AT5FC004-20 データシートの表示（PDF） - Atmel Corporation

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AT5FC004-20

4-Megabyte Flash Memory PCMCIA Card

Atmel Corporation 

A.C. Write Waveforms (Word Mode)

OE

CE1,2

WE

tAS

A1-A8

A9-A19

DATA

tWP

tAH

tDH

BYTE

ADDRESS

SECTOR

ADDRESS

tDS

WORD 0

WORD 1

tWPH

tBLC

WORD 2

tWC

WORD 254 WORD 255

1. A20 and A21 specify the pair of AT29C040A devices to be writ-

ten; they must be valid throughout the entire WE low pulse. A0 is

don’t care.

2. A9 through A19 must specify the sector address during each high

to low transition of WE (or CE).

3. OE must be high when WE and CE are both low.

4. All bytes that are not loaded within the sector being pro-

grammed will be indeterminate.

12

AT5FC004

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