

cleared via software until the negation of the input signal.

MCHNE2

Bus Time Error. It is asserted when a bus error or a timeout

occurs. During I/O bus cycles, an active BTERR sets bit

10 of the Fault Register. During Memory bus cycles, an

active BTERR sets bit 7 of the Fault Register. Under no

circumstances should BTERR be tied in its active state. It

is tied to an internal pull-up resistor. Interrupt is not cleared

via software until the negation of the input signal.

124 F2 TDI

MPROT 123 F3 TUI AH Memory Protect Fault. When asserted, it informs the

UT69R000 that a memory-protect fault has occurred on the

Operand Data Bus. An access fault, a write-protect fault, or

an execute-protect fault causes a memory-protect fault. If the

UT69R000 is using the bus and MPROT is asserted, bit 15

of the Fault Register (CPU Fault) is set. If the UT69R000 is

not using the bus and MPROT is asserted, bit 14 of the Fault

resistor. Interrupt is not cleared via software until the

negation of the input signal.

56 M15 TUI

62 J15

User Interrupts. These interrupts are active on a negative-

going pulse and each will set, when active, its associated bit

in the Pending Interrupt Register. The interrupts are

maskable by setting the associated bits in the Interrupt Mask

tied to an internal pull-up resistor.

K13

K14

J14

J13

63 H14

55 L14 TUI AL Power Fail (Interrupt). Asserting this input

informs the UT69R000 that a power failure has occurred and

the present process will be interrupted. This input sets bit 15

in the Pending Interrupt Register. A Power Fail Interrupt (bit

15) cannot be disabled or masked. It is tied to an internal pull-

up resistor.

47 R14 TUI AL Master Reset. This input initializes the UT69R000 to a

reset state. The UT69R000 must be reset after power

(Vcc) is within specification and stable to ensure proper

operation. The system must hold MRST active for at

least one period of SYSCLK to assure the UT69R000

will be reset. It is tied to an internal pull-up resistor.

BTERR

INT0

INT1

INT2INT3

INT4

INT5

INT6

INT2

PFAIL

MRST

61 K15 TUI --

NUI4 Not used input 4. Internal UTMC use only. Tie high.

A0 84 A14 TTO

OPERAND BUSES

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

Address Bus - Operand. When asserted, this bus is

unidirectional and represents the Operand Address. The

bus is in the high-impedance state when the UT69R000

does not control the bus. A15 is the most significant bit.

The Operand Address enters a high-impedance state when

the UT69R000 is in the test mode (TEST = 0).

D0 64 H15 TTB Data Bus - Operand. This bidirectional data bus remains

in a high-impedance state when the UT69R000 does not

control the bus. D15 is the most significant bit. The

Operand Data Bus enters a high-impedance state when

the UT69R000 is in the test mode (TEST = 0).

RA0 18 R2 TTO Instruction Address Bus. This unidirectional bus represents

the address of the data in instruction memory. RA19 is the

most significant bit. The address enters a high-impedance

state only when the UT69R000 is in the test mode (TEST = 0).

A10

A11

A12

A13

A14

A15

102

103

B12

C11

A13

B11

A12

C10

B10

A10

D10

D11

D12

D13

D14

D15

G15

F15

G14

F14

F13

E15

D15

C15

D14

E13

C14

B15

D13

C13

B14

INSTRUCTION BUSES

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

RA1

RA2

RA3

RA4

RA5

RA6

RA7

RA8

RA9

RA10

RA11

RA12

RA13

RA14

RA15

R10

Continued on page 45.

RA16

RA17

RA18

RA19

P10

N10

R11

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

RD0 130 H1 TTB Instruction Data Bus. This bidirectional data bus is the

interface with the memory. RD15 is the most significant

bit. The Data Bus enters a high-impedance state only

when the UT69R000 is in the test mode (TEST = 0).

V34 H3 +5 V DC Power. Power supply input.

INSTRUCTION BUSES

PIN NAME PIN NUMBER

FLTPK PGA TYPE ACTIVE DESCRIPTION

Continued from page 44.

RD1

RD2

RD3

RD4

RD5

RD6

RD7

RD8

RD9

RD10

RD11

RD12

RD13

RD14

RD15

100

132

G13

H13

POWER AND GROUND

Reference Ground. Zero Volts DC, logic ground.

