STM32F417___WRITING DATA THROUGH I2C3 CAUSE EXTI9_5_IRQHandler TRIGGER

[Yuktheshwar Bhat]

1) I have configured PG8 gpio as external interrupt mode.

2) When i am writing data using I2C3 , EXTI9_5_IRQ Handler is getting trigger,but their is no activity in PG8 pin.

What is the reason for this problem.

I2C3 GPIOs.

PC9 -> SDA

PA8 -> SCL

[waclawek.jan]

Observe the EXTI_PR register to find out, which line caused the interrupt.

JW

[S.Ma]

Checking for crosstalk and monitoring EXTI on oscillosope probe could help.

Activating internal pull-up resistor on EXTI might also help?