AM29F004BT-90 データシートの表示（PDF） - Spansion Inc.

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AM29F004BT-90

4 Megabit (512 K x 8-Bit) CMOS 5.0 Volt-only Boot Sector Flash Memory

Spansion Inc. 

AC CHARACTERISTICS

VID

VIH

OE# VSS

DATA SHEET

A18 – A0

XXXh

Valid (Note 2)

D7 – D0

60h

60h

Valid (Note 2)

40h

Array Data

CE#

WE#

Sector Unlock sequence (three cycles)

Notes:

1. To enable the command mode sector protection/unprotection

algorithm, the system must issue the command 24h in the sector

unlock sequence.

2. For sector protection, a valid address consists of the sector

address with A6 = 0, A5 = 1, A1 = 1, A0 = 0. For sector

Sector Relock sequence (two cycles)

unprotection, a valid address consists of the sector address with

A6 = 1, A5 = 1, A1 = 1, A0 = 0.

Figure 18. Sector Protect/Unprotect Timing Diagram

May 9, 2006 Am29F004B_00_E4

Am29F004B

29

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