A29L008ATV-70 AMICC [AMIC Technology], A29L008ATV-70 Datasheet - Page 10

• Manufacturer Part Number: A29L008ATV-70
• Description: 1M X 8 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

(October, 2006, Version 1.0)
Sector Protect
Temporary Sector
Unprotect Mode
Algorithm
Device failed
PLSCNT
Increment
PLSCNT
=25?
No
Yes
No
No
address with A6=0,
Write 60h to sector
Protect: Write 40h
to sector address
with A6=0, A1=1,
Protect another
sector address
Sector Protect
Sector Protect
Set up sector
Verify Sector
from RESET
RESET=V
Remove V
Cycle=60h?
A1=1, A0=0
Wait 150 us
A1=1, A0=0
PLSCNT=1
Data=01h?
Write reset
Read from
with A6=0,
First Write
command
Wait 1 us
complete
address
START
sector?
A0=0
Figure 2. In-System Sector Protect/Unprotect Algorithms
Yes
No
Yes
ID
ID
Yes
PLSCNT=1
Reset
unprotected sectors prior
to issuing the first sector
The indicated portion of
Protect all sectors:
unprotect address
algorithm must be
the sector protect
performed for all
Sector Unprotect
9
Algorithm
Device failed
PLSCNT=
Increment
PLSCNT
1000?
No
Yes
No
No
Write 60h to sector
address with A6=1,
address with A6=1,
address with A6=1,
Sector Unprotect:
Set up first sector
Read from sector
Unprotect : Write
Sector Unprotect
Verify Sector
40h to sector
from RESET
RESET=V
Cycle=60h?
A1=1, A0=0
A1=1, A0=0
A1=1, A0=0
Remove V
PLSCNT=1
Wait 15 ms
Last sector
Data=00h?
All sectors
protected?
Write reset
First Write
Command
Wait 1 us
complete
verified?
START
address
AMIC Technology, Corp.
Yes
Yes
Yes
Yes
ID
ID
A29L008A Series
No
No
Temporary Sector
next sector
Unprotect Mode
address
Set up