31.5.3 Control C
| Name: | CTRLC |
| Offset: | 0x02 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| REFSEL[2:0] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 0 | 0 | ||||||
Bits 2:0 – REFSEL[2:0] Reference Selection
This bit field controls the voltage reference for the ADC. Changing to one of the internal references will require a 60 µs initialization time.
Note: An
internal reference can be used only if it is below VDD - 0.5V.
| Value | Name | Description |
|---|---|---|
| 0x0 | VDD | VDD |
| 0x1 | - | Reserved |
| 0x2 | VREFA | External Reference VREFA |
| 0x3 | - | Reserved |
| 0x4 | 1V024 | Internal reference 1.024V |
| 0x5 | 2V048 | Internal reference 2.048V |
| 0x6 | 4V096 | Internal reference 4.096V |
| 0x7 | 2V500 | Internal reference 2.500V |