A2SI-ST - ZMD AG - Pdf.Support

Data Sheet, Rev. 2.4, March 04, 2002 1/31

A²SI

Advanced AS-Interface IC

RECEIVE

TRANSMIT

ELECTRONIC

INDUCTOR

POWER

SUPPLY OSCILLATOR

DIGITAL

LOGIC

THERMAL

PROTECTION

A2SI

GND2 GND1

ASI+

ASI–

8 MHz

DOx

DIx

DSR

PST

FIDLEDIRDGND0V

UIN UOUT U5R U5RD OSC1/2

CAP

SIP

SIN

2.2

24V

POWERFAIL

DETECTION

IRD

CCAP

RCAP

1 Features

· AS-i Complete Specification V2.11 compliant

· Integrated EEPROM

· Additional addressing channel using an opto-electronic interface

· Extended address mode operation as programmable option (up to 62 slaves)

· High impedance AS-i line input, additional pins for further impedance optimizations

· DC voltage output, approximately 24 volts, not stabilized

· 5 volt DC voltage output, stabilized, CMOS logic can be supplied directly (e.g. µC)

· LED status indicator output (compliant with the standard indication recommendation)

· Integrated watchdog

2 Description

A²SI is a monolithic CMOS integrated circuit certified for AS-i (Actuator Sensor-interface) networks. AS-i

networks are intended for industrial automation.

The main advantage of AS-i solutions is that actuators and sensors are connected using a two-wire unshielded

cable that is easy to install. This cable transports both power and information/data.

AS-i network communication is based on the master-slave principle. The network can be extended (to cable

lengths greater than 100m) by using the A²SI in the repeater mode configuration.

AS-i is a standard for the automation industry based on IEC 62026-2 and EN 50295.

The device is available in a 28-pin SSOP package.

3 Block Diagram

Figure 1: Block Diagram

Data Sheet, Rev. 2.4, March 04, 2002 2/31

A²SI

Advanced AS-Interface IC

4 Pin Description

Table 1: Pin Description

PIN # Name Type Description

1 ASIP INOUT To be connected to the AS-i-line ASI+ via reverse polarity protection diode

2 ASIN INOUT To be connected to the AS-i-line ASI-

3 0V SUPPLY Common 0V for all ports except ASIP/ASIN (to be connected to ASI- line)

4 IRD IN Addressing channel input

5 FID IN Input peripheral fault indication

6 OSC2 INOUT Crystal oscillator (8 MHz x-tal)

7 OSC1 IN Crystal oscillator / external clock input

8 DO3 OUT Output of data D3

9 DO2 OUT Output of data D2

10 DO1 OUT Output of data D1

11 DO0 OUT Output of data D0

12 GND SUPPLY Digital IO ground, must be connected to pin 0V

13 P3 I/O Input/output of parameter P3

14 P2 I/O Input/output of parameter P2 / receive strobe in ”Master Mode”

15 P1 I/O Input/output of parameter P1 / power fail in ”Master Mode”

16 P0 I/O Input/output of parameter P0 / data clock in ”Master Mode”

17 DI0 IN Input of data D0

18 DI1 IN Input of data D1

19 DI2 IN Input of data D2

20 DI3 IN Input of data D3

21 PST OUT Parameter strobe output

22 DSR I/O Data strobe output/reset input

23 U5RD SUPPLY Digital 5V supply input, should be connected to U5R

24 LED OUT Output LED "AS-i-Diagnosis" / addressing channel output

25 CAP IN/OUT For connection of external RC components

26 U5R OUT Internal 5V supply that might be used to supply external circuits as well

27 UOUT OUT Supply of external circuitry (e.g. sensor, actuator, etc.), approx. VUIN minus 7

volt

28 UIN SUPPLY Input of the power supply block (usually to be connected to the AS-i-line ASI+

via reverse polarity protection diode)

Data Sheet, Rev. 2.4, March 04, 2002 3/31

A²SI

Advanced AS-Interface IC

5 Pin Configuration

Figure 2: Pin Configuration, 28-Pin SSOP

6 Functional Block Description

6.1 Power Supply

An on-chip electronic inductor provides a de-coupled voltage at pin UOUT and the power supply regulates the

internal 5V operating voltage. The de-coupling circuit (electronic coil) is connected between UIN and UOUT pins

and guarantees a high impedance seen at UIN. An external capacitor and resistor are required to allow a low-

pass filter with a very high time constant. This high time-constant value is necessary to maximize the input

impedance. The de-coupling circuit limits the current that can be drawn from UOUT. The power supply will shut

down the de-coupling circuit in case of an overload condition to prevent a total malfunction of the complete AS-i

line. The regulated 5 volt supply voltage is connected to pin U5R. Two external capacitors are necessary to

cope with fast internal and external load changes (spikes). Current drawn from pin U5R (up to 4 mA) has to be

subtracted from the total load current. The power supply circuit dissipates the major amount of power.

The total power dissipation shall not exceed the specified values of Figure 6. The ground reference voltage for

both UOUT and U5R is defined by the 0V pin. This pin must be connected to ASI- (ref. Figure 1).

6.2 Receiver

The receiver detects signals on the AS-i line and delivers the appropriate pulses to the digital logic. The DC

value of the input signal is removed and the AC signal is band-pass filtered. The digital output signals are

extracted from the sin2-shaped input pulses by a set of comparators. The maximum voltage of the first negative

pulse determines the threshold level for all following pulses. The maximum value is digitally filtered to guarantee

stable conditions (burst spikes have no effect). This approach combines a fast adaptation to changing signal

amplitudes with a high detection safety. The receiver delivers positive (P-PULSE) and negative (N-PULSE)

pulses to the IC's logic. The logic resets the comparators after receiving the REC-RESET signal. When the

receiver is turned on, the transmitter is turned off to reduce power consumption.

ASIP

ASIN

IRD

FID

OSC2

OSC1

DO1

DO3

DO2

GND

P2 P1

UIN

UOUT

U5R

CAP

LED

U5RD

DSR

PST

DI3

DO0

DI2

DI1

DI0

A2SI

Data Sheet, Rev. 2.4, March 04, 2002 4/31

A²SI

Advanced AS-Interface IC

6.3 Transmitter

The transmitter draws a modulated current between ASIP and ASIN pins to generate the communication

signals. The shape of the current corresponds to the integral of a sin2-function. The transmitter uses a current

DAC and a high current driver. In order to activate high current drive capability, a small current will be turned on

automatically prior to each transmission (slave mode only). The current will be ramped up slowly to avoid false

voltage pulses on the AS-I line. The amount of circuitry between ASI+ and ASI- pins is minimized to allow high

impedance values. When the transmitter is turned on, the receiver is turned off to reduce power consumption.

6.4 Digital Logic

The digital logic block performs analysis of the received signal, controls reaction of the IC, transmits slave

response, switches I/O-ports, and controls the internal EEPROM. Its principal function is described in detail in

section 7.

