AT45DB321D-SU-SL954 ATMEL [ATMEL Corporation], AT45DB321D-SU-SL954 Datasheet - Page 40

• Manufacturer Part Number: AT45DB321D-SU-SL954
• Description: 32-megabit 2.7-volt DataFlash
• Manufacturer: ATMEL [ATMEL Corporation]

22. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
22.1
22.2
40
SI (INPUT)
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
CS
AT45DB321D
SI (INPUT)
CS
represents 8 bits
Each transition
PAGE PROGRAM
BUFFER 1 (512/528 BYTES)
MAIN MEMORY
PAGE (512/528 BYTES)
BUFFER 1 TO
CMD
BUFFER 1
WRITE
X
15 DON'T CARE + BFA8-BFA0
CMD
BINARY PAGE SIZE
X···X, BFA9-8
FLASH MEMORY ARRAY
I/O INTERFACE
PA12-6
Starts self-timed erase/program operation
BFA7-0
SI
A21-A9 + 9 DON'T CARE BITS
BINARY PAGE SIZE
BUFFER 2 (512/528 BYTES)
n
PA5-0, XX
Completes writing into selected buffer
n+1
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2
WRITE
XXXX XX
n = 1st byte read
n+1 = 2nd byte read
Last Byte
3597N–DFLASH–04/09