-- --

11.0 ABSOLUTE MAXIMUM RATINGS (1)

SYMBOL PARAMETER LIMITS UNIT

DC supply voltage

Voltage on any pin

DC input current

Storage temperature

Latchup immunity (2)

-0.3 to +7.0

-65 to +150

Maximum power dissipation

Maximum junction temperature

Thermal resistance, junction-to-case (3)

600

+175

-0.3 to VDD + .3

oC/W

(Referenced to VSS)

VDD

VI/O

TSTG

ILU

QJC

+150

+10

12.0 RECOMMENDED OPERATING CONDITIONS

SYMBOL PARAMETER LIMITS UNIT

DC supply voltage

Temperature range

4.5 to 5.5

-55 to +125

DC input voltage V

VDD

VIN

0 to VDD

Notes:

1. Stresses outside the listed absolute maximum ratings may cause permanent damage to the device. This is a stress

rating only, and functional operation of the device at these or any other conditions beyond limits indicated in the

operational sections of this specification is not recommended. Exposure to absolute maximum rating conditions for

extended periods may affect device reliability.

2. See discussion of test technique (figure 42).

3. Test per MIL-STD-883, Method 1012.

13.0 ELECTRICAL CHARACTERISTICS

VDD = 5.0V±10%; -55°C < TC < +125°C

Notes:

1. Supplied as a design limit but not guaranteed or tested.

2. Not more than one output may be shorted at a time for maximum duration of one second.

3. All inputs with internal pull-ups or pull-downs should be left open circuit, all other inputs tied low or high. TEST input pin asserted.

4. Includes current through input pull-ups. Instantaneous surge currents on the order of 1 ampere can occur during output switching. Voltage supply should be

adequately sized and decoupled to handle a large current surge.

5. Double buffer output pins (i.e., DS, R/WR, M/IO).

6. Functional tests are conducted in accordance with MIL-STD-883 with the following input test conditions: VIH=VIH(min)+20%,-0%; VIL=VIL(max)+0%,-50%,

as specified herein, for TTL or CMOS compatible inputs. Devices may be tested using any input voltage within the above specified range, but are guaranteed to

VIH(min) and VIL(max).

7. Radiation-hardened technology shall have a VIH pre-irradiation of 2.2V.

SYMBOL PARAMETER CONDITION MINIMUM MAXIMUM UNIT

VIL Low-level input voltage6

TTL inputs

OSC inputs

1.2 V

VIH High-level input voltage6

TTL inputs7

OSC inputs

2.0

3.6 V

IIN Input leakage current

Inputs without resistors

Inputs with pull-down resistors

Inputs with pull-up resistors

VIN = VDD or VSS

VIN = VDD

VIN = VSS

-10

-900

900

-80

µA

VOL Low-level output voltage

TTL outputs

OSC outputs

IOL = 3.2mA

IOL = 6.4mA Note 5

IOL = 0.1mA

0.4

1.0

VOH High-level output voltage

TTL outputs

OSC outputs

IOH = -0.4mA

IOH = -0.8mA Note 5

IOH = - 0.1mA

2.4

3.5

IOZ Three-state output leakage current VO = VDD or VSS -10

-20 Note 5

+10

+20 Note 5

µA

IOS Short-circuit output current 1,2 VDD = 5.5V, VO = 0V to VDD

-100

-200 Note 5

+100

+200 Note 5

CIN Input capacitance F = 1MHz @ 0V 10 pF

COUT Output capacitance F = 1MHz @ 0V 15 pF

CIO Bidirectional I/O capacitance F = 1MHz @ 0V 20 pF

IDD Average operating current1, 4 F = 16MHz, CL = 50pF

F = 12MHz, CL = 50pF

50 mA

QIDD Quiescent current Note 3 1mA

14.0 AC ELECTRICAL CHARACTERISTIC

Figure 32a. Typical Timing Measurements

to data valid

to high Z

to response

INPUT

to high Z

to data valid

to responseINPUT PARAMETER

SYMBOL

BUS

OUTPUT

OUT-OF-PHASE

OUTPUT

IN-PHASE

MAX

MIN

INPUT

MAX

MIN

MAX

MIN

MAX

*Unless otherwise noted, all AC electrical characteristics are guaranteed by design or characterization.

