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Analog-to-digital converter<br />
<strong>STM32W108C8</strong><br />
11.1.6 ADC configuration register<br />
The ADC configuration register (ADC_CFG) sets up most of the ADC operating parameters.<br />
Input<br />
The analog input of the ADC can be chosen from various sources. The analog input is<br />
configured with the ADC_MUXP and ADC_MUXN bits within the ADC_CFG register.<br />
Table 107 shows the possible input selections.<br />
Table 107.<br />
ADC_MUXn (1)<br />
ADC inputs<br />
1. Denotes bits ADC_MUXP or ADC_MUXN in register ADC_CFG.<br />
Table 108 shows the typical configurations of ADC inputs.<br />
Table 108.<br />
Analog source at ADC GPIO pin Purpose<br />
0 ADC0 PB5<br />
1 ADC1 PB6<br />
2 ADC2 PB7<br />
3 ADC3 PC0<br />
4 ADC4 PA4<br />
5 ADC5 PA5<br />
6 No connection<br />
7 No connection<br />
8 GND Internal connection Calibration<br />
9 VREF/2 Internal connection Calibration<br />
10 VREF Internal connection Calibration<br />
11 1V8 VREG/2 Internal connection Supply monitoring and calibration<br />
12 No connection<br />
13 No connection<br />
14 No connection<br />
15 No connection<br />
Typical ADC input configurations<br />
ADC P input ADC N input ADC_MUXP ADC_MUXN Purpose<br />
ADC0 VREF/2 0 9 Single-ended<br />
ADC1 VREF/2 1 9 Single-ended<br />
ADC2 VREF/2 2 9 Single-ended<br />
ADC3 VREF/2 3 9 Single-ended<br />
ADC4 VREF/2 4 9 Single-ended<br />
ADC5 VREF/2 5 9 Single-ended<br />
ADC1 ADC0 1 0 Differential<br />
ADC3 ADC2 3 2 Differential<br />
163/215 Doc ID 018587 Rev 2
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