SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
For sensitive applications, the debug interface to the processor and peripherals can be permanently disabled, blocking all accesses to the device through the JTAG or SWD interfaces. With the debug interface disabled, it is still possible to perform standard IEEE instructions (such as boundary scan operations), but access to the processor and peripherals is blocked.
The DBG0 and DBG1 bits of the Boot Configuration (BOOTCFG) register control whether the debug interface is turned on or off.
The debug interface should not be permanently disabled without providing some mechanism, such as the bootloader, to provide customer-installable updates or bug fixes. Disabling the debug interface is permanent and cannot be reversed.