TM4C1233H6PM Datasheet, PDF (785/1215 Pages) Texas Instruments – Tiva Microcontroller

Figure 13-9. ADC Conversion Result
0xFFF
0xC00
0x800
0x400
Tiva^™ TM4C1233H6PM Microcontroller
VREFN
- ^VREFN)
(VREFP
¼
- ^VREFN)
(VREFP
½
- ^VREFN)
(VREFP
¾
VREFP
V_IN
- Input Saturation
13.3.5
Differential Sampling
In addition to traditional single-ended sampling, the ADC module supports differential sampling of
two analog input channels. To enable differential sampling, software must set the Dn bit in the
ADCSSCTL0n register in a step's configuration nibble.
When a sequence step is configured for differential sampling, the input pair to sample must be
configured in the ADCSSMUXn register. Differential pair 0 samples analog inputs 0 and 1; differential
pair 1 samples analog inputs 2 and 3; and so on (see Table 13-3 on page 785). The ADC does not
support other differential pairings such as analog input 0 with analog input 3.
Table 13-3. Differential Sampling Pairs
Differential Pair
0
1
2
3
4
5
Analog Inputs
0 and 1
2 and 3
4 and 5
6 and 7
8 and 9
10 and 11
June 12, 2014
785
Texas Instruments-Production Data