AT45DB081D-MU(2007) 查看數據表（PDF） - Atmel Corporation

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AT45DB081D-MU
(Rev.:2007)

8-megabit 2.5V or 2.7V Atmel DataFlash

Atmel Corporation 

23. Read Operations

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

FLASH MEMORY ARRAY

PAGE (256/264 BYTES)

MAIN MEMORY

PAGE TO

BUFFER 1

BUFFER 1 (256/264 BYTES)

BUFFER 1

READ

MAIN MEMORY

PAGE TO

BUFFER 2

BUFFER 2 (256/264 BYTES)

MAIN MEMORY

PAGE READ

BUFFER 2

READ

I/O INTERFACE

SO

23.1 Main Memory Page Read

CS

ADDRESS FOR BINARY PAGE SIZE

A19-A16

A15-A8

A7-A0

SI (INPUT)

CMD

PA11-7

PA6-0, BA8

BA7-0

X

X

SO (OUTPUT)

4 Dummy Bytes for Serial

n

n+1

23.2 Main Memory Page to Buffer Transfer (Data from Flash Page Read into Buffer)

Starts reading page data into buffer

CS

SI (INPUT)

BINARY PAGE SIZE

A19-A8 + 8 DON'T CARE BITS

CMD

PA11-7

PA6-0, X

XXXX XXXX

SO (OUTPUT)

40 AT45DB081D

3596E–DFLASH–02/07

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