OPAMP1 control/status register
| OPAEN | Operational amplifier Enable |
| FORCE_VP | Force internal reference on VP (reserved for test |
| VP_SEL | Operational amplifier PGA mode |
| VM_SEL | Inverting input selection |
| OPAHSM | Operational amplifier high-speed mode |
| CALON | Calibration mode enabled |
| CALSEL | Calibration selection |
| PGA_GAIN | allows to switch from AOP offset trimmed values to AOP offset |
| USERTRIM | User trimming enable |
| TSTREF | OPAMP calibration reference voltage output control (reserved for test) |
| CALOUT | Operational amplifier calibration output |