參數資料
型號： W78M64VP120SBI
廠商： WHITE ELECTRONIC DESIGNS CORP
元件分類： 存儲器
英文描述： SPECIALTY MEMORY CIRCUIT, PBGA156
封裝： 13 X 22 MM, PLASTIC, BGA-156
文件頁數： 31/48頁
文件大?。?/td> 1548K
代理商： W78M64VP120SBI
37
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
W78M64VP-XSBX
October 2008
Rev. 2
ADVANCED
White Electronic Designs Corp. reserves the right to change products or specications without notice.
FIG: 10 LOCK REGISTER PROGRAM ALGORITHM
Write Unlock Cycles:
Address 555h, Data AAh
Address 2AAh, Data 55h
Write
Enter Lock Register Command:
Address 555h, Data 40h
Program Lock Register Data
Address XXXh, Data A0h
Address XXXh*, Data PD
Unlock Cycle 1
Unlock Cycle 2
XXXh = Address don’t care
Program Data (PD): See text for Lock Register definitions
Caution: Lock register can only be progammed once.
PASS. Write Lock Register
Exit Command:
Address XXXh, Data 90h
Address XXXh, Data 00h
Device returns to reading array.
Perform Polling Algorithm
(see Write Operation Status
flowchart)
Yes
No
Done?
DQ5 = 1?
Error condition (Exceeded Timing Limits)
FAIL. Write rest command
to return to reading array.
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