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Features
●Single 2.5V - 3.6V or 2.7V - 3.6V supply
●Atmel® RapidS™ serial interface: 66MHz maximum clock frequency
●SPI compatible modes 0 and 3
●User configurable page size
●512 bytes per page
●528 bytes per page
●Page size can be factory preconfigured for 512 bytes
●Page program operation
●Intelligent programming operation
●8,192 pages (512/528 bytes/page) main memory
●Flexible erase options
●Page erase (512 bytes)
●Block erase (4KB)
●Sector erase (64KB)
●Chip erase (32Mb)
●Two SRAM data buffers (512/528 bytes)
●Allows receiving data while reprogramming the flash array
●Continuous read capability through entire array
●Ideal for code shadowing applications
●Low power dissipation
●7mA active read current ,typical
●25µA standby current, typical
●15μA deep power down, typical
●Hardware and software data protection features
●Individual sector
●Sector lockdown for secure code and data storage
●Individual sector
●Security: 128-byte security register
●64-byte user programmable space
●Unique 64-byte device identifier
●JEDEC standard manufacturer and device ID read
●100,000 program/erase cycles per page, minimum
●Data retention: 20 years
●Industrial temperature range
●Green (Pb/halide-free/RoHS compliant) packaging options
Atmel AT45DB321D
32Mb, 2.5V or 2.7V
Atmel DataFlash
DATASHEET
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Atmel AT45DB321D
1. Description
The Atmel AT45DB321D is a 2.5V or 2.7V, serial interface, sequential access flash memory ideally suited for a wide variety of
digital voice-, image-, program code-, and data-storage applications. The AT45DB321D supports the Atmel RapidS serial
interface for applications requiring very high speed operations. The RapidS serial interface is SPI compatible for frequencies up
to 66MHz. The 34,603,008-bits of memory are organized as 8,192 pages of 512 bytes or 528 bytes each. In addition to the main
memory, the AT45DB321D also contains two SRAM buffers of 512/528 bytes each. These buffers allow the receiving of data
while a page in the main memory is being reprogrammed, as well as the writing of a continuous data stream. EEPROM
(electrically erasable and programmable read-only memory) emulation (bit or byte alterability) is easily handled with a self-
contained, three-step read-modify-write operation. Unlike conventional flash memories, which are accessed randomly with
multiple address lines and a parallel interface, Atmel DataFlash® devices use a RapidS serial interface to sequentially access its
data. The simple sequential access dramatically reduces active pin count, facilitates hardware layout, increases system
reliability, minimizes switching noise, and reduces package size. The device is optimized for use in many commercial and
industrial applications where high density, low pin count, low voltage and low power are essential.
To allow for simple, in-system reprogrammability, the AT45DB321D does not require high input voltages for programming. The
device operates from a single power supply, 2.7V to 3.6V, for both the program and read operations. The AT45DB321D is
enabled through the chip select pin (CS) and accessed via a three-wire interface consisting of the serial input (SI), serial output
(SO), and serial clock (SCK) lines.
All programming and erase cycles are self timed.
Figure 1-1. Pin configurations and pinouts.
MLF(1) (VDFN)
Top View
Note: 1. The metal pad on the bottom of
the MLF package is floating.
This pad can be a “No Connect” or
connected to GND.
SOIC
Top View
BGA Package Ball-out
Top View
TSOP: Type 1
Top View
Note: TSOP package is not recommended for new designs.
Future die shrinks will support 8-pin packages only.
SI
SCK
RESET
CS
SO
GND
VCC
WP
8
7
6
5
1
2
3
4
1
2
3
4
8
7
6
5
SI
SCK
RESET
CS
SO
GND
VCC
WP
NC NC NC NC
NCNC
NC
NC
NC
NC NC NC
NC
NC
NCVCCGNDSCK
CS RDY/BSY WP
SISO RESET
1 2 3 4 5
A
B
C
D
E
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RDY/BUSY
RESET
WP
NC
NC
VCC
GND
NC
NC
NC
CS
SCK
SI
SO
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
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Atmel AT45DB321D
Table 1-1. Pin Configurations
Symbol Name and Function
Asserted
State Type
CS Chip Select: Asserting the CS pin selects the device. When the CS pin is deasserted, the
device will be deselected and normally be placed in the standby mode (not deep power-
down mode), and the output pin (SO) will be in a high-impedance state. When the device
is deselected, data will not be accepted on the input pin (SI).
A high-to-low transition on the CS pin is required to start an operation, and a low-to-high
transition is required to end an operation. When ending an internally self-timed operation
such as a program or erase cycle, the device will not enter the standby mode until the
completion of the operation.
Low Input
SCK Serial Clock: This pin is used to provide a clock to the device, and is used to control the
flow of data to and from the device. Command, address, and input data present on the SI
pin are always latched on the rising edge of SCK, while output data on the SO pin are
always clocked out on the falling edge of SCK.
– Input
SI Serial Input: The SI pin is used to shift data into the device. The SI pin is used for all data
input, including command and address sequences. Data on the SI pin are always latched
on the rising edge of SCK.
– Input
SO Serial Output: The SO pin is used to shift data out from the device. Data on the SO pin
are always clocked out on the falling edge of SCK.
– Output
WP Write Protect: When the WP pin is asserted, all sectors specified for protection by the
sector protection register will be protected against program and erase operations,
regardless of whether the enable sector protection command has been issued or not. The
WP pin functions independently of the software controlled protection method. After the
WP pin goes low, the content of the sector protection register cannot be modified.
If a program or erase command is issued to the device while the WP pin is asserted, the
device will simply ignore the command and perform no operation. The device will return to
the idle state once the CS pin has been deasserted. The enable sector protection
command and sector lockdown command, however, will be recognized by the device
when the WP pin is asserted.
The WP pin is internally pulled high, and may be left floating if hardware controlled
protection will not be used. However, it is recommended that the WP pin also be
externally connected to VCC whenever possible.
Low Input
RESET Reset: A low state on the reset pin (RESET) will terminate the operation in progress and
reset the internal state machine to an idle state. The device will remain in the reset
condition as long as a low level is present on the RESET pin. Normal operation can
resume once the RESET pin is brought back to a high level.
The device incorporates an internal power-on reset circuit, and so there are no restrictions
on the RESET pin during power-on sequences. If this pin and feature are not utilized, it is
recommended that the RESET pin be driven high externally.
Low Input
RDY/BUSY Ready/Busy: This open drain output pin will be driven low when the device is busy in an
internally self-timed operation. This pin, which is normally in a high state (through
an external pull-up resistor), will be pulled low during programming/erase operations,
compare operations, and page-to-buffer transfers.
The busy status indicates that the flash memory array and one of the buffers cannot be
accessed; read and write operations to the other buffer can still be performed.
– Output
VCC Device Power Supply: The VCC pin is used to supply the source voltage to the device.
Operations at invalid VCC voltages may produce spurious results and should not be
attempted.
– Power
GND Ground: The ground reference for the power supply. GND should be connected to the
system ground.
– Ground
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Atmel AT45DB321D
Figure 1-2. Block Diagram
2. Memory Array
To provide optimal flexibility, the AT45DB321D memory array is divided into three levels of granularity comprising sectors,
blocks, and pages. The “Memory Architecture Diagram” illustrates the breakdown of each level, and details the number of
pages per sector and block. All program operations to the DataFlash device occur on a page-by-page basis. The erase
operations can be performed at the chip, sector, block, or page level.
Figure 2-1. Memory Architecture Diagram
Flash Memory Array
Page (512-/528-bytes)
Buffer 2 (512-/528-bytes)Buffer 1 (512-/528-bytes)
I/O Interface
SCK
CS
RESET
VCC
GND
RDY/BUSY
WP
SOSI
SECTOR 0a = 8 Pages
4,096-/4,224-bytes
SECTOR 0b = 120 Pages
61,440-/63,360-bytes
Block = 4,096-/4,224-bytes
8 Pages
SECTOR 0a
SECTOR 0b
Page = 512-/528-bytes
PAGE 0
PAGE 1
PAGE 6
PAGE 7
PAGE 8
PAGE 9
PAGE 8,190
PAGE 8,191
BLOCK 0
PAGE 14
PAGE 15
PAGE 16
PAGE 17
PAGE 18
BLOCK 1
Sector Architecture Block Architecture Page Architecture
BLOCK 0
BLOCK 1
BLOCK 62
BLOCK 63
BLOCK 64
BLOCK 65
BLOCK 1,022
BLOCK 1,023
BLOCK 126
BLOCK 127
BLOCK 128
BLOCK 129
SECTOR 1
SECTOR 63 = 128 Pages
65,536-/67,586-bytes
BLOCK 2
SECTOR 1 = 128 Pages
65,536-/67,584-bytes
SECTOR 62 = 128 Pages
65,536-/67,584-bytes
SECTOR 2 = 128 Pages
65,536-/67,584-bytes
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Atmel AT45DB321D
3. Device Operation
The device operation is controlled by instructions from the host processor. The list of instructions and their associated opcodes
are contained in Table 13-1 on page 24 through Table 13-7 on page 27. A valid instruction starts with the falling edge of CS,
followed by the appropriate 8-bit opcode and the desired buffer or main memory address location. While the CS pin is low,
toggling the SCK pin controls the loading of the opcode and the desired buffer or main memory address location through the SI
(serial input) pin. All instructions, addresses, and data are transferred with the most-significant bit (msb) first.
Buffer addressing for the standard DataFlash page size (528 bytes) is referenced in the datasheet using the terminology BFA9
- BFA0 to denote the ten address bits required to designate a byte address within a buffer. Main memory addressing is
referenced using the terminology PA12 - PA0 and BA9 - BA0, where PA12 - PA0 denotes the 13 address bits required to
designate a page address and BA9 - BA0 denotes the ten address bits required to designate a byte address within the page.
For a “power of two” binary page size (512 bytes), the buffer addressing is referenced in the datasheet using the conventional
terminology BFA8 - BFA0 to denote the nine address bits required to designate a byte address within a buffer. Main memory
addressing is referenced using the terminology A21 - A0, where A21 - A9 denotes the 13 address bits required to designate a
page address and A8 - A0 denotes the nine address bits required to designate a byte address within a page.
4. Read Commands
By specifying the appropriate opcode, data can be read from the main memory or from either one of the two SRAM data buffers.
The DataFlash device supports RapidS protocols for Mode 0 and Mode 3. Please refer to Section 22., Detailed Bit-level Read
Waveform – Atmel RapidS Serial Interface Mode 0/Mode 3 diagrams in this datasheet for details on the clock cycle sequences
for each mode.
4.1 Continuous Array Read (Legacy Command: E8H): Up to 66MHz
By supplying an initial starting address for the main memory array, the continuous array read command can be utilized to
sequentially read a continuous stream of data from the device by simply providing a clock signal; no additional addressing
information or control signals need to be provided. The DataFlash device incorporates an internal address counter that will
automatically increment on every clock cycle, allowing one continuous read operation without the need of additional address
sequences. To perform a continuous read from the standard DataFlash page size (528 bytes), an opcode of E8H must be
clocked into the device, followed by three address bytes (which comprise the 24-bit page and byte address sequence) and four
“don’t care” bytes. The first 13 bits (PA12 - PA0) of the 23-bit address sequence specify which page of the main memory array
to read, and the last 10 bits (BA9 - BA0) of the 23-bit address sequence specify the starting byte address within the page. To
perform a continuous read from the binary page size (512-bytes), the opcode (E8H) must be clocked into the device followed by
three address bytes and four don’t care bytes. The first 13 bits (A21 - A9) of the 22-bit sequence specify which page of the main
memory array to read, and the last 9 bits (A8 - A0) of the 22-bit address sequence specify the starting byte address within the
page. The don’t care bytes that follow the address bytes are needed to initialize the read operation. Following the don’t care
bytes, additional clock pulses on the SCK pin will result in data being output on the SO (serial output) pin.
The CS pin must remain low during the loading of the opcode, the address bytes, the don’t care bytes, and the reading of data.
When the end of a page in main memory is reached during a continuous array read, the device will continue reading at the
beginning of the next page, with no delays incurred during the page boundary crossover (the crossover from the end of one
page to the beginning of the next page). When the last bit in the main memory array has been read, the device will continue
reading back at the beginning of the first page of memory. As with crossing over page boundaries, no delays will be incurred
when wrapping around from the end of the array to the beginning of the array.
A low-to-high transition on the CS pin will terminate the read operation and tri-state the output pin (SO). The maximum SCK
frequency allowable for the continuous array read is defined by the fCAR1 specification. The continuous array read bypasses
both data buffers and leaves the contents of the buffers unchanged.
