SLAU723A October 2017 – October 2018 MSP432E401Y , MSP432E411Y
The Wait-for-Trigger mode allows daisy chaining of the timer modules such that once configured, a single timer can initiate multiple timing events using the Timer triggers. Wait-for-Trigger mode is enabled by setting the TnWOT bit in the GPTMTnMR register. When the TnWOT bit is set, Timer N+1 does not begin counting until the timer in the previous position in the daisy chain (Timer N) reaches its time-out event. The daisy chain is configured such that GPTM1 always follows GPTM0, GPTM2 follows GPTM1, and so on. If Timer A is configured as a 32-bit (16- or 32-bit mode) timer (controlled by the GPTMCFG field in the GPTMCFG register), it triggers Timer A in the next module. If Timer A is configured as a 16-bit (16- or 32-bit mode) timer, it triggers Timer B in the same module, and Timer B triggers Timer A in the next module. Figure 18-8 shows how the GPTMCFG bit affects the daisy chain. This function is valid for one-shot, periodic, and PWM modes.
NOTE
If the application requires cyclical daisy-chaining, the TAWOT bit in the GPTMTAMR register of Timer 0 can be set. In this case, Timer 0 waits for a trigger from the last timer module in the chain.