6.5 Protection Circuitry

The device has several protection cells that prevent disruption and malfunction of the complete AS-i line.

The thermal detection shuts down the power supply in case of over-heating condition (silicon temperature

> 140°C typically for more than 2 seconds) and when UOUT is shorted to GND for more than 2 seconds. The

device can only be reactivated by a power-on reset. An over-heating condition can occur by overloading any

output pin. Therefore, the circuit monitors the operating conditions of the power supply (effectively monitors

UOUT) and measures the temperature of the silicon.

6.6 Infrared Diode Input

The photo current input can be used as an alternative communication pin in slave mode. The IRD circuitry will

be turned off when the communication has been switched to AS-i line. In Slave mode the logic sets IRD input to

photo-detector mode and disables CMOS mode. In this photo-detector mode, signals of an external photo diode

are amplified. In CMOS mode (master/repeater mode only), input signals have to be CMOS levels between 0V

and VU5R.

6.7 Power-Fail Detection

The power-fail detector consists of a comparator that generates a logic signal in case the power supply drops

below 22VDC (Power-Fail) for a time of more than tLoff (0.8 ± 0.1 ms). The power fail signal will be presented at

pin P1 in master mode only.

Power-fail detection monitors the value of the ASIP voltage. It will activate a logic signal if power fails for more

than 1ms. The device is then buffered by the external capacitor at UOUT and the internal circuitry will be reset

when U5R supply voltage fails

Data Sheet, Rev. 2.4, March 04, 2002 5/31

A²SI

Advanced AS-Interface IC

RECEIVE

TRANSMIT

POWERFAIL

DETECTION

POWER

SUPPLY OSCILLATOR

DIGITAL

LOGIC

THERMAL

PROTECTION

A2SI

GND2 GND1

DO(3:0

)

DI(3:0)

DSR

PST

P(3:0)

FIDLEDIRDGND

UIN UOUT U5R U5RD OSC1/2

CAP

ASIP

ASIN

OVER-HEAT

P-PULSE

N-PULSE

REC-RESET

SEND-D

SEND-SBY

POWER-FAIL

POWER-ON

RESET

UOUT

SHUT-DOWN

CLK

OUTPUT

STAGE

INPUT

STAGE

I/O

STAGE

OUTPUT

STAGE

INPUT

STAGE

OUTPUT

STAGE

OUTPUT

STAGE

INPUT

STAGE

CMOS

INPUT

STAGE

Current

INPUT

DATA-OUT

DATA-IN

DATA-S TRB

RESET

PARAM

STRB

PARAM

OUT

LED

OUT

FAULT

IRD In

Logic

ELECTRONIC

INDUCTOR

Figure 3 : Functional Block Diagram

Data Sheet, Rev. 2.4, March 04, 2002 6/31

A²SI

Advanced AS-Interface IC

7 Description of Digital Logic

The digital logic is structured in four (4) parts (see Figure 4):

1) the UART, which analyses the incoming signal from the AS-i line and ensures correct timing of output

signals;

2) the STATE MACHINE, which controls the reaction of the IC;

3) the PORTS, which contain registers and digital I/O’s;

4) and finally the E²PROM, which contains the non-volatile data of the A2SI circuit.

DATA-OUT-0

DATA-OUT-1

DATA-OUT-2

DATA-OUT-3

DATA-STRB

RESET

DATA-IN-0

DATA-IN-1

DATA-IN-2

DATA-IN-3

PARAM-OUT-0

PARAM-OUT-1

PARAM-OUT-2

PARAM-OUT-3

PARAM-STRB

PARAM-IN-0

PARAM-IN-1

PARAM-IN-2

PARAM-IN-3

IRD-IN

FAULT-IN

LED-OUT

OVER-HEAT

UOUT SHOUTDOWN

PORTS

DO-REG -0

DO-REG -1

DO-REG -2

DO-REG -3

DI-R

EG -0

DI-R

EG -1

DI-R

EG -2

DI-R

EG -3

PO-REG -0

PO-REG -1

PO-REG -2

PO-REG -3

PI-0

PI-1

PI-2

PI-3

E2PROM

STATE MACHINE

REC -REG -0

REC -REG -1

REC -REG -2

REC -REG -3

REC -REG -4

REC -REG -5

REC -REG -6

REC -REG -7

REC -REG -8

REC -REG -9

REC -REG -10

REC -STRB

SEND -REG-0

SEND -REG-1

SEND -REG-2

SEND -REG-3

SEND -STRB

ADD-CLK

ADD-OUT

ADD-IN

P-PULSE

N-PULSE

SEND-D

SEND-SBY

REC-RESET

Digital Logic

POWER-FAIL

POWER-ON RESET

P-Pulse

UART

Figure 4: Digital Logic

Data Sheet, Rev. 2.4, March 04, 2002 7/31

A²SI

Advanced AS-Interface IC

7.1 Operational Modes

7.1.1 Master/Repeater Mode

7.1.1.1 IRD Input (CMOS Input)

The IC sends signals retrieved from pin IRD to AS-i line as an AS-i telegram. The input signal is Manchester-

coded and active low. A falling edge of the IRD signal, which is conducted to ADD-IN, starts the receiving

process and triggers the Activity-Checker. Receive-Muxer selects pin IRD as input for the receive data

The IRD signal is connected with Send-Muxer to SEND-D via ADD-IN. The IRD signal is latched every 500 ns

as long as there is activity on the input pin. If there is a high level on the IRD input longer then 7.0 µs, Activity-

Checker will recognize this as no activity and Receive-Muxer is returning to idle state. The information on pin

IRD is transported to pin SEND-D with a delay of 2.0 µs up to 2.5 µs. The sender is always in non-standby

mode. The SEND-SBY signal is constant low and there is no generation of ADD-CLK.

REC-REG-0

REC-REG-1

REC-REG-2

REC-REG-3

REC-REG-4

REC-REG-5

REC-REG-6

REC-REG-7

REC-REG-8

REC-REG-9

REC-REG-10

UART

SEND-REG-0

SEND-REG-1

SEND-REG-2

SEND-REG-3

RECEIVE

SEND

MUXER

SEND-D

ADD-OUT

RECEIVE

MUXER

MAN CODE

CHECKER

CONTROL

UNIT

PULSE

ENCODER

CTIVIT

CHECKER

SEND

STROBE

UNIT

P-PULSE

N-PULSE

ADD-IN

SEND-STRB

REC-STRB

ADD-CLK

SEND-SBY

REC-RESET

Figure 5: UART Block Diagram

Data Sheet, Rev. 2.4, March 04, 2002 8/31

A²SI

Advanced AS-Interface IC

7.1.1.2 AS-i Input

A signal on the AS-i-line generates signals at the receiver output that are pulse coded with a minimal pulse

width of 750 ns up to 875 ns. A pulse on the AS-i line starts the receiver and triggers the Activity-Checker

through N-PULSE or P-PULSE. The Receive-Muxer selects AS-i-line pins as input for the receive data. The N-

PULSE and P-PULSE signals are latched every 250 ns as long as there is activity on the input pins. If there is a

pulse distance on the AS-i-line inputs longer then 7.0 µs, the receiver will recognize this as no activity and the

Receive-Muxer is going to the idle state.

