AM29F400AT datasheet(31/35 Pages) AMD

Part #	AM29F400AT

Description	4 Megabit (524,288 x 8-Bit/262,144 x 16-Bit) CMOS 5.0 Volt-only, Sector Erase Flash Memory

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Manufacturer	AMD [Advanced Micro Devices]

Direct Link	http://www.amd.com

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31 / 35 page

Am29F400AT/Am29F400AB

31

PRELIMINARY

Notes:

1. All protected sectors unprotected.

2. All previously protected sectors are protected once again.

Figure 17.

Temporary Sector Unprotect Algorithm

Figure 18.

Temporary Sector Unprotect Timing Diagram

Start

Perform Erase or

Program Operations

RESET = VIH

Temporary Sector Group

Unprotect Completed

(Note 2)

RESET = VID

(Note 1)

20380B-24

RY/BY

Program or Erase Command Sequence

20380B-25

RESET

CE

WE

5 V

12 V

tVIDR

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