m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 343

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

are performed repeatedly. The A-D conversion is performed in ascending sequence from pin AN
address 1E
operation while the A-D conversion start bit = “1.”
A-D CONVERTER
12.10 Repeat sweep mode 0
12.10 Repeat sweep mode 0
In the repeat sweep mode, the A-D conversions for input voltages from multiple selected analog input pins
In this mode, no A-D conversion interrupt request occurs. Additionally, the A-D conversion start bit (bit 6 at
This mode can be used with analog input pins AN
12-32
Fig. 12.10.1 Initial setting example for related registers in repeat sweep mode 0 (1)
12.10.1 Settings for repeat sweep mode 0
Figures 12.10.1 and 12.10.2 show initial setting examples for related registers in the repeat sweep mode 0.
16
) remains set to “1” until it is cleared to “0” by software, and the A-D converter repeats its
Selection of comparator function
b7
A-D control registers 0, 1, and 2
b7
b7
b7
0
0
0
0
0
0
0
0 0
1 1
7905 Group User’s Manual Rev.1.0
Continued on Figure 12.10.2.
0
b0
b0
b0
b0
AN
AN
AN
AN
AN
AN
AN
AN
A-D conversion frequency (
Repeat sweep mode 0
A-D conversion start bit
Comparator function select register 0
(Address DC
0
1
2
3
4
5
6
7
A-D control register 2
(Address DB
A-D control register 1
(Address 1F
0 : A-D conversion halts.
See Table 12.2.1.
Analog input pin select bits 1
A-D control register 0
(Address 1E
A-D sweep pin select bits
A-D conversion frequency (
V
Repeat sweep mode 0
Resolution select bit
b3
j
REF
See Table 12.2.1.
0 X X X : AN
b1 b0
0 0 : AN
0 1 : AN
1 0 : AN
1 1 : AN
0 : 8-bit resolution mode
1 : 10-bit resolution mode
0 : Pin V
0 : Comparator function is not selected.
1 : Comparator function is selected.
(j = 0 to 7).
b2
connection select bit
b1 b0
0
0
0
0
REF
, AN
to AN
to AN
to AN
16
16
16
16
0
)
)
)
connected
to AN
)
1
3
5
7
: It may be either “0” or “1.”
(4 pins)
(6 pins)
(8 pins)
(2 pins)
7
selected
AD
) select bit 0
AD
) select bit 1
0
to pin AN
7
.