ES29LV320D Datasheet, PDF (18/59 Pages) Excel Semiconductor Inc. – 32Mbit(4M x 8/2M x 16) CMOS 3.0 Volt-only, Boot Sector Flash Memory

A9 High-Voltage Method
EE SS II
Excel Semiconductor inc.
Start
COUNT = 1
SET A9=OE#=V_ID
Set Sector Address
A<20 :12>
CE#, A6, A0=V_IL
RESET#, A1=V_IH
Increase COUNT
SET WE# = V_IL
Wait 150 us
SET WE# = V_IH
No
COUNT= 25?
CE#,OE#,A6,A0=V_IL
RESET#, A1 = V_IH
Read Data
No
Data = 01h?
Yes
Device failed
Yes
Yes
Protect Another
Sector ?
No
Remove V_ID from
A9 and Write
Reset Command
Sector Protection
Complete
Increase COUNT
Start
Note: All sectors must be
previously protected.
COUNT = 1
SET A9=OE#=V_ID
CE#, A0=V_IL ,
RESET#,
A6, A1=V_IH
SET WE# = V_IL
Wait 15ms
SET WE# = V_IH
CE#,OE#, A0=V_IL
RESET#, A6, A1=V_IH
Set Sector AddressA<20 :12>
No
Read Data
No
COUNT=1000?
Data = 00h?
Yes
Device failed
Yes
The Last Sector
Address ?
Increase Sector
Address
No
Yes
Remove V_ID from A9 and
Write Reset Command
Sector Unprotection
Complete
Figure 5. Sector Protection Algorithm
(A9 High-Voltage Method)
ES29LV320D
Figure 6. Sector Un-Protection Algorithm
(A9 High-Voltage Method)
18
Rev. 2D Jan 5, 2006