3.3.5.8.2 AVR debugWIRE Pinout
When designing an application PCB which includes an Microchip AVR with the debugWIRE interface, the pinout shown in the figure below should be used.
| AVR Port Pins | Target pins | debugWIRE Pinout |
|---|---|---|
| Pin 1 (TCK) | ||
| Pin 2 (GND) | GND | 6 |
| Pin 3 (TDO) | ||
| Pin 4 (VTref) | VTref | 2 |
| Pin 5 (TMS) | ||
| Pin 6 (nSRST) | RESET | 5 |
| Pin 7 (Not connected) | ||
| Pin 8 (nTRST) | ||
| Pin 9 (TDI) | ||
| Pin 10 (GND) |