SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
To switch the operating mode of the DAP from SWD to JTAG mode, the external debug hardware must send a switch command to the microcontroller. The 16-bit TMS/SWDIO command for switching to JTAG mode is defined as b1110.0111.0011.1100, transmitted LSB first. This command can also be represented as 0xE73C when transmitted LSB first. The complete switch sequence should consist of the following transactions on the TCK / SWCLK and TMS / SWDIO signals:
To verify that the DAP has switched to the JTAG operating mode, set the JTAG IR to the IDCODE instruction and shift out the DR. The DR value can be compared against the device's known IDCODE to verify the switch.