4.2 Continuous Array Read (High Frequency Mode: 0BH): Up to 66MHz
This command can be used with the serial interface to read the main memory array sequentially in high-speed mode for any
clock frequency up to the maximum specified by fCAR1. To perform a continuous read array with the page size set to 528 bytes,
CS must first be asserted, and then a 0BH opcode must be clocked into the device, followed by three address bytes and a
dummy byte. The first 13 bits (PA12 - PA0) of the 23-bit address sequence specify which page of the main memory array to
read, and the last 10 bits (BA9 - BA0) of the 23-bit address sequence specify the starting byte address within the page. To
perform a continuous read with the page size set to 512 bytes, the 0BH opcode must be clocked into the device, followed by
three address bytes (A21 - A0) and a dummy byte. Following the dummy byte, additional clock pulses on the SCK pin will result
in data being output on the SO (serial output) pin.
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Atmel AT45DB321D
The CS pin must remain low during the loading of the opcode, the address bytes, and the reading of data. When the end of a
page in the main memory is reached during a continuous array read, the device will continue reading at the beginning of the
next page, with no delays incurred during the page boundary crossover (the crossover from the end of one page to the
beginning of the next page). When the last bit in the main memory array has been read, the device will continue reading back at
the beginning of the first page of memory. As with crossing over page boundaries, no delays will be incurred when wrapping
around from the end of the array to the beginning of the array. A low-to-high transition on the CS pin will terminate the read
operation and tri-state the output pin (SO). The maximum SCK frequency allowable for the continuous array read is defined by
the fCAR1 specification. The continuous array read bypasses both data buffers and leaves the contents of the buffers unchanged.
4.3 Continuous Array Read (Low Frequency Mode: 03H): Up to 33MHz
This command can be used with the serial interface to read the main memory array sequentially without a dummy byte up to the
maximum frequency specified by fCAR2. To perform a continuous read array with the page size set to 528 bytes, the CS must
first be asserted, and then a 03H opcode must be clocked into the device, followed by three address bytes (which comprise the
24-bit page and byte address sequence). The first 13 bits (PA12 - PA0) of the 23-bit address sequence specify which page of
the main memory array to read, and the last 10 bits (BA9 - BA0) of the 23-bit address sequence specify the starting byte
address within the page. To perform a continuous read with the page size set to 512 bytes, the 03H opcode must be clocked
into the device, followed by three address bytes (A21 - A0). Following the address bytes, additional clock pulses on the SCK pin
will result in data being output on the SO (serial output) pin.
The CS pin must remain low during the loading of the opcode, the address bytes, and the reading of data. When the end of a
page in the main memory is reached during a continuous array read, the device will continue reading at the beginning of the
next page with no delays incurred during the page boundary crossover (the crossover from the end of one page to the beginning
of the next page). When the last bit in the main memory array has been read, the device will continue reading back at the
beginning of the first page of memory. As with crossing over page boundaries, no delays will be incurred when wrapping around
from the end of the array to the beginning of the array. A low-to-high transition on the CS pin will terminate the read operation
and tri-state the output pin (SO). The continuous array read bypasses both data buffers and leaves the contents of the buffers
unchanged.
4.4 Main Memory Page Read
A main memory page read allows the user to read data directly from any one of the 8,192 pages in the main memory, bypassing
both of the data buffers and leaving the contents of the buffers unchanged. To start a page read from the standard DataFlash
page size (528 bytes), an opcode of D2H must be clocked into the device, followed by three address bytes (which comprise the
24-bit page and byte address sequence) and four don’t care bytes. The first 13 bits (PA12 - PA0) of the 23-bit address
sequence specify the page in main memory to be read, and the last 10 bits (BA9 - BA0) of the 23-bit address sequence specify
the starting byte address within that page. To start a page read from the binary page size (512 bytes), the D2H opcode must be
clocked into the device, followed by three address bytes and four don’t care bytes. The first 13 bits (A21 - A9) of the 22-bit
sequence specify which page of the main memory array to read, and the last 9 bits (A8 - A0) of the 22-bit address sequence
specify the starting byte address within the page. The don’t care bytes that follow the address bytes are sent to initialize the
read operation. Following the don’t care bytes, additional pulses on SCK result in data being output on the SO (serial output)
pin. The CS pin must remain low during the loading of the opcode, the address bytes, the don’t care bytes, and the reading of
data. When the end of a page in main memory is reached, the device will continue reading back at the beginning of the same
page. A low-to-high transition on the CS pin will terminate the read operation and tri-state the output pin (SO). The maximum
SCK frequency allowable for the main memory page read is defined by the fSCK specification. The main memory page read
bypasses both data buffers and leaves the contents of the buffers unchanged.
4.5 Buffer Read
The SRAM data buffers can be accessed independently of the main memory array, and utilizing the buffer read command
allows data to be sequentially read directly from the buffers. Four opcodes, D4H or D1H for buffer 1 and D6H or D3H for buffer
2, can be used for the buffer read command. The use of each opcode depends on the maximum SCK frequency that will be
used to read data from the buffer. The D4H and D6H opcodes can be used at any SCK frequency, up to the maximum specified
by fCAR1. The D1H and D3H opcodes can be used for lower frequency read operations, up to the maximum specified by fCAR2.
To perform a buffer read from the standard DataFlash buffer (528 bytes), the opcode must be clocked into the device, followed
by three address bytes comprised of 14 don’t care bits and 10 buffer address bits (BFA9 - BFA0). To perform a buffer read from
the binary buffer (512 bytes), the opcode must be clocked into the device, followed by three address bytes comprised of 15
don’t care bits and 9 buffer address bits (BFA8 - BFA0). Following the address bytes, one don’t care byte must be clocked in to
initialize the read operation. The CS pin must remain low during the loading of the opcode, the address bytes, the don’t care
byte, and the reading of data. When the end of a buffer is reached, the device will continue reading back at the beginning of the
buffer. A low-to-high transition on the CS pin will terminate the read operation and tri-state the output pin (SO).
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Atmel AT45DB321D
5. Program and Erase Commands
5.1 Buffer Write
Data can be clocked in from the input pin (SI) into either buffer 1 or buffer 2. To load data into the standard DataFlash buffer
(528 bytes), a 1-byte opcode, 84H for buffer 1 or 87H for buffer 2, must be clocked into the device, followed by three address
bytes comprised of 14 don’t care bits and 10 buffer address bits (BFA9 - BFA0). The 10 buffer address bits specify the first byte
in the buffer to be written. To load data into the binary buffers (512 bytes each), a 1-byte 84H opcode for buffer 1 or 87H opcode
for buffer 2 must be clocked into the device, followed by three address bytes comprised of 15 don’t care bits and 9 buffer
address bits (BFA8 - BFA0). The nine buffer address bits specify the first byte in the buffer to be written. After the last address
byte has been clocked into the device, data can then be clocked in on subsequent clock cycles. If the end of the data buffer is
reached, the device will wrap around back to the beginning of the buffer. Data will continue to be loaded into the buffer until a
low-to-high transition is detected on the CS pin.
5.2 Buffer to Main Memory Page Program with Built-in Erase
Data written into either buffer 1 or buffer 2 can be programmed into the main memory. A 1-byte opcode, 83H for buffer 1 or 86H
for buffer 2, must be clocked into the device. For the standard DataFlash page size (528 bytes), the opcode must be followed by
three address bytes consist of 1 don’t care bit, 13 page address bits (PA12 - PA0) that specify the page in the main memory to
be written, and 10 don’t care bits. To perform a buffer to main memory page program with built-in erase for the binary page size
(512 bytes), the 83H opcode for buffer 1 or 86H opcode for buffer 2 must be clocked into the device, followed by three address
bytes consisting of 2 don’t care bits, 13 page address bits (A21 - A9) that specify the page in the main memory to be written, and
9 don’t care bits. When a low-to-high transition occurs on the CS pin, the part will first erase the selected page in main memory
(the erased state is a logic one) and then program the data stored in the buffer into the specified page in main memory. The
erase and the programming of the page are internally self-timed, and should take place in a maximum time of tEP. During this
time, the status register and the RDY/BUSY pin will indicate that the part is busy.
5.3 Buffer to Main Memory Page Program without Built-in Erase
A previously-erased page within main memory can be programmed with the contents of either buffer 1 or buffer 2. A one-byte
opcode, 88H for buffer 1 or 89H for buffer 2, must be clocked into the device. For the standard DataFlash page size (528 bytes),
the opcode must be followed by three address bytes that consist of 1 don’t care bit, 13 page address bits (PA12 - PA0) that
specify the page in the main memory to be written, and 10 don’t care bits. To perform a buffer to main memory page program
without built-in erase for the binary page size (512 bytes), the 88H opcode for buffer 1 or 89H opcode for buffer 2 must be
clocked into the device, followed by three address bytes consisting of 2 don’t care bits, 13 page address bits (A21 - A9) that
specify the page in the main memory to be written, and 9 don’t care bits. When a low-to-high transition occurs on the CS pin, the
part will program the data stored in the buffer into the specified page in the main memory. It is necessary that the page in main
memory being programmed has been previously erased using one of the erase commands (page erase or block erase). The
programming of the page is internally self-timed, and should take place in a maximum time of tP. During this time, the status
register and the RDY/BUSY pin will indicate that the part is busy.
5.4 Page Erase
The page erase command can be used to individually erase any page in the main memory array, allowing the buffer to main
memory page program to be utilized at a later time. To perform a page erase in the standard DataFlash page size (528 bytes),
an opcode of 81H must be loaded into the device, followed by three address bytes comprised of 1 don’t care bit, 13 page
address bits (PA12 - PA0) that specify the page in the main memory to be erased, and 10 don’t care bits. To perform a page
erase in the binary page size (512 bytes), the 81H opcode must be loaded into the device, followed by three address bytes
consisting of 2 don’t care bits, 13 page address bits (A21 - A9) that specify the page in the main memory to be erased, and 9
don’t care bits. When a low-to-high transition occurs on the CS pin, the part will erase the selected page (the erased state is a
logical 1). The erase operation is internally self-timed, and should take place in a maximum time of tPE. During this time, the
status register and the RDY/BUSY pin will indicate that the part is busy.
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5.5 Block Erase
A block of eight pages can be erased at one time. This command is useful when large amounts of data have to be written into
the device. This will avoid using multiple page erase commands. To perform a block erase for the standard DataFlash page size
(528-bytes), an opcode of 50H must be loaded into the device, followed by three address bytes comprised of 1 don’t care bit,
10 page address bits (PA12-PA3), and 13 don’t care bits. The 10 page address bits are used to specify which block of eight
pages is to be erased. To perform a block erase for the binary page size (512 bytes), the 50H opcode must be loaded into the
device, followed by three address bytes consisting of 2 don’t care bits, 10 page address bits (A21 - A12), and 12 don’t care bits.
The 10 page address bits are used to specify which block of eight pages is to be erased. When a low-to-high transition occurs
on the CS pin, the part will erase the selected block of eight pages. The erase operation is internally self-timed, and should take
place in a maximum time of tBE. During this time, the status register and the RDY/BUSY pin will indicate that the part is busy.
Table 5-1. Block Erase Addressing
5.6 Sector Erase
The sector erase command can be used to individually erase any sector in the main memory. There are 64 sectors, and only
one sector can be erased at a time. To perform a sector 0a or sector 0b erase for the standard DataFlash page size (528 bytes),
an opcode of 7CH must be loaded into the device, followed by three address bytes comprised of 1 don’t care bit, 10 page
address bits (PA12 - PA3), and 13 don’t care bits. To perform a sector 1-63 erase, the 7CH opcode must be loaded into the
device, followed by three address bytes comprised of 1 don’t care bit, 6 page address bits (PA12 - PA7), and 17 don’t care bits.
To perform a sector 0a or sector 0b erase for the binary page size (512 bytes), an opcode of 7CH must be loaded into the
device, followed by three address bytes comprised of 2 don’t care bits, 10 page address bits (A21 - A12), and 12 don’t care bits.
To perform a sector 1-63 erase, the 7CH opcode must be loaded into the device, followed by three address bytes comprised of
2 don’t care bits, 6 page address bits (A21 - A16), and 16 don’t care bits. The page address bits are used to specify any valid
address location within the sector to be erased. When a low-to-high transition occurs on the CS pin, the part will erase the
selected sector. The erase operation is internally self-timed, and should take place in a maximum time of tSE. During this time,
the status register and the RDY/BUSY pin will indicate that the part is busy.
PA12/
A21
PA11/
A20
PA10/
A19
PA9/
A18
PA8/
A17
PA7/
A16
PA6/
A15
PA5/
A14
PA4/
A13
PA3/
A12
PA2/
A11
PA1/
A10
PA0/
A9 Block
0 0 0 0 0 0 0 0 0 0 X X X 0
0 0 0 0 0 0 0 0 0 1 X X X 1
0 0 0 0 0 0 0 0 1 0 X X X 2
0 0 0 0 0 0 0 0 1 1 X X X 3
● ● ● ● ● ● ● ● ● ● ● ● ● ●
● ● ● ● ● ● ● ● ● ● ● ● ● ●
● ● ● ● ● ● ● ● ● ● ● ● ● ●
1 1 1 1 1 1 1 1 0 0 X X X 1020
1 1 1 1 1 1 1 1 0 1 X X X 1021
1 1 1 1 1 1 1 1 1 0 X X X 1022
1 1 1 1 1 1 1 1 1 1 X X X 1023
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Table 5-2. Sector Erase Addressing
5.7 Chip Erase(1)
The entire main memory can be erased at one time by using the chip erase command.
