AM29LV256MH113REI AMD (ADVANCED MICRO DEVICES), AM29LV256MH113REI Datasheet - Page 25

• Manufacturer Part Number: AM29LV256MH113REI
• Description: Flash Memory IC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM29LV256MH113REI

• Memory Size: 256Mbit
• Package/case: 56-TSOP
• Access Time, Tacc: 110nS
• Mounting Type: Surface Mount
• Supply Voltage: 3V

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
Legend: L = Logic Low = V
December 16, 2005
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
Description
Cycle 1
Cycle 2
Cycle 3
V
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 3. Autoselect Codes, (High Voltage Method)
H
H
H
H
H
A22
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
Table
V
V
V
V
V
A9
ID
ID
ID
ID
ID
Am29LV256M
A8
A7
to
X
X
X
X
X
3.
A6
L
L
L
L
L
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see
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
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
Table
BYTE#
= V
DQ8 to DQ15
00
22
22
22
section for more information.
X
X
X
IH
2).
BYTE#
Table 3
ID
= V
. Refer to the
X
X
X
X
X
X
X
IL
18h (not factory locked)
08h (not factory locked)
shows the remain-
98h (factory locked),
88h (factory locked),
00h (unprotected)
01h (protected),
11
DQ7 to DQ0
and 12. This
7Eh
01h
12h
01h
Autoselect
23