GPIO Input Problem

[preddy]

Hi, We were using S32k144 Controller. We were trying to fetch GPIO pin status on PTA11 pin. When constant 5 Volts has been given to this pin it's showing pin status as High but this is not stable, some times it's showing status as Low even there is no drop on 5V.

Please suggest what might be the problem

[lukaszadrapa]

Hi,

what is the source of the signal and what is the source impedance of that signal? I can't see reason for such behavior.

Regards,

Lukas