Renesas M16C/29 Series Hardware Manual page 251

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
0 0
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 15.1.6.2 ADCON0 to ADCON2 Registers for Simultaneous Sample Sweep Mode
Rev.1.00 Nov 01,2004
REJ09B0101-0100Z
b5 b4 b3 b2 b1 b0
Symbol
1 0
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 Fag 0 : A/D conversion disabled
ADST
CKS0 Frequency Select Bit 0
b5 b4 b3 b2 b1 b0
Symbol
1 0
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
Reserved Bit
(b7-b6)
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.
A/D conversion.
b5 b4 b3 b2 b1 b0
Symbol
0 1
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".
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Address After reset
03D6 00000XXX
16 2
Bit name
Invalid in simultaneous sample sweep mode
b4 b3
1 0 : Single sweep mode or simultaneous
sample sweep mode
Refer to Table 15.1.6.2 Trigger Select Bit
Setting in Simultaneous Sample Sweep
Mode
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 simultaneous sample sweep
mode
(Note2)
b1 b0
0 0 : AN to AN
0
0 1 : AN to AN
0
1 0 : AN to AN
0
1 1 : AN to AN
0
0 : Any mode other than 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
(Note 3)
Connect Bit REF
REF
Set to "0"
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 starting
REF REF
Address After reset
03D4 00
16 16
Bit name
Set to "1" in simultaneous sample
sweep mode
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
Refer to Table 15.1.6.2 Trigger Select Bit
Setting in Simultaneous Sample Sweep
Mode
Function RW
RW
RW
RW
RW
RW
RW
RW
RW
Function
RW
RW
(2 pins)
1
(4 pins)
3
RW
(6 pins)
5
(8 pins)
7
RW
RW
RW
RW
RW
to AN .
0 7
Function RW
RW
RW
)
i
)
3i
)
0i
RW
)
2i
RW
RW
RW
15. A/D Converter