14.7.16 Voltage References System (VREF) Control
| Symbol | Description | Symbol | Description | Symbol | Description |
|---|---|---|---|---|---|
| R | Readable bit | HC | Cleared by Hardware | (Grey cell) | Unimplemented |
| W | Writable bit | HS | Set by Hardware | X | Bit is unknown at Reset |
| K | Write to clear | S | Software settable bit | — | — |
| Name: | VREF |
| Offset: | 0x40 |
| Reset: | 0x0XXX0000 |
| Property: | Write-Protected |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| CALIB[10:8] | |||||||||
| Access | R/W | R/W | R/W | ||||||
| Reset | x | x | x | ||||||
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| CALIB[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | x | x | x | x | x | x | x | x | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| Access | |||||||||
| Reset |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| BGOUTEN | TSEN | ||||||||
| Access | R/W | R/W | |||||||
| Reset | 0 | 0 |
Bits 26:16 – CALIB[10:0] Bandgap Voltage Generator Calibration
These bits are used to calibrate the output level of the bandgap voltage reference. These bits are loaded from Flash Calibration Row at start-up.
Bit 2 – BGOUTEN Bandgap Output Enable
| Value | Description |
|---|---|
| 0 | The bandgap output is not available as an ADC input channel |
| 1 | The bandgap output is routed to an ADC input channel |
Bit 1 – TSEN Temperature Sensor Enable(1)
| Value | Description |
|---|---|
| 0 | Temperature sensor is disabled |
| 1 | Temperature sensor is enabled and routed to an ADC input channel |