Note:

50pF including scope

probe and test socket.

90%

Figure 32b. AC Test Loads and Input Waveforms

Input Pulses

10%10%

90%

< 2 ns < 2 ns

50 pF

3 V

0 V

5 V

•

IREF (source)

IREF (sink)

VREF

ns330

Figure 33. I/O Read Cycle

Note:

--0

OSCIN high to address invalid

134ut34t

t34s

t34r

t34n

t34m

t34l

t34j

t34i

t34k

t34h

t34g

t34f

t34b

t34a

VALID

DATA

VALID

ADDRESS

OSCIN

OPERAND

DATA

OPERAND

ADDRESS

SYMBOL PARAMETER MIN MAX UNITS

t34a

t34b

Data setup time

Data hold time

t34f

t34g

t34h

t34i

t34j

t34k

t34l

t34m

t34n

t34r

t34s

t34t

t34u ns

*Guaranteed by test.

16 MHz

420

--0

MIN MAX

12 MHz

STATE1

R/WR

M/IO

OSCIN low to STATE1 high

OSCIN low to STATE1 low

OSCIN low to DS inactive

OSCIN low to DS active

OSCIN high to DS inactive

OSCIN low to DS high Z

OSCIN low to R/WR active

OSCIN low to R/WR high Z

OSCIN low to M/IO low

OSCIN high to M/IO high

OSCIN low to M/IO high Z

OSCIN low to address valid

ns330

Figure 34. I/O Write Cycle

480

OSCIN high to address invalid

OSCIN low to address valid

t35ut35t

t35s

t35r

t35n

t35m

t35l

t35j

t35i

t35k

t35h

t35g

t35f

t35b

t35a

VALID

ADDRESS

OSCIN

OPERAND

DATA

OPERAND

ADDRESS

t35a

t35b

OSCIN low to data valid

OSCIN high to data invalid (high Z)

t35f

t35g

t35h

t35i

t35j

t35k

t35l

t35m

t35n

t35r

t35s

t35t

t35u 540t35v

t35v

VALID

DATA

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

420

640

-- 720

OSCIN low to STATE1 high

OSCIN low to STATE1 low

OSCIN low to DS inactive

OSCIN low to DS active

OSCIN high to DS inactive

OSCIN low to DS high Z

OSCIN low to R/WR inactive

OSCIN low to R/WR high Z

OSCIN low to M/IO low

OSCIN high to M/IO high

OSCIN low to M/IO high Z

OSCIN high to R/WR high

STATE1

R/WR

M/IO

ns330

Figure 35. Operand PortRead Cycle

Note:

--0

OSCIN high to address invalid

OSCIN low to address valid

t36u

t36t

t36s

t36r

t36n

t36l

t36j

t36i

t36k

t36h

t36g

t36f

t36b

t36a

VALID

DATA

VALID

ADDRESS

OPERAND

ADDRESS

t36a

t36b *

Data setup time

Data hold time

t36f

t36g

t36h

t36i

t36j

t36k

t36l

t36n

t36r

t36s

t36t

t36u

*Guaranteed by test.

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

0420

--0

OSCIN

OPERAND

DATA

OSCIN low to STATE1 high

OSCIN low to STATE1 low

OSCIN low to DS inactive

OSCIN low to DS active

OSCIN high to DS inactive

OSCIN low to DS high Z

OSCIN low to R/WR inactive

OSCIN low to R/WR high Z

OSCIN low to M/IO high

OSCIN low to M/IO high Z

STATE1

R/WR

M/IO

ns330

Figure 36. Operand Port Write Cycle

Note:

480

t37ut37t

t37s

t37r

t37n

t37l

t37j

t37i

t37k

t37h

t37g

t37f

t37b

t37a

VALID

ADDRESS

OSCIN

OPERAND

DATA

OPERAND

ADDRESS

t37a

t37b *

t37f

t37g

t37h

t37i

t37j

t37k

t37l

t37n

t37r

t37s

t37t

t37u 540t37v

t37v

VALID

DATA

*Guaranteed by test.