To execute the chip erase command, a four-byte command sequence, C7H, 94H, 80H, and 9AH, must be clocked into the
device. Since the entire memory array is to be erased, no address bytes need to be clocked into the device, and any data
clocked in after the opcode will be ignored. After the last bit of the opcode sequence has been clocked in, the CS pin can be
deasserted to start the erase process. The erase operation is internally self-timed, and should take place in a time of tCE. During
this time, the status register will indicate that the device is busy.
The chip erase command will not affect sectors that are protected or locked down; the contents of those sectors will remain
unchanged. Only those sectors that are not protected or locked down will be erased.
Note: 1. Refer to the errata regarding chip erase on page 50.
The WP pin can be asserted while the device is erasing, but protection will not be activated until the internal erase cycle
completes.
Table 5-3. Chip Erase Command
Figure 5-1. Chip Erase
Note: 1. Refer to the errata regarding chip erase on page 50.
PA12/
A21
PA11/
A20
PA10/
A19
PA9/
A18
PA8/
A17
PA7/
A16
PA6/
A15
PA5/
A14
PA4/
A13
PA3/
A12
PA2/
A11
PA1/
A10
PA0/
A9 Sector
0 0 0 0 0 0 0 0 0 0 X X X 0a
0 0 0 0 0 0 0 0 0 1 X X X 0b
0 0 0 0 0 1 X X X X X X X 1
0 0 0 0 1 0 X X X X X X X 2
●●●●●●●●●●●●● ●
●●●●●●●●●●●●● ●
●●●●●●●●●●●●● ●
1 1 1 1 0 0 X X X X X X X 60
1 1 1 1 0 1 X X X X X X X 61
1 1 1 1 1 0 X X X X X X X 62
1 1 1 1 1 1 X X X X X X X 63
Command Byte 1 Byte 2 Byte 3 Byte 4
Chip erase C7H 94H 80H 9AH
Opcode
Byte 1
Opcode
Byte 2
Opcode
Byte 3
Opcode
Byte 4
CS
Each transition
represents 8 bits
SI
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Atmel AT45DB321D
5.8 Main Memory Page Program through Buffer
This operation is a combination of the buffer write and buffer to main memory page program with built-in erase operations. Data
are first clocked into buffer 1 or buffer 2 from the input pin (SI), and then programmed into a specified page in the main memory.
To perform a main memory page program through buffer for the standard DataFlash page size (528 bytes), a one-byte opcode,
82H for buffer 1 or 85H for buffer 2, must first be clocked into the device, followed by three address bytes. The address bytes
are comprised of 1 don’t care bit, 13 page address bits, (PA12 - PA0) that select the page in the main memory where data is to
be written, and 10 buffer address bits (BFA9 - BFA0) that select the first byte in the buffer to be written. To perform a main
memory page program through buffer for the binary page size (512 bytes), the 82H opcode for buffer 1 or 85H opcode for buffer
2 must be clocked into the device, followed by three address bytes consisting of 2 don’t care bits, 13 page address bits (A21 -
A9) that specify the page in the main memory to be written, and 9 buffer address bits (BFA8 - BFA0) that select the first byte in
the buffer to be written. After all address bytes are clocked in, the part will take data from the input pins and store them in the
specified data buffer. If the end of the buffer is reached, the device will wrap around back to the beginning of the buffer. When
there is a low-to-high transition on the CS pin, the part will first erase the selected page in main memory to all ones, and then
program the data stored in the buffer into that memory page. Both the erase and the programming of the page are internally
self-timed, and should take place in a maximum time of tEP. During this time, the status register and the RDY/BUSY pin will
indicate that the part is busy.
6. Sector Protection
Two protection methods, hardware and software controlled, are provided for protection against inadvertent or erroneous
program and erase cycles. The software controlled method relies on the use of software commands to enable and disable
sector protection, while the hardware controlled method employs the use of the write protect (WP) pin. The selection of which
sectors are to be protected or unprotected against program and erase operations is specified in the nonvolatile sector protection
register. The status of whether or not sector protection has been enabled or disabled by either the software or the hardware
controlled methods can be determined by checking the status register.
6.1 Software Sector Protection
6.1.1 Enable Sector Protection Command
Sectors specified for protection in the sector protection register can be protected from program and erase operations by issuing
the enable sector protection command. To enable sector protection using the software controlled method, the CS pin must first
be asserted, as it would be with any other command. Once the CS pin has been asserted, the appropriate four-byte command
sequence must be clocked in via the input pin (SI). After the last bit of the command sequence has been clocked in, the CS pin
must be deasserted, after which the sector protection will be enabled.
Table 6-1. Enable Sector Protection Command
Figure 6-1. Enable Sector Protection
Command Byte 1 Byte 2 Byte 3 Byte 4
Enable Sector Protection 3DH 2AH 7FH A9H
Opcode
Byte 1
Opcode
Byte 2
Opcode
Byte 3
Opcode
Byte 4
CS
Each transition
represents 8 bits
SI
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6.1.2 Disable Sector Protection Command
To disable sector protection using the software controlled method, the CS pin must first be asserted, as it would be with any
other command. Once the CS pin has been asserted, the appropriate four-byte sequence for the disable sector protection
command must be clocked in via the input pin (SI). After the last bit of the command sequence has been clocked in, the CS pin
must be deasserted, after which the sector protection will be disabled. The WP pin must be in the deasserted state; otherwise,
the disable sector protection command will be ignored.
Table 6-2. Disenable Sector Protection Command
Figure 6-2. Disable Sector Protection
6.1.3 Various Aspects About Software Controlled Protection
Software controlled protection is useful in applications in which the WP pin is not or cannot be controlled by a host processor. In
such instances, the WP pin may be left floating (the WP pin is internally pulled high), and sector protection can be controlled
using the enable sector protection and disable sector protection commands.
If the device is power cycled, then the software controlled protection will be disabled. Once the device is powered up, the enable
sector protection command should be reissued if sector protection is desired and if the WP pin is not used.
7. Hardware Controlled Protection
Sectors specified in the sector protection register for protection, and the sector protection register itself, can be protected from
program and erase operations by asserting the WP pin and keeping the pin in its asserted state. The sector protection register
and any sector specified for protection cannot be erased or reprogrammed as long as the WP pin is asserted. In order to modify
the sector protection register, the WP pin must be deasserted. If the WP pin is permanently connected to GND, then the content
of the sector protection register cannot be changed. If the WP pin is deasserted or permanently connected to VCC, then the
content of the sector protection register can be modified.
The WP pin will override the software controlled protection method, but only for protecting the sectors. For example, if the
sectors were not previously protected by the enable sector protection command, then simply asserting the WP pin would enable
sector protection within the maximum specified tWPE time. However, when the WP pin is deasserted, sector protection would no
longer be enabled (after the maximum specified tWPD time) as long as the enable sector protection command was not issued
while the WP pin was asserted. If the enable sector protection command was issued before or while the WP pin was asserted,
then simply deasserting the WP pin would not disable sector protection. In this case, the disable sector protection command
would need to be issued while the WP pin is deasserted to disable sector protection. The disable sector protection command is
also ignored whenever the WP pin is asserted.
A noise filter is incorporated to help protect against spurious noise that may inadvertently assert or deassert the WP pin.
The table below details the sector protection status for various scenarios of the WP pin, the enable sector protection command,
and the disable sector protection command.
Figure 7-1. WP Pin and Protection Status
Command Byte 1 Byte 2 Byte 3 Byte 4
Disable sector protection 3DH 2AH 7FH 9AH
Opcode
Byte 1
Opcode
Byte 2
Opcode
Byte 3
Opcode
Byte 4
CS
Each transition
represents 8 bits
SI
WP
12
3
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Atmel AT45DB321D
Table 7-1. WP Pin and Protection Status
7.1 Sector Protection Register
The nonvolatile sector protection register specifies which sectors are to be protected or unprotected with either the software or
hardware controlled protection method. The sector protection register contains 64 bytes of data, in which byte locations 0
through 63 contain values that specify whether sectors 0 through 63 will be protected or unprotected. The sector protection
register is user modifiable, and must first be erased before it can be reprogrammed. Table 7-3 illustrates the format of the sector
protection register.
Table 7-2. Sector Protection Register
Note: 1. The default value for bytes 0 through 63 when shipped from Atmel is 00H.
x = don’t care.
7.1.1 Erase Sector Protection Register Command
In order to modify and change the value of the sector protection register, it must first be erased using the erase sector protection
register command.
To erase the sector protection register, the CS pin must first be asserted, as it would be with any other command. Once the CS
pin has been asserted, the appropriate four-byte opcode sequence must be clocked into the device via the SI pin. The four-byte
opcode sequence must start with 3DH, and be followed by 2AH, 7FH, and CFH. After the last bit of the opcode sequence has
been clocked in, the CS pin must be deasserted to initiate the internally self-timed erase cycle. The erasing of the sector
protection register should take place in a maximum time of tPE, during which time the status register will indicate that the device
is busy. If the device is powered down before the completion of the erase cycle, then the contents of the sector protection
register cannot be guaranteed.
Time
Period WP Pin
Enable Sector Protection
Command
Disable Sector
Protection Command
Sector
Protection
Status
Sector
Protection
Register
1 High Command not issued previously
–
Issue command
X
Issue command
–
Disabled
Disabled
Enabled
Read/write
Read/write
Read/write
2 Low X X Enabled Read only
3 High Command issued during period 1 or 2
–
Issue command
Not issued yet
issue command
–
Enabled
Disabled
Enabled
Read/write
Read/write
Read/write
Sector Number 0 (0a, 0b) 1 to 63
Protected
See Table 7-3
FFH
Unprotected 00H
Table 7-3. Sector 0 (0a, 0b)
0a 0b
Bit 3, 2
Data
Value
(Pages 0-7) (Pages 8-127)
Bit 7, 6 Bit 5, 4 Bit 1, 0
Sectors 0a, 0b unprotected 00 00 xx xx 0xH
Protect sector 0a (pages 0-7) 11 00 xx xx CxH
Protect sector 0b (pages 8-127) 00 11 xx xx 3xH
Protect sectors 0a (pages 0-7), 0b (pages 8-127)(1) 11 11 xx xx FxH
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Atmel AT45DB321D
The sector protection register can be erased with sector protection enabled or disabled. Since the erased state (FFH) of each
byte in the sector protection register is used to indicate that a sector is specified for protection, leaving sector protection enabled
during the erasing of the register allows the protection scheme to be more effective in the prevention of accidental programming
or erasing of the device. If for some reason an erroneous program or erase command is sent to the device immediately after
erasing the sector protection register and before the register can be reprogrammed, then the erroneous program or erase
command will not be processed because all sectors will be protected.
Table 7-4. Erase Sector Protection Register Command
Figure 7-2. Erase Sector Protection Register
7.1.2 Program Sector Protection Register Command
Once the sector protection register has been erased, it can be reprogrammed using the program sector protection register
command.
To program the sector protection register, the CS pin must first be asserted, and then the appropriate four-byte opcode
sequence must be clocked into the device via the SI pin. The four-byte opcode sequence must start with 3DH, and be followed
by 2AH, 7FH, and FCH. After the last bit of the opcode sequence has been clocked into the device, the data for the contents of
the sector protection register must be clocked in. As described in Section 7.1, the sector protection register contains 64 bytes of
data, and so 64 bytes must be clocked into the device. The first byte of data corresponds to sector 0, the second byte
corresponds to sector 1, and so on, with the last byte of data corresponding to sector 63.
After the last data byte has been clocked in, the CS pin must be deasserted to initiate the internally self-timed program cycle.
The programming of the sector protection register should take place in a maximum time of tP, during which the status register
will indicate that the device is busy. If the device is powered down during the program cycle, the contents of the sector
protection register cannot be guaranteed.
If the proper number of data bytes is not clocked in before the CS pin is deasserted, then the protection status of the sectors
corresponding to the bytes not clocked in can not be guaranteed. For example, if only the first two bytes are clocked in instead
of the complete 62 bytes, then the protection status of the last 62 sectors cannot be guaranteed. Furthermore, if more than 64
bytes of data are clocked into the device, then the data will wrap back around to the beginning of the register. For instance, if 65
bytes of data are clocked in, then the 65th byte will be stored at byte location 0 of the sector protection register.
