M16C30P_07 Datasheet, PDF (190/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
16. A/D Converter
A/D Control Register 1 ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
1
Symbol
Address
After Reset
ADCON1
03D7h
00000XXXb
Symbol
Address
After Reset
RW
—
Nothing is assigned.
(b0) When w rite, set to “0”. When read, its content is indeterminate.
—
—
Nothing is assigned.
(b1) When w rite, set to “0”. When read, its content is indeterminate.
—
—
Nothing is assigned.
(b2) When w rite, set to “0”. When read, its content is indeterminate.
—
8/10-Bit Mode Select Bit
0 : 8-bit mode
BITS
1 : 10-bit mode
RW
Frequency Select Bit 1
CKS1
Refer to NOTE 2 for the ADCON2 Register
RW
Vref Connect Bit ⁽²⁾
1 : Vref connected
VCUT
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 : Do not set
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 16.5 ADCON1 Register (One-shot Mode)
Rev.1.22 Mar 29, 2007 Page 174 of 291
REJ09B0179-0122