AM29F100 AMD [Advanced Micro Devices], AM29F100 Datasheet - Page 9

• Manufacturer Part Number: AM29F100
• Description: 1 Megabit (128 K x 8-bit/64 K x 16-bit) CMOS 5.0 Volt-only, Boot 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
A9. Address pins A6, A1, and A0 must be as shown in
Autoselect Codes (High Voltage Method) table. In ad-
dition, when verifying sector protection, the sector ad-
L = Logic Low = V
Manufacturer ID: AMD
Device ID:
Am29F100
(Top Boot Block)
Device ID:
Am29F100
(Bottom Boot Block)
Sector Protection Verification
SA0
SA1
SA2
SA3
SA4
SA0
SA1
SA2
SA3
SA4
Description
IL
ID
A15
A15
, H = Logic High = V
0
1
1
1
1
0
0
0
0
1
(11.5 V to 12.5 V) on address pin
Mode
Word
Word
Byte
Byte
Table 4. Am29F100 Autoselect Codes (High Voltage Method)
CE#
Table 2. Sector Addresses Tables (Am29F100T)
Table 3. Sector Addresses Tables (Am29F100B)
A14
A14
L
L
L
L
L
L
X
X
0
1
1
1
0
0
0
1
IH
OE#
, SA = Sector Address, X = Don’t care.
L
L
L
L
L
L
WE#
H
H
H
H
H
H
A13
A13
X
X
X
X
0
0
1
0
1
1
A15
A12
SA
to
X
X
X
Am29F100
A11
A10
to
X
X
X
X
A12
A12
dress must appear on the appropriate highest order
address bits. Refer to the corresponding Sector Ad-
dress Tables. The Command Definitions table shows
the remaining address bits that are don’t care. When all
necessary bits have been set as required, the program-
ming 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 the Command Defini-
tions table. This method does not require V
“Command Definitions” for details on using the autose-
lect mode.
X
X
X
X
X
X
0
1
0
1
V
V
V
V
A9
ID
ID
ID
ID
A8
A7
to
X
X
X
X
(x8) Address Range
(x8) Address Range
1A000h-1BFFFh
1C000h-1FFFFh
00000h-0FFFFh
08000h-0FFFFh
10000h-1FFFFh
10000h-17FFFh
18000h-19FFFh
00000h-03FFFh
04000h-05FFFh
06000h-07FFFh
A6
L
L
L
L
A5
A2
to
X
X
X
X
A1
H
L
L
L
A0
H
H
L
L
(x16) Address Range
(x16) Address Range
DQ15
0C000h-0CFFFh
0D000h-0DFFFh
0E000h-0FFFFh
08000h-0BFFFh
08000h-0FFFFh
00000h-07FFFh
00000h-01FFFh
02000h-02FFFh
03000h-03FFFh
04000h-07FFFh
DQ8
22h
22h
to
X
X
X
X
X
(unprotected)
(protected)
DQ7
DQ0
DFh
DFh
D9h
D9h
01h
01h
00h
ID
to
. See
9