MX29F400T/B
AUTOMATIC SECTOR ERASE ALGORITHM FLOWCHART (WORD MODE)
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 80H Address 555H
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 30H Sector Address
NO
Toggle Bit Checking
Invalid Command
Q6 Toggled ?
YES
Load Other Sector Addrss If Necessary
(Load Other Sector Address)
Last Sector
NO
to Erase
YES
Time-out Bit
NO
Checking Q3=1 ?
YES
Toggle Bit Checking
NO
Q6 not Toggled
YES
DATA Polling
Q7 = 1
Auto Sector Erase Completed
NO
Q5 = 1
YES
Reset
Auto Sector Erase Exceed
Timing Limit
P/N:PM0439
REV. 1.6, NOV. 12, 2001
28