Renesas M16C/62P Series Hardware Manual page 258

M16C/62P Group (M16C/62P, M16C/62PT)
A/D Control Register 0
b7 b6 b5 b4 b3 b2 b1 b0
1 0
NOTES :
1. If the ADCON0 register is rew ritten during A/D conversion, the conversion result w ill be indeterminate.
A/D Control Register 1
b7 b6 b5 b4 b3 b2 b1 b0
1 0
NOTES :
1. If the ADCON1 register is rew ritten during A/D conversion, the conversion result w ill be indeterminate.
2. AN0_0 to AN0_7, and AN2_0 to AN2_7 can be used in the same w ay as AN0 to AN7. Use the ADGSEL1 to
ADGSEL0 bits in the ADCON2 register to select the desired pin. How ever, if VCC2 < VCC1, do not use AN0_0 to
AN0_7 and AN2_0 to AN2_7 as analog input pins.
3. If the VCUT bit is reset from "0" (Vref unconnected) to "1" (Vref connected), w ait for 1 µs or more before starting
A/D conversion.
Figure 18.7 ADCON0 Register and ADCON1 Register (Single Sweep Mode)
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
(1)
Symbol Address
03D6h
ADCON0
Bit Symbol Bit Name
CH0 Analog Input Pin Select Bit
CH1
CH2
MD0 A/D Operation Mode Select
Bit 0
MD1
Trigger Select Bit
TRG
A/D Conversion Start Flag
ADST
Frequency Select Bit 0
CKS0
(1)
Symbol Address
03D7h
ADCON1
Symbol Address
A/D Sw eep Pin Select Bit
SCAN0
SCAN1
A/D Operation Mode Select Bit 1 Set to "0" w hen single sw eep mode is selected
MD2
8/10-Bit Mode Select Bit
BITS
CKS1 Frequency Select Bit 1
Vref Connect Bit
VCUT
External Op-Amp Connection
OPA0
Mode Bit
OPA1
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Invalid in single sw eep mode
b4 b3
1 0 : Single sw eep mode
0 : Softw are trigger
_________
1 : ADTRG trigger
0 : A/D conversion disabled
1 : A/D conversion started
Refer to NOTE 3 for the ADCON2 Register
(2)
When single sw eep mode is selected
b1 b0
0 0 : AN0 to AN1 (2 pins)
0 1 : AN0 to AN3 (4 pins)
1 0 : AN0 to AN5 (6 pins)
1 1 : AN0 to AN7 (8 pins)
0 : 8-bit mode
1 : 10-bit mode
Refer to NOTE 3 for the ADCON2 Register
(3)
1 : Vref connected
b7 b6
0 0 : ANEX0 and ANEX1 are not used
0 1 : Do not set to this value
1 0 : Do not set to this value
1 1 : External op-amp connection mode
18. A/D Converter
After Reset
00000XXXb
Function
After Reset
00h
After Reset
010-62245566 13810019655
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW