4.2.3 Touch Button
The PIC32CM LS00 Curiosity Nano+ Touch Evaluation Kit has one QTouch button with a driven shield. The QTouch button is implemented using the built-in Peripheral Touch Controller (PTC) of the MCU.
These PTC I/O lines are accessible through the edge connector and can be repurposed to GPIO. For this, users need to desolder the R20 and R34, and then populate the R35 and R36.
| PIC32CM5164LS00048 Pin | Function | Shared Functionality |
|---|---|---|
| PA22 | QTouch Button | GPIO4 (Pin 27 on the Edge Connector) |
| PA21 | QTouch Button Shield | GPIO5 (Pin 28 on the Edge Connector) |
Note: The touch button on the board is to showcase touch capability
only and is not intended for performance evaluation. To evaluate the performance, use
the Curiosity Nano Touch Adapter board (AC80T88A) with one of the Touch Extension boards or design your PCBs by
referring to the “Capacitive Touch Sensor Design Guide” (DS00002934).