IMX29F002 Macronix International, IMX29F002 Datasheet - Page 35

• Manufacturer Part Number: IMX29F002
• Description: 2M-BIT [256K x 8] CMOS FLASH MEMORY
• Manufacturer: Macronix International

MX29F002/002N
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITH 12V
START
Protect All Sectors
PLSCNT=1
Set OE=A9=VID
CE=VIL,A6=1
Activate WE Pulse
Time Out 12ms
Increment
PLSCNT
Set OE=CE=VIL
A9=VID,A1=1
Set Up First Sector Addr
Read Data from Device
No
No
Data=00H?
PLSCNT=1000?
Increment
Sector Addr
Yes
Yes
Device Failed
No
All sectors have
been verified?
Yes
Remove VID from A9
Write Reset Command
Chip Unprotect
Complete
* It is recommended before unprotect the whole chip, all sectors should be protected in advance.
REV. 1.1, JUN. 14, 2001
P/N: PM0547
35