S29AL016M10BAI012 View Datasheet(PDF) - Spansion Inc.

Part Name

Description

Manufacturer

S29AL016M10BAI012

16 Megabit (2 M x 8-Bit/1 M x 16-Bit) 3.0 Volt-only Boot Sector Flash Memory featuring MirrorBit™ technology

Spansion Inc. 

Sector protection and unprotection requires VID on the RESET# pin only, and can

be implemented either in-system or via programming equipment. Figure 2 shows

the algorithms and Figure 23 shows the timing diagram. This method uses stan-

dard microprocessor bus cycle timing. For sector unprotect, all unprotected

sectors must first be protected prior to the first sector unprotect write cycle.

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 pro-

grammed or erased by selecting the sector addresses. Once VID is removed from

the RESET# pin, all the previously protected sectors are protected again. Figure

shows the algorithm, and Figure 22 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

17

S29AL016M

S29AL016M_00A4 April 21, 2004

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