MX29LV004CB Macronix, MX29LV004CB Datasheet - Page 40

• Manufacturer Part Number: MX29LV004CB
• Description: 4M-Bit CMOS Single Voltage 3V Only Flash Memory
• Manufacturer: Macronix

Figure 19. CHIP UNPROTECTION ALGORITHM (A9, OE# Control)
P/N:PM1148
Sector Addr
Increment
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
No
Set Up First Sector Addr
Read Data from Device
Write Reset Command
Remove VID from A9
Set OE#=CE#=VIL
Activate WE# Pulse
Protect All Sectors
Time Out 50ms
Set OE#=A9=VID
CE#=VIL, A6=1
All sectors have
A9=VID,A1=1
been verified?
Chip Unprotect
PLSCNT=1
Data=00H?
START
Complete
40
Yes
Yes
MX29LV004C T/B
No
PLSCNT=1000?
Device Failed
Increment
PLSCNT
Yes
No
REV. 1.1, AUG. 30, 2005