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

0420

640

-- 720

OSCIN high to address invalid

OSCIN low to address valid

OSCIN low to data valid

OSCIN low to STATE1 high

OSCIN low to STATE1 low

OSCIN low to DS inactive

OSCIN low to DS active

OSCIN high to DS inactive

OSCIN low to DS high Z

OSCIN low to R/WR active

OSCIN low to R/WR high Z

OSCIN low to M/IO high

OSCIN low to M/IO high Z

STATE1

R/WR

M/IO

OSCIN high to data invalid (high Z)

OSCIN high to R/WR high

330 ns

Notes:

t38a 0

OSCIN

OPERAND

DATA

OPERAND

ADDRESS

t38a

t38b

t38c t38d

t38g

t38h

t38i

t38j

t38l

VALID

DATA

VALID

ADDRESS

t38b

t38c

t38d

t38e

t38f

t38g

t38h

t38i

t38j

t38k

t38l

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

420

t38e

OSCIN low to STATE1 high

OSCIN low to STATE1 low

OSCIN high to BRQ low

BGT setup time

OSCIN low to BGACK active

DTACK setup

STATE1

R/WR

M/IO

t38f

t38k

*Guaranteed by test.

1.BGT must be active and BUSY high at this clock edge or wait states will occur.

2.To avoid wait states, DTACK must be active here.

DTACK

BGACK

BGNT

BRQ

BUSY

OSCIN low to BRQ high

BGT hold time

OSCIN low to BGACK high Z

DTACK hold time

BUSY setup

BUSY hold time

Figure 37. DMA No Wait State

Must have BGNT active here

for no wait states Must have DTACK active here

for no wait states

t39j

t39ht39g

t39f

t39e

t39d

t39c

t39b

t39a

VALID

DATA

VALID

ADDRESS

DATA

INSTRUCTION

ADDRESS

INSTRUCTION

Figure 38. STRI Command Timing

OSCIN

t39a 0

t39i

Note:

t39b

t39c

t39d

t39e

t39f

t39g

t39h

t39i

t39j

*Guaranteed by test.

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

STATE1

OSCIN low to STATE1 low

OSCIN low to STATE1 high

OSCIN high to OE high

OSCIN high to WE low

OSCIN low to address valid

OSCIN low to OE low

OSCIN high to WE high

OSCIN low to address high Z

OSCIN high to data valid

OSCIN low to data high Z

Figure 39. LRI Command Timing

t40a

t40j

t40i

t40h

t40g

t40f

t40e

t40d

t40c

t40b

t40a

VALID

DATA

VALID

ADDRESS

DATA

INSTRUCTION

ADDRESS

INSTRUCTION

OSCIN

t40b

t40c

t40d

t40e

t40f

t40g

t40h

t40i

t40j

*Guaranteed by test.

Note:

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

OSCIN low to STATE1 low

OSCIN low to STATE1 high

OSCIN high to OE low

OSCIN high to WE high

OSCIN low to address valid

OSCIN low to OE high

OSCIN low to WE low

OSCIN low to address high Z

Data setup time

Data hold time

STATE1

Figure 40. UART and Timer A/B TIMCLK Timing

t41bt41a

TIMCLK high time

TIMCLK low time

t41b

t41a

TIMCLK

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

MRST Pulse Width

t62 ns

Figure 41a. Master Reset Timing

83 nst

42a

42b

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

SYMBOL PARAMETER MIN MAX UNITS

16 MHz

MIN MAX

12 MHz

-- --

----

MRST

TEST

MRST Timing with TEST active

Figure 41b. Master Reset Timing when TEST is Active

LATCHUP TEST CONFIGURATIONS

Figure 42 shows the latchup test. VDD holds at +5.5 VDC, and

VSS holds at ground. The device test is at 125 C. Each type of

I/O alternately receives a positive and then negative 150 mA

pulse of 500 ms duration. The current is monitored after the

pulse for latchup condition. To prevent burnout, the supply

current is limited to 400 mA.

The UT69R000AR has latchup immunity in excess of +150

mA for 500 ms.

500ms

150mA

-150mA

PULSE

GENERATOR

CURRENT

METER

POWER

SUPPLY

INPUT OR

OUTPUT

GND

DUT

VDD

Figure 42. Latchup Test

15.0 PACKAGING

Figure 43. 144-Pin Pingrid Array

Notes:

1. Package material: Opaque ceramic.

2. True position applies at base plane (Datum C).

3. True position applies at pin tips (Datum C1).

4. All package finishes are per MIL-PRF-38535.

5. Letter designations are for cross-reference MIL-STD-1835.

6. Geometry of index mark cannot be an alpha or numeric

symbol.

