10
Am29F400B
Table 2.
Am29F400BT Top Boot Block Sector Address Table
Table 3.
Am29F400BB Bottom Boot Block Sector Address Table
Note:
information.
Autoselect Mode
The autoselect mode provides manufacturer and
device 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
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). Table4 shows the remaining address bits that are don’t care.
When all necessary bits have been set as required, the
programming equipment may then read the corre-
sponding 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 5. This method
details on using the autoselect mode.
Sector
A17
A16
A15
A14
A13
A12
Sector Size
(Kbytes/ Kwords)
Address Range (in hexadecimal)
(x8)
Address Range
(x16)
Address Range
SA0
0
X
64/32
00000h–0FFFFh
00000h–07FFFh
SA1
0
1
X
64/32
10000h–1FFFFh
08000h–0FFFFh
SA2
0
1
0
X
64/32
20000h–2FFFFh
10000h–17FFFh
SA3
0
1
X
64/32
30000h–3FFFFh
18000h–1FFFFh
SA4
1
0
X
64/32
40000h–4FFFFh
20000h–27FFFh
SA5
1
0
1
X
64/32
50000h–5FFFFh
28000h–2FFFFh
SA6
1
0
X
64/32
60000h–6FFFFh
30000h–37FFFh
SA7
1
0
X
32/16
70000h–77FFFh
38000h–3BFFFh
SA8
1
0
8/4
78000h–79FFFh
3C000h–3CFFFh
SA9
1
0
1
8/4
7A000h–7BFFFh
3D000h–3DFFFh
SA10
1
X
16/8
7C000h–7FFFFh
3E000h–3FFFFh
Sector
A17
A16
A15
A14
A13
A12
Sector Size
(Kbytes/Kwords)
Address Range (in hexadecimal)
(x8)
Address Range
(x16)
Address Range
SA0
0
X
16/8
00000h–03FFFh
00000h–01FFFh
SA1
0
1
0
8/4
04000h–05FFFh
02000h–02FFFh
SA2
0
1
8/4
06000h–07FFFh
03000h–03FFFh
SA3
0
1
X
32/16
08000h–0FFFFh
04000h–07FFFh
SA4
0
1
X
64/32
10000h–1FFFFh
08000h–0FFFFh
SA5
0
1
0
X
64/32
20000h–2FFFFh
10000h–17FFFh
SA6
0
1
X
64/32
30000h–3FFFFh
18000h–1FFFFh
SA7
1
0
X
64/32
40000h–4FFFFh
20000h–27FFFh
SA8
1
0
1
X
64/32
50000h–5FFFFh
28000h–2FFFFh
SA9
1
0
X
64/32
60000h–6FFFFh
30000h–37FFFh
SA10
1
X
64/32
70000h–7FFFFh
38000h–3FFFFh