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S12 PIN state

Question asked by wu wenbin on Sep 19, 2018
Latest reply on Sep 20, 2018 by wu wenbin

HI,

I use input capture function of S12ZVL32 to detect a falling edge,then I read the Port data register in the interrupt routine.

I find that it is low level;

I use input capture function of S12ZVL32 to detect a rising edge,then I read the Port data register in the interrupt routine.

I find that it is high level;

 

Problem:when I use the input capture function of S12ZVL32 to detect a edge,then can I judge the edge type by reading the pin level in the ISR?   (Of course,hardware fileter is done.)

 

In the RMV: a digital fileter on each pin prevents short pulses from generating an interrupt. A valid edge on an input is detected if 4 consecutive samples of a passive level are followed by 4 consecutive samples of an active level.

 

Thanks!

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