參數(shù)資料
型號: W29GL128CL1B
廠商: WINBOND ELECTRONICS CORP
元件分類: PROM
英文描述: 128M X 1 FLASH 3V PROM, 100 ns, PBGA64
封裝: 11 X 13 MM, GREEN, BGA-64
文件頁數(shù): 13/63頁
文件大?。?/td> 552K
代理商: W29GL128CL1B
W29GL128C
14
7.3
Enhanced Sector Protect/Un-protect
This device is set from the factory in the Individual Protection mode of the Enhanced Sector Protect
scheme. The user can disable or enable the programming or erasing operation to any individual sector
or whole chip. The figure below helps describe an overview of these methods.
The device defaults to the Individual mode and all sectors are unprotected when shipped from the
factory.
The following flow chart shows the detailed algorithm of Enhanced Sector Protect:
Start
Individual Protection
Mode
(Default)
Figure 7-1
Enhanced Sector Protect/Un-protect IPB Program Algorithm
Set IPB
Lock Bit
IPB lock Bit locked
All IPB not changeable
Dynamic Write Protect bit
(DPB)
Sector Array
Individual Protect bit
(IPB)
DPB=0 Sector Protect
DPB=1 Sector Unprotect
IPB Lock bit Unlocked
IPB is Changeable
DPB 0
DPB 1
DPB 2
DPB + n
.
SA 0
SA 1
SA 2
SA + n
.
IPB 0
IPB 1
IPB 2
IPB + n
.
IPB=0 Sector Protect
IPB=1 Sector Unprotect
IPB=0
IPB=1
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