If a value other than 00H or FFH is clocked into a byte location of the sector protection register, then the protection status of the
sector corresponding to that byte location cannot be guaranteed. For example, if a value of 17H is clocked into byte location 2 of
the sector protection register, then the protection status of sector 2 cannot be guaranteed.
The sector protection register can be reprogrammed while sector protection is enabled or disabled. Being able to reprogram the
sector protection register with sector protection enabled allows the user to temporarily disable the sector protection of an
individual sector rather than disabling sector protection completely.
The program sector protection register command utilizes the internal SRAM buffer 1 for processing. Therefore, the contents of
buffer 1 will be altered from its previous state when this command is issued.
Table 7-5. Program Sector Protection Register Command
Command Byte 1 Byte 2 Byte 3 Byte 4
Erase sector protection register 3DH 2AH 7FH CFH
Opcode
byte 1
Opcode
byte 2
Opcode
byte 3
Opcode
byte 4
CS
Each transition
represents 8 bits
SI
Command Byte 1 Byte 2 Byte 3 Byte 4
Program sector protection register 3DH 2AH 7FH FCH
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Atmel AT45DB321D
Figure 7-3. Program Sector Protection Register
7.1.3 Read Sector Protection Register Command
To read the sector protection register, the CS pin must first be asserted. Once the CS pin has been asserted, an opcode of 32H
and three dummy bytes must be clocked in via the SI pin. After the last bit of the opcode and dummy bytes has been clocked in,
any additional clock pulses on the SCK pins will result in data for the content of the sector protection register being output on the
SO pin. The first byte corresponds to sector 0 (0a, 0b), the second byte corresponds to sector 1, and the last byte (byte 64)
corresponds to sector 63. Once the last byte of the sector protection register has been clocked out, any additional clock pulses
will result in undefined data being output on the SO pin. The CS pin must be deasserted to terminate the read sector protection
register operation and put the output into a high-impedance state.
Table 7-6. Read Sector Protection Register Command
Note: xx = Dummy byte
Figure 7-4. Read Sector Protection Register
7.1.4 Various Aspects About the Sector Protection Register
The sector protection register is subject to a limit of 10,000 erase/program cycles. Users are encouraged to carefully evaluate
the number of times the sector protection register will be modified during the course of the application’s life cycle. If the
application requires the sector protection register to be modified more than the specified limit of 10,000 cycles because the
application needs to temporarily unprotect individual sectors (sector protection remains enabled while the sector protection
register is reprogrammed), then the application will need to limit this practice. Instead, a combination of temporarily unprotecting
individual sectors, along with disabling sector protection completely, will need to be implemented by the application to ensure
that the limit of 10,000 cycles is not exceeded.
Data byte
n
Opcode
byte 1
Opcode
byte 2
Opcode
byte 3
Opcode
byte 4
Data byte
n + 1
Data byte
n + 63
CS
Each transition
represents 8 bits
SI
Command Byte 1 Byte 2 Byte 3 Byte 4
Read sector protection register 32H xxH xxH xxH
Opcode X X X
Data byte
n
Data byte
n + 1
CS
Data byte
n + 63
SI
SO
Each transition
represents 8 bits
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Atmel AT45DB321D
8. Security Features
8.1 Sector Lockdown
The device incorporates a sector lockdown mechanism that allows each individual sector to be permanently locked so that it
becomes read only. This is useful for applications that require the ability to permanently protect a number of sectors against
malicious attempts at altering program code or security information. Once a sector is locked down, it can never be erased or
programmed, and it can never be unlocked.
To issue the sector lockdown command, the CS pin must first be asserted, as it would be for any other command. Once the CS
pin has been asserted, the appropriate four-byte opcode sequence must be clocked into the device in the correct order. The
four-byte opcode sequence must start with 3DH, and be followed by 2AH, 7FH, and 30H. After the last byte of the command
sequence has been clocked in, three address bytes specifying any address within the sector to be locked down must be clocked
into the device. After the last address bit has been clocked in, the CS pin must be deasserted to initiate the internally self-timed
lockdown sequence.
The lockdown sequence should take place in a maximum time of tP, during which the status register will indicate that the device
is busy. If the device is powered down before the completion of the lockdown sequence, then the lockdown status of the sector
cannot be guaranteed. In this case, it is recommended that the user read the sector lockdown register to determine the status of
the appropriate sector lockdown bits or bytes and reissue the sector lockdown command, if necessary.
Table 8-1. Sector Lockdown
Figure 8-1. Sector Lockdown
8.1.1 Sector Lockdown Register
The nonvolatile sector lockdown register contains 64 bytes of data, as shown below:
Table 8-2. Sector Lockdown Register
Table 8-3. Sector 0 (0a, 0b)
Command Byte 1 Byte 2 Byte 3 Byte 4
Sector lockdown 3DH 2AH 7FH 30H
Opcode
byte 1
Opcode
byte 2
Opcode
byte 3
Opcode
byte 4
CS
Address
bytes
Address
bytes
Address
bytes
Each transition
represents 8 bits
SI
Sector Number 0 (0a, 0b) 1 to 63
Locked
See Table 8-3
FFH
Unlocked 00H
0a
(Pages 0-7)
Bit 7, 6
0b
(Pages 8-127)
Bit 5, 4 Bit 3, 2 Bit 1, 0
Data
Value
Sectors 0a, 0b unlocked 00 00 00 00 00H
Sector 0a locked (pages 0-7) 11 00 00 00 C0H
Sector 0b locked (pages 8-127) 00 11 00 00 30H
Sectors 0a, 0b locked (pages 0-127) 11 11 00 00 F0H
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Atmel AT45DB321D
8.1.2 Reading the Sector Lockdown Register
The sector lockdown register can be read to determine which sectors in the memory array are permanently locked down. To
read the sector lockdown register, the CS pin must first be asserted. Once the CS pin has been asserted, an opcode of 35H and
three dummy bytes must be clocked into the device via the SI pin. After the last bit of the opcode and dummy bytes has been
clocked in, the data for the content of the sector lockdown register will be clocked out on the SO pin. The first byte corresponds
to sector 0 (0a, 0b) the second byte corresponds to sector 1, and the last byte (byte 16) corresponds to sector 15. After the last
byte of the sector lockdown register has been read, additional pulses on the SCK pin will simply result in undefined data being
output on the SO pin.
Deasserting the CS pin will terminate the read sector lockdown register operation and put the SO pin into a high-impedance
state.
Table 8-4 details the values read from the sector lockdown register.
Table 8-4. Sector Lockdown Register
Note: xx = Dummy byte.
Figure 8-2. Read Sector Lockdown Register
8.2 Security Register
The device contains a specialized security register that can be used for purposes such as unique device serialization or locked
key storage. The register is comprised of a total of 128 bytes that are divided into two portions. The first 64 bytes (byte locations
0 through 63) of the security register are allocated as a one-time user programmable space. Once these 64 bytes have been
programmed, they cannot be reprogrammed. The remaining 64 bytes of the register (byte locations 64 through 127) are factory
programmed by Atmel, and contain a unique value for each device. The factory programmed data are fixed and cannot be
changed.
Table 8-5. Security Register
Command Byte 1 Byte 2 Byte 3 Byte 4
Read sector lockdown register 35H xxH xxH xxH
Opcode X X X
Data byte
n
Data byte
n + 1
CS
Data byte
n + 63
SI
SO
Each transition
represents 8 bits
Security Register Byte Number
0 1 · · · 62 63 64 65 · · · 126 127
Data type One-time user programmable Atmel factory programmed
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Atmel AT45DB321D
8.2.1 Programming the Security Register
The user programmable portion of the security register does not need to be erased before it is programmed.
To program the security register, the CS pin must first be asserted, and then the appropriate four-byte opcode sequence must
be clocked into the device in the correct order. The four-byte opcode sequence must start with 9BH, and be followed by 00H,
00H, and 00H. After the last bit of the opcode sequence has been clocked into the device, the data for the content of the 64-byte
user programmable portion of the security register must be clocked in.
After the last data byte has been clocked in, the CS pin must be deasserted to initiate the internally self-timed program cycle.
The programming of the security register should take place in a maximum time of tP, during which the status register will indicate
that the device is busy. If the device is powered down during the program cycle, then the contents of the 64-byte user
programmable portion of the security register cannot be guaranteed.
If the full 64 bytes of data are not clocked in before the CS pin is deasserted, then the values of the byte locations not clocked in
cannot be guaranteed. For example, if only the first two bytes are clocked in instead of the complete 64 bytes, then the
remaining 62 bytes of the user programmable portion of the security register cannot be guaranteed. Furthermore, if more than
64 bytes of data are clocked into the device, then the data will wrap back around to the beginning of the register. For instance, if
65 bytes of data are clocked in, then the 65th byte will be stored at byte location 0 of the security register.
The user programmable portion of the security register can be programmed only once. Therefore, it is not possible to program
only the first two bytes of the register and then program the remaining 62 bytes at a later time.
The program security register command utilizes the internal SRAM buffer 1 for processing. Therefore, the contents of buffer 1
will be altered from its previous state when this command is issued.
Figure 8-3. Program Security Register
8.2.2 Reading the Security Register
The security register can be read by first asserting the CS pin and then clocking in an opcode of 77H, followed by three dummy
bytes. After the last don't care bit has been clocked in, the content of the security register can be clocked out on the SO pin.
After the last byte of the security register has been read, additional pulses on the SCK pin will simply result in undefined data
being output on the SO pin.
Deasserting the CS pin will terminate the read security register operation and put the SO pin into a high-impedance state.
Figure 8-4. Read Security Register
Data byte
n
Opcode
byte 1
Opcode
byte 2
Opcode
byte 3
Opcode
byte 4
Data byte
n + 1
Data byte
n + x
CS
Each transition
represents 8 bits
SI
Opcode X X X
Data byte
n
Data byte
n + 1
CS
Data byte
n + x
Each transition
represents 8 bits
SI
SO
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Atmel AT45DB321D
9. Additional Commands
9.1 Main Memory Page to Buffer Transfer
A page of data can be transferred from the main memory to either buffer 1 or buffer 2. To start the operation for the standard
DataFlash page size (528 bytes), a one-byte opcode, 53H for buffer 1 or 55H for buffer 2, must be clocked into the device,
followed by three address bytes comprised of 1 don’t care bit, 13 page address bits (PA12 - PA0) that specify the page in main
memory that is to be transferred, and 10 don’t care bits. To perform a main memory page to buffer transfer for the binary page
size (512 bytes), the 53H opcode for buffer 1 or 55H opcode for buffer 2 must be clocked into the device, followed by three
address bytes consisting of 2 don’t care bits, 13 page address bits (A21 - A9) that specify the page in the main memory that is
to be transferred, and 9 don’t care bits. The CS pin must be low while toggling the SCK pin to load the opcode and the address
bytes from the input pin (SI). The transfer of page of data from the main memory to the buffer will begin when the CS pin
transitions from a low to a high state. During the transfer of a page of data (tXFR), the status register can be read or the
RDY/BUSY can be monitored to determine whether the transfer has been completed.
9.2 Main Memory Page to Buffer Compare
A page of data in the main memory can be compared to the data in buffer 1 or buffer 2. To initiate the operation for a standard
DataFlash page size (528 bytes), a one-byte opcode, 60H for buffer 1 or 61H for buffer 2, must be clocked into the device,
followed by three address bytes consisting of 1 don’t care bit, 13 page address bits (PA12 - PA0) that specify the page in the
main memory that is to be compared to the buffer, and 10 don’t care bits. To start a main memory page to buffer compare for a
binary page size (512 bytes), the 60H opcode for buffer 1 or 61H opcode for buffer 2 must be clocked into the device, followed
by three address bytes consisting of 2 don’t care bits, 13 page address bits (A21 - A9) that specify the page in the main memory
that is to be compared to the buffer, and 9 don’t care bits. The CS pin must be low while toggling the SCK pin to load the opcode
and the address bytes from the input pin (SI). On the low-to-high transition of the CS pin, the data bytes in the selected main
memory page will be compared with the data bytes in buffer 1 or buffer 2. During this time (tCOMP), the status register and the
RDY/BUSY pin will indicate that the part is busy. On completion of the compare operation, bit 6 of the status register is updated
with the result of the compare.
9.3 Auto Page Rewrite
This mode is needed only when multiple bytes within a page or multiple pages of data are modified in a random fashion within a
sector. This mode is a combination of two operations:
1. Main memory page to buffer transfer, and
2. Buffer to main memory page program, with built-in erase.
A page of data is first transferred from the main memory to buffer 1 or buffer 2, and then the same data (from buffer 1 or buffer
2) are programmed back into their original page of main memory. To start the rewrite operation for the standard DataFlash page
size (528 bytes), a one-byte opcode, 58H for buffer 1 or 59H for buffer 2, must be clocked into the device, followed by three
address bytes comprised of 1 don’t care bit, 13 page address bits (PA12-PA0) that specify the page in main memory to be
rewritten, and 10 don’t care bits. To initiate an auto page rewrite for a binary page size (512 bytes), the 58H opcode for buffer 1
or 59H opcode for buffer 2 must be clocked into the device, followed by three address bytes consisting of 2 don’t care bits, 13
page address bits (A21 - A9) that specify the page in the main memory that is to be written, and 9 don’t care bits. When a low-
to-high transition occurs on the CS pin, the part will first transfer data from the page in main memory to a buffer and then
program the data from the buffer back into same page of main memory. The operation is internally self-timed, and should take
place in a maximum time of tEP. During this time, the status register and the RDY/BUSY pin will indicate that the part is busy.
