EN29LV160A Datasheet, PDF (23/43 Pages) Eon Silicon Solution Inc. – 16 MEGABIT (2048K X 8- BIT / 1024 K X 16-BIT) FLASH MEMORY

Flowchart 7a. In-System Sector Protect Flowchart
START
PLSCNT = 1
RESET# = V_ID
Wait 1 µs
EN29LV160A
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
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
Reset
PLSCNT = 1
This Data Sheet may be revised by subsequent versions ₂₃ ©2004 Eon Silicon Solution, Inc., www.essi.com.tw
or modifications due to changes in technical specifications.
Rev. C, Issue Date: 2005/01/07