For the 10-pin JTAG connector:Figure 3-10. SAM SWD Header Pinout
Table 3-6. 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
VTG
1
Target voltage reference - not used by MPLAB ICD 5
GND
3, 5, 9
Ground
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