ARM SWD Connector
ARM Serial Wire Debug Connector
On PCB, 0.05" (1.27mm) Male 2x5 Pin Header
JTAG / SWDEBUG +-----+ Vref | 1 2 | TMS / SWDIO GND | 3 4 | TCK / SWDCLK GND 5 6 | TDO / SWO NC | 7 8 | TDI / NC GND | 9 10| nRESET / (optional) +-----+
Vref must be the associated HIGH voltage for the JTAG or SWDEBUG signals. (Used by debug adapter level shifters)
If connector is shrouded, there must be a gap adjacent to pin 5.
If SWO is not available, a spare UART TX can be useful in its place.
Minimum connectivity required for programming and debug: pins 1-4.