MX29L3211 Macronix International, MX29L3211 Datasheet - Page 29

• Manufacturer Part Number: MX29L3211
• Description: CMOS SINGLE VOLTAGE PAGEMODE FLASH EEPROM
• Manufacturer: Macronix International

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Figure 11. SECTOR UNPROTECT ALGORITHM
P/N:PM0641
NOTE :
*Only the Top or the Bottom Sector Address is vaild in this feature.
i.e. Sector Address = (A20,A19,A18,A17,A16) = 00000B or 11111B
Write Data AAH Address 5555H
Write Data 55H Address 2AAAH
Write Data AAH Address 5555H
Write Data 40H, Sector Address*
Write Data 60H Address 5555H
Write Data 55H Address 2AAAH
Operation Terminated
Read Status Register
Protect Sector
Read S.R. Mode
Device Stays at
Verify Protect
PLSCNT=0
SR7 = 1
Status ?
START,
To
?
YES
NO
YES
NO
Verify Protect Status Flow
(Figure 12)
29
Write Data AAH Address 5555H
Write Data 55H Address 2AAAH
Sector Unprotected,Operation
Write Data AAH Address 5555H
Write Data 40H, Sector Address*
Write Data 60H Address 5555H
To Unprotect Sector Again
Write Data 55H Address 2AAAH
Verify Sector Protect Mode
Increment PLSCNT,
Done, Device Stays at
Read Status Register
MX29L3211
= 00H ?
PLSCNT
SR7 = 1
Data
= 25 ?
?
NO
NO
YES
YES
NO
YES
REV. 0.3, NOV. 06, 2001
Device Failed