AM29LV2562M AMD [Advanced Micro Devices], AM29LV2562M Datasheet - Page 26

• Manufacturer Part Number: AM29LV2562M
• Manufacturer: AMD [Advanced Micro Devices]

Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector group protection verifica-
tion, through identifier codes output on DQ7–DQ0.
This mode is primarily intended for programming
equipment to automatically match a device to be pro-
grammed with its corresponding programming algo-
rithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires
A6, A3, A2, A1, and A0 must be as shown in Table 3.
Manufacturer ID: AMD
Sector Group
Protection Verification
SecSi Sector Indicator
Bit (DQ7), WP#
protects highest
address sector
SecSi Sector Indicator
Bit (DQ7), WP#
protects lowest
address sector
Legend: L = Logic Low = V
24
Description
Cycle 1
Cycle 2
Cycle 3
V
ID
on address pin A9. Address pins
CE#
L
L
L
L
L
IL
, H = Logic High = V
OE# WE#
L
L
L
L
L
Table 3. Autoselect Codes, (High Voltage Method)
H
H
H
H
H
A23
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 S H E E T
V
V
V
V
V
A9
ID
ID
ID
ID
ID
Am29LV2562M
A8
A7
to
X
X
X
X
X
A6
L
L
L
L
L
A5
A4
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see Table 2). Table 3 shows the remain-
ing address bits that are don’t care. When all neces-
sary 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 Tables
method does not require V
Command Sequence
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
WORD#
DQ23 to DQ16
= V
00
22
22
22
X
X
X
section for more information.
IH
WORD#
ID
= V
. Refer to the
X
X
X
X
X
X
X
IL
December 16, 2005
18h (not factory locked)
08h (not factory locked)
98h (factory locked),
88h (factory locked),
00h (unprotected)
01h (protected),
10
DQ7 to DQ0
and 11. This
01h
7Eh
12h
01h
Autoselect