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Timer Current Consumption: always on vs. repeating single shot

Question asked by vel on Apr 4, 2018
Latest reply on Apr 4, 2018 by vel



I have a STM32L4 MCU in my coming product. I'm running a master timer at 500Hz. The master timer triggers four other timers. All of these timers drive PWM at 500Hz at different phase. (Cannot be done using single multi-channel timer) These need to be precisely in sync.


I can implement the slave timers in two ways:

1. Set up them as single shot timers, in which case the master timer triggers them every 2ms. Or

2. Let the master timer trigger the slaves when it's started and let all the timers run as long as needed.


The question is: Does the single shot configuration save any power, as the slaves are not running for some 50% of the time, since the PWM burst is quite fast?


I have no means to measure the current consumption so precisely, yet. Therefore I'm asking whether someone could tell the answer.