AM29LV320MB SPANSION [SPANSION], AM29LV320MB Datasheet - Page 19

• Manufacturer Part Number: AM29LV320MB
• Manufacturer: SPANSION [SPANSION]

Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7–DQ0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be pro-
grammed 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
A6, A3, A2, A1, and A0 must be as shown in
Legend: L = Logic Low = V
26518C3 January 31, 2007
Manufacturer ID: AMD
Sector Protection
Verification
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects top two
address sector
Secured Silicon Sector
Indicator Bit (DQ7),
WP# protects bottom
two address sector
Description
Cycle 1
Cycle 2
Cycle 3
ID
on address pin A9. Address pins
CE#
IL
L
L
L
L
L
, H = Logic High = V
OE# WE#
L
L
L
L
L
Table 4. Autoselect Codes, (High Voltage Method)
H
H
H
H
H
A21
A15
SA
to
X
X
X
X
IH
, SA = Sector Address, X = Don’t care.
A14
A10
to
X
X
X
X
X
D A T A
Table
V
V
V
V
V
A9
ID
ID
ID
ID
ID
Am29LV320MT/B
A8
A7
to
X
X
X
X
X
4.
A6
L
L
L
L
L
S H E E T
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see Tables
remaining address bits that are don’t care. When all
necessary bits have been set as required, the pro-
gramming equipment may then read the correspond-
ing 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 Tables
method does not require V
Command Sequence
A5
A4
to
X
X
X
X
X
A3
A2
to
H
H
L
L
L
L
L
A1
H
H
H
H
H
L
L
A0
H
H
H
H
L
L
L
BYTE#
= V
DQ8 to DQ15
00
22
22
22
section for more information.
X
X
X
IH
2
BYTE#
ID
and 3).
= V
. Refer to the
X
X
X
X
X
X
X
IL
18h (not factory locked)
08h (not factory locked)
Table 4
98h (factory locked),
88h (factory locked),
00h (unprotected)
00 (bottom boot)
01h (protected),
01h (top boot)
12
DQ7 to DQ0
and 13. This
7Eh
1Ah
01h
Autoselect
shows the
17