參數(shù)資料
型號: S29GL064M90TAIR73
廠商: SPANSION LLC
元件分類: DRAM
英文描述: 256,128,64,32,Megabit 3.0 Volt-only Page Mode Flash Memory featuring 0.23 レm MirrorBit Process Technology
中文描述: 4M X 16 FLASH 3V PROM, 90 ns, PDSO48
封裝: MO-142EC, TSOP-48
文件頁數(shù): 55/116頁
文件大?。?/td> 1656K
代理商: S29GL064M90TAIR73
October 10, 2006 S29GL-M_00_B6
S29GL-M MirrorBit
TM
Flash Family
53
D a t a S h e e t
Temporary Sector Group Unprotect
This feature allows temporary unprotection of previously protected sector groups to change data
in-system. The Sector Group Unprotect mode is activated by setting the RESET# pin to
V
ID
. Dur-
ing 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. For this feature,
Figure 1
shows the algorithm, and
Figure 23
shows the timing diagrams.
Notes:
1.
All protected sector groups unprotected (If WP# = V
, the highest or lowest address sector
remains protected for uniform sector devices, the top or bottom two address sectors remains
protected for boot sector devices).
All previously protected sector groups are protected once again.
Figure 1. Temporary Sector Group Unprotect Operation
2.
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Group Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
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