w27c020 Winbond Electronics Corp America, w27c020 Datasheet - Page 11

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w27c020

Manufacturer Part Number

w27c020

Description

256k X 8 Electrically Erasable Eprom

Manufacturer

Winbond Electronics Corp America

Datasheet

1.W27C020.pdf (14 pages)

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SMART ERASE ALGORITHM

Increment

Address

No

Chip Erase 100 mS Pulse

Address = First Location

A9 = 14V; A0 = V

Increment X

FFs (HEX)

All Bytes to

Compare

Vpp = 14V

Vcc = 5V

Last

Address?

Vcc = 5V

Vpp = 5V

Pass

Device

Start

X = 0

Erase

Verify

Yes

Pass

Pass

- 11 -

IL

Fail

Fail

Publication Release Date: September 1998

Preliminary W27C020

Yes

No

Fail

Device

X = 20?

Revision A1

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