參數(shù)資料
型號: AM75PDL193BHHA70I
廠商: SPANSION LLC
元件分類: 存儲器
英文描述: 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory
中文描述: SPECIALTY MEMORY CIRCUIT, PBGA73
封裝: 9 X 13 MM, FBGA-73
文件頁數(shù): 47/129頁
文件大小: 980K
代理商: AM75PDL193BHHA70I
February 6, 2004
Am75PDL191BHHa/Am75PDL193BHHa
45
A D V A N C E I N F O R M A T I O N
Figure 3.
PDL127/9H SecSi Sector Protection Algorithm
SecSi Sector Protection Bits
The SecSi Sector Protection Bits prevent program-
ming of the SecSi Sector memory area. Once set, the
SecSi Sector memory area contents are non-modifi-
able.
The SecSi Sector lock must be used with caution
since, once locked, there is no procedure available for
unlocking the SecSi Sector area and none of the bits
in the SecSi Sector memory space can be modified in
any way.
START
SecSi
TM
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
μ
s
Read from sector address
with A7–A0 = 00011010
Data = 01h
Yes
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
Increment PLSCNT
PLSCNT = 25
Device Failed
SecSi Sector Entry
SecSi Sector Protection
SecSi Sector Exit
No
No
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AM75PDL191CHHA 128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory
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