W27E257 Просмотр технического описания (PDF) - Winbond

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W27E257

32K x 8 ELECTRICALLY ERASABLE EPROM

Winbond 

SMART ERASE ALGORITHM

Start

X=0

Vcc = 5V

Vpp = 14V

A9 = 14V; A0 = VIL

Chip Erase 100 mS Pulse

Address = First Location

Increment X

Fail

Erase

Verify

Pass

Increment

No

Last

Address

Address?

Yes

Vcc = 5V

Vpp = 5V

Compare

Fail

All Bytes to

FFs (HEX)

Pass

Pass

Device

W27E257

No

X = 20?

Yes

Fail

Device

- 11 -

Publication Release Date: January 1997

Revision A3

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