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M16C/29 Group
A/D control register 0 (Note 1)
b7
b6
Note 1: If the ADCON0 register is rewritten during A/D conversion, the conversion result will be indeterminate.
A/D control register 1 (Note 1)
b7
b6
Note 1: If the ADCON1 register is rewritten during A/D conversion, the conversion result will be indeterminate.
Note 2: AN
Note 3: If the VCUT bit is reset from "0" (V
A/D control register 2 (Note 1)
b7
b6
Note 1: If the ADCON2 register is rewritten during A/D conversion, the conversion result will be indeterminate.
Figure 15.1.5.2 ADCON0 to ADCON2 Registers in Repeat Sweep Mode 1
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
b5
b4
b3
b2
b1
b0
Symbol
1
1
ADCON0
Bit symbol
Analog Input Pin
CH0
Select Bit
CH1
CH2
MD0
A/D Operation Mode
Select Bit 0
MD1
Trigger Select Bit
TRG
A/D Conversion Start
ADST
Flag
CKS0
Frequency Select Bit 0
b5
b4
b3
b2
b1
b0
Symbol
1
1
ADCON1
Bit symbol
A/D Sweep Pin
SCAN0
Select Bit
SCAN1
A/D Operation Mode
MD2
Select Bit 1
8/10-Bit Mode Select Bit
BITS
CKS1
Frequency Select Bit 1
VCUT
V
REF
Nothing is assigned. When write, set to "0".
(b7-b6)
When read, its content is "0".
to AN
, AN
to AN
, and AN
00
07
20
27
Use the ADGSEL1 to ADGSEL0 bits in the ADCON2 register to select the desired pin.
REF
starting A/D conversion.
b5
b4
b3
b2
b1
b0
Symbol
0
0
ADCON2
Bit symbol
A/D Conversion Method
SMP
Select Bit
ADGSEL0
A/D Input Group
Select Bit
ADGSEL1
Reserved Bit
(b3)
Frequency Select Bit 2
CKS2
Trigger Select Bit 1
TRG1
Nothing is assigned. When write, set to "0".
(b7-b6)
When read, its content is "0".
page 229 of 402
Address
After reset
03D6
00000XXX
16
2
Bit name
Invalid in repeat sweep mode 1
b4 b3
1 1 : Repeat sweep mode 0 or
Repeat sweep mode 1
0 : Software trigger
1 : Hardware trigger (AD
0 : A/D conversion disabled
1 : A/D conversion started
Refer to Table 15.2 A/D Conversion
Frequency Select
Address
After reset
03D7
00
16
16
Bit name
When selecting repeat sweep mode 1
(Note2)
b1 b0
0 0 : AN
(1 pin)
0
0 1 : AN
to AN
(2 pins)
0
1
1 0 : AN
to AN
(3 pins)
0
2
1 1 : AN
to AN
(4 pins)
0
3
1 : Repeat sweep mode 1
0 : 8-bit mode
1 : 10-bit mode
Refer to Table 15.2 A/D Conversion
Frequency Select
1 : V
connected
Connect Bit
(Note 3)
REF
to AN
can be used in the same way as AN
30
32
unconnected) to "1" (V
connected), wait for 1 µs or more before
REF
Address
After reset
03D4
00
16
16
Bit name
Function
0 : Without sample and hold
1 : With sample and hold
b2 b1
0 0 : Select port P10 group (AN
0 1 : Select port P9 group (AN
1 0 : Select port P0 group (AN
1 1 : Select port P1/P9 group (AN
"0"
Set to
Refer to Table 15.2 A/D Conversion
Frequency Select
Set to "0" in repeat sweep mode 1
15. A/D Converter
Function
RW
RW
RW
RW
RW
RW
trigger)
RW
TRG
RW
RW
Function
RW
RW
RW
RW
RW
RW
RW
to AN
.
0
7
RW
RW
RW
)
i
)
3i
)
0i
RW
)
2i
RW
RW
RW
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