AM29LV081 AMD [Advanced Micro Devices], AM29LV081 Datasheet - Page 9

• Manufacturer Part Number: AM29LV081
• Description: 8 Megabit (1 M x 8-Bit) CMOS 3.0 Volt-only Uniform Sector Flash Memory
• Manufacturer: AMD [Advanced Micro Devices]

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 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, A1, and A0 must be as shown in Table
3. In addition, when verifying sector protection, the sec-
L = Logic Low = V
Manufacturer ID: AMD
Device ID: Am29LV081
Sector Protection Verification
SA10
SA11
SA12
SA13
SA14
SA15
SA0
SA1
SA2
SA3
SA4
SA5
SA6
SA7
SA8
SA9
A19
Description
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ID
IL
, H = Logic High = V
(11.5 V to 12.5 V) on address pin A9.
A18
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Table 3. Am29LV081 Autoselect Codes (High Voltage Method)
A17
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Table 2. Am29LV081 Sector Address Table
A16
CE#
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
IH
L
L
L
, SA = Sector Address, X = Don’t care.
OE#
A15
P R E L I M I N A R Y
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
WE#
A14
H
H
H
Am29LV081
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
A19
A13
SA
to
X
X
A13
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
tor address must appear on the appropriate highest
order address bits (see Table 2). Table 3 shows the re-
maining address bits that are don’t care. When all nec-
essary 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 Table 4. This method
does not require V
details on using the autoselect mode.
A12
A10
to
X
X
X
V
V
V
A9
ID
ID
ID
Sector Size
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
64 Kbytes
A8
A7
to
X
X
X
A6
ID
L
L
L
. See “Command Definitions” for
A5
A2
to
X
X
X
A1
H
L
L
C0000h-CFFFFh
D0000h-DFFFFh
A0000h-AFFFFh
B0000h-BFFFFh
E0000h-EFFFFh
Address Range
00000h-0FFFFh
10000h-1FFFFh
20000h-2FFFFh
30000h-3FFFFh
40000h-4FFFFh
50000h-5FFFFh
60000h-6FFFFh
70000h-7FFFFh
80000h-8FFFFh
90000h-9FFFFh
F0000h-FFFFFh
A0
H
L
L
(unprotected)
(protected)
DQ7
DQ0
01h
38h
01h
00h
to
9