W29C020S-70B datasheet(6/21 Pages) WINBOND

No de pièce	W29C020S-70B

Description	256K X 8 CMOS FLASH MEMORY

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Fabricant	WINBOND [Winbond]

Site Internet	http://www.winbond.com

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W29C020

- 6 -

Command Codes for Software Data Protection

BYTE SEQUENCE

TO ENABLE PROTECTION

TO DISABLE PROTECTION

ADDRESS

DATA

ADDRESS

DATA

0 Write

5555H

AAH

5555H

AAH

1 Write

2AAAH

55H

2AAAH

55H

2 Write

5555H

A0H

5555H

80H

3 Write

-

5555H

AAH

4 Write

-

2AAAH

55H

5 Write

-

5555H

20H

Software Data Protection Acquisition Flow

Software Data Protection

Enable Flow

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data A0

to

address 5555

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data 80

to

address 5555

Load data AA

to

address 5555

Load data 55

to

address 2AAA

Load data 20

to

address 5555

Software Data Protection

Disable Flow

Sequentially load

up to 128 bytes

of page data

Pause 10 mS

Exit

Pause 10 mS

Exit

(Optional page-load

operation)

Notes for software program code:

Data Format: DQ7

−DQ0 (Hex)

Address Format: A14

−A0 (Hex)

Numéro de pièce similaire - W29C020S-70B

Fabricant	No de pièce	Fiches technique	Description
Winbond	W29C020C	194Kb / 21P	256K X 8 CMOS FLASH MEMORY
	W29C020C-12	194Kb / 21P	256K X 8 CMOS FLASH MEMORY
	W29C020C-12B	194Kb / 21P	256K X 8 CMOS FLASH MEMORY
	W29C020C-70	194Kb / 21P	256K X 8 CMOS FLASH MEMORY
	W29C020C-70B	194Kb / 21P	256K X 8 CMOS FLASH MEMORY

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Winbond	W29C020C	194Kb / 21P	256K X 8 CMOS FLASH MEMORY
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Intel Corporation	28F020	878Kb / 38P	28F020 2048K (256K X 8) CMOS FLASH MEMORY
Macronix International	MX28F2000P	191Kb / 33P	2M-BIT [256K x 8] CMOS FLASH MEMORY
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	MX29F002	608Kb / 51P	2M-BIT [256K x 8] CMOS FLASH MEMORY
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Winbond	W29C022	166Kb / 20P	256K x 8 CMOS FLASH MEMORY

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