TM4C1297NCZAD Datasheet, PDF (1106/1750 Pages) Texas Instruments – Tiva Microcontroller

Analog-to-Digital Converter (ADC)
Register 14: ADC Control (ADCCTL), offset 0x038
This register configures the voltage reference. The voltage references for the conversion can be
VREFA+ and VREFA- or VDDA and GNDA. Note that values set in this register apply to all ADC
modules, it is not possible to set one module to use internal references and another to use external
references.
ADC Control (ADCCTL)
ADC0 base: 0x4003.8000
ADC1 base: 0x4003.9000
Offset 0x038
Type RW, reset 0x0000.0000
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
VREF
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RW
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit/Field
31:1
0
Name
reserved
VREF
Type
Reset Description
RO 0x0000.000 Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
RW
0x0
Voltage Reference Select
Value Description
0x0 VDDA and GNDA are the voltage references for all ADC modules.
0x1 The external VREFA+ and VREFA- inputs are the voltage
references for all ADC modules.
1106
Texas Instruments-Production Data
June 18, 2014