4 Pass Through Connector
All signals from the connected MPLAB® Debugger/Programmer Hardware Tool are
available on an unmounted 1x8-pin 100 mil header. Consult the table below for which
signals are in use for your debugging/programming interface:
| MPLAB® Debugger/Programmer Hardware Tool | Programming Interface | ||||||
|---|---|---|---|---|---|---|---|
| Pin # | AVR Programming Adapter Pin Name | SPI | PDI | TPI | JTAG | UPDI v1 | UPDI v2 |
| 1 | MCLR | X | |||||
| 2 | VDD | X | X | X | X | X | X |
| 3 | GND | X | X | X | X | X | X |
| 4 | PGD | X | X | X | X | X | X |
| 5 | PGC | X | X | X | |||
| 6 | AUX | X | X | X | X | ||
| 7 | TX | X | X | ||||
| 8 | RX | X | |||||
Tip: Some Hardware Tools support USART/CDC communication.
For programming interfaces not using the RX/TX lines, you can use the RX/TX lines to
communicate with your target device.