as29lv016brg-90/xt Austin Semiconductor, Inc., as29lv016brg-90/xt Datasheet - Page 12

• Manufacturer Part Number: as29lv016brg-90/xt
• Description: 16 Megabit 2m X 8-bit / 1m X 16-bit Cmos 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: Austin Semiconductor, Inc.

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 V
programmed or erased by selecting the sector addresses. Once V
protected sectors are protected again. Figure 1 shows the algorithm, and Figure 21, on page 35 shows the timing
diagrams, for this feature.
AS29LV016
Rev. 2.0 06/06
Figure 1. Temporary Sector Unprotect Operation
Austin Semiconductor, Inc.
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once
again.
Unprotect Completed
Program Operations
Temporary Sector
Perform Erase or
RESET# = V
RESET# = V
(Note 1)
(Note 2)
START
12
ID
. During this mode, formerly protected sectors can be
ID
IH
ID
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
is removed from the RESET# pin, all the previously
BOO
BOO
BOOT SECT
BOO
BOO
T SECT
T SECT
T SECT
T SECTOR FLASH
CO
CO
CO
COTS PEM
CO
OR FLASH
OR FLASH
OR FLASH
OR FLASH
AS29LV016
TS PEM
TS PEM
TS PEM
TS PEM