CMSIS-DAP Protocol https://www.keil.com/pack/doc/CMSIS/DAP/html/group__DAP__Connect.html
Default mode: configuration of the DAP port mode is derived from DAP_DEFAULT_PORT
JTAG mode: connect with 4/5-pin JTAG mode
SWD mode: connect with Serial Wire Debug mode
CMSIS-DAP Protocol https://www.keil.com/pack/doc/CMSIS/DAP/html/group__DAP__Connect.html