AVR UPDI Pinout

When designing an application PCB, which includes a Microchip AVR with the UPDI interface, the pinout shown below should be used.

Figure 1. UPDI Header Pinout
Table 1. UPDI Pin Mapping
AVR PORT Pin Target Pins Microchip STK600 UPDI Pinout
Pin 1 (TCK)    
Pin 2 (GND) GND 6
Pin 3 (TDO) UPDI_DATA 1
Pin 4 (VTG) VTG 2
Pin 5 (TMS)    
Pin 6 (nSRST)    
Pin 7 (Not connected)    
Pin 8 (nTRST)    
Pin 9 (TDI)    
Pin 10 (GND)