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AM29LV320MB100E Datasheet

  • AM29LV320MB100E

  • 32 Megabit (2 M x 16-Bit/4 M x 8-Bit) MirrorBit 3.0 Volt-onl...

  • 1335.99KB

  • 61页

  • AMD

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D A T A S H E E T
Autoselect Mode
The autoselect mode provides manufacturer and de-
vice identification, and sector protection verification,
through identifier codes output on DQ7鈥揇Q0. This
mode is primarily intended for programming equip-
ment to automatically match a device to be pro-
grammed with its corresponding programm ing
algorithm. However, the autoselect codes can also be
accessed in-system through the command register.
When using programming equipment, the autoselect
mode requires
V
ID
on address pin A9. Address pins
A6, A3, A2, A1, and A0 must be as shown in
Table 4.
In addition, when verifying sector protection, the sector
address must appear on the appropriate highest order
address bits (see Tables
2
and
3). Table 4
shows the
remaining address bits that are don鈥檛 care. When all
necessary bits have been set as required, the pro-
gramming equipment may then read the correspond-
ing identifier code on DQ7鈥揇Q0.
To access the autoselect codes in-system, the host
system can issue the autoselect command via the
command register, as shown in Tables
12
and
13.
This
method does not require V
ID
. Refer to the
Autoselect
Command Sequence
section for more information.
Table 4.
Description
CE#
Autoselect Codes, (High Voltage Method)
A9
A8
to
A7
X
A6
A5
to
A4
X
A3
to
A2
L
L
A21 A14
OE# WE# to
to
A15 A10
L
H
X
X
DQ8 to DQ15
A1
A0
BYTE# BYTE#
= V
IH
= V
IL
00
22
22
22
X
X
X
X
X
X
DQ7 to DQ0
Manufacturer ID: AMD
Device ID
Cycle 1
Cycle 2
Cycle 3
L
V
ID
L
L
L
H
H
H
L
H
L
H
L
01h
7Eh
1Ah
00 (bottom boot)
01h (top boot)
01h (protected),
00h (unprotected)
98h (factory locked),
18h (not factory locked)
L
L
H
X
X
V
ID
X
L
X
H
H
Sector Protection
Verification
SecSi Sector Indicator
Bit (DQ7), WP#
protects top two
address sector
SecSi Sector Indicator
Bit (DQ7), WP#
protects bottom two
address sector
L
L
H
SA
X
V
ID
X
L
X
L
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
L
L
H
X
X
V
ID
X
L
X
L
H
H
X
X
88h (factory locked),
08h (not factory locked)
Legend:
L = Logic Low = V
IL
, H = Logic High = V
IH
, SA = Sector Address, X = Don鈥檛 care.
16
Am29LV320MT/B
May 16, 2003

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