AT45DB642_14 Datasheet, PDF (19/37 Pages) ATMEL Corporation – AT45DB642_14

AT45DB642
Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
FLASH MEMORY ARRAY
PAGE (1056 BYTES)
BUFFER 1 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 1 (1056 BYTES)
BUFFER 1
WRITE
MAIN MEMORY
PAGE PROGRAM
THROUGH BUFFER 2
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER 1
I/O INTERFACE
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2 (1056 BYTES)
BUFFER 2
WRITE
SI
I/O7 - I/O0
Main Memory Page Program through Buffers
CS
SI or I/O7 - I/O0
(INPUT)
CMD
PA12-5
PA4-0, BFA10-8
BFA7-0
n
· Completes writing into selected buffer
· Starts self-timed erase/program operation
n+1
Last Byte
Buffer Write
CS
SI or I/O7 - I/O0
(INPUT)
CMD
X
X···X, BFA10-8 BFA7-0
n
· Completes writing into selected buffer
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 or I/O7 - I/O0
(INPUT)
CMD
PA12-5
PA4-0, XXX
X···X
Each transition
represents 8 bits
n = 1st byte read
n+1 = 2nd byte read
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1638F–DFLSH–09/02