ADC Config Register 2.
| VREFM | Trimming code for VREFM output of reference buffer. |
| VREFP | Trimming code for VREFP output of reference buffer. |
| IDRV | Trimming code for reference buffer drive strength. |
| VCM | Trimming code for VCM output of reference buffer. |
| D_IBOOST | Trimming value for extra drive current in reference buffer outputs |