The Pulse-Encoder is used to convert the active high pulse-coded signal to a active low Manchester-II-coded

(MAN) signal. It will also check the pulse stream for timing and pulse errors (e.g. alternation error). In

Master/Repeater mode the Pulse-Encoder additionally resynchronizes an error-free MAN telegram into a proper

3 µs time base. This is to eliminate the pulse jitter of the transformed AS-i telegram. The synchronized MAN

signal is sent to ADD-OUT through the Send-Muxer. ADD-OUT is connected to LED-OUT on a higher hierarchy

level. All in all, information on the AS-i-line pins is transported to pin LED-OUT with a delay of 2.5 µs up to

3.0 µs. In Master/Repeater mode the sender is never in standby mode, hence SEND-SBY signal is always low.

A generation of ADD-CLK is provided to simplify external processing of Manchester-coded data. The rising edge

of the ADD-CLK signal is in the middle of the second half of the Manchester data assuring that correct binary

data can be clocked into a shift register. The ADD-CLK starts with a rising edge 2.0 µs after the falling edge of

the start bit at ADD-OUT with a period of 6.0 µs and a ratio of 1:1. The last rising edge of the ADD-CLK signal

occurs 2.0 µs after the falling edge of the end bit at ADD-OUT.

If the received signal in the Master Mode is a valid slave answer with start bit, four (4) data bits, parity, and end

bit and if a pause is following with a length greater than 6.0 µs, the UART generates the active high REC-STRB

signal with a pulse width of 500 ns. The REC-STRB signal is connected to the P2 Parameter Output in this

mode. It appears 10.0 to 10.5 µs after the rising edge of the end bit on AS-i-line.

7.1.1.3 Ports

Functional assignments of some IC ports depend on the operational mode of the IC. Thus, these ports perform

multiple functions that are related to a particular mode of the IC.

In Master Mode, following signals and ports are connected:

PIN Slave Function Master Repeater

P0 Parameter output

port bit 0

REC-CLK REC-CLK

P1 Parameter output

port bit 1

POWER-

FAIL

P2 Parameter output

port bit 2

REC-STRB -

LED LED

Fault indicator

output/addressing

channel output

MAN-OUT MAN-OUT

IRD Addressing

channel input

MAN-IN MAN-IN

Data Sheet, Rev. 2.4, March 04, 2002 9/31

A²SI

Advanced AS-Interface IC

7.1.2 Slave Mode

After IC-reset, Receive-Muxer is watching the two input channels (AS-i-line and IRD pin) depending on a

multiplex select signal MPX. MPX has a frequency of about 1.0 kHz. If MPX is low, the Receive-Muxer selects

the AS-i-line and vice versa if it is high, it selects the IRD pin as data input. The channel, from which a valid

master call is received first, will be locked until the next IC-reset occurs.

7.1.2.1 IRD Input Mode (Photo Diode Input)

The photo diode current on the IRD input is Manchester-coded and low active (ref. 8.2.2 Addressing Channel

Input IRD). A low level of the IRD signal starts the receiver and triggers the Activity-Checker. The Control-Unit is

enabling the Receive-Register and the received information is clocked every 6 µs into the Receive-Register. If

there is a high level on the IRD input longer then 7.0 µs, the Control-Unit will recognize this as no activity and

the Receive-Register will be disabled. If the received information is a correct master call with Start-Bit, eleven

Data-Bits, Parity-Bit, End-Bit, and following pause of either greater than 6.0 µs (Synchronous Mode) or 18.0 µs

(Asynchronous Mode), the UART generates the internal active high REC-STRB signal with a pulse width of

500 ns.

If the received telegram contained an error, the Control-Unit will not generate the REC-STRB signal but go to its

asynchronous state waiting for a pause at the IRD input. After a pause was detected, the UART is ready to

receive the next telegram from the IRD input.

If a REC-STRB signal is generated, it occurs 9.5 µs up to 10.0 µs (Synchronous Mode) or 21.0 µs up to 21.5 µs

(Asynchronous Mode), respectively, after the rising edge of the End-Bit on the IRD pin signal. If the slave was in

asynchronous state, it now transforms to synchronous state. The Rec-Muxer is locked to the IRD input until the

next IC-reset. After the generation of a REC-STRB signal the Control-Unit is waiting for about 6.0 µs for the

SEND-STRB to be generated by the Main-State-Machine.

If the Control-Unit receives the active high SEND-STRB signal, it starts the transmission of the Send-Register

data. Therefore, the Send-Register data will be converted to an active low Manchester II-coded (MAN) signal

which is sent to the LED-OUT pin via ADD-OUT. The first falling edge of the MAN signal occurs 11.75 µs

(Synchronous Mode) or 12.25 µs (Asynchronous Mode) after the rising edge of the REC-STRB signal. Hence,

the delay from the rising edge of the End-Bit of the master call (IRD input) to the first falling edge of the slave

response (LED output) is 21.25 to 21.75 µs (Synchronous Mode) or 33.25 to 33.75 µs (Asynchronous Mode).

After the pause was detected, the UART is ready to receive the next telegram from the IRD input.

In case the Control-Unit will not receive a SEND-STRB signal within the given time frame (for instance, if this

slave was not addressed), it will check for activity on the IRD input. Otherwise, it will just wait for the end of the

response time (60 µs). In both cases the Control-Unit stays synchronous. Once a slave pause was detected, the

UART is ready to receive the next telegram from the IRD input

7.1.2.2 AS-i Input Mode

A signal on the AS-i-line generates two pulse-coded signals (N-PULSE, P-PULSE) at the receiver output with a

minimum pulse width of 750 to 875 ns. A pulse on the AS-i line starts the receiver and triggers the Activity-

Checker through N-PULSE or P-PULSE.

The Pulse-Encoder is used to convert the active high pulse coded signal to an active low Manchester-II-coded

(MAN) signal. It will also check the pulse stream for timing and pulse errors (e.g. alternation error). The Control-

Unit enables the Receive-Register so that the received information can be clocked in every 6 µs. If there is a

pulse distance on the AS-i-line input longer than 7.0 µs, the Control-Unit recognizes this as no activity and

disables the Receive-Register.

If the received information is a correct master call with Start-Bit, eleven (11) Data-Bits, Parity-Bit, End-Bit, and

following pause of either greater than 6.0 µs (Synchronous Mode) or 18.0 µs (Asynchronous Mode), the UART

generates the internal active high REC-STRB signal. If the received telegram contained an error, the Control-

Unit will not generate the REC-STRB signal but go to its asynchronous state waiting for a pause at the AS-i line

input. After a pause was detected the UART is ready to receive the next telegram from the AS-i line input.

