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參數(shù)資料
| 型號(hào)： | AM29LV652DU12RMAK |
| 廠商： | SPANSION LLC |
| 元件分類： | DRAM |
| 英文描述： | 128 Megabit (16 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory with VersatileIO Control |
| 中文描述： | 16M X 8 FLASH 3V PROM, 120 ns, PBGA63 |
| 封裝： | 11 X 12 MM, 0.80 MM PITCH, LEAD FREE, FBGA-63 |
| 文件頁數(shù)： | 23/55頁 |
| 文件大?。?/td> | 1181K |
| 代理商： | AM29LV652DU12RMAK |
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October 29, 2004
Am29LV652D
21
P R E L I M I N A R Y
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
previously protected sector groups are
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# = 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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