MX29LA129M H/L
Figure 19. CHIP UNPROTECT FLOWCHART (A10, OE# Control)
START
Protect All Sectors
PLSCNT=1
Set OE#=A10=VID
CEx=VIL, A7=1
Activate WE# Pulse
Time Out 15ms
Increment
PLSCNT
Set OE#=CEx=VIL
A10=VID, A2=1
Set Up First Sector Addr
Read Data from Device
No
No
Data=00H?
Yes
PLSCNT=1000?
Increment
Sector Addr
Yes
Device Failed
No
All sectors have
been verified?
Yes
Remove VID from A10
Write Reset Command
Chip Unprotect
Complete
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
P/N:PM1171
REV. 1.0, FEB. 27, 2006
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