PIC32MX1XX/2XX/5XX 64/100-PIN FAMILY
2.8 Unused I/Os
Unused I/O pins should not be allowed to float as
inputs. They can be configured as outputs and driven
to a logic-low state.
Alternatively, inputs can be reserved by connecting the
pin to VSS through a 1k to 10k resistor and configuring
the pin as an input.
2014-2017 Microchip Technology Inc.
DS60001290E-page 29