When multiple pins are simultaneously set to the same external interrupt, what is the external interrupt logic based on the mode bit and polarity bit?
* Question
| When multiple pins are simultaneously set to the same external interrupt, what is the external interrupt logic based on the mode bit and polarity bit? |
* Answer
| The external interrupt logic is processed as follows: In the low-level trigger mode, the state of all pins using the EINT function is connected to a positive logic AND gate.If there is a multi-pin input, use the pin with the lowest GPIo port number, regardless of the polarity setting of the pin.Selecting multiple EINT pins in the edge trigger mode is considered a programming error. |
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