AUSTIN SEMICONDUCTOR, INC.
FLASH
AS8FLC1M32
Austin Semiconductor, Inc.
If RESET\ is asserted during a PROGRAM or ERASE opera-
Bottom Boot SectorAddress Table
tion, the RY/BY\ pin remains a “0” (busy) until the internal
reset operation is complete, which requires a time of tREADY.
The system can thus monitor RY/BY\ to determine whether the
RESET operation is complete. If RESET\ is asserted when a
12.5v) on address pin A9. Address pins A6, A1, and A0 must
be as shown in the Autoselect Table below. In addtion, when
verifying sector protection, the sector address must appear on
the appropriate highest order address bits. When all necessary
bits have been set as required, the programming equipment
may then read the corresponding identifier code on the
Autoselect Code Table
PROGRAM or ERASE operation is not executing (RY/BY\ pin appropriate Byte DQ’s.
is “1”), the RESET operation is completed within a time of
tREADY. The system can read data tRH after the RESET\ pin To access the autoselect codes in-system, the host system
returns to VIH.
can issue the autoselect command via the command register.
Refer to the “AC Characteristics” tables for RESET\ parameters.
Sector ProtectAlgorithm Flow
START
Output Disable Mode
PLSCNT = 1
T
RESET# = VID
Wait 1 ms
When the OE\ input is at VIH, output from the device is disabled.
The output pins are placed in the high Impedance State.
No
First Write
Cycle = 60h?
Temporary Sector
Unprotect Mode
Yes
Set up sector
address
Autoselect Mode
Sector Protect:
Write 60h to sector
address with
A6 = 0, A1 = 1,
A0 = 0
The autoselect mode provides manufacturer and device
identification, and sector protection verification through
identifier codes output via the appropriate Byte DQ’s. This
mode is primarily intended for programming equipment to
automatically match a device to be programmed with its
corresponding programming algorithm. However, the
autoselect codes can also be accessed in-system through the
command register.
Wait 150 µs
Verify Sector
Protect: Write 40h
to sector address
with A6 = 0,
Reset
PLSCNT = 1
Increment
PLSCNT
A1 = 1, A0 = 0
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
No
No
PLSCNT
= 25?
Data = 01h?
Yes
Yes
Yes
When using programming equipment (modified to support
multi-byte devices, or supplied from the programming equip-
ment provider as such), the autoselect mode requires VID
(11.5v to
Protect another
sector?
Device failed
No
Remove VID
from RESET#
Write reset
command
Sector Protect
Algorithm
Sector Protect
complete
A19 to A12 to
A13 A10
A8 to
A7
A5 to
A2
Description
Manufacturers ID
CS1\ CS2\ CS3\ CS4\ OEX\ WEx\
A9
VID
A6
A1
A0
DQx [Output]
L
H
L
H
H
H
H
L
L
H
H
X
X
X
X
X
L
L
X
L
L
L
L
DQ0-7 [01h]
DQ8-15 [01h]
X
VID
VID
X
X
X
X
H
H
L
H
L
H
X
X
X
X
X
X
X
L
L
L
DQ16-23 [01h]
H
L
H
H
L
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
H
H
X
X
X
X
X
X
VID
VID
VID
VID
VID
VID
X
X
X
X
X
X
L
L
L
L
L
L
X
X
X
X
X
X
L
L
L
L
L
H
L
DQ24-31 [01h]
DQ0-7 [5Bh]
Device ID
H
H
H
L
H
H
H
H
L
H
H
H
L
DQ8-15 [5Bh]
H
H
H
DQ16-23 [5Bh]
DQ24-31 [5Bh]
DQ0-7 [01h] Protected
H
H
Sector Protection Verification
H
SA
SA
SA
SA
SA
SA
SA
SA
H
H
H
L
L
H
L
H
H
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
X
X
X
X
X
X
X
VID
VID
VID
VID
VID
VID
VID
X
X
X
X
X
X
X
L
L
L
L
L
L
L
X
X
X
X
X
X
X
H
H
H
H
H
H
H
L
L
L
L
L
L
L
DQ8-15 [01h] Protected
H
H
H
L
DQ16-23 [01h] Protected
DQ24-31 [01h] Protected
DQ0-7 [00h] Un-Protected
DQ8-15 [00h] Un- Protected
DQ16-23 [00h]Un-Protected
DQ24-31 [00h] Un-Protected
H
H
H
L
H
H
H
L
H
H
H
H
H
H
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
AS8FLC1M32B
Rev. 3.3 05/08
5
AUSTIN [ AUSTIN SEMICONDUCTOR ]
