ADUC824 Analog Devices, ADUC824 Datasheet - Page 27

• Manufacturer Part Number: ADUC824
• Description: Precision Analog Microcontroller: 1MIPS 8052 MCU + 8kB Flash + 16/24-Bit ADC + 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC824

• Mcu Core: 8052
• Mcu Speed (mips): 1
• Sram (bytes): 256Bytes
• Gpio Pins: 34
• Adc # Channels: 4

ADC0CON (Primary ADC Control Register)
Used to configure the Primary ADC for range, channel selection, external Ref enable, and unipolar or bipolar coding.
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
—
Name
—
XREF0
CH1
CH0
UNI0
RN2
RN1
RN0
X
R
E
F
0
D2H
07H
No
Description
Reserved for Future Use
Primary ADC External Reference Select Bit
Set by user to enable the Primary ADC to use the external reference via REFIN(+)/REFIN(–).
Cleared by user to enable the Primary ADC to use the internal bandgap reference (V
Primary ADC Channel Selection Bits
Written by the user to select the differential input pairs used by the Primary ADC as follows:
Primary ADC Unipolar Bit.
Set by user to enable unipolar coding, i.e., zero differential input will result in 000000 hex output.
Cleared by user to enable bipolar coding, zero differential input will result in 800000 hex output.
Primary ADC Range Bits
Written by the user to select the Primary ADC input range as follows:
C
CH1
0
0
1
1
RN2
0
0
0
0
1
1
1
1
H
1
Table V. ADC0CON SFR Bit Designations
CH0
0
1
0
1
RN1
0
0
1
1
0
0
1
1
C
H
Positive Input Negative Input
AIN1
AIN3
AIN2
AIN3
RN0
0
1
0
1
0
1
0
1
0
Selected Primary ADC Input Range (V
± 20 mV
± 40 mV
± 80 mV
± 160 mV
± 320 mV
± 640 mV
± 1.28 V
± 2.56 V
U
AIN2
AIN4
AIN2 (Internal Short)
AIN2
N
0 I
R
N
2
R
REF
N
1
= 2.5 V)
ADuC824
REF
= 1.25 V).
R
N
0