Data Sheet, Rev. 2.4, March 04, 2002 10/31

A²SI

Advanced AS-Interface IC

If a REC-STRB signal is generated, it occurs 10.0 to 10.5 µs (Synchronous Mode) or 21.5 to 22 µs

(Asynchronous Mode), respectively, after the rising edge (receiver comparator switching point) of the End-Bit on

the AS-i line input. If the slave was in asynchronous state, it now transforms to synchronous state. The Rec-

Muxer is locked to the AS-i line input until the next IC-reset. After the generation of a REC-STRB signal the

Control-Unit is waiting for about 6.0 µs for the SEND-STRB to be generated by the Main-State-Machine.

If the Control-Unit receives the active high SEND-STRB signal (pulse width 500 ns), it starts the transmission of

the Send-Register data. Therefore, the Send-Register data will be converted to an active low Manchester II-

coded (MAN) signal which is sent to the AS-i line transmitter via SEND-D. The first falling edge of the MAN

signal occurs 11.75 µs (Synchronous Mode) or 12.25 µs (Asynchronous Mode) after the rising edge of the REC-

STRB signal.

Hence, the delay from the rising edge of the End-Bit of the master call (AS-i input) to the first falling edge of the

slave response (AS-i output) is 21.75 to 22.25 µs (Synchronous Mode) or 33.75 to 34.25 µs (Asynchronous

Mode).

The SEND-SBY will always be set low 0.5 µs after the rising edge of REC-STRB. This is to turn on the

transmitter and let it settle at its operation point. The small offset current, which is required to operate the

transmitter, will be ramped up slowly to avoid any false voltage pulses on the AS-i line.

If all data is sent, the Control-Unit sets the sender in standby mode (SEND-SBY is high) and checks for a slave

pause on the AS-i line input. After the pause was detected, the UART is ready to receive the next telegram from

the AS-i line input.

In case the Control-Unit will not receive a SEND-STRB signal within the given time frame (for instance, if this

slave was not addressed), it will check for activity on the AS-i line. If any activity is detected in a time frame of

about 60 µs (another slave is transmitting data), the Control-Unit will wait for the next pause (slave pause).

Otherwise, it will just wait for the end of the response time (60 µs). In both cases the Control-Unit stays

synhronus. Once a slave pause was detected, the UART is ready to receive the next telegram from the AS-i line

input.

7.1.2.3 Ports

Although the A²SI can still store the AS-i Slave IO-Configuration Code it does not decode the value to configure

the direction of the Data-Port signals. The A²SI rather has distinctive Data-Out and Data-In ports which do

always work in parallel.

If bidirectional Data I/O is desired on top of a single Data-Port only (for backwards compatibility), the Data-Out

pins and the Data-In pins need to be shorted on the circuit board respectively and the nonvololatile Multiplex

flag has to be set TRUE.

In that case the output ports will switch to high impedance state for a certain time following the rising edge of the

Data-Strobe and allow the input data to be put on the Data-Port.

The input data will be read inverted if the nonvolotile Invert_Data_In flag is TRUE. This feature will simplify the

circuitry for NPN-inputs.

Note: The Multiplex and the Invert_Data_In flags are Configuration flags which are stored in the Firmware

region of the internal E²PROM. For a complete overview of the E²PROM content please see the A²SI

Application Notes.

The parameter port is always in bidirectional mode. The input data is the result of a wired-AND between the

open drain output drivers and the application drivers.

7.1.2.4 Watchdog

Compliant to the AS-i Complete Specification, the IC contains an independent watchdog which is generally

enabled by setting Watchdog_Active flag in the E²PROM to TRUE.

Data Sheet, Rev. 2.4, March 04, 2002 11/31

A²SI

Advanced AS-Interface IC

The watchdog will be activated for any slave address uneven to zero (0) after the reception of a

Write_Parameter Request at the particular Slave Address. It will be deactivated by any circuit Reset and after

the reception of a Delete_Address Request.

When activated, the Watchdog will be reset by every Write_Parameter and Data_Exchange Request received

by the Slave. If no such request was received by the particular Slave within 40ms, a Hardware Reset will be

performed and all Data and Parameter Outputs are switched inactive.

7.1.2.5 LED Output

An active FID (logic high) signal causes a flashing status LED (frequency approx. 2Hz) and Bit 1 of the AS-i

Slave Status-Register (S1) is set as well. If FID is not active (logic low), S1 is cleared. In that case the status

LED operation depends on the Data-Exchange-Disable flag.

The Data-Exchange-Disable is set to TRUE by each Reset of the A²SI. It becomes cleared (set to FALSE) after

the first reception of a Write_Parameter Request.

If the Data-Exchange-Disable flag is set, no data exchange can be performed through the Data Ports which is

indicated by a steady-on LED.

Note: An active FID has priority and will cause a flashing LED even if the Data-Exchange-Disable flag is set.

If the UART has selected the IRD input channel, the LED output is again overriden by the Addressing Channel

output. In this mode the LED pin does not operate as indicator LED output and periphery failures or status

information can not be signaled.

7.1.2.6 Overtemp shutdown

The A²SI continuously observes its silicon die temperature. If the temperature rises above 140°C the IC will be

put into shut-down and stay there until the next power-on reset occurs.

7.1.2.7 State Machine

The so-called Main-State-Machine performs the central control of the A2SI IC in terms of operation mode

selection, EEPROM access control, processing of master requests and the control of the IC ports. The Main-

State-Machine interfaces with the UART through the Receive- and the Send-Register as well as certain strobe

signals.

To avoid the situation in which a slave IC gets locked in a not allowed state (i.e by imission of strong

electromacnetic radiation) and thereby would jeopardize the entire system, all prohibited states of the state

machine will lead to a RESET which is comparable to the AS-i call ”Reset Slave (RES)”.

7.2 Summary of Master Calls

In the following diagram all Master Calls that will be decoded by the A2SI are listed. The "Enter Program Mode"

call is intended for factory programming of the IC only.

In order to achieve EEPROM firmware protection and to comply to the complete AS-i specification, the call

"Enter Program Mode" has to be deactivated before shipment of the slave.

