HY29F002T Datasheet, PDF (8/38 Pages) Hynix Semiconductor – 2 Megabit (256K x 8), 5 Volt-only, Flash Memory

HY29F002T
START
APPLY V _CC
Set TRYCNT = 1
Set A[9] = OE# = V _ID
Set Address:
A[17:13] = Sector to Protect
CE# = V _IL
RESET# = V _IH
WE# = V _IL
Wait t_WPP1
WE# = V _IH
A[9] = V _ID
A[17:13] = Sector to Protect
OE# = CE# = V _IL
A[6] = A[0] = V _IL
A[1] = V _IH
Read Data
NO
Data = 0x01?
Increment TRYCNT
NO
TRYCNT = 25?
YES
YES
Protect Another ^NO
Sector?
YES
DEVICE FAILURE
Figure 1. Sector Protect Procedure
Remove V _ID from A[9]
SECTOR PROTECT
COMPLETE
8
Rev. 4.1/May 01