A29DL324 Datasheet, PDF (18/46 Pages) AMIC Technology – 32M-Bit CMOS Low Voltage Dual Operation Flash Memory 4M-Byte by 8-Bit (Byte Mode) / 2M-Word by 16-Bit (Word Mode)

A29L323 Series
START
RESET=VID
Wait 4 us
Sector Group Protection
Address=Don't Care, Data=60H
Yes
All Sector Group Protected?
No
n=0
Verify Sector Group Protection
(A6, A1, A0)=(VIL, VIH, VIL)
A12 to A20=SGA, Data=40H
Read from Sector Group Address
(A6, A1, A0)=(VIL, VIH, VIL),
A12 to A20=SGA
Sector Group Protection ^No
Data=0H?
Yes
Last Sector Group (n=25)?
Yes
n=0, Pluse Count=1
No Next Sector Group Address
(n=n+1)
Sector Group Unprotect
(A6, A1, A0)=(VIH, VIH, VIL),
Data=60H
Timeout 15ms
Increment Pulse
No
Pulse Count=1000?
Yes
Remove VID from RESET,
Write Reset Command
Verify Sector Group Protection
(A6, A1, A0)=(VIH, VIH, VIL),
Address=SGA, Data=40H
Read from Sector Group Address
(A6, A1, A0)=(VIH, VIH, VIL),
A12 to A20=SGA
No
Data=00H?
Yes
Last Sector Group (n=25)?
Yes
Remove VID from RESET,
Write Reset Command
Yes _{Next Sector Group Address}
(n=n+1)
Fail
Sector Group Protect Complete
Figure 2. Sector Group Unprotect Flow Chart
PRELIMINARY (May, 2002, Version 0.0)
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AMIC Technology, Inc.