MX29F200T Datasheet, PDF (35/46 Pages) Macronix International – 2M-BIT [256Kx8/128Kx16] CMOS FLASH MEMORY

MX29F200T/B
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
Set OE=CE=VIL
A9=VID,A1=1
Set Up First Sector Addr
Increment
PLSCNT
Increment
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
No
PLSCNT=1000?
Yes
Device Failed
* It is recommended before unprotect the whole chip, all sectors should be protected in advance.
P/N:PM0549
REV. 1.3 , DEC. 24, 2001
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