Data Sheet, Rev. 2.4, March 04, 2002 12/31

A²SI

Advanced AS-Interface IC

Table 2: A²SI Master Calls and Related Save Responses

Master Re

uest Slave Res

onse

Instruction MNE ST CB A4 A3

0I4I3I2I1I0PBEBSBI3I2I1I0PBEB

Data Exchange DEXG 0 0 A4 A3 A2 A1 A0 0 D3

~Sel D2 D1 D0 PB 1 0 D3

E0 PB 1

Write Parameter WPAR 0 0 A4 A3 A2 A1 A0 1 P3

~Sel P2 P1 P0 PB 1 0 P3

I0 PB 1

Address Assignment ADRA0000000A4A3A2A1A0PB1 00110PB1

Write Extented ID

Code-1 WID1 01000000ID3ID2ID1ID0PB1 00000PB1

Delete Address DELA 0 1 A4 A3 A2 A1 A0 0 0 Sel 0 0 0 PB 1 0 0 0 0 0 PB 1

Reset Slave RES 0 1 A4A3A2A1A0 1 1

~Sel 100PB1 00110PB1

Read IO

Confi

uration RDIO 0 1 A4A3A2A1A0 1 0

Sel 0 0 0 PB 1 0 IO3 IO2 IO1 IO0 PB 1

Read ID Code RDID 0 1 A4A3A2A1A0 1 0

Sel 0 0 1 PB 1 0 ID3 ID2 ID1 ID0 PB 1

Read ID Code-1 RID1 0 1 A4 A3 A2 A1 A0 1 0

Sel 0 1 0 PB 1 0 ID3 ID2 ID1 ID0 PB 1

Read ID Code-2 RID2 0 1 A4 A3 A2 A1 A0 1 0

Sel 0 1 1 PB 1 0 ID3 ID2 ID1 ID0 PB 1

Read Status RDST 0 1 A4A3A2A1A0 1 1

~Sel 1 1 0 PB 1 0 S3 S2 S1 S0 PB 1

Broadcast (Reset) BR01 011111110101PB1 --- no slave response ---

Enter Program Mode PRGM010000011101PB1 --- no slave response ---

Note: In extended address mode the "Select Bit" defines whether the A-Slave or B-Slave is being addressed.

Dependent on the type of master call the I3 bit carries the select bit information (Sel) or the inverted

select bit information (~Sel).

7.3 Program Mode

Provided that the non-volatile configuration flag, Program-Mode-Disable, has not been set, the device can be

transferred in program mode by utilizing the “Enter Program Mode” call.

Please refer to the A²SI Application Notes [4] for details of the programming process.

AS-i Complete Specification compliance note:

In order to ensure full compliance with the AS-i Complete Specification, the Program-Mode-Disable flag must be

set in the final manufacturing and configuration process before an AS-i slave device is being delivered to field

application users.

Data Sheet, Rev. 2.4, March 04, 2002 13/31

A²SI

Advanced AS-Interface IC

8 Electrical Specification

8.1 Absolute Maximum Ratings

Any stress above the listed Absolute Maximum Ratings may cause permanent damage to the device. The given

conditions represent a stress rating only. Functional operation of the device at those conditions or at any other

stress above the Operational Limits is not implied. Exposure to maximum rating conditions for extended times

may effect device performance, functionality, and reliability.

Table 3: Absolute Maximum Ratings

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

V0V ,VGND Voltage reference 0 0 V

VASIP Positive AS-i supply voltage -0.3 40 V

VASIN Negative AS-i supply voltage -0.3 20 V 1

VASIP-ASIN Voltage difference from ASIP to ASIN (VASIP - VASIN)-0.340V

VASIPP AS-i supply pulse voltage, voltage difference between pins

ASIP and ASIN (from ASIP to ASIN)

50 V 3

VUIN Aux. power supply input voltage -0.3 40 V

VUINPV Aux. power supply input voltage pulse 50 V 3

Vinputs1 Voltage at pins DI3 - DI0, DO3 - DO0, P3 - P0, DSR, PST,

LED, FID, UOUT

-0.3 VUIN +

0.3

inputs1

£ 40V

Vinputs2 Voltage at pins OSC1, OSC2, IRD, CAP, U5R, U5RD -0.3 7 V

Iin Input current into any pin except supply pins -25 25 mA

H Humidity non-condensing 4

VHBM1 Electrostatic discharge – human body model (HBM1) 4000 V 5

VHBM2 Electrostatic discharge – human body model (HBM2) 2000 V 6

VEDM Electrostatic discharge – equipment discharge model

(EDM)

400 V 7

qSTG Storage temperature -55 125 °C

Ptot Total power dissipation 0.85 W 8

1 ASIN-pin shall be shorted to 0V-pin on PCB.

2 Reverse polarity protection has to be performed externally.

3 Pulse with £ 50µs, repetition rate £ 0.5 Hz.

4 Level 4 according to JEDEC-020A is guaranteed

5 HBM1: C = 100pF charged to VHBM1 with resistor R = 1.5kW in series, valid for ASIP-ASIN only.

6 HBM2: C = 100pF charged to VHBM2 with resistor R = 1.5kW in series, valid for all pins except ASIP-ASIN.

7 EDM: C = 200pF charged to VEDM with no resistor in series, valid for ASIP-ASIN only.

7 At maximum operating temperature, the allowed total power dissipation depends on the additional thermal resistance from case to

ambient and on the operation ambient temperature (see Figure 6).

CAUTION: ELECTROSTATIC SENSITIVE DEVICE

Permanent damage resulting in a loss of functionality or performance may occur if this device is subjected to high-energy

electrostatic discharge.

Data Sheet, Rev. 2.4, March 04, 2002 14/31

A²SI

Advanced AS-Interface IC

Figure 6: Maximum Power Dissipation,

PTOT = f(Ambient Temperature)

Table 4: Operating Conditions

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

VUIN Positive supply voltage 16 33.1 V 1

VASIN Negative AS-i supply voltage 0 0 V 2

V0V, VGND Negative supply voltage 0 0 V

IASI Supply current at VASI = 30V 9 mA 3

ICL1 Max. output sink current at pins DO3 - DO0, DSR 10 mA

ICL2 Max. output sink current at pins P0 - P3, PST 10 mA

qamb Ambient temperature range, operating range -25 85 °C

1 DC voltage

2 ASIN shall be shorted with 0V to ensure proper functionality of transmitter circuit.

3 fc = 8.000 MHz, no load at any pin without reaction of the circuit, ASIP is short-cut to UIN and ASIN to 0V respectively.

8.2 DC and AC Characteristics

All parameters are valid for the recommended range of VASIP - VASIN, VUIN - V0V, and qamb. The devices are

tested within the recommended range of VASIP - VASIN, VIN - V0V, qamb = +25°C (+ 85°C and - 25°C on sample

base only) unless otherwise stated. Unused input pins shall be connected to a suitable potential within the

application circuit because there are no internal pull-up/down resistors. It is recommended to connect these pins

either to 0V or via resistor to UOUT or U5R respectively.

With an external LOW signal at the data strobe pin DSR (pull-down open drain driver) for more than 44µs, the

IC will execute its reset procedure. During power on procedure all data and parameter ports will stay on high-

impedance state.

If the IC has been put in its initialization procedure by an external reset via DSR, the LED pin should not be

toggled externally to avoid that the IC control logic transfers to test mode.

