I/O Pin Configurations

For unused I/O pins, the default configuration should be used, as this disconnects the I/O pads from the I/O pins, reducing the leakage current. With the default configuration for an I/O pin the bit corresponding to the pin in the Data Direction (DIR) register, the Input Enable bit in the Pin Configuration y register (PINCFGy.INEN), and the Pull Enable bit in the Pin Configuration y register (PINCFGy.PULLEN) are all written to zero.