AS29LV016 Просмотр технического описания (PDF) - Austin Semiconductor

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AS29LV016

16 Megabit (2M x 8-Bit / 1M x 16-Bit) CMOS 3.0 Volt-Only Boot Sector Flash Memory

Austin Semiconductor 

COTS PEM

BOOT SECTOR FLASH

Austin Semiconductor, Inc.

AS29LV016

TEMPORARY SECTOR UNPROTECT

This feature allows temporary unprotection of previously protected sectors to change data in-system. The Sector

Unprotect mode is activated by setting the RESET# pin to VID. During this mode, formerly protected sectors can be

programmed or erased by selecting the sector addresses. Once VID is removed from the RESET# pin, all the previously

protected sectors are protected again. Figure 1 shows the algorithm, and Figure 21, on page 35 shows the timing

diagrams, for this feature.

START

RESET# = VID

(Note 1)

Perform Erase or

Program Operations

RESET# = VIH

Temporary Sector

Unprotect Completed

(Note 2)

Notes:

1. All protected sectors unprotected.

2. All previously protected sectors are protected once

again.

Figure 1. Temporary Sector Unprotect Operation

AS29LV016

Rev. 2.1 10/08

12

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

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