Posted on August 02, 2017 at 20:01I am using an STM32F746 for PWM generation and counting. When I loop the PWM output back to a counter, the amplitude of the PWM drops from 3.3v to about 2.0v. If I set the counter pin to input mode, the 3.3 v level is restored regardless of any pullup configuration. What is there about the counter input that will cause a timer output to drop when configured in counter mode?