If a sector is programmed or reprogrammed sequentially page by page, then the programming algorithm shown in Figure 23-1,
page 41 is recommended. Otherwise, if multiple bytes in a page or several pages are programmed randomly in a sector, then
the programming algorithm shown in Figure 23-2, page 42 is recommended. Each page within a sector must be
updated/rewritten at least once within every 20,000 cumulative page erase/program operations in that sector. Please contact
Atmel for availability of devices that are specified to exceed the 20,000 cycle cumulative limit.
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Atmel AT45DB321D
9.4 Status Register Read
The status register can be used to determine the device’s ready/busy status, page size, a main memory page to buffer compare
operation result, the sector protection status, or the device density. The status register can be read at any time, including during
an internally self-timed program or erase operation. To read the status register, the CS pin must be asserted and the opcode of
D7H must be loaded into the device. After the opcode is clocked in, the one-byte status register will be clocked out on the output
pin (SO), starting with the next clock cycle. The data in the status register, starting with the msb (bit 7), will be clocked out on the
SO pin during the next eight clock cycles. After the one byte of the status register has been clocked out, the sequence will
repeat itself (as long as CS remains low and SCK is being toggled). The data in the status register is constantly updated, and so
each repeating sequence will output new data.
Ready/busy status is indicated using bit 7 of the status register. If bit 7 is a one, then the device is not busy and is ready to
accept the next command. If bit 7 is a zero, then the device is in a busy state. Since the data in the status register is constantly
updated, the user must toggle the SCK pin to check the ready/busy status.
There are several operations that can cause the device to be in a busy state:
●Main memory page to buffer transfer
●Main memory page to buffer compare
●Buffer to main memory page program
●Main memory page program through buffer
●Page erase, block erase, sector erase, and chip erase
●Auto page rewrite
The result of the most recent main memory page to buffer compare operation is indicated using bit 6 of the status register. If bit
6 is a zero, then the data in the main memory page matches the data in the buffer. If bit 6 is a one, then at least one bit of the
data in the main memory page does not match the data in the buffer.
Bit 1 of the status register is used to provide information to the user whether sector protection has been enabled or disabled,
either by the software-controlled or hardware-controlled method. A logic one indicates that sector protection has been enabled,
and logic zero indicates that sector protection has been disabled.
Bit 0 o the status register indicates whether the page size of the main memory array is configured for a “power of two” binary
page size (512 bytes) or a standard DataFlash page size (528 bytes). If bit 0 is a one, then the page size is set to 512 bytes. If
bit 0 is a zero, then the page size is set to 528 bytes.
The device density is indicated using bits 5, 4, 3, and 2 of the status register. For the AT45DB321D, the four bits are 1101. The
decimal value of these four binary bits does not equate to the device density — the four bits represent a combinational code
relating to differing densities of DataFlash devices. The device density is not the same as the density code indicated in the
JEDEC device ID information. The device density is provided only for backward compatibility.
Table 9-1. Status Register Format
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
RDY/BUSY COMP 1 1 0 1 Protect Page size
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Atmel AT45DB321D
10. Deep Power-down
After an initial power-up, the device will default to standby mode. The deep power-down command allows the device to enter
into the lowest power-consumption mode. To enter the deep power-down mode, the CS pin must first be asserted. Once the CS
pin has been asserted, an opcode of B9H must be clocked in via the input pin (SI). After the last bit of the command has been
clocked in, the CS pin must be deasserted to initiate deep power-down operation. After the CS pin is deasserted, the device will
enter the deep power-down mode within a maximum time of tEDPD. Once the device has entered the deep power-down mode, all
instructions are ignored, except for the resume from deep power-down commands.
Table 10-1. Deep Power-down
Figure 10-1. Deep Power-down
10.1 Resume from Deep Power-down
The resume from deep power-down command takes the device out of the deep power-down mode and returns it to the normal
standby mode. To resume from deep power-down mode, the CS pin must first be asserted, and an opcode of ABH must be
clocked in via the input pin (SI). After the last bit of the command has been clocked in, the CS pin must be deasserted to
terminate the deep power-down mode. After the CS pin is deasserted, the device will return to the normal standby mode within
a maximum time of tRDPD. The CS pin must remain high during the tRDPD time before the device can receive any commands.
After resuming from deep power-down, the device will return to the normal standby mode.
Table 10-2. Resume from Deep Power-down
Figure 10-2. Resume from Deep Power-Down
Command Opcode
Deep power-down B9H
Opcode
CS
Each transition
represents 8 bits
SI
Command Opcode
Resume from deep power-down ABH
Opcode
CS
Each transition
represents 8 bits
SI
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Atmel AT45DB321D
11. “Power of Two” Binary Page Size Option
“Power of two” binary page size configuration register is a user programmable, nonvolatile register that allows the page size of
the main memory to be configured for binary page size (512 bytes) or standard DataFlash page size (528 bytes). The power of
two page size is a one-time programmable configuration register, and once the device is configured for power of two page size,
it cannot be reconfigured again. The devices are initially shipped with the page size set to 528 bytes. The user has the option of
ordering binary page size (512-byte) devices from the factory. For details, please refer to Section 24. “Ordering Information” on
page 43.
For the binary power of two page size to become effective, the following steps must be followed:
1. Program the one-time programmable configuration resister using the opcode sequence: 3DH, 2AH, 80H, and A6H
(see Section 11.1).
2. Power cycle the device (i.e., power down and power up again).
3. The page for the binary page size can now be programmed.
If the above steps to set the page size prior to page programming are not followed, incorrect data during a read operation may
be encountered.
11.1 Programming the Configuration Register
To program the configuration register for power of two binary page size, the CS pin must first be asserted, as it would be with
any other command. Once the CS pin has been asserted, the appropriate four-byte opcode sequence must be clocked into the
device in the correct order. The four-byte opcode sequence must start with 3DH, followed by 2AH, 80H, and A6H. After the last
bit of the opcode sequence has been clocked in, the CS pin must be deasserted to initiate the internally self-timed program
cycle. The programming of the configuration register should take place in a maximum time of tP, during which time the status
register will indicate that the device is busy. The device must be power cycled after the completion of the program cycle to set
the power of two page size. If the device is powered-down before the completion of the program cycle, then setting the
configuration register cannot be guaranteed. However, the user should check bit 0 of the status register to see whether the
page size was configured for binary page size or not. If not, the command can be issued again.
Table 11-1. Programming the Configuration Register
Figure 11-1. Erase Sector Protection Register
12. Manufacturer and Device ID Read
Identification information can be read from the device to enable systems to electronically query and identify the device while it is
in the system. The identification method and the command opcode comply with the JEDEC standard for “Manufacturer and
Device ID Read Methodology for SPI Compatible Serial Interface Memory Devices.” The type of information that can be read
from the device includes the JEDEC-defined manufacturer ID, the vendor-specific device ID, and the vendor-specific extended
device information.
To read the identification information, the CS pin must first be asserted, and then the opcode of 9FH must be clocked into the
device. After the opcode has been clocked in, the device will begin outputting the identification data on the SO pin during the
subsequent clock cycles. The first byte to be output will be the manufacturer ID, followed by two bytes of device ID information.
The fourth byte output will be the extended device information string length, which will be 00H to indicate that no extended
Command Byte 1 Byte 2 Byte 3 Byte 4
Power of two page size 3DH 2AH 80H A6H
Opcode
byte 1
Opcode
byte 2
Opcode
byte 3
Opcode
byte 4
CS
Each transition
represents 8 bits
SI
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Atmel AT45DB321D
device information follows. As indicated in the JEDEC standard, reading the extended device information string length and any
subsequent data is optional.
Deasserting the CS pin will terminate the manufacturer and device ID read operation and put the SO pin into a high-impedance
state. The CS pin can be deasserted at any time, and does not require that a full byte of data be read.
12.1 Manufacturer and Device ID Information
12.1.1 Byte 1 – Manufacturer ID
12.1.2 Byte 2 – Device ID (Part 1)
12.1.3 Byte 3 – Device ID (Part 2)
12.1.4 Byte 4 – Extended Device Information String Length
Note: Based on JEDEC publication 106 (JEP106), manufacturer ID data can be comprised of any number of bytes.
Some manufacturers may have manufacturer ID codes that are two, three, or even four bytes long, with the first
byte(s) in the sequence being 7FH. A system should detect code 7FH as a “continuation code” and continue to
read manufacturer ID bytes. The first non-7FH byte would signify the last byte of manufacturer ID data. For Atmel
(and some other manufacturers), the manufacturer ID data is comprised of only one byte.
Hex
Value
JEDEC Assigned Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
1FH 0 0 0 1 1 1 1 1 Manufacturer ID 1FH = Atmel
Hex
Value
Family Code Density Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Family code 001 = DataFlash
27H 0 0 1 0 0 1 1 1 Density code 00111 = 32Mb
Hex
Value
MLC Code Product Version Code
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 MLC code 000 = 1-bit/cell technology
00H 0 0 0 0 0 0 0 1 Product version 00001 = Second version
Hex
Value
Byte Count
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
00H 0 0 0 0 0 0 0 0 Byte count 00H = 0 bytes of Information
9FH
Manufacturer ID
Byte 1
Device ID
Byte 2
Device ID
Byte 3
This information would only be output
if the extended device information string length
value was something other than 00H
Extended
device
information
string length
Extended
device
information
Byte x
Extended
device
information
Byte x + 1
CS
1FH 27H 00H 01H Data Data
SI
SO
Opcode
Each transition
represents 8 bits
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Atmel AT45DB321D
12.2 Operation Mode Summary
The commands described previously can be grouped into four different categories to make clearer which commands can be
executed at what times.
Group A commands consist of:
1. Main memory page read
2. Continuous array read
3. Read sector protection register
4. Read sector lockdown register
5. Read security register
Group B commands consist of:
1. Page erase
2. Block erase
3. Sector erase
4. Chip erase
5. Main memory page to buffer 1 (or 2) transfer
6. Main memory page to buffer 1 (or 2) compare
7. Buffer 1 (or 2) to main memory page program, with built-in erase
8. Buffer 1 (or 2) to main memory page program, without built-in erase
9. Main memory page program through buffer 1 (or 2)
10. Auto page rewrite
Group C commands consist of:
1. Buffer 1 (or 2) read
2. Buffer 1 (or 2) write
3. Status register read
4. Manufacturer and device ID read
Group D commands consist of:
1. Erase sector protection register
2. Program sector protection register
3. Sector lockdown
4. Program security register
If a group A command is in progress (not fully completed), then another command from group A, B, C, or D should not be
started. However, during the internally self-timed portion of group B commands, any command in group C can be executed. The
group B commands using buffer 1 should use group C commands using buffer 2, and vice versa. Finally, during the internally
self-timed portion of a group D command, only the status register read command should be executed.
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Atmel AT45DB321D
13. Command Tables
Table 13-1. Read Commands
Table 13-2. Program and Erase Commands
Table 13-3. Protection and Security Commands
Command Opcode
Main memory page read D2H
Continuous array read (legacy command) E8H
Continuous array read (low frequency) 03H
Continuous array read (high frequency) 0BH
Buffer 1 read (low frequency) D1H
Buffer 2 read (low frequency) D3H
Buffer 1 read D4H
Buffer 2 read D6H
Command Opcode
Buffer 1 write 84H
Buffer 2 write 87H
Buffer 1 to main memory page program, with built-in erase 83H
Buffer 2 to main memory page program, with built-in erase 86H
Buffer 1 to main memory page program, without built-in erase 88H
Buffer 2 to main memory page program, without built-in erase 89H
Page erase 81H
Block erase 50H
Sector erase 7CH
Chip erase C7H, 94H, 80H, 9AH
Main memory page program through buffer 1 82H
Main memory page program through buffer 2 85H
Command Opcode
Enable sector protection 3DH + 2AH + 7FH + A9H
Disable sector protection 3DH + 2AH + 7FH + 9AH
Erase sector protection register 3DH + 2AH + 7FH + CFH
Program sector protection register 3DH + 2AH + 7FH + FCH
Read sector protection register 32H
Sector lockdown 3DH + 2AH + 7FH + 30H
Read sector lockdown register 35H
Program security register 9BH + 00H + 00H + 00H
Read security register 77H
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Atmel AT45DB321D
Table 13-4. Additional Commands
Table 13-5. Legacy Commands(1)
Note: 1. These legacy commands are not recommended for new designs.
