M16C62P_06 Datasheet, PDF (254/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
18. A/D Converter
A/D Control Register 0 ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
Address
After Reset
ADCON0
03D6h
00000XXXb
Bit Symbol
Bit Name
Function
RW
Analog Input Pin Select Bit ^{(2, 3)} b2 b1 b0
CH0
0 0 0 : AN0 is selected
RW
0 0 1 : AN1 is selected
0 1 0 : AN2 is selected
CH1
0 1 1 : AN3 is selected
RW
1 0 0 : AN4 is selected
1 0 1 : AN5 is selected
1 1 0 : AN6 is selected
CH2
1 1 1 : AN7 is selected
RW
MD0
MD1
TRG
ADST
CKS0
A/D Operation Mode Select
Bit 0 ⁽³⁾
Trigger Select Bit
A/D Conversion Start Flag
Frequency Select Bit 0
b4 b3
RW
0 0 : One-shot mode
RW
0 : Softw are trigger
_________
RW
1 : ADTRG trigger
0 : A/D conversion disabled
1 : A/D conversion started
RW
Refer to NOTE 3 for the ADCON2 Register
RW
NOTES :
1. If the ADCON0 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. After rew riting the MD1 to MD0 bits, set the CH2 to CH0 bits over again using another instruction.
A/D Control Register 1 ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
1
0
Symbol
Address
After Reset
ADCON1
03D7h
00h
Symbol
Address
After Reset
RW
SCAN0 A/D Sw eep Pin Select Bit
Invalid in one-shot mode
RW
SCAN1
RW
A/D Operation Mode Select Bit 1 Set to “0” w hen one-shot mode is selected
MD2
RW
8/10-Bit Mode Select Bit
0 : 8-bit mode
BITS
1 : 10-bit mode
RW
CKS1
VCUT
Frequency Select Bit 1
Vref Connect Bit ⁽²⁾
Refer to NOTE 3 for the ADCON2 Register RW
1 : Vref connected
RW
External Op-Amp Connection b7 b6
OPA0 _{Mode Bit}
0 0 : ANEX0 and ANEX1 are not used
RW
0 1 : ANEX0 input is A/D converted
OPA1
1 0 : ANEX1 input is A/D converted
RW
1 1 : External op-amp connection mode
NOTES :
1. If the ADCON1 register is rew ritten during A/D conversion, the conversion result w ill be indeterminate.
2. 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 18.5 ADCON0 and ADCON1 Registers (One-shot Mode)
Rev.2.41 Jan 10, 2006 Page 239 of 390
REJ09B0185-0241