SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
The RTC module is designed to keep wall time. The RTC can operate in seconds counter mode or calendar mode. A 32.768 kHz clock source along with a 15-bit predivider reduces the clock to 1 Hz. The 1-Hz clock is used to increment the 32-bit counter and keep track of seconds. In calendar mode, registers are provided which support the tracking of date, month, year and day-of-week. A match register can be configured to interrupt or wake the system from hibernate. In addition, a software trim register is implemented to allow the user to compensate for oscillator inaccuracies using software.