C868_02 Datasheet, PDF (159/244 Pages) Infineon Technologies AG – 8 - Bit CMOS Microcontroller

C868
On-Chip Peripheral Components
4.10.1 Register Definition of the ADC
The ADCON0 and ADCON1 registers are used to configure and control the ADC. It also
indicates the status of the ADC functions (flags).
ADCON0
A/D Converter Control Register 0
[Reset value: 0000X000_B]
7
6
5
4
3
2
1
0
ADST ADBSY
ADM
-
rw
rh
rw
r
ADCH
rw
Field
ADCH
ADM
ADBSY
ADST
-
Bits Typ Description
[2:0] rw Analog Input Selection.
The number of bits implemented depends on the
actual number of channels required for the product.
Bit 0 of the register shall be the least significant bit.
[5:4] rw ADC Mode Selection.
00 : Single Conversion on Fixed Channel (default)
01 : Continuous Conversion on Fixed Channel
10 : Reserved
11 : Reserved
Bit 4 is used for mode selection while bit 5 is
reserved.
6
rh ADC Busy Flag
1 : Conversion is in progress.
7
rw A/D Conversion Start Bit.
Set by user to begin a conversion. Cleared by
hardware at the beginning of conversion. For
continuous conversion, this bit is cleared at the
beginning of first conversion.
3
r reserved;
returns ’0’ if read; should be written with ’0’;
User’s Manual
4-115
V 0.4, 2002-01