EN29LV160 EON [Eon Silicon Solution Inc.], EN29LV160 Datasheet - Page 25

• Manufacturer Part Number: EN29LV160
• Description: 16 Megabit (2048K x 8-bit / 1024K x 16-bit) Flash Memory Boot Sector Flash Memory, CMOS 3.0 Volt-only
• Manufacturer: EON [Eon Silicon Solution Inc.]

Sector
Unprotect
Algorithm
Flowchart 7b. In-System Sector Unprotect Flowchart
This Data Sheet may be revised by subsequent versions
or modifications due to changes in technical specifications.
The indicated portion
first sector unprotect
Protect all sectors:
of the sector protect
unprotected sectors
prior to issuing the
algorithm must be
performed for all
address (see
Diagram 7a.)
PLSCCNT =
Device failed
Increment
PLSCNT
1000?
Yes
No
No
Sector Unprotect: Write 60H to
Read from sector address with
No
Write 40h to sector address
sector address with A6 = 1,
with A6 = 1, A1 = 1, A0 =0
Verify Sector Unprotect:
A6 = 1, A1 = 1, A0 = 0
Remove V
Set up first sector
RESET# = V
Cycle = 60h?
A1 = 1, A0 = 0
PLSCNT = 1
Data = 00h?
Wait 0.4 µS
Last sector
protected?
First Write
All sectors
Wait 15 ms
RESET#
Wait 1 µS
verified?
address
START
Rev. A, Issue Date: 2004/03/30
ID
Yes
from
Yes
Yes
Yes
25
ID
©2003 Eon Silicon Solution, Inc., www.essi.com.tw
No
No
Set up next sector
Write reset
command
address
Temporary Sector
Unprotect Mode
Sector Unprotect
EN29LV160
complete