as29lv016brg-90/xt Austin Semiconductor, Inc., as29lv016brg-90/xt Datasheet - Page 13

• Manufacturer Part Number: as29lv016brg-90/xt
• Description: 16 Megabit 2m X 8-bit / 1m X 16-bit Cmos 3.0 Volt-only Boot Sector Flash Memory
• Manufacturer: Austin Semiconductor, Inc.

AS29LV016
Rev. 2.0 06/06
Sector Protect
Temporary Sector
Unprotect Mode
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 25?
No
Yes
No
No
Write 60h to sector
Protect: Write 40h
to sector address
A6 = 0, A1 = 1,
Sector Protect:
Protect another
RESET# = V
sector address
A1 = 1, A0 = 0
A1 = 1, A0 = 0
Sector Protect
from RESET#
Verify Sector
Set up sector
PLSCNT = 1
Cycle = 60h?
address with
Remove V
with A6 = 0,
with A6 = 0,
Wait 150 µs
Data = 01h?
Write reset
Read from
First Write
command
Wait 1 µs
complete
Austin Semiconductor, Inc.
Figure 2. In-System Sector Protect/Unprotect Algorithms
address
START
sector?
A0 = 0
Yes
Yes
No
ID
ID
Yes
PLSCNT = 1
Reset
The indicated portion
Protect all sectors:
unprotected sectors
13
of the sector protect
prior to issuing the
unprotect address
algorithm must be
performed for all
Sector Unprotect
first sector
Algorithm
Device failed
Increment
PLSCNT
PLSCNT
= 1000?
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
Yes
No
BOO
BOOT SECT
BOO
BOO
BOO
No
No
T SECT
T SECTOR FLASH
T SECT
T SECT
Write 60h to sector
Set up first sector
Sector Unprotect:
Unprotect: Write
Sector Unprotect
A6 = 1, A1 = 1,
A6 = 1, A1 = 1,
sector address
RESET# = V
A1 = 1, A0 = 0
40h to sector
from RESET#
Verify Sector
address with
Cycle = 60h?
PLSCNT = 1
address with
Remove V
with A6 = 1,
Data = 00h?
Write reset
Wait 15 ms
Read from
First Write
Last sector
command
Wait 1 µs
All sectors
protected?
complete
address
verified?
START
A0 = 0
A0 = 0
Yes
Yes
Yes
Yes
ID
ID
No
No
CO
COTS PEM
CO
CO
CO
OR FLASH
OR FLASH
OR FLASH
OR FLASH
AS29LV016
Temporary Sector
Unprotect Mode
next sector
TS PEM
TS PEM
TS PEM
TS PEM
address
Set up