Command Opcode
Main memory page to buffer 1 transfer 53H
Main memory page to buffer 2 transfer 55H
Main memory page to buffer 1 compare 60H
Main memory page to buffer 2 compare 61H
Auto page rewrite through buffer 1 58H
Auto page rewrite through buffer 2 59H
Deep power-down B9H
Resume from deep power-down ABH
Status register read D7H
Manufacturer and device ID read 9FH
Command Opcode
Buffer 1 read 54H
Buffer 2 read 56H
Main memory page read 52H
Continuous array read 68H
Status register read 57H
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Atmel AT45DB321D
Table 13-6. Detailed Bit-level Addressing Sequence for Binary Page Size (512 Bytes)
Note: x = Don’t care.
Page Size = 512-bytes Address Byte Address Byte Address Byte
Additional
Don’t Care
Bytes
Opcode Opcode
Reserved
Reserved
A21
A20
A19
A18
A17
A16
A15
A14
A13
A12
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
03h 0 0 0 0 0 0 1 1 x x A A A A A A A A A A A A A A A A A A A A A A N/A
0Bh 000 01011 x xAAAAAAAAAAAAAAAAAAAAAA 1
50h 0 1 0 1 0 0 0 0 x x A A A A A A A A A A x x x x x x x x x x x x N/A
53h 0 1 0 1 0 0 1 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
55h 0 1 0 1 0 1 0 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
58h 0 1 0 1 1 0 0 0 x x A A A A A A A A A A A A A x x x x x x x x x N/A
59h 0 1 0 1 1 0 0 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
60h 0 1 1 0 0 0 0 0 x x A A A A A A A A A A A A A x x x x x x x x x N/A
61h 0 1 1 0 0 0 0 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
77h 01110111xxxxxxxxxxxxxxxxxxxxxxxx N/A
7Ch 0 1 1 1 1 1 0 0 x x A A A A A A x x x x x x x x x x x x x x x x N/A
81h 1 0 0 0 0 0 0 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
82h 1 0 0 0 0 0 1 0 x x A A A A A A A A A A A A A A A A A A A A A A N/A
83h 1 0 0 0 0 0 1 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
84h 1 0 0 0 0 1 0 0 x x x x x x x x x x x x x x x A A A A A A A A A N/A
85h 1 0 0 0 0 1 0 1 x x A A A A A A A A A A A A A A A A A A A A A A N/A
86h 1 0 0 0 0 1 1 0 x x A A A A A A A A A A A A A x x x x x x x x x N/A
87h 1 0 0 0 0 1 1 1 x x x x x x x x x x x x x x x A A A A A A A A A N/A
88h 1 0 0 0 1 0 0 0 x x A A A A A A A A A A A A A x x x x x x x x x N/A
89h 1 0 0 0 1 0 0 1 x x A A A A A A A A A A A A A x x x x x x x x x N/A
9Fh 1 0 0 1 1 1 1 1 N/A N/A N/A N/A
B9h 1 0 1 1 1 0 0 1 N/A N/A N/A N/A
ABh 1 0 1 0 1 0 1 1 N/A N/A N/A N/A
D1h 1 1 0 1 0 0 0 1 x x x x x x x x x x x x x x x A A A A A A A A A N/A
D2h 11010010 x xAAAAAAAAAAAAAAAAAAAAAA 4
D3h 1 1 0 1 0 0 1 1 x x x x x x x x x x x x x x x A A A A A A A A A N/A
D4h 1 1 0 1 0 1 0 0 x x x x x x x x x x x x x x x A A A A A A A A A 1
D6h 1 1 0 1 0 1 1 0 x x x x x x x x x x x x x x x A A A A A A A A A 1
D7h 1 1 0 1 0 1 1 1 N/A N/A N/A N/A
E8h 111 01000 x xAAAAAAAAAAAAAAAAAAAAAA 4
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Atmel AT45DB321D
Table 13-7. Detailed Bit-level Addressing Sequence for Standard DataFlash Page Size (528 Bytes)
Note: P = Page address bit.
B = Byte/buffer address bit.
x = Don’t care.
Page Size = 528-bytes Address Byte Address Byte Address Byte
Additional
Don’t Care
Bytes
Opcode Opcode
Reserved
PA12
PA11
PA10
PA9
PA8
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
BA9
BA8
BA7
BA6
BA5
BA4
BA3
BA2
BA1
BA0
03h 0 0000011 xPPPPPPPPPPPPPBBBBBBBBBB N/A
0Bh 0 00 01 01 1 xPPPPPPPPPPPPPBBBBBBBBBB 1
50h 0 1 0 1 0 0 0 0 x P P P P P P P P P P x x x x x x x x x x x x x N/A
53h 0 1 0 1 0 0 1 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
55h 0 1 0 1 0 1 0 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
58h 0 1 0 1 1 0 0 0 x P P P P P P P P P P P P P x x x x x x x x x x N/A
59h 0 1 0 1 1 0 0 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
60h 0 1 1 0 0 0 0 0 x P P P P P P P P P P P P P x x x x x x x x x x N/A
61h 0 1 1 0 0 0 0 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
77h 01110111xxxxxxxxxxxxxxxxxxxxxxxx N/A
7Ch 0 1 1 1 1 1 0 0 x P P P P P P x x x x x x x x x x x x x x x x x N/A
81h 1 0 0 0 0 0 0 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
82h 1 00 00010 xPPPPPPPPPPPPPBBBBBBBBBB N/A
83h 1 0 0 0 0 0 1 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
84h 1 0 0 0 0 1 0 0 x x x x x x x x x x x x x x B B B B B B B B B B N/A
85h 1 00 00101 xPPPPPPPPPPPPPBBBBBBBBBB N/A
86h 1 0 0 0 0 1 1 0 x P P P P P P P P P P P P P x x x x x x x x x x N/A
87h 1 0 0 0 0 1 1 1 x x x x x x x x x x x x x x B B B B B B B B B B N/A
88h 1 0 0 0 1 0 0 0 x P P P P P P P P P P P P P x x x x x x x x x x N/A
89h 1 0 0 0 1 0 0 1 x P P P P P P P P P P P P P x x x x x x x x x x N/A
9Fh 1 0 0 1 1 1 1 1 N/A N/A N/A N/A
B9h 1 0 1 1 1 0 0 1 N/A N/A N/A N/A
ABh 1 0 1 0 1 0 1 1 N/A N/A N/A N/A
D1h 1 1 0 1 0 0 0 1 x x x x x x x x x x x x x x B B B B B B B B B B N/A
D2h 1 10 10 01 0 xPPPPPPPPPPPPPBBBBBBBBBB 4
D3h 1 1 0 1 0 0 0 1 x x x x x x x x x x x x x x B B B B B B B B B B N/A
D4h 1 1 0 1 0 1 0 0 x x x x x x x x x x x x x x B B B B B B B B B B 1
D6h 1 1 0 1 0 1 1 0 x x x x x x x x x x x x x x B B B B B B B B B B 1
D7h 1 1 0 1 0 1 1 1 N/A N/A N/A N/A
E8h 1 11 01 00 0 xPPPPPPPPPPPPPBBBBBBBBBB 4
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14. Power-on/Reset State
When power is first applied to the device, or when recovering from a reset condition, the device will default to Mode 3. In
addition, the output pin (SO) will be in a high-impedance state, and a high-to-low transition on the CS pin will be required to start
a valid instruction. The mode (Mode 3 or Mode 0) will be automatically selected on every falling edge of CS by sampling the
inactive clock state.
14.1 Initial Power-up/Reset Timing Restrictions
At power-up, the device must not be selected until the supply voltage reaches VCC (min.) and a further delay of tVCSL. During
power-up, the internal power-on reset circuitry keeps the device in reset mode until VCC rises above the power-on reset
threshold value (VPOR). At this time, all operations are disabled and the device does not respond to any commands. After power-
up is applied and VCC is at the minimum operating voltage, VCC (min.), the tVCSL delay is required before the device can be
selected in order to perform a read operation.
Similarly, the tPUW delay is required after VCC rises above the power-on reset threshold value (VPOR) before the device can
perform a write (program or erase) operation. After initial power-up, the device will default to standby mode.
Table 14-1. Initial Power-up/Reset Timing Restrictions
15. System Considerations
The RapidS serial interface is controlled by the SCK clock, SI serial input, and CS chip select pins. These signals must rise and
fall monotonically and be free from noise. Excessive noise or ringing on these pins can be misinterpreted as multiple edges and
cause improper operation of the device. The PC board traces must be kept to a minimum distance or appropriately terminated
to ensure proper operation. If necessary, decoupling capacitors can be added on these pins to provide filtering against noise
glitches.
As system complexity continues to increase, voltage regulation is becoming more important. A key element of any voltage
regulation scheme is its current sourcing capability. Like all flash memories, the peak current for a DataFlash device occurs
during the programming and erase operation. The regulator needs to supply this peak current requirement. An under-specified
regulator can cause current starvation. Besides increasing system noise, current starvation during programming or erase can
lead to improper operation and possible data corruption.
Symbol Parameter Min Typ Max Unit
tVCSL VCC (min.) to chip select low 70 μs
tPUW Power-up device delay before write allowed 20 ms
VPOR Power-on reset voltage 1.5 2.5 V
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Atmel AT45DB321D
16. Electrical Specifications
Table 16-1. DC and AC Operating Range
Table 16-2. DC Characteristics
Notes: 1. ICC1 during a buffer read is 20mA, maximum, @ 20MHz.
2. All inputs (SI, SCK, CS#, WP#, and RESET#) are guaranteed by design to be 5V tolerant.
Temperature under bias . . . . . . . . -55C to +125C
Storage temperature . . . . . . . . . . . -65C to +150C
All input voltages (except VCC but including NC pins)
with respect to ground . . . . . . . . . . . -0.6V to +6.25V
All output voltages
with respect to ground . . . . . . . . -0.6V to VCC + 0.6V
*NOTICE: Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent damage
to the device. The "Absolute Maximum Ratings"
are stress ratings only, and functional operation of
the device at these or any other conditions beyond
those indicated in the operational sections of this
specification is not implied. Exposure to absolute
maximum rating conditions for extended periods
may affect device reliability. Voltage Extremes
referenced in the "Absolute Maximum Ratings" are
intended to accommodate short duration
undershoot/overshoot conditions and does not
imply or guarantee functional device operation at
these levels for any extended period of time.
Atmel AT45DB321D (2.5V Version) Atmel AT45DB321D
Operating temperature (case) -40°C to 85°C -40C to 85C
VCC power supply 2.5V to 3.6V 2.7V to 3.6V
Symbol Parameter Condition Min Typ Max Unit
IDP Deep power-down current CS, RESET, WP = VIH,
all inputs at CMOS levels 15 25 μA
ISB Standby current CS, RESET, WP = VIH,
all inputs at CMOS levels 25 50 µA
ICC1(1) Active current, read operation
f = 20MHz; IOUT = 0mA;
VCC = 3.6V 7 10 mA
f = 33MHz; IOUT = 0mA;
VCC = 3.6V 8 12 mA
f = 50MHz; IOUT = 0mA;
VCC = 3.6V 10 14 mA
f = 66MHz; IOUT = 0mA;
VCC = 3.6V 11 15 mA
ICC2
Active current, program/erase
operation VCC = 3.6V 12 17 mA
ILI Input load current VIN = CMOS levels 1 µA
ILO Output leakage current VI/O = CMOS levels 1 µA
VIL Input low voltage VCC × 0.3 V
VIH Input high voltage VCC × 0.7 V
VOL Output low voltage IOL = 1.6mA; VCC = 2.7V 0.4 V
VOH Output high voltage IOH = -100µA VCC - 0.2V V
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Table 16-3. AC Characteristics – Atmel RapidS / Serial Interface
Symbol Parameter
Atmel AT45DB321D
(2.5V Version) Atmel AT45DB321D
Min Typ Max Min Typ Max Unit
fSCK SCK frequency 50 66 MHz
fCAR1 SCK frequency for continuous array read 50 66 MHz
fCAR2
SCK frequency for continuous array read
(Low frequency) 33 33 MHz
tWH SCK high time 6.8 6.8 ns
tWL SCK low time 6.8 6.8 ns
tSCKR(1) SCK rise time, peak-to-peak (slew rate) 0.1 0.1 V/ns
tSCKF(1) SCK fall time, peak-to-peak (slew rate) 0.1 0.1 V/ns
tCS Minimum CS high time 50 50 ns
tCSS CS setup time 5 5 ns
tCSH CS hold time 5 5 ns
tCSB CS high to RDY/BUSY low 100 100 ns
tSU Data in setup time 2 2 ns
tHData in hold time 3 3 ns
tHO Output hold time 0 0 ns
tDIS Output disable time 27 35 27 35 ns
tVOutput valid 8 6 ns
tWPE WP low to protection enabled 1 1 μs
tWPD WP high to protection disabled 1 1 μs
tEDPD CS high to deep power-down mode 3 3 μs
tRDPD CS high to standby mode 35 35 μs
tXFR Page to buffer transfer time 300 300 µs
tcomp Page to buffer compare time 300 300 µs
tEP
Page erase and programming time
(512-/528-bytes) 17 40 17 40 ms
tPPage programming time (512/528 bytes) 3 6 3 6 ms
tPE Page erase time (512/528 bytes) 15 35 15 35 ms
tBE Block erase time (4,096/4,224 bytes) 45 100 45 100 ms
tSE Sector erase time (131,072/135,168 bytes) 1.6 5 1.6 5 s
tCE Chip erase time TBD TBD TBD TBD s
tRST RESET pulse width 10 10 µs
tREC RESET recovery time 1 1 µs
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Atmel AT45DB321D
17. Input Test Waveforms and Measurement Levels
tR, tF < 2ns (10% to 90%)
18. Output Test Load
19. AC Waveforms
Six different timing waveforms are shown on page 31. Waveform 1 shows the SCK signal being low when CS makes a high-to-
low transition, and waveform 2 shows the SCK signal being high when CS makes a high-to-low transition. In both cases, output
SO becomes valid while the SCK signal is still low (SCK low time is specified as tWL). Timing waveforms 1 and 2 conform to
RapidS serial interface, but for frequencies up to 66MHz. Waveforms 1 and 2 are compatible with SPI Mode 0 and SPI Mode 3,
respectively.
