Am29LV004
9
PR EL I M I NAR Y
Table 2.
Am29LV004T Top Boot Block Sector Address Table
Table 3.
Am29LV004B Bottom Boot Block Sector Address Table
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 VID (11.5 V to 12.5 V) on address pin A9.
Address pins A6, A1, and A0 must be as shown in
Table4. In addition, when verifying sector protection, the sec-
tor address must appear on the appropriate highest
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 iden-
tifier 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 5. This method
details on using the autoselect mode.
Sector
A18
A17
A16
A15
A14
A13
Sector Size
(Kbytes)
Address Range
(in hexadecimal)
SA0
0
X
64
00000h-0FFFFh
SA1
0
1
X
64
10000h-1FFFFh
SA2
0
1
0
X
64
20000h-2FFFFh
SA3
0
1
X
64
30000h-3FFFFh
SA4
1
0
X
64
40000h-4FFFFh
SA5
1
0
1
X
64
50000h-5FFFFh
SA6
1
0
X
64
60000h-6FFFFh
SA7
1
0
X
32
70000h-77FFFh
SA8
1
0
8
78000h-79FFFh
SA9
1
0
1
8
7A000h-7BFFFh
SA10
1
X
16
7C000h-7FFFFh
Sector
A18
A17
A16
A15
A14
A13
Sector Size
(Kbytes)
Address Range
(in hexadecimal)
SA0
0
X
16
00000h-03FFFh
SA1
0
1
0
8
04000h-05FFFh
SA2
0
1
8
06000h-07FFFh
SA3
0
1
X
32
08000h-0FFFFh
SA4
0
1
X
64
10000h-1FFFFh
SA5
0
1
0
X
64
20000h-2FFFFh
SA6
0
1
X
64
30000h-3FFFFh
SA7
1
0
X
64
40000h-4FFFFh
SA8
1
0
1
X
64
50000h-5FFFFh
SA9
1
0
X
64
60000h-6FFFFh
SA10
1
X
64
70000h-7FFFFh