am49pdl127ah Meet Spansion Inc., am49pdl127ah Datasheet - Page 42

• Manufacturer Part Number: am49pdl127ah
• Description: Stacked Multi-chip Package Mcp Flash Memory And Psram, 128 Megabit 8m ? 16-bit Cmos 3.0 Volt-only, Simultaneous Operation Flash Memory And 16 Mbit 1m ? 16-bit Cmos Pseudo Static Ram
• Manufacturer: Meet Spansion Inc.

40
Increment PLSCNT
PLSCNT = 25?
Device Failed
No
Yes
A D V A N C E
Figure 3. SecSi Sector Protection Algorithm
Am49PDL127AH/Am49PDL129AH
write 48h to sector address
Write AAh to address 555h
Write 55h to address 2AAh
write 68h to sector address
Write AAh to address 555h
Write 55h to address 2AAh
Write 60h to address 555h
Write 88h to address 555h
No
Read from sector address
with A7–A0 = 00011010
with A7–A0 = 00011010
with A7–A0 = 00011010
Protect SecSi Sector:
Protection Completed
SecSi
Verify SecSi Sector:
Write SA0+555h/90h
SecSi Sector Exit
Protection Entry
Time out 256 µs
Write 555h/AAh
Write 2AAh/55h
Write XXXh/00h
SecSi Sector
SecSi Sector
PLSCNT = 1
Data = 01h?
TM
START
Sector Entry
I N F O R M A T I O N
Yes
SecSi Sector Entry
SecSi Sector Protection
SecSi Sector Exit
December 18, 2003