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L652DU12RI bảng dữ liệu(PDF) 23 Page - Advanced Micro Devices

tên linh kiện L652DU12RI
Giải thích chi tiết về linh kiện  128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO??Control
PDF  54 Pages
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nhà sản xuất  AMD [Advanced Micro Devices]
Trang chủ  http://www.amd.com
Logo AMD - Advanced Micro Devices

L652DU12RI bảng dữ liệu(HTML) 23 Page - Advanced Micro Devices

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May 5, 2006 24961A5
Am29LV652D
21
D A TA
SH EE T
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 5, on page 20)).
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 RESET# to V
ID (8.5 V – 12.5 V). During this
mode, formerly protected sector groups can be pro-
grammed or erased by selecting the sector group ad-
dresses. Once V
ID is removed from RESET#, all the
p r e v io usly
p r o t ect e d
se ct or
g r ou ps
a r e
protected again. Figure 1, on page 21 shows the algo-
rithm, and Figure 21, on page 46 shows the timing dia-
grams, for this feature.
Figure 1.
Temporary Sector Group
Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = VIH
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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