AT45DB321C-CU(2006) 查看數據表（PDF） - Atmel Corporation

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AT45DB321C-CU
(Rev.:2006)

32-megabit 2.7 volt DataFlash®

Atmel Corporation 

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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