Rainbow Electronics AT45DB011B - Manual (Page 16)

16
AT45DB011B
1984E–DFLSH–10/02
Write
Operations
The following block diagram and waveforms illustrate the various write sequences available.
Main Memory Page Program through Buffer
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER (264 BYTES)
I/O INTERFACE
SI
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER
BUFFER
WRITE
SI CMD n n+1 Last Byte
· Completes writing into buffer
· Starts self-timed erase/program operation
CS
r ···r , PA8-7 PA6-0, BFA8 BFA7-0
SI CMD X X···X, BFA8 BFA7-0 n n+1 Last Byte
· Completes writing into buffer
CS
SI CMD PA6-0, X X
CS
Starts self-timed erase/program operation
r ···r , PA8-7
Each transition represents
8 bits and 8 clock cycles
n = 1st byte written
n+1 = 2nd byte written