AT45DB321C-RI ATMEL [ATMEL Corporation], AT45DB321C-RI Datasheet - Page 11

• Manufacturer Part Number: AT45DB321C-RI
• Description: 32 MEGABIT 2.7 VOLT DATAFLASH
• Manufacturer: ATMEL [ATMEL Corporation]

Manufacturer and Device ID Read
This instruction conforms to the JEDEC standard and allows the user to read the Manufacturer ID, Device ID, and Extended
Device Information. A 1-byte opcode, 9FH, must be clocked into the device while the CS pin is low. After the opcode is
clocked in, the Manufacturer ID, 2 bytes of Device ID and Extended Device Information will be clocked out on the SO pin.
The fourth byte of the sequence output is the Extended Device Information String Length byte. This byte is used to signify
how many bytes of Extended Device Information will be output.
Manufacturer and Device ID Information
Byte 1 – Manufacturer ID
Byte 2 – Device ID (Part 1)
Byte 3 – Device ID (Part 2)
Byte 4 – Extended Device Information String Length
Note:
3387B–DFLSH–9/04
Value
Value
Value
Value
Hex
Hex
Hex
Hex
1FH
27H
00H
00H
CS
SO
Each transition represents
SI
8 bits and 8 clock cycles
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.
Bit 7
Bit 7
Bit 7
Bit 7
0
0
0
0
Family Code
MLC Code
Bit 6
Bit 6
Bit 6
Bit 6
0
0
0
0
Opcode
Bit 5
Bit 5
Bit 5
Bit 5
9FH
0
1
0
0
JEDEC Assigned Code
Bit 4
Bit 4
Bit 4
Bit 4
Manufacturer ID
Byte Count
1
0
0
0
Byte n
1FH
Bit 3
Bit 3
Bit 3
Bit 3
Product Version Code
1
0
0
0
Density Code
Bit 2
Bit 2
Bit 2
Bit 2
Device ID
1
1
0
0
Byte 1
27H
Bit 1
Bit 1
Bit 1
Bit 1
1
1
0
0
Bit 0
Bit 0
Bit 0
Bit 0
Device ID
1
1
0
0
Byte 2
00H
String Length
AT45DB321C [Preliminary]
Information
Extended
Device
Manufacturer ID
Family Code
Density Code
MLC Code
Product Version
Byte Count
00H
Information
Information String Length
Extended
Device
if the Extended Device
Byte x
would only be output
value was something
Data
This information
other than 00H.
1FH = Atmel
00111 = 32-Mbit
00000 = Initial Version
00H = 0 Bytes of Information
001 = DataFlash
000 = 1-bit/Cell Technology
Information
Byte x + 1
Extended
Device
Data
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