20.5.2 Analog Comparator Reference
| Name: | ACREF |
| Offset: | 0x04 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| ALWAYSON | REFSEL[2:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | |||||
| Reset | 0 | 0 | 0 | 0 | |||||
Bit 7 – ALWAYSON Reference Always On
| Value | Description |
|---|---|
| 0 | The reference is automatically enabled when needed |
| 1 | The reference is always on |
Bits 2:0 – REFSEL[2:0] Reference Select
This bit field controls the reference voltage level for ACs.
Note:
- The values given for internal references are only typical. Refer to the Electrical Characteristics section for further details.
| Value | Name | Description |
|---|---|---|
| 0x0 | 1V024 | Internal 1.024V reference(1) |
| 0x1 | 2V048 | Internal 2.048V reference(1) |
| 0x2 | 4V096 | Internal 4.096V reference(1) |
| 0x3 | 2V500 | Internal 2.500V reference(1) |
| 0x4 | - | Reserved |
| 0x5 | VDD | VDD as reference |
| 0x6 | VREFA | External reference from the VREFA pin |
| 0x7 | - | Reserved |