Renesas M16C/6NM User Manual
Rev.1.10 Jul 01, 2005 page 183 of 318
REJ09B0124-0110
REJ09B0124-0110
M16C/6N Group (M16C/6NK, M16C/6NM)
15. A/D Converter
Under development
This document is under development and its contents are subject to change.
Figure 15.2 ADCON0 Register and ADCON1 Register
CH0
CH1
CH2
MD0
MD1
TRG
ADST
CKS0
RW
RW
RW
RW
RW
RW
RW
RW
SCAN0
SCAN1
MD2
BITS
VCUT
OPA0
OPA1
CKS1
Function varies
with each operation mode
with each operation mode
0 0 : One-shot mode
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0 or
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0 or
Repeat sweep mode 1
0 : Software trigger
1 : ADTRG trigger
1 : ADTRG trigger
0 : A/D conversion disabled
1 : A/D conversion started
1 : A/D conversion started
Refer to NOTE 2 for ADCON2
Register
Register
Trigger Select Bit
A/D Conversion Start Flag
Frequency Select Bit 0
Analog Input Pin Select Bit
A/D Operation Mode
Select Bit 0
Select Bit 0
A/D Control Register 0
(1)
b7
b6
b5
b4
b3
b2
b1
b0
Bit Symbol
Bit Name
Function
RW
RW
RW
RW
RW
RW
RW
RW
RW
Bit name
Function
Bit symbol
RW
Symbol
Address
After Reset
ADCON1
03D7h
00h
0 : 8-bit mode
1 : 10-bit mode
1 : 10-bit mode
0 : Any mode other than repeat
sweep mode 1
1 : Repeat sweep mode 1
0 : VREF not connected
1 : VREF connected
1 : VREF connected
Refer to NOTE 2 for ADCON2
Register
Register
Function varies
with each operation mode
with each operation mode
A/D Sweep Pin Select Bit
8/10-Bit Mode Select Bit
VREF Connect Bit
(2)
A/D Operation Mode
Select Bit 1
Select Bit 1
External Op-Amp
Connection Mode Bit
Connection Mode Bit
Frequency Select Bit 1
Function varies
with each operation mode
with each operation mode
b7
b6
b5
b4
b3
b2
b1
b0
A/D Control Register 1
(1)
Symbol
Address
After Reset
ADCON0
03D6h
00000XXXb
NOTE:
1. If the ADCON0 register is rewritten during A/D conversion, the conversion result will be indeterminate.
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
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.
b4 b3