CALON=B_0x0, VP_SEL=B_0x0, CALSEL=B_0x0, VM_SEL=B_0x0, USERTRIM=B_0x0, OPALPM=B_0x0, PGA_GAIN=B_0x0, OPA_RANGE=B_0x0, OPAMODE=B_0x0, OPAEN=B_0x0
OPAMP control/status register
| OPAEN | Operational amplifier Enable 0 (B_0x0): operational amplifier disabled 1 (B_0x1): operational amplifier enabled |
| OPALPM | Operational amplifier Low Power Mode The operational amplifier must be disable to change this configuration. 0 (B_0x0): operational amplifier in normal mode 1 (B_0x1): operational amplifier in low-power mode |
| OPAMODE | Operational amplifier PGA mode 0 (B_0x0): internal PGA disable 1 (B_0x1): internal PGA disable 2 (B_0x2): internal PGA enable, gain programmed in PGA_GAIN 3 (B_0x3): internal follower |
| PGA_GAIN | Operational amplifier Programmable amplifier gain value 0 (B_0x0): internal PGA Gain 2 1 (B_0x1): internal PGA Gain 4 2 (B_0x2): internal PGA Gain 8 3 (B_0x3): internal PGA Gain 16 |
| VM_SEL | Inverting input selection These bits are used only when OPAMODE = 00, 01 or 10. 1x: Inverting input not externally connected. These configurations are valid only when OPAMODE = 10 (PGA mode) 0 (B_0x0): GPIO connected to VINM (valid also in PGA mode for filtering) |
| VP_SEL | Non inverted input selection 0 (B_0x0): GPIO connected to VINP 1 (B_0x1): DAC connected to VINP |
| CALON | Calibration mode enabled 0 (B_0x0): Normal mode 1 (B_0x1): Calibration mode (all switches opened by HW) |
| CALSEL | Calibration selection 0 (B_0x0): NMOS calibration (200mV applied on OPAMP inputs) 1 (B_0x1): PMOS calibration (VDDA-200mV applied on OPAMP inputs) |
| USERTRIM | allows to switch from factory AOP offset trimmed values to AOP offset user trimmed values This bit is active for both mode normal and low-power. 0 (B_0x0): factory trim code used 1 (B_0x1): user trim code used |
| CALOUT | Operational amplifier calibration output During calibration mode offset is trimmed when this signal toggle. |
| OPA_RANGE | Operational amplifier power supply range for stability All AOP must be in power down to allow AOP-RANGE bit write. It applies to all AOP embedded in the product. 0 (B_0x0): Low range (VDDA < 2.4V) 1 (B_0x1): High range (VDDA > 2.4V) |