S12XEP100 PORTA7 problem

[dashuangshengds]

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!

[lama]

Hi,

you do not describe port connections (load) and entire setup. Pin is open drain after reset.

Only brief suggestion, PUCR_PUPAE=1;

Best regards,

Ladislav

[dashuangshengds]

Hi， thank you reply!