ADUC847BCP8-5 AD [Analog Devices], ADUC847BCP8-5 Datasheet - Page 44

• Manufacturer Part Number: ADUC847BCP8-5
• Description: MicroConverter Multichannel 24-/16-Bit ADCs with Embedded 62 kB Flash and Single-Cycle MCU
• Manufacturer: AD [Analog Devices]

ADuC845/ADuC847/ADuC848
ADC0CON2 (PRIMARY ADC CHANNEL SELECT REGISTER)
ADC0CON2 is used to select a reference source and channel for the primary ADC.
SFR Address:
Power-On Default:
Bit Addressable:
Table 26. ADC0CON2 SFR Bit Designations
Bit No.
7, 6
5
4
3, 2, 1, 0
Note that because the reference-detect does not operate on the REFIN2± pair, the REFIN2± pins can go below 1 V.
Name
XREF1, XREF0
–––
–––
CH3, CH2, CH1, CH0
E6H
00H
No
Description
Primary ADC External Reference Select Bit.
Set by the user to enable the primary ADC to use the external reference via REFIN± or REFIN2±.
Cleared by the user to enable the primary ADC to use the internal band gap reference (V
XREF1
0
0
1
1
Not Implemented. Write Don’t Care.
Not Implemented. Write Don’t Care.
Primary ADC Channel Select Bits. Written by the user to select the primary ADC channel as follows:
CH3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CH2
0
1
0
0
0
0
1
1
1
1
0
0
0
1
1
1
XREF0
0
1
0
1
CH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Internal 1.25 V Reference.
REFIN± Selected.
REFIN2± (AIN3/AIN4) Selected.
Reserved.
CH0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Rev. A | Page 44 of 108
Selected Primary ADC Input Channel.
AIN1–AINCOM
AIN2–AINCOM
AIN3–AINCOM
AIN4–AINCOM
AIN5–AINCOM
AIN6–AINCOM
AIN7–AINCOM
AIN8–AINCOM
AIN9–AINCOM (CSP package only; not a valid selection on the MQFP package)
AIN10–AINCOM (CSP package only; not a valid selection on the MQFP package)
AIN1–AIN2
AIN3–AIN4
AIN5–AIN6
AIN7–AIN8
AIN9–AIN10 (CSP package only; not a valid selection on the MQFP package)
AINCOM–AINCOM
REF
= 1.25 V).