EN29LV160 Datasheet, PDF (24/45 Pages) Eon Silicon Solution Inc. – 16 Megabit (2048K x 8-bit / 1024K x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only

Flowchart 7a. In-System Sector Protect Flowchart
START
PLSCNT = 1
RESET# = V_ID
Wait 1 µs
EN29LV160
No
Temporary Sector
Unprotect Mode
First Write
Cycle =
60h?
Yes
Set up sector
address
Sector Protect: Write 60h
to sector addr with
A6 = 0, A1 = 1, A0 = 0
Increment
PLSCNT
Wait 150 µs
Verify Sector Protect:
Write 40h to sector
address with
A6 = 0, A1 = 1, A0 = 0
Wait 0.4 µs
Reset
PLSCNT = 1
Read from sector
address with
A6 = 0, A1 = 1, A0
No
No
PLSCNT = 25?
Data = 01h?
Yes
Device failed
Yes
Protect another
Yes
sector?
No
Remove V_ID
from RESET#
Sector Protect
Algorithm
Write reset
command
Sector Protect
complete
This Data Sheet may be revised by subsequent versions ₂₄ ©2003 Eon Silicon Solution, Inc., www.essi.com.tw
or modifications due to changes in technical specifications.
Rev. A, Issue Date: 2004/03/30