Ptot = f (Ta); 1L / 2L = 1 layer / 2 layer PCB

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

-25 0 25 50 75 100

Ptot (2L)

Ptot (1L)

Data Sheet, Rev. 2.4, March 04, 2002 15/31

A²SI

Advanced AS-Interface IC

8.2.1 Digital Input and Output Pins

Table 5: Input/Output Voltage and Current

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

Pins DI0 - DI3, P0 - P3, DSR, FID, PST

VIL Voltage range for input ”low” level, not P0 – P3 0 2.5 V

VIL Voltage range for input ”low” level, only P0 – P3 0 2.4 V

VICH Voltage range for input ”high” level 3.5 VUOUT V

VHYST Hysteresis for switching level 0.25 V 1

IIL Current range for input ”low” level -20 -5 µA

IICH Current range for input ”high” level -10 10 µA VO = 5V

IIHV Current range for high voltage input 2 mA VO = 30V

Pins DO0 - DO3, P0 - P3, DSR, PST

VOL1 Voltage range for output ”low” level 0 1 V IOL1 = 10mA

VOL2 Voltage range for output ”low” level 0 0.4 V IOL2 = 2mA

IOH Output leakage current -10 10 µA VOH = 4.5V

CDL Capacitance at pin DSR 10 pF 2

Pin LED

VOL Voltage range for output ”low” level 0 1 V IOL1 = 10mA 3

IOH Output leakage current -10 30 µA VOH = 40V 4

1 Switching level approximately 3V, i.e. 3V ± VHYST.

2 For higher capacitive load an external pull-up resistor connected to UOUT is necessary to reach VIH ³ 3.5V at DSR in less than 35 µs after

the beginning of a DSR = Low pulse, otherwise a reset will be executed.

3 The output driver sends a “low” (LED on).

4 The output driver sends a “high” (equivalent to tri-state, LED off).

Data Sheet, Rev. 2.4, March 04, 2002 16/31

A²SI

Advanced AS-Interface IC

Table 6: Timing Parameter Port

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

tsetup Valid output data; P0 - P3 to PST-H/L 0.1 0.5 µs See Figure 7

tPST PST pulse width 5 6 µs

tPI-latch PST-H/L to parameter input latch 11 13.5 µs 1

tCYCLE Next cycle 150 µs

1 The parameter input data must be stable within the period that is defined by minimum and maximum tPI-latch.

PST

tsetup tPST

tCYCLE

tPI-latch

Parameter port output data

parameter input value (PIx) = parameter output value (POx) wired AND

with external signal source value

keep stable

min max

PO0-PO3

Figure 7: Timing Diagram Parameter Port P0 - P3

Data Sheet, Rev. 2.4, March 04, 2002 17/31

A²SI

Advanced AS-Interface IC

Table 7: Timing Data Port Outputs

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

tsetup Valid output data; DO0 - DO3 to DSR-H/L 0.1 0.5 µs Figure 9

thold Valid output data; DO0 - DO3 to DSR-L/H 0.1 0.5 µs

tDSTR DSR pulse width 5 6 µs

tDI-latch DSR-H/L to data input latch 11 13.5 µs 1

tCYCLE Next cycle 150 µs

1 The data input must be stable within the period that is defined by minimum and maximum of tDI-latch.

DSR

tsetup tDSR

tCYCLE

tDI-latch

Data port output data

keep stable

min max

DO0-DO3

DI0-DI3 Data port input data

thold

data remains, if multiplex

flag is not set

hi-z, if multiplex flag is set

Figure 8: Timing Diagram Data Port DO0 - DO3

Data Sheet, Rev. 2.4, March 04, 2002 18/31

A²SI

Advanced AS-Interface IC

Table 8: Timing Reset Signal

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

tALM1 Ext. DSR (no reset) 35 µs

tALM2 Ext. DSR to DO0 - DO3 Hi-Z 44 µs

tRESET1 Reset time after DSR = external L ->H transition 2 ms

DSR

DO0-DO3

tALM1

tALM2

tRESET1

hi-z

PO0-PO3

hi-z

Data port output data

Parameter port output data

Figure 9: Timing Diagram External Reset via DSR

Data Sheet, Rev. 2.4, March 04, 2002 19/31

A²SI

Advanced AS-Interface IC

8.2.2 Addressing Channel Input IRD

The addressing channel input IRD is a dedicated photo-diode input. The photo-diode can be connected to the

pins IRD and 0V directly. The IRD input is a AC current input. A valid signal at the current input has to have a

certain amplitude (range) and should not exceed a certain offset value (see Figure 10 and Table 9). A logic

"low" at the IRD input will be detected, if the present signal value drops below IIRDO, and a "high” will be

detected, if its present value is greater than IIRDO + IIRDA.

Table 9: AC Current Amplitude of IR Diode Input in Slave Mode

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

IIRDO Input current offset 10 µAPP

IIRDA Input current amplitude 10 100 µAPP

Table 10: Digital Input IRD in Master/Repeater Mode

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

VIL Voltage range for input ”low” level 0 2.5 V

VICH Voltage range for input ”high” level 3.5 VU5R V

Tr /TfRise/fall time 100 ns 1

1 In order to avoid jittery on the AS-i line, the rise/fall time of the IRD input signal should be as low as possible.

8.2.3 Fault Indication Input, FID

The fault indication input FID is a digital input dedicated for a periphery fault messaging signal (for properties

see Table 5). The S1 status bit is equivalent to the FID input signal. A FID transition will occur at S1 with a

certain delay, because a synchronizer circuit is put in between.

MIN

IIRDA

MAX

IIRDA

MAX

IIRDO

time

IRD

input

current

Figure 10: Photo Current Waveform

Data Sheet, Rev. 2.4, March 04, 2002 20/31

A²SI

Advanced AS-Interface IC

8.3 Voltage Outputs

Table 11: Properties of Voltage Output Pins UOUT and U5R

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

VUOUT UOUT output supply voltage VUIN-

VDROPmax

VUIN-

VDROPmin

UOUT = 30mA

VUOUTp UOUT output voltage pulse deviation 1.5 V 1

tUOUTp UOUT output voltage pulse deviation width 2 ms 1

VDROP Voltage drop from pin UIN to pin UOUT 6.5 7.7 V VUIN > 22V

VU5R 5V supply voltage 4.5 5.5 V

IUOUT UOUT output supply current 0 30 mA IU5R = 0 mA

I5V U5R output supply current 0 4 mA IUOUT < 26 mA

IoTotal voltage output current IUOUT + I5V 30 mA

IUOUTS Short circuit output current 50 mA

CLUOUT Load capacitance at UOUT 10 470 µF

CL5V Load capacitance at U5R 1 µF

1 COUT = 10 µF, output current switches from 0 to 30 mA and vice versa.

2 11.0V < VOUT < 27.6V.

Data Sheet, Rev. 2.4, March 04, 2002 21/31

A²SI

Advanced AS-Interface IC

8.3.1 AS-i Bus Load

The following parameters are determined with short-cut between the pins ASIP and UIN and the pins ASIN and

0V, respectively.

