AUSTIN SEMICONDUCTOR, INC.
Austin Semiconductor, Inc.
If RESET\ is asserted during a PROGRAM or ERASE opera-
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
AS8FLC1M32
FLASH
Bottom Boot Sector Address Table
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
appropriate Byte DQ’s.
To access the autoselect codes in-system, the host system
can issue the autoselect command via the command register.
Autoselect Code Table
PROGRAM or ERASE operation is not executing (RY/BY\ pin
is “1”), the RESET operation is completed within a time of
tREADY. The system can read data tRH after the RESET\ pin
returns to VIH.
Refer to the “AC Characteristics” tables for RESET\ parameters.
Sector Protect Algorithm Flow
START
PLSCNT = 1
RESET# = V
ID
T
Output Disable Mode
When the OE\ input is at VIH, output from the device is disabled.
The output pins are placed in the high Impedance State.
Autoselect Mode
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.
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
No
Wait 1 ms
Temporary
Sector
Unprotect Mode
First Write
Cycle = 60h?
Yes
Set up sector
address
Sector
Protect:
Write 60h to
sector
address
with
A6 = 0, A1 = 1,
A0 = 0
Wait 150 µs
Verify
Sector
Protect: Write 40h
to
sector address
with A6 = 0,
A1 = 1, A0 = 0
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
Increment
PLSCNT
Reset
PLSCNT = 1
No
No
PLSCNT
= 25?
Yes
Data = 01h?
Yes
Yes
Device failed
Protect
another
sector?
No
Remove V
ID
from RESET#
Write reset
command
Sector
Protect
Algorithm
Sector
Protect
complete
Description
Manufacturers ID
CS1\
L
X
H
H
L
H
H
H
L
H
H
H
L
H
H
H
Device ID
Sector Protection Verification
CS2\
H
L
H
H
H
L
H
H
H
L
H
H
H
L
H
H
CS3\
H
H
L
H
H
H
L
H
H
H
L
H
H
H
L
H
CS4\
H
H
H
L
H
H
H
L
H
H
H
L
H
H
H
L
OEX\
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
WEx\
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
A19 to
A13
X
X
X
X
X
X
X
X
SA
SA
SA
SA
SA
SA
SA
SA
A12 to
A10
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A9
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
VID
A8 to
A7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A6
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
A5 to
A2
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A1
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
L
L
L
L
A0
DQx [Output]
DQ0-7 [01h]
DQ8-15 [01h]
DQ16-23 [01h]
DQ24-31 [01h]
DQ0-7 [5Bh]
DQ8-15 [5Bh]
DQ16-23 [5Bh]
DQ24-31 [5Bh]
DQ0-7 [01h] Protected
DQ8-15 [01h] Protected
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
AS8FLC1M32B
Rev. 3.3 05/08
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
5
AUSTIN [ AUSTIN SEMICONDUCTOR ]
