LM3S2B93 Datasheet, PDF (666/1194 Pages) Texas Instruments – Stellaris® LM3S2B93 Microcontroller

Analog-to-Digital Converter (ADC)
Register 13: ADC Control (ADCCTL), offset 0x038
This register configures the voltage reference. The voltage reference for the conversion can be the
internal 3.0-V reference or an external voltage reference in the range of 2.4 V to 3.06 V.
ADC Control (ADCCTL)
ADC0 base: 0x4003.8000
ADC1 base: 0x4003.9000
Offset 0x038
Type R/W, 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
R/W
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.
R/W
0
Voltage Reference Select
Value Description
1 The external VREFA input is the voltage reference.
0 The internal reference as the voltage reference.
666
January 20, 2012
Texas Instruments-Production Data