ESMT
F49L160UA/F49L160BA
Operation Temperature condition -40°C~85°C
Figure 18. Sector Protection Algorithm (A9,
Control)
OE
Start
Set up sector address
PLSCNT = 1
OE = VID, A9 = VID, CE = VIL
A6 = VIL
Activate WE Pluse
Time out 150us
Set WE = VIH , CE = OE = VIL
A9 should remain VID
Read from Sector
Address = SA, A0=1, A1 = 1
No
No
Data = 01H?
PLSCNT = 32?
Yes
Device Failed
Yes
Protect Another
Sector?
Remove VID from A9
Write reset command
Sector Protection
Complete
Elite Semiconductor Memory Technology Inc.
Publication Date : Jan. 2008
Revision: 1.4 40/51