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This document contains some notes that should help with a chipKIT Pi. It doesn’t contain all the pins of a normal Arduino. Here are the pins that are implemented and how they are hooked up the the Microchip PIC32. Note that the pins marked N/A are not hooked up and not used.
Socket JA1
| Arduino | chipKit | |
| D13/SCK | P25 | |
| D12/MISO | P17 | 5V Tolerant |
| D11/MOSI/PWM | P3 | |
| D10/SS | P16 | 5V Tolerant |
| D9/PWM | P22 | |
| D8 | P21 |
Socket JA2
| Arduino | chipKit | |
| D7/AIN1 | N/A | |
| D6/AIN0/PWM | N/A | |
| D5/T1/PWM | N/A | |
| D4/T0 | N/A | |
| D3/INT1/PWM | P24 | |
| D2/INT2 | P14 | 5V Tolerant |
| D1/TXD | P4 | |
| D0/RXD | P5 |
Socket JA3
| Arduino | chipKit |
| A0 | P2 |
| A1 | P26 |
| A2 | N/A |
| A3 | N/A |
| A4/SDA | P18 |
| A5/SCL | P17 |
Socket JA4
| Arduino | chipKit |
| RESET | RESET |
| 3.3V | 3.3V |
| 5V | 5V |
| GND | GND |
| GND | GND |
| VIN | VIN |