All EXTI interrupts work except PA3

HMSEdinburge · ‎2024-11-13

Hello,

It's a discussion continuity of the thread: https://community.st.com/t5/stm32-mcus-products/ext-interrupt-conflict-on-stm32h7/td-p/742235
I replace PA3 instead of PA1, now all interrupt sw works except PA3... whats happen to this PA3 interrupt??

SofLit · ‎2024-11-13

I don’t know.

Did you test the example I shared as it is or not?
Do you confirm you are using STM32H723 NUCLEO board? PA3 is on CN9/pin 1:

It's working from my side.

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HMSEdinburge · ‎2024-11-16

yes, i use your switch case, and its working! thanks. But PA3 still not...

MM..1 · ‎2024-11-16

Primary check with scope PA3 states, and secondary only one EXTI3 can be used. Check dont code other GPIOX3?

SofLit · ‎2024-11-16

Are you using CN9/pin 1 as EXTI input? PA3 to be connected to GND to trigger the EXTI interrupt.

At this stage, you need to check if the IO is not broken. Could you please try to toggle that PA3 pin?

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