Waveform 3 and waveform 4 illustrate general timing diagram for RapidS serial interface. These are similar to waveform 1 and
waveform 2, except that output SO is not restricted to become valid during the tWL period. These timing waveforms are valid
over the full frequency range (maximum frequency = 66MHz) of the RapidS serial case.
Table 19-1. Waveform 1 – SPI Mode 0 Compatible (for frequencies up to 66MHz)
AC
Driving
Levels
AC
Measurement
Level
0.45V
1.5V
2.4V
Device
under
test
30pF
CS
SCK
SI
SO
tCSS
Valid in
tH
tSU
tWH tWL tCSH
tCS
tV
High impedance Valid out
tHO tDIS
High impedance
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3597Q–DFLASH–6/11
Atmel AT45DB321D
Table 19-2. Waveform 2 – SPI Mode 3 Compatible (for frequencies up to 66MHz)
Table 19-3. Waveform 3 – Atmel RapidS Mode 0 (FMAX = 66MHz)
Table 19-4. Waveform 4 – Atmel RapidS Mode 3 (FMAX = 66MHz)
CS
SCK
SO
t
CSS
Valid in
t
H
t
SU
t
WL
t
WH
t
CSH
t
CS
t
V
High Z Valid out
t
HO
t
DIS
High impedance
SI
CS
SCK
SI
SO
tCSS
Valid in
tH
tSU
tWH tWL tCSH
tCS
tV
High impedance Valid out
tHO tDIS
High impedance
CS
SCK
SO
t
CSS
Valid in
t
H
t
SU
t
WL
t
WH
t
CSH
t
CS
t
V
High Z Valid out
t
HO
t
DIS
High impedance
SI
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3597Q–DFLASH–6/11
Atmel AT45DB321D
19.1 Utilizing the Atmel RapidS Function
To take advantage of the RapidS function's ability to operate at higher clock frequencies, a full clock cycle must be used to
transmit data back and forth across the serial bus. The DataFlash device is designed to always clock its data out on the falling
edge of the SCK signal and clock data in on the rising edge of SCK.
For full clock cycle operation to be achieved when the DataFlash device is clocking data out on the falling edge of SCK, the host
controller should wait until the next falling edge of SCK to latch the data in. Similarly, the host controller should clock its data out
on the rising edge of SCK in order to give the DataFlash device a full clock cycle to latch the incoming data in on the next rising
edge of SCK.
Figure 19-1. Atmel RapidS Mode
Figure 19-2. Reset Timing
Note: The CS signal should be in the high state before the RESET signal is deasserted.
SCK
MOSI
MISO
1234567812345678
MOSI = Master Out, Slave In
MISO = Master In, Slave Out
The Master is the host controller and the Slave is the DataFlash
The Master always clocks data out on the rising edge of SCK and always clocks data in on the falling edge of SCK.
The Slave always clocks data out on the falling edge of SCK and always clocks data in on the rising edge of SCK.
A. Master clocks out first bit of BYTE-MOSI on the rising edge of SCK
B. Slave clocks in first bit of BYTE-MOSI on the next rising edge of SCK
C. Master clocks out second bit of BYTE-MOSI on the same rising edge of SCK
D. Last bit of BYTE-MOSI is clocked out from the Master
E. Last bit of BYTE-MOSI is clocked into the slave
F. Slave clocks out first bit of BYTE-SO
G. Master clocks in first bit of BYTE-SO
H. Slave clocks out second bit of BYTE-SO
I. Master clocks in last bit of BYTE-SO
ABC D E
FG
1
H
BYTE-MOSI
MSB LSB
BYTE-SO
MSB LSB
Slave CS
I
CS
SCK
RESET
SO (OUTPUT) High impedance High impedance
SI (INPUT)
tRST
tREC tCSS
34
3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 19-3. Command Sequence for Read/Write Operations for a 512-Byte Page Size
(Except Status Register Read, Manufacturer, and Device ID Read)
Figure 19-4. Command Sequence for Read/Write Operations for a 528-Byte Page Size
(Except Status Register Read, Manufacturer, and Device ID Read)
20. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
Figure 20-1. Block Diagram
SI (INPUT) CMD 8-bits 8-bits 8-bits
Page address
(A21 - A9)
X X X X X X X X X X X X X X X X LSB
X X X X X X X X
Byte/Buffer address
(A8 - A0/BFA8 - BFA0)
MSB
Don’t care
bits
Page address
(PA12 - PA0)
Byte/Buffer address
(BA9 - BA0/BFA9 - BFA0)
SI (INPUT) CMD 8-bits 8-bits 8-bits
X X X XX X X X X X X X LSB
X X X X X X X X
MSB
1 Don’t care
bit
X X X X
Flash Memory Array
Page (512-/528-bytes)
Buffer 2 (512-/528-bytes)Buffer 1 (512-/528-bytes)
I/O Interface
SI
Buffer 1 to
Main Memory
Page Program
Buffer 2 to
Main Memory
Page Program
Buffer 1
WRITE
Buffer 2
WRITE
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3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 20-2. Buffer Write
Figure 20-3. Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
21. Read Operations
The following block diagram and waveforms illustrate the various read sequences available.
Figure 21-1. Block Diagram
SI (INPUT)
CMD
Completes writing into selected buffer
CS
X
X···X, BFA9-8
BFA7-0
nn+1 Last byte
Binary Page Size
15 don't care + BFA8-BFA0
SI (INPUT) CMD
PA12-6 PA5-0, XX
CS
Starts self-timed erase/program operation
XXXX XX
Each transition
represents 8 bits
n = 1st byte read
n+1 = 2nd byte read
Binary Page Size
A21-A9 + 9 don't care bits
Flash Memory Array
Page (512-/528-bytes)
Buffer 2 (512-/528-bytes)Buffer 1 (512-/528-bytes)
I/O Interface
Main Memory
Page to
Buffer 1
Main Memory
Page to
Buffer 2
Main Memory
Page Read
Buffer 1
Read
Buffer 2
Read
SO
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3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 21-2. Main Memory Page Read
Figure 21-3. Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)
Figure 21-4. Buffer Read
SI (INPUT)
CMD PA12-6 PA5-0, BA9-8
X
CS
n n+1
SO (OUTPUT)
BA7-0
4 Dummy bytes
X
Address for Binary Page Size
A21-A16 A15-A8 A7-A0
Starts reading page data into buffer
SI (INPUT)
CMD PA12-6 PA5-0, XX
CS
SO (OUTPUT)
XXXX XXXX
Binary Page Size
A21-a9 + 9 Don't care bits
CMD
CS
n n+1
X
XX..X, BFA9-8 BFA7- 0
Binary Page Size
15 Don't care + Bfa8-bfa0
Each transition
represents 8 bits
SI (INPUT)
SO (OUTPUT)
No dummy byte (opcodes D1H and D3H)
1 dummy byte (opcodes D4H and D6H)
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Atmel AT45DB321D
22. Detailed Bit-level Read Waveform –
Atmel RapidS Serial Interface Mode 0/Mode 3
Figure 22-1. Continuous Array Read (Legacy Opcode E8H)
Figure 22-2. Continuous Array Read (Opcode 0BH)
Figure 22-3. Continuous Array Read (Low Frequency: Opcode 03H)
SCK
CS
SI
SO
MSB MSB
2310
11101000
675410119812 63666765646233 3431 3229 30 68 71 727069
OPCODE
AAAA AAAAA
MSB
XXXX XX
MSB MSB
DDDDDDDDDD
Address bits 32 Don't care bits
Data byte 1
High-impedance
Bit 4095/4223
of Page N
Bit 0 of
Page N+1
S
CK
CS
SI
SO
MSB MSB
2310
00001011
675410119812 39424341403833 3431 3229 30 44 47 484645
OPCODE
AAAA AAAAA
MSB
XXXX XX
MSB MSB
DDDDDDDDDD
Address bits a21 - a0 Don't care
Data byte 1
High-impedance
36 3735
XX
SCK
CS
SI
SO
MSB MSB
2310
00000011
675410119812 373833 36353431 3229 30 39 40
OPCODE
AAAA AAAAA
MSB MSB
DDDDDDDDDD
Address bits a21-a0
Data byte 1
High-impedance
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3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 22-4. Main Memory Page Read (Opcode: D2H)
Figure 22-5. Buffer Read (Opcode D4H or D6H)
Figure 22-6. Buffer Read (Low Frequency: Opcode D1H or D3H)
SCK
CS
SI
SO
MSB MSB
2310
11010010
675410119812 63666765646233 3431 3229 30 68 71 727069
OPCODE
AAAA AAAAA
MSB
XXXX XX
MSB MSB
DDDDDDDDDD
Address bits 32 don't care bits
Data byte 1
High-impedance
SCK
CS
SI
SO
MSB MSB
2310
11010100
675410119812 394243414037 3833 36353431 3229 30 44 47 484645
OPCODE
XXXX AAAXX
MSB
XXXXXXXX
MSB MSB
DDDDDDDDDD
Address bits
Binary page size = 15 don't care + BFA8-BFA0
Standard dataflash page size =
14 don't care + BFA9-BFA0 Don't care
Data byte 1
High-impedance
SCK
CS
SI
SO
MSB MSB
2310
11010001
675410119812 373833 36353431 3229 30 39 40
OPCODE
XXXX AAAXX
MSB MSB
DDDDDDDDDD
Data byte 1
High-impedance
Address bits
Binary page size = 15 don't care + BFA8-BFA0
Standard Atmel Dataflash page size =
14 don't care + BFA9-BFA0
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3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 22-7. Read Sector Protection Register (Opcode 32H)
Figure 22-8. Read Sector Lockdown Register (Opcode 35H)
Figure 22-9. Read Security Register (Opcode 77H)
SCK
CS
SI
SO
MSB MSB
2310
00110010
675410119812 373833 36353431 3229 30 39 40
OPCODE
XXXX XXXXX
MSB MSB
DDDDDDDDD
Don't care
Data byte 1
High-impedance
SCK
CS
SI
SO
MSB MSB
2310
00110101
675410119812 373833 36353431 3229 30 39 40
OPCODE
XXXX XXXXX
MSB MSB
DDDDDDDDD
Don't care
Data byte 1
High-impedance
SCK
CS
SI
SO
MSB MSB
2310
01110111
675410119812 373833 36353431 3229 30 39 40
OPCODE
XXXX XXXXX
MSB MSB
DDDDDDDDD
Don't care
Data byte 1
High-impedance
40
3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 22-10.Status Register Read (Opcode D7H)
Figure 22-11.Manufacturer and Device Read (Opcode 9FH)
SCK
CS
SI
SO
MSB
2310
11010111
675410119812 212217 20191815 1613 14 23 24
OPCODE
MSB MSB
DDDDDD DDDD
MSB
DDDDDDDD
Status register data Status register data
High-impedance
SCK
CS
SI
SO
60
9FH
87 38
OPCODE
1FH Device Id byte 1 Device Id byte 2 00H
High-impedance
14 1615 22 2423 30 3231
Note: Each transition shown for SI and SO represents one byte (8 bits)
41
3597Q–DFLASH–6/11
Atmel AT45DB321D
23. Auto Page Rewrite Flowchart
Figure 23-1. Algorithm for Programming or Reprogramming of the Entire Array Sequentially
Notes: 1. This type of algorithm is used for applications in which the entire array is programmed sequentially, filling the array
page by page.
