參數(shù)資料
型號: S29GL064A10BAIW12
廠商: SPANSION LLC
元件分類: PROM
英文描述: 4M X 16 FLASH 3V PROM, 100 ns, PBGA64
封裝: FBGA-64
文件頁數(shù): 40/97頁
文件大?。?/td> 3490K
代理商: S29GL064A10BAIW12
January 11, 2006 S29GL-A_00_A5
S29GL-A MirrorBit Flash Family
43
Pr el im i n a r y
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 VID. During this mode, formerly protected sector
groups can be programmed or erased by selecting the sector group addresses.
Once VID is removed from the RESET# pin, all the previously protected sector
groups are protected again. Figure 1 shows the algorithm, and Figure 22, on
page 82 shows the timing diagrams, for this feature.
Notes:
1. All protected sector groups unprotected (If WP# = VIL, 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).
2. All previously protected sector groups are protected once again.
Figure 1. Temporary Sector Group Unprotect Operation
START
Perform Erase or
Program Operations
RESET# = VIH
Temporary Sector
Group Unprotect Completed
(Note 2)
RESET# = VID
(Note 1)
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