Rainbow Electronics AT45DB081D - Manual (Page 39)

39
3596N–DFLASH–11/2012
AT45DB081D
22. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
22.1 Buffer Write
22.2 Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
FLASH MEMORY ARRAY
PAGE (256-/264-BYTES)
BUFFER (256-/264-BYTES)
I/O INTERFACE
SI
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
BUFFER
WRITE
SI (INPUT)
CMD
Completes writing into selected buffer
CS
X X···X, BFA8 BFA7-0 n n+1 Last Byte
BINARY PAGE SIZE
16 DON'T CARE + BFA7-BFA0
SI (INPUT) CMD PA10-7 PA6, X
CS
Starts self-timed erase/program operation
XXXX XX
Each transition
represents 8 bits
n = 1st byte read
n+1 = 2nd byte read
BINARY PAGE SIZE
A19-A8 + 8 DON'T CARE BITS