Table 12: AS-i Bus Interface Properties (Pins ASIP/ASIN and UIN)

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

VUIN Input AS-i voltage at UIN VUOUTmin+

VDROPmax

VUOUTmax +

VDROPmin

ILIN Input current limit at UIN 56 mA

VSIG Input signal voltage difference between ASIP

and ASIN

38V

ISIG Modulated output peak current from ASIP to

ASIN

55 68 mAP

CZener Parasitic capacitance of the external over-

voltage protection diode (zener diode)

20 pF 2

RIN1 Equivalent resistor of the device 16 kW2, 3

LIN1 Equivalent inductor of the device 18 mH 2, 3

CIN1 Equivalent capacitor of the device 30 pF 2, 3

RIN2 Equivalent resistor of the device 16 kW2, 3

LIN2 Equivalent inductor of the device 12 18 mH 2, 3

CIN2 Equivalent capacitor of the device 15 +

(L-12mH)*2.5pF/mH pF 2, 3

1 DC Parameter

2 The equivalent circuit of a slave (which is calculated from the impedance of the device and the paralleled external over-voltage protection

diode (zener diode)) has to satisfy the Complete AS-i-Specification v.2.1 concerning the requirements for the extended address range.

3 Subtracting the maximum parasitic capacitance of the external over voltage protection diode (20pF) either the triple RIN1, LIN1 and CIN1

or the triple RIN2, LIN2 and CIN2 has to be committed by the device to fulfil the Complete AS-i-Specification v2.1.

8.3.2 Input Impedance Control

Table 13: CAP Pin

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

RCAP External filter resistor 0 2.2 kW1

CCAP External filter capacitor 4.7 100 nF 1, 2

1 Recommended values for optimal impedance are: RCAP = 1.2 kW and CCAP = 10 nF (IC Revision A)

RCAP = 430 – 680 W and CCAP = 4.7 nF (IC Revision B)

See chapter 11, Package Marking, for details on how to distinguish different IC versions.

2 The de-coupling capacitor and serial resistor define internal low-pass filter time constant; lower values decrease the impedance but

improve the turn-on time. Higher values do not improve the impedance but do increase the turn-on time. The turn-on time also depends

on the load capacitor at UOUT. After connecting the slave to the power the capacitor is charged with the maximum current IUOUT. The

impedance will increase when the voltage allows the analog circuitry to fully operate.

Data Sheet, Rev. 2.4, March 04, 2002 22/31

A²SI

Advanced AS-Interface IC

8.3.3 Oscillator

Table 14: Oscillator Pins (OSC1 and OSC2)

SYMBOL PARAMETER MIN. MAX. UNITS NOTE

COSC External parasitic capacitor at oscillator pins

OSC1, OSC2

05pF

VIL Input ”low” voltage 0 1.5 V 1

VICH Input ”high” voltage 3.5 VU5R V

1 For external clock applied to OSC1 only.

9 Development Information Data

Table 15: Information Data

Conditions: Asynchronous mode, reset to default comparator level at „line pause“.

Symbol PARAMETER MIN. MAX. UNITS NOTE

VLSIGon Receiver comparator threshold level (see Figure

11)

45 50 % Related to

amplitude of 1st

pulse

treset1 Reset time after Master Call „Reset AS-i-Slave“ or

DSR = external L ->H transition

2ms 1

treset2 Reset time after power on 30 ms 2

treset3 Reset time after power on with high capacitive load 1000 ms 3

VASIP-PF VASIP voltage to detect power fail (master mode

only)

21.5 23.5 V

tLoff Power supply break down time (master mode only) 0.7 0.9 ms 4

VPOR1F VU5R voltage to trigger internal reset procedure,

falling voltage

3.0 4.0 V 1

VPOR1R VU5R voltage to trigger INIT procedure, rising

voltage

2.5 3.5 V 1

tLow Power-on reset pulse width 4 6 µs

TShut Chip temperature for thermal shut down

(overheating)

125 160 °C

1 Guaranteed by design only.

2 ‘Power_on’ starts latest at VUIN = 18V, external capacitor at pin UOUT = 10µF.

3 CUOUT = 470µF, treset3 is guaranteed by design only.

4 CUOUT > 10µF, no power fail generated at VASIP < VASIP-PF for t < tLoff (in master mode only).

Data Sheet, Rev. 2.4, March 04, 2002 23/31

A²SI

Advanced AS-Interface IC

First negative

pulse of the

AS-i telegram

VLSIGon

VLSIGon = (0.45 - 0.50) * VSIG / 2

The IC determines the

amplitude of the first

negative pulse of the

AS-i telegram. This

amplitude is asserted

to be VSIG / 2.

"DC level"

VSIG / 2

Figure 11: Receiver Comparator Set Up

VASIP

VPOR1R

VPOR1F

VUIN

VU5R

POR (active low)

No reset, but if the break down

time exceeds tLoff, a power-fail

signal will be generated

Reset will

be initalized

< ca. 15V

£ tLoff

ASIP

tLow

Power-on Reset will

be active, if the VU5R

drops below VPOR1F

MASTER MODE only All Modes

Figure 12: Power-Fail Generation (in Master Mode) and Reset Behavior (All Modes)

Data Sheet, Rev. 2.4, March 04, 2002 24/31

A²SI

Advanced AS-Interface IC

10 Application Circuits

The following figures show typical application cases of the A2SI IC. Figure 14 shows an application circuit in

which the A2SI is replacing an ASI3+ circuit. Finally, Figure 15 shows how the A2SI circuit can be used to

perform the analog/digital interface between the AS-i-line and the master electronics. Furthermore this figure

shows that the IC can be used in repeater applications as well.

10.1 EMC Precautions

Precaution must be taken to avoid radio frequency interference. It is recommended to keep input lines as short

as possible and to connect unused inputs to UOUT through a pull-up resistor. Furthermore, the supply pins

should be de-coupled with ceramic capacitors (10 to 100 nF) in addition to the normal de-coupling capacitors.

Also, it is recommended to connect a pull-up resistor from DSR (pin 22) to UOUT or U5R in order to avoid

unintentional reset under difficult EMC conditions.

10.2 Typical Slave Application

Note: Figure 13 and Figure 14 show all digital (data and parameter) ports without the application specific

connections. For correct function, it is important to consider that all output drivers are open drain stages and

hence each port must be connected with an appropriate pull-up resistor.

ASI

8 MHz

CCAP

DSR

PST

FID

LED

IRD

GND

UIN

UOUT

U5R

U5RD

OSC1

CAP

ASIP

ASIN

10 mF

2.2µF

A2SI

OSC2

+24V

+5V

DI0

DI1

DI2

DI3

DO0

DO1

DO2

DO3

DI_0

DI_1

DI_2

DI_3

DO_0

DO_1

DO_2

DO_3

DS&Reset

PST

Fault Input39V/1W

RCAP RED GREEN

10n 10n

22 k W

Figure 13: Typical Application, Slave Mode

Data Sheet, Rev. 2.4, March 04, 2002 25/31

A²SI

Advanced AS-Interface IC

10.3 Typical ASI3+ Compatible Application

Note: Depending on I/O-configuration, DO- and DI-ports are connected and Multiplex-Flag is set.

