AT45DB041B-RU datasheet(17/35 Pages) ATMEL

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3443C–DFLSH–5/05

AT45DB041B

12. Write Operations

The following block diagram and waveforms illustrate the various write sequences available.

12.1

Main Memory Page Program through Buffers

12.2

Buffer Write

12.3

Buffer to Main Memory Page Program (Data from Buffer Programmed into Flash Page)

FLASH MEMORY ARRAY

PAGE (256 BYTES)

BUFFER 2 (256 BYTES)

BUFFER 1 (256 BYTES)

I/O INTERFACE

BUFFER 1 TO

PAGE PROGRAM

THROUGH BUFFER 2

BUFFER 2 TO

PAGE PROGRAM

THROUGH BUFFER 1

BUFFER 1

WRITE

BUFFER 2

WRITE

CMD

n+1

Last Byte

· Completes writing into selected buffer

· Starts self-timed erase/program operation

r r r r, PA10-7

PA6-0, BFA8

BFA7-0

CMD

X···X, BFA8

BFA7-0

n+1

Last Byte

· Completes writing into selected buffer

CMD

r r r r, PA10-7

PA6-0, X

Starts self-timed erase/program operation

Each transition represents

8 bits and 8 clock cycles

n = 1st byte read

n+1 = 2nd byte read

AT45DB041B-RU Datasheet(PDF) 17 Page - ATMEL Corporation

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