7. All VDD pads are connected to the power plane, die-attach,

pad and external pins H3, N9, G13, and C7.

8. All VSS pads are connected to the power plane, die-attach,

pad and external pins J3, N8, H13, and C8.

Pin Usage: PGA

113 - I/O

8 - Power/Ground

23 - No connect (B13, C2, C3,

N14, P3, R1, D3, D4, M13,

A15, E1, A1, A2, L2, N4, R5,

B5, P11, A11, C12, E14, R15,

L15)

Notes:

1. All package finishes are per MIL-PRF-38535.

2. Lead numbers 34, 67, 100, 132 are connected to the VDD

plane. Other leads can be used for VDD connections.

3. Lead numbers 33, 66, 99, 1 are connected to the VSS

plane. Other leads canbe used for VSS connections.

4. The lid is connected to VSS.

5. Letter designations are for cross-reference to MIL-STD-1835.

Figure 44. 132-Lead Flatpack (Unformed Leads)

Pin Usage: FLTPK

113 - I/O

8 - Power/Ground

8 - No connect (2,

32, 35, 65, 68, 98,

101, 131)

Notes:

1.All package finishes are per MIL-PRF-38535.

2. Lead numbers 34, 67, 100, 132 are connected to the V

plane.

3. Lead numbers 1, 33, 66, 99 are connected to the VSS

plane. Other leads canbe used for VSS connections.

4. The lid is connected to VSS.

5. Letter designations are for cross-reference to MIL-STD-1835.

Figure 45. 132-Lead Flatpack (non-conductive Tiebar)

16.0 ORDERING INFORMATION

69R000 Microcontroller

Total Dose:

- = None

(F) =3E5 rads(Si)

(G) =5E5 rads(Si)

(H) =1E6 rads(Si)

(R) =1E5 rads(Si)

Lead Finish:

(A) = Solder

(X) =Optional

Screening:

(P) =Prototype

Package Type:

(G) =144-pin CPGA

(W) =132-pin Flatpack (Gold only)

(F) =132-pin Flatpack w/NCS

Access Time:

(12) = 12MHz operating frequency

(16) = 16MHz operating frequency

UTMC Core Part Number

UT69R000 * * * * *

Notes:

1. Lead finish (A, C, or X) must be specified.

2. If an “X” is specified when ordering, part marking will match the lead finish and will be either “A” (solder) or “C” (gold).

3. Military Temperature range flow per UTMC’s manufacturing flows document. Devices are tested at -55°C,

room temperature, and 125°C. Radiation neither tested nor guaranteed.

4. Prototype flow per UTMC Manufacturing Flows. Devices have prototype assembly and are tested at 25°C only.

.Lead finish is gold only. Radiation is neither tested nor guaranteed.

5. 132 pin FP (package designator "W") only available with gold lead finish.

69R000 Microcontroller: SMD

Lead Finish:

(A) = Solder

(X) =Optional

Case Outline:

(X) =144-pin PGA

(Y) =132-pin Flatpack (Gold only)

(Z) =132-pin Flatpack w/NCS

Class Designator:

(Q) =Class Q

(V) =Class V

Device Type

(01) = 12 Mhz, RH microcontroller

(02) = 16 Mhz, RH microcontroller

Drawing Number: 98552

Total Dose:

(-) = None

(H) = 1E6 rads(Si)

(G) =5E5 rads(Si)

(F) =3E5 rads(Si)

(R) =1E5 rads(Si)

Federal Stock Class Designator: No options

5962 * 98552 01 * * *

Notes:

1. Lead finish (A, C, or X) must be specified.

2. If an “X” is specified when ordering, part number will match the lead finish and will be either “A” (solder) or “C” (gold).

3. 132 FP (package designator "Y") only available with gold lead finish.

Attachment 1

Creation Date: 2/16/05 Page 1 Modification Date: 3/4/05

UT69R000 Console Command Register ID Numbers

To better assist you in programming the Modify Register command for the UT69R000 this table lists the Register IDs that the

UT69R000 recognizes.

Console Command

R10

R11

R12

R13

R14

R15

ID NUMBER

(HEX)

DISCON

DISCOFF