PON=0, CAP=0, ATUNE0=0, CSW=0, LOAD=00, MD1=0, ATUNE2=0, STRT=0, DCMODE=0, PCSEL=0, CLK=00, SDPSEL=0, TXVSEL=00, DCBACK=0, ATUNE1=0, SNZ=0, CFCON=0, POSEL=00, MD0=0, PUMPON=0, MD2=0
CTSU Control Register A
| STRT | CTSU Measurement Operation Start 0 (0): Stop measurement operation 1 (1): Start measurement operation |
| CAP | CTSU Measurement Operation Start Trigger Select 0 (0): Software trigger 1 (1): External trigger |
| SNZ | CTSU Wait State Power-Saving Enable 0 (0): Disable power-saving function during wait state 1 (1): Enable power-saving function during wait state |
| CFCON | CTSU CFC Power On Control 0 (0): CFC power off 1 (1): CFC power on |
| INIT | CTSU Control Block Initialization |
| PUMPON | CTSU Boost Circuit Control 0 (0): Boost circuit off 1 (1): Boost circuit on |
| TXVSEL | CTSU Transmission Power Supply Selection 0 (00): Selecting VCC as the power supply for the transmit pins of mutual capacitance method. 1 (01): Selecting VCC as the power supply for the transmit pins of the mutual capacitance method. In addition, noise is reduced during GPIO operation. (Recommended) 2 (10): Select VCC as the power source for the transmitter pins used as the active shield. 3 (11): Setting prohibited |
| PON | CTSU Power On Control 0 (0): Power off the CTSU 1 (1): Power on the CTSU |
| CSW | TSCAP Pin Enable 0 (0): Disable 1 (1): Enable |
| ATUNE0 | CTSU Power Supply Operating Mode Setting 0 (0): VCC ≥ 2.4 V: Normal voltage operating mode VCC < 2.4 V: Setting prohibited 1 (1): Low-voltage operating mode |
| ATUNE1 | CTSU Current Range Adjustment 0 (0): 80 µA when ATUNE2 = 0 20 µA when ATUNE2 = 1 1 (1): 40 µA when ATUNE2 = 0 160 µA when ATUNE2 = 1 |
| CLK | CTSU Operating Clock Select 0 (00): PCLKB 1 (01): PCLKB/2 (PCLKB divided by 2) 2 (10): PCLKB/4 (PCLKB divided by 4) 3 (11): PCLKB/8 (PCLKB divided by 8) |
| MD0 | CTSU Measurement Mode Select 0 0 (0): Single scan mode 1 (1): Multi-scan mode |
| MD1 | CTSU Measurement Mode Select 1 0 (0): One-time measurement (self-capacitance method) 1 (1): Two times measurement (mutual capacitance method) |
| MD2 | CTSU Measurement Mode Select 2 0 (0): Measure the switched capacitor current and the DC current 1 (1): Measure the charge transfer by CFC circuit (parallel measurement) |
| ATUNE2 | CTSU Current Range Adjustment 0 (0): 80 µA when ATUNE1 = 0 40 µA when ATUNE1 = 1 1 (1): 20 µA when ATUNE1 = 0 160 µA when ATUNE1 = 1 |
| LOAD | CTSU Load Control During Measurement 0 (00): 2.5 µA constant current load 1 (01): No load 2 (10): 20 µA constant current load and overcurrent detector disabled 3 (11): Resistance load for calibration. To set LOAD[1:0] bits to resistance load for calibration, set these bits to 10b before they are set to 11b. |
| POSEL | CTSU Non-Measured Channel Output Select 0 (00): Output low 1 (01): Hi-Z 2 (10): Setting prohibited 3 (11): Output a pulse in phase with the transmit channel |
| SDPSEL | CTSU Sensor Drive Pulse Select 0 (0): Random pulse 1 (1): Normal pulse using the sensor unit clock |
| PCSEL | CTSU Boost Circuit Clock Select 0 (0): Sensor drive pulse divided by 2 1 (1): STCLK |
| STCLK | CTSU STCLK Select |
| DCMODE | CTSU Current Measurement Mode Select 0 (0): Electrostatic capacitance measurement mode 1 (1): Current measurement mode |
| DCBACK | CTSU Current Measurement Feedback Select 0 (0): TSCAP pin is selected 1 (1): Measurement pin is selected. It is recommended in the current measurement mode. |