ACT-F128K32 데이터 시트보기 (PDF) - Aeroflex Corporation

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ACT-F128K32

High Speed 4 Megabit FLASH Multichip Module

Aeroflex Corporation 

Figure 11

Sector Protection Algorithm

Start

Set Up Sector Address

(A16, A15, A14)

PLSCNT = 1

OE = VID

A9 = VID, CE = VIL

Activate WE Pulse

Increment

PLSCNT

Time Out 100µs

Power Down OE

WE = VIH

CE = OE = VIH

A9 Should Remain VID

No

PLSCNT = 25

?

Yes

Device Failure

Read From Sector

Address = SA, A0 = 0, A1 = 1, A6 = 0

No

Data = 01H

?

Yes

Protect

Another

Yes

Sector?

No

Remove VID from A9

Write Reset Command

Sector Protection

Complete

Aeroflex Circuit Technology

15

SCD1667 REV A 4/28/97 Plainview NY (516) 694-6700

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