at45db021d-ssh-sl955 ATMEL Corporation, at45db021d-ssh-sl955 Datasheet - Page 38

• Manufacturer Part Number: at45db021d-ssh-sl955
• Description: 2-megabit 2.7-volt Minimum Dataflash
• Manufacturer: ATMEL Corporation

21.6
Note:
21.7
21.8
38
Reset Timing
The CS signal should be in the high state before the RESET signal is deasserted.
Command Sequence for Read/Write Operations for Page Size 256 Bytes (Except Status
Register Read, Manufacturer and Device ID Read)
Command Sequence for Read/Write Operations for Page Size 264 Bytes (Except Status
Register Read, Manufacturer and Device ID Read)
SO (OUTPUT)
AT45DB021D
SI (INPUT)
RESET
SI (INPUT)
SCK
CS
MSB
SI (INPUT)
MSB
6 Don’t Care
HIGH IMPEDANCE
X X X X X X
5 Don’t Care
X X X X X
Bits
Bits
CMD
CMD
X X
8 bits
X X X X
Page Address
8 bits
(A17 - A8)
Page Address
(PA9 - PA0)
X X X X X X X X
8 bits
X X X X
8 bits
8 bits
X X X
(A7 - A0/BFA7 - BFA0)
8 bits
Byte/Buffer Address
(BA8 - BA0/BFA8 - BFA0)
X X X X X X X X
Byte/Buffer Address
X X X X X X X X
t RST
t REC
HIGH IMPEDANCE
LSB
LSB
t CSS
3638F–DFLASH–4/08