Low voltage on STM32 F103x8

ankushkhare89 · ‎2016-06-22

Posted on June 22, 2016 at 16:56

Hello

I have configured the TIMER3 to output PWM on PA6, PA7

I need the PWM to initialize a device which require PWM input.

First it worked fine, but on second day, the voltage of that pin dropped from 3V approx to 0.1V. I am able to see PWM at such low voltage using oscilloscope, but my concern is regarding the voltage. How can I proceed further ? I am not able to initialize my device at such low voltage. Is the pin damaged ?

#!stm32

Tesla DeLorean · ‎2016-06-22

Posted on June 22, 2016 at 19:12

Is the pin damaged ?

Does it work if you disconnect the load? If still broken, yes you've probably burned things up, suggest you review the type of load you are driving, and if the current rating of the output meets that.

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ankushkhare89 · ‎2016-06-23

Posted on June 23, 2016 at 09:08

Hello,

The pin is giving output pulse PWM but the voltage is 0.1 V on the oscilloscope. In the beginning it was 3.3V and then I connected a device. After that I removed the device and found the voltage went down to 0.1V.

What do you suggest to protect my new uC so that same thing don't happen to it ?