AT45DB080-TC View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT45DB080-TC

8-Megabit 2.7-volt Only Sequential Access Parallel I/O DataFlash®

Atmel Corporation 

Read Operations

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

FLASH MEMORY ARRAY

PAGE (264 BYTES)

MAIN MEMORY

PAGE TO

BUFFER 1

BUFFER 1 (264 BYTES)

BUFFER 1

READ

MAIN MEMORY

PAGE TO

BUFFER 2

BUFFER 2 (264 BYTES)

MAIN MEMORY

PAGE READ

BUFFER 2

READ

I/O INTERFACE

I/O7-I/O0 (OUTPUT)

Main Memory Page Read

CS

I/O7-I/O0

(INPUT)

I/O7-I/O0

(OUTPUT)

CMD

r r r, PA11-7 PA6-0, BA8

BA7-0

X

X

X

X

ADDR

ADDR

ADDR

n

n+1

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

CS

I/O7-I/O0

(INPUT)

I/O7-I/O0

(OUTPUT)

Starts reading page data into buffer

CMD

r r r, PA11-7 PA6-0, X

X

ADDR

ADDR

ADDR

Buffer Read

CS

I/O7-I/O0

(INPUT)

I/O7-I/O0

(OUTPUT)

CMD

X

X···X, BFA8 BFA7-0

X

ADDR ADDR

ADDR

n

n+1

Each transition represents

8 bits and 1 clock cycle

n = 1st byte written

n+1 = 2nd byte written

10

AT45DB080

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