Pinout
The following pinout is valid on the target side:
Signal
Direction
Signal Description
Signal
Pin
Pin
Signal
Signal Description
Signal
Direction
I
Reference Voltage
Vref
1
2
NC
Not Connected
O
JTAG
nTRST
3
4
GND
Ground
O
Not Connected / JTAG
NC/TDI
5
6
GND
Ground
I/O / O
SWD/JTAG
SWDIO/TMS
7
8
GND
Ground
O
SWD/JTAG
SWDCLK/TCK
9
10
GND
Ground
I
Return TCK
RTCK
11
12
GND
Ground
I
SWD/JTAG
SWO/TDO
13
14
GND
Ground
I/O
Reset
nRESET
15
16
GND
Ground
O
Debug Request
DBGRQ
17
18
GND
Ground
I
Debug Acknowledge
DBACK
19
20
GND
Ground
20-pin ARM pinout
