AT45DB321C-RI ATMEL [ATMEL Corporation], AT45DB321C-RI Datasheet - Page 23

• Manufacturer Part Number: AT45DB321C-RI
• Description: 32 MEGABIT 2.7 VOLT DATAFLASH
• Manufacturer: ATMEL [ATMEL Corporation]

Write Operations
Main Memory Page Program through Buffers
Buffer Write
Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)
3387B–DFLSH–9/04
Each transition represents
8 bits and 8 clock cycles
CS
CS
SI
SI
PAGE PROGRAM
MAIN MEMORY
PAGE (528 BYTES)
BUFFER 1 (528 BYTES)
BUFFER 1 TO
CS
SI
BUFFER 1
CMD
CMD
WRITE
r, PA12-6
The following block diagram and waveforms illustrate the various write sequences
available.
X
CMD
PA5-0, BFA9-8
X···X, BFA9-8
FLASH MEMORY ARRAY
MAIN MEMORY PAGE
PROGRAM THROUGH
BUFFER 1
r , PA12-6
I/O INTERFACE
THROUGH BUFFER 2
BFA7-0
BFA7-0
PAGE PROGRAM
MAIN MEMORY
SI
Starts self-timed erase/program operation
PA5-0, XX
n
n
AT45DB321C [Preliminary]
BUFFER 2 (528 BYTES)
n+1
n+1
· Completes writing into selected buffer
· Completes writing into selected buffer
· Starts self-timed erase/program operation
X
BUFFER 2 TO
MAIN MEMORY
PAGE PROGRAM
BUFFER 2
WRITE
n = 1st byte write
n+1 = 2nd byte write
Last Byte
Last Byte
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