What is the exact meaning of''the EXTI can detect an external line with a pulse width shorter than the internal APB2 clock period'' in STM32F1

Rashad Shubita · ‎2017-12-28

Posted on December 28, 2017 at 13:31

Please if anyone can explain this to me!

Thanks in advance.

Uwe Bonnes · ‎2017-12-29

Posted on December 29, 2017 at 12:10

A minimum pulse width on EXTI is enough to trigger the interrupt. This minimum pulse width is not dependant an th APB2 clock frequency,

Tesla DeLorean · ‎2017-12-29

Posted on December 29, 2017 at 17:28

But is likely dependent on the resychronizer at the pin.

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Jan Waclawek · ‎2017-12-29

Posted on December 29, 2017 at 23:15

Clive,

this has been discussed a couple of months ago, and as Edison from the ST Prague support group confirmed, EXTI is surprisingly asynchronous.

Jan

Jan Waclawek · ‎2018-01-17

Posted on January 17, 2018 at 23:38

Just plugging in the link:

Rashad Shubita · ‎2018-01-18

Posted on January 18, 2018 at 13:22

Thank you all for helping me !!