SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
The wait for interrupt instruction, WFI, causes immediate entry to sleep mode unless the wake-up condition is true (see Section 1.8.2.1). When the processor executes a WFI instruction, it stops executing instructions and enters sleep mode. See the Cortex-M4 instruction set chapter in the Arm Cortex-M4 Devices Generic User Guide for more information.