AT45D011-XI(1998) Ver la hoja de datos (PDF) - Atmel Corporation

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AT45D011-XI
(Rev.:1998)

1-Megabit 5.0-volt Only Serial DataFlash®

Atmel Corporation 

AT45DB011

Write Operations

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

FLASH MEMORY ARRAY

PAGE (264 BYTES)

BUFFER TO

MAIN MEMORY

PAGE PROGRAM

BUFFER (264 BYTES)

BUFFER

WRITE

I/O INTERFACE

MAIN MEMORY PAGE

PROGRAM THROUGH

BUFFER

SI

Main Memory Page Program through Buffer

CS

SI

CMD

r ···r , PA8-7 PA6-0, BFA8

BFA7-0

n

· Completes writing into buffer

· Starts self-timed erase/program operation

n+1

Last Byte

Buffer Write

CS

SI

CMD

X

X···X, BFA8

BFA7-0

n

· Completes writing into 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

CMD

r ···r , PA8-7

PA6-0, X

X

Each transition represents

8 bits and 8 clock cycles

n = 1st byte written

n+1 = 2nd byte written

11

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