A29L320A AMICC [AMIC Technology], A29L320A Datasheet - Page 16

• Manufacturer Part Number: A29L320A
• Description: 4M X 8 Bit / 2M X 16 Bit CMOS 3.0 Volt-only, Boot Sector Flash Memory
• Manufacturer: AMICC [AMIC Technology]

(November, 2007, Version 1.1)
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 Protec:
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
First Write
Read from
with A6=0,
command
Wait 1 us
complete
address
START
sector?
A0=0
Yes
No
Yes
ID
ID
Figure 2-1. In-System Sector Protect/Unprotect
Yes
PLSCNT=1
Reset
Algorithms
unprotected sectors prior
to issuing the first sector
The indicated portion of
Protect all sectors:
algorithm must be
unprotect address
the sector protect
performed for all
15
Sector Unprotect
Algorithm
Device failed
Increment
PLSCNT=
PLSCNT
1000?
No
Yes
No
No
address with A6=1,
address with A6=1,
address with A6=1,
Write 60h to sector
Sector Unprotect:
Set up first sector
Read from sector
Unprotect : Write
Sector Unprotect
40h to sector
Verify Sector
RESET=V
Cycle=60h?
A1=1, A0=0
A1=1, A0=0
A1=1, A0=0
from RESET
Remove V
PLSCNT=1
Wait 15 ms
Data=00h?
Last sector
protected?
Write reset
First Write
All sectors
Command
Wait 1 us
complete
AMIC Technology, Corp.
verified?
START
address
Yes
Yes
Yes
Yes
A29L320A Series
ID
ID
No
No
Temporary Sector
next sector
Unprotect Mode
address
Set up