Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X Hoja De Datos
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DK-TM4C129X
Figure 18-9. ADC Conversion Result
0xFFF
V
IN
0xC00
0x800
0x400
VREFN
VREFP
½
(VREFP
- VREFN)
¼
(VREFP
- VREFN)
¾
(VREFP
- VREFN)
- Input Saturation
18.3.5
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
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 18-5 on page 1213). The ADC does not
support other differential pairings such as analog input 0 with analog input 3.
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 18-5 on page 1213). The ADC does not
support other differential pairings such as analog input 0 with analog input 3.
Table 18-5. Differential Sampling Pairs
Analog Inputs
Differential Pair
0 and 1
0
2 and 3
1
4 and 5
2
6 and 7
3
8 and 9
4
10 and 11
5
12 and 13
6
1213
December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller