W49F020-90B データシートの表示（PDF） - Winbond

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W49F020-90B

256K x 8 CMOS FLASH MEMORY

Winbond 

Preliminary W49F020

Command Codes for Byte Program

WORD SEQUENCE

ADDRESS

0 Write

5555H

1 Write

2AAAH

2 Write

5555H

3 Write

Programmed-Address

DATA

AAH

55H

A0H

Programmed-Data

Byte Program Flow Chart

Byte Program

Command Flow

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data A0

to

address 5555

Load data Din

to

programmed-

address

Pause 50 µ S

Exit

Notes for software program code:

Data Format: DQ7−DQ0 (Hex

Address Format: A14−A0 (Hex)

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