EN29LV800 EON [Eon Silicon Solution Inc.], EN29LV800 Datasheet - Page 23

• Manufacturer Part Number: EN29LV800
• Description: 8 Megabit (1024K x 8-bit / 512K 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
4800 Great America Parkway, Suite 202
Santa Clara, CA 95054
Protect all sectors:
portion of the sector
must be performed
for all unprotected
protect algorithm
sector unprotect
issuing the first
sectors prior to
The indicated
address (see
Diagram 7a.)
PLSCCNT =
Device failed
Increment
PLSCNT
1000?
Yes
No
No
Sector Unprotect: Write 60H to
Rev 0.4 Release Date: 2002/01/29
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
Wait 0.4 S
Data = 00h?
Last sector
First Write
All sectors
protected?
Wait 15 ms
RESET#
Wait 1 S
verified?
address
START
ID
Yes
from
Yes
Yes
Yes
23
ID
No
No
Set up next sector
Write reset
command
address
Temporary Sector
Unprotect Mode
Sector Unprotect
EN29LV800
Tel: [phone]
Fax: [phone]
complete