On a custom baseboard, a LED in open drain is connected to X1 #134 (GPIO only) .
After enable power source, the LED is illuminated at once, even if the IOMUXC_PTA17 is loaded with default values → 0x00000060. I can measure the voltage level on Pin 134 and it seems to be around 1.4V, that explains why the LED is on.
This doesn’t match my expectation of the pin behaviour. I would expect high impedance on this pin until IOMUXC_PTA17 is configured by software.
The VF61 and VF50 are showing the same issue.
Is the signal on PIN 134 only driven by the Vybrid GPIO?
Is there maybe a pullup/pulldown at this signal on Colibri PCB?