MX29LV004B Macronix, MX29LV004B Datasheet - Page 38

• Manufacturer Part Number: MX29LV004B
• Description: 4M-Bit CMOS Single Voltage 3V Only Flash Memory
• Manufacturer: Macronix

Figure 17. IN-SYSTEM SECTOR UNPROTECTION ALGORITHM WITH RESET#=VID
P/N:PM0732
Increment PLSCNT
PLSCNT=1000?
Device failed
No
Yes
No
write 40H to sector address
Remove VID from RESET#
Read from sector address
Chip unprotect complete
Set up first sector address
with A6=1, A1=1, A0=0
with A6=1, A1=1, A0=0
Write reset command
Verify chip unprotect
A6=1, A1=1, A0=0
Chip unprotect :
write 60H with
RESET#=VID
Cycle=60H ?
Wait 50ms
Data=00H
Last sector
First Write
protected?
PLSCNT=1
All sector
START
verified?
38
Wait 1us
Yes
Yes
Yes
No
?
Yes
No
No
MX29LV004T/B
Set up next sector address
Protect all sectors
Temporary Sector
Unprotect Mode
REV. 1.7, DEC. 20, 2004