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M750000007 数据表(PDF) 47 Page - SPANSION

部件名 M750000007
功能描述  128 Megabit (8 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory
PDF  129 Pages
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制造商  SPANSION [SPANSION]
网页  http://www.spansion.com
标志 SPANSION - SPANSION

M750000007 数据表(HTML) 47 Page - SPANSION

Back Button M750000007 Datasheet HTML 43Page - SPANSION M750000007 Datasheet HTML 44Page - SPANSION M750000007 Datasheet HTML 45Page - SPANSION M750000007 Datasheet HTML 46Page - SPANSION M750000007 Datasheet HTML 47Page - SPANSION M750000007 Datasheet HTML 48Page - SPANSION M750000007 Datasheet HTML 49Page - SPANSION M750000007 Datasheet HTML 50Page - SPANSION M750000007 Datasheet HTML 51Page - SPANSION Next Button
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February 6, 2004
Am75PDL191BHHa/Am75PDL193BHHa
45
ADV ANCE
I N FO RMAT I O N
Figure 3.
PDL127/9H SecSi Sector Protection Algorithm
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.
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.
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
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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