Write
Operations
The following block diagram and waveforms illustrate the various write sequences available.
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER TO
MAIN MEMORY
PAGE PROGRAM
BUFFER (264 BYTES)
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER
BUFFER
WRITE
I/O INTERFACE
SI
Main Memory Page Program through Buffer
· Completes writing into buffer
· Starts self-timed erase/program operation
CS
BFA7-0
r ···r , PA8-7
PA6-0, BFA8
SI
CMD
n
n+1
Last Byte
Buffer Write
· Completes writing into buffer
CS
SI
CMD
X
X···X, BFA8
BFA7-0
n
n+1
Last Byte
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
Starts self-timed erase/program operation
CS
SI
CMD
r ···r , PA8-7
PA6-0, X
X
n = 1st byte written
Each transition represents
8 bits and 8 clock cycles
n+1 = 2nd byte written
16
AT45DB011B
1984H–DFLSH–10/04
ATMEL [ ATMEL ]
