7.4 Touch

The AVR32LA32 Curiosity Nano board has a single capacitive touch button with an active shield. For details on configuration and usage, refer to the Peripheral Touch Controller (PTC) chapter in the AVR32LA32 device data sheet.

Figure 7-5.  AVR32LA32 Curiosity Nano Touch Button Block Diagram
Tip: Generate code using the capacitive touch library in MPLAB® Harmony and visualize touch sensor data in MPLAB® Data Visualizer.
Table 7-4. Capacitive Touch Button Connection
AVR32LA32 PinDescriptionDefault Connection
PF2Shield connection for improved noise immunity
  • Touch button shield
  • Edge connector (disconnected by default)
PF3Capacitive touch connection
  • Touch button sensor
  • Edge connector (disconnected by default)
Warning: Always disconnect the board from all power sources before making any hardware modifications.
By default, the touch lines are not connected to the edge connector. PF2 and PF3 can be re-purposed for other functions by soldering the corresponding pads (J112 and J113) located on the bottom of the board to connect them to the edge connector.
Important: This modification will affect the touch button’s performance and may cause it to not function as intended.
Figure 7-6. Touch I/O Line Solder Points