MX29LV033M Datasheet, PDF (50/65 Pages) Integrated Circuit Systems – 32M-BIT SINGLE VOLTAGE 3V ONLY UNIFORM SECTOR FLASH MEMORY

MX29LV033M
Figure 19. CHIP UNPROTECT FLOWCHART (A9, OE# Control)
Increment
Sector Addr
START
Protect All Sectors
PLSCNT=1
Set OE#=A9=VID
CE#=VIL, A6=1
Activate WE# Pulse
Time Out 15ms
Set OE#=CE#=VIL
A9=VID, A1=1
Set Up First Sector Addr
Read Data from Device
No
Data=00H?
Yes
No
All sectors have
been verified?
Yes
Remove VID from A9
Write Reset Command
Chip Unprotect
Complete
Increment
PLSCNT
No
PLSCNT=1000?
Yes
Device Failed
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
P/N:PM1143
REV. 0.02, MAR. 23, 2005
50