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AM29PDL129H データシート(PDF) 24 Page - SPANSION

部品番号 AM29PDL129H
部品情報  128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Page Mode Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control and Dual chip Enable
PDF  49 Pages
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メーカー  SPANSION [SPANSION]
ホームページ  http://www.spansion.com
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AM29PDL129H データシート(HTML) 24 Page - SPANSION

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Am29PDL129H
November 2, 2005
Figure 3.
SecSi Sector Protection Algorithm
■ To verify the protect/unprotect status of the SecSi
Sector, follow the algorithm shown in Figure 4.
START
SecSiTM Sector Entry
Write AAh to address 555h
Write 55h to address 2AAh
Write 88h to address 555h
SecSi Sector
Protection Entry
Write AAh to address 555h
Write 55h to address 2AAh
Write 60h to address 555h
PLSCNT = 1
Protect SecSi Sector:
write 68h to sector address
with A7–A0 = 00011010
Time out 256
μs
Read from sector address
with A7–A0 = 00011010
Data = 01h?
Yes
SecSi Sector
Protection Completed
SecSi Sector Exit
Write 555h/AAh
Write 2AAh/55h
Write SA0+555h/90h
Write XXXh/00h
Verify SecSi Sector:
write 48h to sector address
with A7–A0 = 00011010
No



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