Renesas M16C/29 Series User Manual

15. A/D Converter
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page 237
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Figure 15.15 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 1
A/D Control Register 0
(1)
Symbol Address After Reset
ADCON0 03D6
16 00000XXX 2
b7 b6 b5 b4 b3 b2 b1 b0
Analog input pin select bit
CH0
Bit Symbol Bit Name Function
CH1
CH2
A/D operation mode
select bit 0
MD0
MD1
Trigger select bit
0: Software trigger
1: Hardware trigger (AD
TRG trigger)
TRG
ADST
A/D conversion start flag
0: A/D conversion disabled
1: A/D conversion started
Frequency select bit 0
See Table 15.2
CKS0
RW
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be undefined.
RW
RW
RW
RW
RW
RW
RW
RW
Invalid in repeat sweep mode 1
b4 b3
1 1: Repeat sweep mode 0 or
repeat sweep mode 1
A/D Control Register 1
(1)
Symbol Address After Reset
ADCON1 03D7
16 00 16
Bit Name Function
Bit Symbol
b7 b6 b5 b4 b3 b2 b1 b0
A/D sweep pin select bit
(2)
SCAN0
SCAN1
MD2
BITS 8/10-bit mode select bit
0: 8-bit mode
1: 10-bit mode
VCUT
A/D operation mode
select bit 1
1: Repeat sweep mode 1
1: Vref connected
Frequency select bit 1CKS1
RW
RW
RW
RW
RW
RW
RW
See Table 15.2
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
(b7-b6)
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be undefined.
2.
AN00 to AN07, AN20 to AN27, and AN30 to AN32 can be used in the same way as AN0 to AN7. Use bits ADGSEL1
and ADGSEL 0 in the ADCON2 register to select the desired pin.
3. If the VCUT bit is reset from 0 (Vref unconnected) to 1 (Vref connected), wait for 1 µs or more before starting A/D
conversion.
Vref connect Bit
(3)
A/D Control Register 2
(1)
Symbol Address After Reset
ADCON2 03D4
16 00 16
Bit Name FunctionBit Symbol
b7 b6 b5 b4 b3 b2 b1 b0
A/D conversion method
select bit
SMP
Reserved bit Set to 0
TRG1
A/D input group select bit
b2 b1
0 0: Select port P10 group
0 1: Select port P9 group
1 0: Select port P0 group
1 1: Select port P1/P9 group
Set to 0 in repeat sweep mode 1
Frequency select bit 2CKS2
RW
RW
RW
RW
RW
RW
RW
0: Without sample and hold
1: With sample and hold
See Table 15.2
Nothing is assigned. If necessary, set to 0.
When read, the content is 0
(b7-b6)
NOTE:
1. If the ADCON2 register is rewritten during A/D conversion, the conversion result will be undefined.
Trigger select bit
ADGSEL0
ADGSEL1
(b3)
11
10
When repeat sweep mode 0 is selected,
b1 b0
0 0: AN 0 (1 pin)
0 1: AN
0 to AN 1 (2 pins)
1 0: AN
0 to AN 2 (3 pins)
1 1: AN
0 to AN 3 (4 pins)
0 0

Renesas M16C/29 Series Specifications

General

Brand	Renesas
Model	M16C/29 Series
Category	Microcontrollers
Language	English