AT45DB081D
22. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
FLASH MEMORY ARRAY
PAGE (256/264 BYTES)
BUFFER 1 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 1 (256/264 BYTES)
BUFFER 2 (256/264 BYTES)
BUFFER 1
WRITE
BUFFER 2
WRITE
I/O INTERFACE
SI
22.1 Buffer Write
Completes writing into selected buffer
CS
BINARY PAGE SIZE
16 DON'T CARE + BFA7-BFA0
SI (INPUT)
n
n+1
CMD
X
BFA7-0
X···X, BFA8
Last Byte
22.2 Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
Starts self-timed erase/program operation
CS
BINARY PAGE SIZE
A19-A8 + 8 DON'T CARE BITS
SI (INPUT)
XXXX XX
CMD
PA10-7
PA6, X
Each transition
represents 8 bits
n = 1st byte read
n+1 = 2nd byte read
39
3596E–DFLASH–02/07
ATMEL [ ATMEL ]
