MX29LV040 Macronix, MX29LV040 Datasheet - Page 36

• Manufacturer Part Number: MX29LV040
• Description: 4M-Bit CMOS Single Voltage 3V Flash Memory
• Manufacturer: Macronix

Figure 16. CHIP UNPROTECTED ALGORITHM
P/N:PM0722
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
All sectors have
Set OE#=A9=VID
CE#=VIL, A6=1
A9=VID,A1=1
been verified?
Chip Unprotect
PLSCNT=1
Data=00H?
36
START
Complete
Yes
Yes
No
MX29LV040
PLSCNT=1000?
Device Failed
Increment
PLSCNT
Yes
No
REV. 1.3, DEC. 20, 2004