AT45DB321C-CU(2006) View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
AT45DB321C-CU Datasheet PDF : 40 Pages
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14. Write Operations
The following block diagram and waveforms illustrate the various write sequences available.
FLASH MEMORY ARRAY
PAGE (528 BYTES)
BUFFER 1 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 1 (528 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 (528 BYTES)
BUFFER 2
WRITE
SI
14.1 Main Memory Page Program through Buffers
CS
SI
CMD
r, PA12-6 PA5-0, BFA9-8 BFA7-0
n
· Completes writing into selected buffer
· Starts self-timed erase/program operation
n+1
Last Byte
14.2 Buffer Write
CS
SI
CMD
X
X···X, BFA9-8 BFA7-0
n
· Completes writing into selected buffer
n+1
Last Byte
14.3 Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
Starts self-timed erase/program operation
CS
SI
CMD
r , PA12-6 PA5-0, XX
X
Each transition represents
8 bits and 8 clock cycles
n = 1st byte write
n+1 = 2nd byte write
26 AT45DB321C
3387L–DFLASH–6/06
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