W27C020M-90 查看數據表（PDF） - Winbond

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W27C020M-90

256K x 8 ELECTRICALLY ERASABLE EPROM

Winbond 

Preliminary W27C020M

SMART ERASE ALGORITHM

Start

X=0

Vcc = 5V

Vpp = 14V

A9 = 14V; A0 = VIL

Chip Erase 100 mS Pulse

Address = First Location

Increment X

Increment

No

Address

Fail

Erase

Verify

Pass

Last

Address?

Yes

Vcc = 5V

Vpp = 5V

Compare

Fail

All Bytes to

FFs (HEX)

Pass

Pass

Device

No

X = 20?

Yes

Fail

Device

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Publication Release Date: March 1999

Revision A1

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