Renesas M16C/62P Hardware Manual page 226

M16C/62P Group (M16C/62P, M16C/62PT)
A/D Control Register 0
b7 b6 b5 b4 b3 b2
0 0
NOTES:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be indeterminate.
2. AN0_0 to AN0_7, and AN2_0 to AN2_7 can be used in the same way as AN0 to AN7. Use the ADGSEL1 to
ADGSEL0 bits in the ADCON2 register to select the desired pin. However, if VCC2 < VCC1, do not use AN0_0 to
AN0_7 and AN2_0 to AN2_7 as analog input pins.
3. After rewriting the MD1 to MD0 bits, set the CH2 to CH0 bits over again using another instruction.
A/D Control Register 1
b7 b6 b5 b4 b3 b2
1 0
NOTES:
1. If the ADCON1 register is rewritten during A/D conversion, the conversion result will be indeterminate.
2. 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.
Figure 18.4 ADCON0 Register and ADCON1 Register (One-shot Mode)
R e . v 2 3 . 0 S e p 0 , 1 2 0 0 4
R E J 0 9 B 0 1 8 5 0 - 2 3 0 Z
(1)
b1 b0
Symbol
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
ADST
Start Flag
CKS0
Frequency Select Bit 0
(1)
b1 b0
Symbol
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 0 : 8-bit mode
BITS
CKS1
Frequency Select Bit 1
Vref Connect Bit
VCUT
External Op-Amp
OPA0
Connection Mode Bit
OPA1
page 212
f o 3 6 4
Address After Reset
03D6h 00000XXXb
Bit Name
b2 b1 b0
0 0 0 : AN0 is selected
0 0 1 : AN1 is selected
0 1 0 : AN2 is selected
0 1 1 : AN3 is selected
1 0 0 : AN4 is selected
1 0 1 : AN5 is selected
1 1 0 : AN6 is selected
1 1 1 : AN7 is selected
b4 b3
0 0 : One-shot mode
0 : Software trigger
1 : ADTRG trigger
0 : A/D conversion disabled
1 : A/D conversion started
Refer to NOTE 3 for the ADCON2 Register
Address After Reset
03D7h 00h
Bit Name
Invalid in one-shot mode
Set to "0" when one-shot mode is selected
1 : 10-bit mode
Refer to NOTE 3 for the ADCON2 Register
(2)
1 : Vref connected
b7 b6
0 0 : ANEX0 and ANEX1 are not used
0 1 : ANEX0 input is A/D converted
1 0 : ANEX1 input is A/D converted
1 1 : External op-amp connection mode
18. A/D Converter
Function
(2)
(3)
(3)
Function
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW