ADUC847_15 Datasheet, PDF (43/108 Pages) Analog Devices – 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU

Data Sheet
ADuC845/ADuC847/ADuC848
ADC0CON1 (PRIMARY ADC CONTROL REGISTER)
ADC0CON1 is used to configure the primary ADC for buffer, unipolar, or bipolar coding, and ADC range configuration.
SFR Address:
D2H
Power-On Default: 07H
Bit Addressable:
No
Table 25. ADC0CON1 SFR Bit Designations
Bit No. Name
Description
7, 6
BUF1, BUF0
Buffer Configuration Bits.
BUF1 BUF0
Buffer Configuration
0
0
ADC0+ and ADC0− are buffered
0
1
Reserved
1
0
Buffer Bypass
1
1
Reserved
5
UNI
Primary ADC Unipolar Bit.
Set by the user to enable unipolar coding; zero differential input results in 000000H output.
Cleared by the user to enable bipolar coding; zero differential input results in 800000H output.
4
–––
Not Implemented. Write Don’t Care.
3
–––
Not Implemented. Write Don’t Care.
2, 1, 0
RN2, RN1, RN0 Primary ADC Range Bits. Written by the user to select the primary ADC input range as follows:
RN2 RN1
RN0
Selected primary ADC input range (VREF = 2.5 V)
0
0
0
±20 mV (0 mV–20 mV in unipolar mode)
0
0
1
±40 mV (0 mV–40 mV in unipolar mode)
0
1
0
±80 mV (0 mV–80 mV in unipolar mode)
0
1
1
±160 mV (0 mV–160 mV in unipolar mode)
1
0
0
±320 mV (0 mV–320 mV in unipolar mode)
1
0
1
±640 mV (0 mV–640 mV in unipolar mode)
1
1
0
±1.28 V (0 V–1.28 V in unipolar mode)
1
1
1
±2.56 V (0 V–2.56 V in unipolar mode)
Rev. C | Page 43 of 108