sample time register 3
| CSPT20 | Selection sample time of channel ADC_IN20 |
| CSPT21 | Selection sample time of channel ADC_IN21 |
| CSPT22 | Selection sample time of channel ADC_IN22 |
| CSPT23 | Selection sample time of channel ADC_IN23 |
| CSPT24 | Selection sample time of channel ADC_IN24 |
| CSPT25 | Selection sample time of channel ADC_IN25 |
| CSPT26 | Selection sample time of channel ADC_IN26 |
| CSPT27 | Selection sample time of channel ADC_IN27 |