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AM29LV065DU101REF датащи(PDF) 19 Page - Advanced Micro Devices

номер детали AM29LV065DU101REF
подробное описание детали  64 Megabit (8 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIOTM Control
PDF  54 Pages
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производитель  AMD [Advanced Micro Devices]
домашняя страница  http://www.amd.com
Logo AMD - Advanced Micro Devices

AM29LV065DU101REF датащи(HTML) 19 Page - Advanced Micro Devices

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February 16, 2006
Am29LV065D
19
Temporary Sector Group Unprotect
(Note: In this device, a sector group consists of four adjacent
sectors that are protected or unprotected at the same time
(see Table 4)).
This feature allows temporary unprotection of previ-
ously protected sector groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated by
setting the RESET# pin to V
ID (8.5 V – 12.5 V). During
this mode, formerly protected sector groups can be
programmed or erased by selecting the sector group
addresses. Once V
ID is removed from the RESET#
pin, all the previously protected sector groups are
protected again. Figure 1 shows the algorithm, and
Figure 22 shows the timing diagrams, for this feature.
Figure 1.
Temporary Sector Group
Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Group Unprotect
Completed (Note 2)
RESET# = V
ID
(Note 1)
Notes:
1. All protected sector groups unprotected.
2. All previously protected sector groups are protected
once again.



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