參數資料
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: 14/63頁
文件大?。?/td> 552K
代理商: W29GL128CL1B
W29GL128C
Publication Release Date: July 28, 2010
15
Preliminary - Revision A
7.3.1
Lock Register
User can choose Secured Silicon Sector Protection Bit for security sector protection method via setting
the Lock Register bit, DQ0. Lock Register is a 16-bit one time programmable register. Once
programmed DQ0, will be locked in that mode permanently.
Once the Instruction Set Entry instruction sequence for the Lock Register Bits is issued, all sectors
read and write functions are disabled until Lock Register Exit sequence has been executed.
The memory sectors and extended memory sector protection is configured using the Lock Register.
DQ[15:1]
DQ0
Don’t Care
Secured Silicon Sector Protection Bit
Table 7-10
Lock Register Bits
Start
Figure 7-2
Lock Register Program Algorithm
Write Data AAh, Address 555h
Write Data 55h, Address2AAh
Write Data 40h, Address 555h
Write Data A0h, Address don’t care
Write Program Data, Address don’t care
Data # Polling Algorithm
Fail
Reset instruction
Done
DQ5=1
Lock Register instruction set entry
Lock Register data program
YES
NO
YES
Pass
Exit lock Register instruction
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