A-D CONVERTER
12.11 Repeat sweep mode 1
A-D control registers 0, 1, and 2
b7
b0
A-D control register 0
(Address 1E16
0
0
1 1 ✕ ✕
✕
)
Repeat sweep mode 1
A-D conversion start bit
0 : A-D conversion halts.
A-D conversion frequency (φAD) select bit 0
See Table 12.2.1.
b7
b0
A-D control register 1
0
0
1
(Address 1F16
)
A-D sweep pin select bits
b1b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0
0
0
0
(1 pin)
and AN
1
(2 pins)
(3 pins)
(4 pins)
to AN
2
to AN
3
Repeat sweep mode 1
Resolution select bit
0 : 8-bit resolution mode
1 : 10-bit resolution mode
A-D conversion frequency (φAD) select bit 1
See Table 12.2.1.
VREF connection select bit
0 : Pin VREF connected
b7
b0
A-D control register 2
(Address DB16
0
0
0
0 0
✕
✕
✕
)
Analog input pin select bits 1
b3 b2 b1 b0
0
X X X : AN0 to AN7 selected
✕ : It may be either “0” or “1.”
Selection of comparator function
b7
b0
Comparator function select register 0
(Address DC16
)
AN
0
1
2
3
4
5
6
7
0 : Comparator function is not selected.
1 : Comparator function is selected.
AN
AN
AN
AN
AN
AN
AN
Continued on Figure 12.11.3.
Fig. 12.11.2 Initial setting example for related registers in repeat sweep mode 1 (1)
7905 Group User’s Manual Rev.1.0
12-37
RENESAS [ RENESAS TECHNOLOGY CORP ]
