47.8.2 Control B
| Name: | CTRLB |
| Offset: | 0x01 |
| Reset: | 0x02 |
| Property: | PAC Write-Protection |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| REFSEL[1:0] | DIFF | ||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | 0 | 1 | 0 | ||||||
Bits 2:1 – REFSEL[1:0] Reference Selection
This bit field selects the Reference Voltage for both DACs.
| Value | Name | Description |
|---|---|---|
| 0x0 | VREFAU | Unbuffered external voltage reference (not buffered in DAC, direct connection) |
| 0x1 | VDDANA | Voltage supply |
| 0x2 | VREFAB | Buffered external voltage reference (buffered in DAC). This buffered external voltage reference option can be used when the applied external input reference voltage has insufficient drive current. |
| 0x3 | INTREF | Internal bandgap reference |
Bit 0 – DIFF Differential Mode Enable
This bit defines the conversion mode for both DACs.
| Value | Description |
|---|---|
| 0 | Single mode |
| 1 | Differential mode |