R
MX29LV160BT/BB
Figure 14. IN-SYSTEM SECTOR PROTECTION ALGORITHM WITH RESET=VID
START
PLSCNT=1
RESET=VID
Wait 1us
No
Temporary Sector
Unprotect Mode
First Write
Cycle=60H
Yes
Set up sector address
Write 60H to sector address
with A6=0, A1=1, A0=0
Wait 150us
Verify sector protect :
write 40H with A6=0,
A1=1, A0=0
Increment PLSCNT
Reset PLSCNT=1
Read from sector address
No
No
PLSCNT=25?
Data=01H ?
Yes
Yes
Device failed
Yes
Protect another
sector?
No
Remove VID from RESET
Write reset command
Sector protect complete
P/N:PM1041
REV. 1.2, JUL. 01, 2004
40