S12XEP100 GPIO output is not follow the software control.
I use PORTA7 as output. After my ECU power on, I set the GPIO is high and the pin voltage is high. When the ECU run few hours, the PORTA7 pin voltage is 0V, not high level.
So I check the PORTA register, the DDR and DATA is follow the design and not changed during the running.
I want to know, is there any other cause for this problem? Thank you!