9 Appendix C – Pin Assignments

Physical PinPin NameApplication Use
1VDD+5V Input
2RA5Fan Tachometer Input 1
3RA4Fan Tachometer Input 2
4MCLR/VPP/RA3MCLR and Reset
5RC5Switching Transistor PWM
6RC4Fan Control PWM
7RC3Quadrature Decoder Input
8RC6Quadrature Decoder Input
9RC7I2C Serial Data (SDA)
10RB7I2C Serial Clock (SCL)
11RB6Debug Universal Asynchronous Receiver Transmitter (UART) TX
12RB5OPAMP In+
13RB4Display Reset
14RC2OPAMP Output
15RC1Push button Input
16RC0Heat Sink Thermistor
17RA2Cold Plate Thermistor
18RA1/ICSPCLKLED Status/ICSPCLK
19RA0/ICSPDATLED Error/ICSPDAT
20VSSGround