AT45DB321D ATMEL [ATMEL Corporation], AT45DB321D Datasheet - Page 27

• Manufacturer Part Number: AT45DB321D
• Description: 32-megabit 2.7-volt DataFlash
• Manufacturer: ATMEL [ATMEL Corporation]

Note:
14.2
3597J–DFLASH–4/08
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.
Operation Mode Summary
CS
SO
SI
Each transition
represents 8 bits
The commands described previously can be grouped into four different categories to better
describe which commands can be executed at what times.
Group A commands consist of:
Group B commands consist of:
Group C 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
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
1. Buffer 1 (or 2) Read
2. Buffer 1 (or 2) Write
3. Status Register Read
4. Manufacturer and Device ID Read
Opcode
9FH
Manufacturer ID
Byte 1
1FH
Device ID
Byte 2
27H
Device ID
Byte 3
00H
String Length
Information
Extended
Device
01H
if the Extended Device Information String Length
This information would only be output
value was something other than 00H.
Information
Extended
Device
Byte x
Data
Information
Byte x + 1
Extended
Device
Data
AT45DB321D
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