2. A page can be written using either a main memory page program operation, or a buffer write operation followed by
a buffer to main memory page program operation.
3. The algorithm above shows the programming of a single page. The algorithm will be repeated sequentially for
each page within the entire array.
START
Main Memory Page Program
through Buffer
(82h, 85h)
END
Provide Address
and Data
Buffer Write
(84h, 87h)
Buffer to Main
Memory Page Program
(83h, 86h)
42
3597Q–DFLASH–6/11
Atmel AT45DB321D
Figure 23-2. Algorithm for Randomly Modifying Data
Notes: 1. To preserve data integrity, each page of an Atmel DataFlash sector must be updated/rewritten at least once within
every 20,000 cumulative page erase and program operations.
2. A page address pointer must be maintained to indicate which page is to be rewritten. The auto page rewrite com-
mand must use the address specified by the page address pointer.
3. Other algorithms can be used to rewrite portions of the flash array. Low-power applications may choose to wait
until 20,000 cumulative page erase and program operations have accumulated before rewriting all pages of the
sector. See application note AN-4 (“Using Atmel Serial DataFlash”) for more details.
START
Main Memory Page
to Buffer Transfer
(53h, 55h)
Increment Page
Address Pointer(2)
Auto Page Rewrite(2)
(58h, 59h)
END
provide address of
page to modify
If planning to modify multiple
bytes currently stored within
a page of the Flash array
Main Memory Page Program
through Buffer
(82h, 85h)
Buffer Write
(84h, 87h)
Buffer to Main
Memory Page Program
(83h, 86h)
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3597Q–DFLASH–6/11
Atmel AT45DB321D
24. Ordering Information
Ordering Code Detail
Green Package Options (Pb/Halide-free/RoHS Compliant)
Notes: 1. The shipping carrier option is not marked on the devices.
2. Standard parts are shipped with the page size set to 528 bytes.
The user is able to configure these parts to a 512-byte page size, if desired.
3. Parts ordered with suffix SL954 are shipped in bulk, with the page size set to 512 bytes.
Parts will have “954” or “SL954” marked on them.
4. Parts ordered with suffix SL955 are shipped in tape and reel, with the page size set to 512 bytes.
Parts will have “955” or “SL955” marked on them.
Ordering Code(1)(2) Package Lead Finish
Operating
Voltage fSCK (MHz) Operation Range
AT45DB321D-MU
AT45DB321D-MU-SL954(3)
AT45DB321D-MU-SL955(4)
8M1-A
Matte Sn 2.7V to 3.6V 66
Industrial
(-40C to 85C)
2.7V to 3.6V
AT45DB321D-MWU
AT45DB321D-MWU-SL954(3)
AT45DB321D-MWU-SL955(4)
8MW
AT45DB321D-SU
AT45DB321D-SU-SL954(3)
AT45DB321D-SU-SL955(4)
8S2
AT45DB321D-TU 28T
AT45DB321D-CU 24C3 Matte Sn 2.7V to 3.6V 66
AT45DB321D-MU-2.5 8M1-A Matte Sn 2.5V to 3.6V 50
AT45DB321D-SU-2.5 8S2
Package Type
8M1-A 8-pad, 6 x 5 x 1.0mm, very thin micro lead-frame package MLF™ (VDFN)
8MW 8-pad, 8 x 6 x 1.0mm, very thin micro lead-frame package MLF (VDFN)
8S2 8-lead, 0.209in-wide, plastic gull wing small outline package (EIAJ SOIC)
28T 28-lead, 8mm x 13.4mm, plastic thin small outline package, type I (TSOP)
24C3 24-ball, 6mm x 8mm x 1.4mm ball grid array with a 1mm pitch 5 x 5 ball matrix
AT45D 32 MWU1D–B
A
tmel Designator
Product Family
Device Density
32 = 32-megabit
Interface
1 = Serial
Package Option
M = 8-pad, 6 x 5 x 1mm MLF (VDFN)
MW = 8-pad, 8 x 6 x 1mm MLF (VDFN)
S = 8-lead, 0.209" wide SOIC
T = 28-lead, TSOP
Device Grade
U = Matte Sn lead finish, industrial
temperature range (-40°C to +85°C)
Device Revision
C = 24 Ball BGA
44
3597Q–DFLASH–6/11
Atmel AT45DB321D
25. Packaging Information
8M1-A – MLF (VDFN)
TITLE DRAWING NO. GPC REV.
Package Drawing Contact:
packagedrawings@atmel.com
8M1-A, 8-pad, 6 x 5 x 1.00mm Body, Thermally
Enhanced Plastic Very Thin Dual Flat No
Lead Package (VDFN)
D
8M1-AYBR
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A – 0.85 1.00
A1 – – 0.05
A2 0.65 TYP
A3 0.20 TYP
b 0.35 0.40 0.48
D 5.90 6.00 6.10
D1 5.70 5.75 5.80
D2 3.20 3.40 3.60
E 4.90 5.00 5.10
E1 4.70 4.75 4.80
E2 3.80 4.00 4.20
e 1.27
L 0.50 0.60 0.75
– – 12
o
K 0.25 – –
Pin 1 ID
TOP VIEW
Pin #1 Notch
(0.20 R)
BOTTOM VIEW
D2
E2
L
b
D1
D
E1
E
e
A3
A2
A1
A
0.08 C
0
SIDE VIEW
0
K
0.45
8/28/08
45
3597Q–DFLASH–6/11
Atmel AT45DB321D
8MW – MLF (VDFN)
TITLE DR A WING N O . RE V .
8MW, 8-pad, 8 x 6 x 1.0mm Body, Very Thin Dual Flat Package
No Lead (MLF) B
8MW
5/25/06
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX N O T E
A – – 1.00
A1 – – 0.05
b 0.35 0.40 0.48
D 7.90 8.00 8.10
D1 6.30 6.40 6.50
E 5.90 6.00 6.10
E1 4.70 4.80 4.90
e 1.27
L 0.45 0.50 0.55
K 0.30 REF
Pin 1 ID
TOP VIEW
Pin #1 ID
BOTTOM VIEW
D1
E1
L
b
D
E
e
A1
A
SIDE VIEW
K
1
Pin #1
Cham f e r
(C 0.30)
Option A
Pin #1
Notch
(0.20 R)
Option B
Package Drawing Contact:
packagedrawings@atmel.com
46
3597Q–DFLASH–6/11
Atmel AT45DB321D
8S2 – EIAJ SOIC
Package Drawing Contact:
packagedrawings@atmel.com
DRAWING NO. REV. TITLE GPC
1
1
N
N
E
E
q
q
C
C
E1
E1
L
L
A
A
b
b
A1
A1
e
e
D
D
Notes: 1. This drawing is for general information only; refer to
EIAJ Drawing EDR-7320 for additional information.
2. Mismatch of the upper and lower dies and resin burrs
are not included.
3. Determines the true geometric position.
4. Values b,C apply to plated terminal. The standard
thickness of the plating layer shall measure between
0.007 to .021mm.
8S2 F
4/15/08
8S2, 8-lead, 0.208” Body, Plastic Small
Outline Package (EIAJ) STN
End View
Top View
Side View
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
1.70
0.05
0.35
0.15
5.13
5.18
7.70
0.51
0˚
A
A1
b
C
D
E1
E
L
q
e 1.27 BSC
2.16
0.25
0.48
0.35
5.35
5.40
8.26
0.85
8˚
4
4
2
3
47
3597Q–DFLASH–6/11
Atmel AT45DB321D
28T – TSOP, Type 1
TITLE DRAWING NO. REV.
28T, 28-lead (8 x 13.4mm) Plastic Thin Small Outline
Package, Type I (TSOP) C
28T
12/06/02
PIN 1 0º ~ 5º
D1 D
Pin 1 Identifier Area
b
e
EA
A1
A2
c
L
GAGE PLANE
SEATING PLANE
L1
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This package conforms to JEDEC reference MO-183.
2. Dimensions D1 and E do not include mold protrusion. Allowable
protrusion on E is 0.15mm per side and on D1 is 0.25mm per side.
3. Lead coplanarity is 0.10mm maximum.
A – – 1.20
A1 0.05 – 0.15
A2 0.90 1.00 1.05
D 13.20 13.40 13.60
D1 11.70 11.80 11.90 Note 2
E 7.90 8.00 8.10 Note 2
L 0.50 0.60 0.70
L1 0.25 BASIC
b 0.17 0.22 0.27
c 0.10 – 0.21
e 0.55 BASIC
Package Drawing Contact:
packagedrawings@atmel.com
48
3597Q–DFLASH–6/11
Atmel AT45DB321D
24C3 – CBGA
TITLE DRAWING NO. REV.
Package Drawing Contact:
packagedrawings@atmel.com
24C3, 24-ball (5 x 5 Array), 1.0 mm Pitch, 6 x 8 x 1.20 mm,
Chip-scale Ball Grid Array Package (CBGA) A
24C3
9/10/04
Top View
Bottom View
Side View
A
B
C
D
E
1.00 REF
2.00 REF
E
D
A1 Ball ID
45321
E1
D1
A
A1
e
e
A1 Ball Corner
Ø
b
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
E 5.90 6.00 6.10
E1 4.0 TYP
D 7.90 8.00 8.10
D1 4.0 TYP
A – – 1.20
A1 0.25 – –
e 1.00 BSC
b 0.40 TYP
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Atmel AT45DB321D
26. Revision History
Doc. Rev. Date Comments
3597Q 06/2011 In Table 16-3,
- Increased tXFR, page to buffer transfer time and tCOMP, page to buffer compare time max
values from 200us to 300us
- Changed tCE typical time and max time are TBD, see errata
- Changed tSE typical time is 1.6s and the max time is 5s
Replace 24C1 with 24C3
Updated template
3597P 05/2010 Changed tSE (Typ) 1.6 to 0.7 and (Max) 5 to 1.3
Changed from 10,000 to 20,000 cumulative page erase/program operations and added the
please contact Atmel statement in section 11.3
3597O 10/2009 Added the 2.5V VCC option
Removed AT45DB321D-MWU-2.5 and AT45DB321D-TU-2.5 from the ordering Information table
3597N 04/2009 Updated Absolute Maximum Ratings
Added 24C1 24 Ball BGA package Option
Deleted Atmel DataFlash Card Package Option
3597M 03/2009 Changed deep power-down current values
- Increased typical value from 5µA to 15µA
- Increased maximum value from 15µA to 25µA
3597L 02/2009 Changed tDIS (Typ and Max) to 27ns and 35ns, respectively
3597K 09/2008 Corrected typographical errors in Sector Erase section.
Corrected A17+A16 from x (Don’t care) to A for opcode 7Ch in Table 15-6
Corrected PA8+PA7 from x (Don’t care) to P for opcode 7Ch in Table 15-7
3597J 04/2008 Added part number ordering code details for suffixes SL954/955
Added ordering code details
3597I 08/2007 Added additional text to “power of two” binary page size option
Changed tVSCL from 50µs to 70µs
Changed tRDPD from 30µs to 35µs
Changed tXFR and tCOMP values from 400µs to 200µs
Removed AT45DB321D-CNU from ordering information and corresponding 8CN3 package
3597H 02/2007 Added AT45DB321D-CNU to ordering information and corresponding 8CN3 package
Removed “not recommended for new designs” comment from 8MW package drawing
3597G 09/2006 Removed “not recommended for new designs” note from ordering information for 8MW package
3597F 08/2006 Added errata regarding Chip Erase
Added AT45DB321D-SU to ordering information and corresponding 8S2 package
3597E 07/2006 Corrected typographical errors
3597D 04/2006 Added 8 x 6mm MLF (VDFN) package
Changed the sector size of 0a and 0b to 8 pages and 120 pages respectively
Changed the Product Version Code to 00001
3597C 03/2006 Added preliminary
Changed the sector size from 256-Kbytes to 64-Kbytes
Added the “Legacy Commands” table
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3597Q–DFLASH–6/11
Atmel AT45DB321D
27. Errata
27.1 Chip Erase
27.1.1 Issue
In a certain percentage of units, the chip erase feature may not function correctly and may adversely affect device operation.
Therefore, it is recommended that the chip erase commands (opcodes C7H, 94H, 80H, and 9AH) not be used.
27.1.2 Workaround
Use block erase (opcode 50H) as an alternative. The block erase function is not affected by the chip erase issue.
27.1.3 Resolution
The chip erase feature may be fixed with a new revision of the device. Please contact Atmel for the estimated availability of
devices with the fix.
3597B 01/2006 Added 6 x 5mm MLF (VDFN) package
Added text, in “Programming the Configuration Register”, to indicate that power cycling is
required to switch to “power of two” page size after the opcode enable has been executed.
Corrected typographical error regarding the opcode for chip erase in “Program and Erase
Commands” table
3597A 11/2005 Initial release
Doc. Rev. Date Comments
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