SAM SWD Pinout

For the 10-pin JTAG connector:
Figure 1. SAM SWD Header Pinout
Table 1. SAM SWD Pin Description
Name SAM Port Pin Description
SWDCLK 4 Serial Wire Debug Clock
SWDIO 2 Serial Wire Debug Data Input/Output
SWO 6 Serial Wire Output (optional- not implemented on all devices)
nSRST 10 Reset - not used by MPLAB ICE 4
VTG 1 Target voltage reference - not used by MPLAB ICE 4
GND 3, 5, 9 Ground