ASI

CCAP

DSR

PST

FID

LED

IRD

GND

UIN

UOUT

U5R

U5RD

CAP

ASIP

ASIN

10 mF

2.2µF

A2SI

8 MHz

OSC1

OSC2

+24V

+5V

DI0

DI1

DI2

DI3

DO0

DO1

DO2

DO3

DIO-0

DIO-1

DIO-2

DIO-3

DS&Reset

39V/1W

CAP

10n

22 kW

Figure 14: Typical ASI3+ Compatible Application

Data Sheet, Rev. 2.4, March 04, 2002 26/31

A²SI

Advanced AS-Interface IC

10.4 Typical Master/Repeater Application

For further information see also A²SI Application Note.

ASI+

ASI–

8 MHz

CCAP

DSR

PST

FID

LED

IRD

GND

UIN

UOUT

U5R

U5RD

OSC1

CAP

ASIP

ASIN

2.2µF

10 mF

A2SI

OSC2

DI0

DI1

DI2

DI3

DO0

DO1

DO2

DO3

39V

+UB

GND

+UB

GND

+UB

GND

+UB

GND

+5V

REC-CLK

(optional)

REC-STRB

(optional)

RECEIVE

DATA

SEND

ISOLATION

POWER-FAI

RCAP

10n

Figure 15: Master/Repeater Application

Data Sheet, Rev. 2.4, March 04, 2002 27/31

A²SI

Advanced AS-Interface IC

11 Package Outline

Table 16: Package Dimensions (mm)

Symbol A A1 A2 B C D E e H L a

Nominal 1.86 0.13 1.73 0.30 0.15 10.20 5.30 7.80 0.75 4°

Maximum 1.99 0.21 1.78 0.38 0.20 10.33 5.38 7.90 0.95 8°

Minimum 1.73 0.05 1.68 0.25 0.13 10.07 5.20

0.65

BSC 7.65 0.55 0°

Figure 16: SSOP Package

Figure 17: Package Dimensions

Data Sheet, Rev. 2.4, March 04, 2002 28/31

A²SI

Advanced AS-Interface IC

12 Package Marking

Top Marking: A²SI Product name

ZMD Manufacturer

R- Revision code

XXXX Date code (year and week)

Y Assembly location

ZZ Traceability

Bottom Marking: LLLLLL ZMD Lot Number

The yellow dot indicating pre-programmed Master function is printed at the pin 1 marking Å.

Note: IC Revision A did not have a revision code marking. ICs without a Revision Code are equivalent to

Revision A. Revision B shows “B-“ .

PIN 1

TOP VIEW BOTTOM

PIN 1

LLLLLL

2SI ZMD

R-XXXXYZZ

Figure 18: Package Marking

Data Sheet, Rev. 2.4, March 04, 2002 29/31

A²SI

Advanced AS-Interface IC

13 Evaluation boards for A²SI

Evaluation board equipped with A²SI can be ordered from Bihl+Wiedeman GmbH

(www.bihl-wiedemann.de)

Figure 19: Evaluation board dimensions (L x W x H):(34 x 31 x 8) mm³

14 Ordering Information

Ordering

Code

Description Operating Temperature

Range

Package Type Device

Marking

Shipping Form

A2SI-ST Standard version of

A²SI

-25°C to 85°C 28-pin SSOP A²SI Tubes

(47 parts/tube)

A2SI-SR Standard version of

A²SI

-25°C to 85°C 28-pin SSOP A²SI Tape-and-Reel

(1500 parts/reel)

A2SI-MT Pre-programmed

master function

-25°C to 85°C 28-pin SSOP A²SI

+ yellow dot

Tubes

(47 parts/tube)

A2SI-MR Pre-programmed

master function

-25°C to 85°C 28-pin SSOP A²SI

+ yellow dot

Tape-and-Reel

(1500 parts/reel)

Data Sheet, Rev. 2.4, March 04, 2002 30/31

A²SI

Advanced AS-Interface IC

15 Application Support

15.1 AS-International Association

Documentation and promotional materials as well as datailed technical specifications regarding the AS-Interface

Bus Standard are available from:

AS-International Association

Contact - Rolf Becker

Zum Taubengarten 52

D-63571 Gelnhausen

PO Box 1103 Zip (63551)

Tel: +49 6051 47 32 12

Fax: +49 6051 4732 82

Email: as-interface@t-online.de

http://www.as-interface.net

Refer to the Association’s website hereabove for contact info on nine local AS-Interface associations which

provide local support within Europe, in the US and in Japan.

15.2 ZMD

An Application Note an A²SI can be found under

www.zmd.de

www.zmda.com

A²SI device related application support requests can be addressed to

asi@zmd.de

15.3 ZMD Application Support Partners

Bihl+Wiedemann

Flosswoerthstrasse 41

D-68199 Mannheim, Germany

Tel.: +49 621 3 3996 0

Fax: +49 621 3 3922 39

Email: mail@bihl-wiedemann.de

http://www.bihl-wiedemann.de

fieldbus specialists

217 Colchester Road, Kilsyth

3137 Victoria, Australia

Tel.: +61 3 9761 4653

Fax: +61 3 9761 5525

Email: fs_sales@fieldbus.com.au

http://www.fieldbus.com.au

Data Sheet, Rev. 2.4, March 04, 2002 31/31

A²SI

Advanced AS-Interface IC

16 Sales Contacts

Sales Office Dresden

Zentrum Mikroelektronik Dresden AG

Grenzstraße 28

D-01109 Dresden

Germany

Phone +49-351-8822-370

Fax +49-351-8822-337

sales@zmd.de

Life Support Policy

ZMD products are not designed, intended, or authorised for use as components in systems intended for surgical implant into the body, or

other applications intended to support or sustain life, or for any other application in which the failure of the ZMD product could create a

situation where personal injury or death may occur.

Components used in life-support devices or systems must be expressly authorised by ZMD for such purpose.

Limited Warranty

The information in this document has been carefully checked and is believed to be reliable. However Zentrum Mikroelektronik Dresden

(ZMD) makes no guarantee or warranty concerning the accuracy of said information and shall not be responsible for any loss or damage of

whatever nature resulting from the use of, or reliance upon it. The information in this document describes the type of component and shall

not be considered as assured characteristics.

ZMD does not guarantee that the use of any information contained herein will not infringe the patent, trademark, copyright, mask work right

or other rights of third parties, and no patent or licence is implied hereby. This document does not in any way extent ZMDs warranty on any

product beyond that set forth in its standard terms and conditions of sale.

ZMD reserves terms of delivery and reserves the right to make changes in the products or specifications, or both, presented in this

publication at any time and without notice.

Sales Office Long Island

ZMD America Inc.

201 Old Country Road

Melville, NY 11747

USA

Phone +1-631-549-2666

Fax +1-631-549-2882

info@zmda.com