s29as008j Meet Spansion Inc., s29as008j Datasheet - Page 16

• Manufacturer Part Number: s29as008j
• Description: 8 Megabit 1 M X 8-bit/512 K X 16-bit Cmos 1.8 Volt-only Boot Sector Flash Memory
• Manufacturer: Meet Spansion Inc.

7.9
Legend
L = Logic Low = V
Note
The autoselect codes may also be accessed in-system via command sequences. See
16
Manufacturer ID:
Spansion
Device ID
Sector Protection
Verification
Secured Silicon Sector
Indicator Bit (DQ7), WP#
protects highest address
sector
Secured Silicon Sector
Indicator Bit (DQ7), WP#
protects lowest address
sector
Description
Cycle 1
Cycle 2
Cycle 3
Autoselect Mode
IL
, H = Logic High = V
The autoselect mode provides manufacturer and device identification, sector protection verification, and
Secured Silicon Sector status through identifier codes output on DQ7–DQ0. 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, the autoselect mode requires V
Address pins A6, A3, A2, A1, and A0 must be as shown in
protection, the sector address must appear on the appropriate highest order address bits (see
on page 17
all necessary bits have been set as required, the programming equipment may then read the corresponding
identifier code on DQ7-DQ0.
To access the autoselect codes in-system, the host system can issue the autoselect command via the
command register, as shown in
Definitions on page 28
CE#
L
L
L
L
L
L
L
OE#
and
L
L
L
L
L
L
L
IH
Table 7.2 S29AS008J Autoselect Codes (High Voltage Method)
, SA = Sector Address, X = Don’t care
Table 7.4 on page
WE#
H
H
H
H
H
H
H
for details on using the autoselect mode.
D a t a
A18
A12
SA
to
X
X
X
X
X
X
A11
A10
Table 11.1 on page
to
X
X
X
X
X
X
X
S h e e t
18).
V
V
V
V
V
V
V
A9
ID
ID
ID
ID
ID
ID
ID
Table 7.2
S29AS008J
A8
A7
to
X
X
X
X
X
X
X
( A d v a n c e
A6
L
L
L
L
L
L
L
Table 11.1 on page
shows the remaining address bits that are don’t care. When
33. This method does not require V
A5
A4
to
X
X
X
X
X
X
X
A3
A2
to
H
H
L
L
L
L
L
Table
A1
H
H
H
H
H
L
L
I n f o r m a t i o n )
33.
7.2. In addition, when verifying sector
A0
H
H
H
H
L
L
L
ID
(9.0 V to 11.0 V) on address pin A9.
BYTE =
DQ8 to DQ15
00h
22h
22h
22h
V
X
X
X
IH
S29AS008J_00_03 June 6, 2008
BYTE =
V
X
X
X
X
X
X
X
IL
ID
09h (not factory locked)
11h (not factory locked)
. See
89h (factory locked),
91h (factory locked),
03h (Bottom Boot)
00h (unprotected)
01h (protected),
04h (Top Boot),
Table 7.3
Command
DQ7
DQ0
7Eh
01h
04h
to