W19B320ATB Datasheet, PDF (33/53 Pages) Winbond – 4M × 8/2M × 16 BITS 3V FLEXIBLE BANK FLASH MEMORY

W19B320AT/B
7.8 Security Sector Protect Verify
START
Enter Security
Sector
#RESET =
V IH or V ID
Wait 1 μ s
Write 60h to
any address
Write 40h to Security
Sector Address
with A6 = 0
A1 = 1, A0 = 0
Read from Security
Sector address
with A6 = 0
A1 = 1, A0 = 0
If data = 00h,
Security Sector is
unprotected.
If data = 01h,
Security Sector is
producted.
Remove
V _{IH or V ID}
from #RESET
Write reset
command
Exit Security
Sector
Security Sector
Protect Verify
complete
7.9 Program Algorithm
START
Write Program
Command Sequence
Embedded
Program
algorithm
in progress
Data Poll
from System
Increment Address
Verify Data?
No
Yes
No
Last Address?
Yes
Programming
Completed
- 33 -
Publication Release Date: December 27, 2005
Revision A4