I am designing H/W F/W for USB OTG on KL25Z. Now I know in OTG design, the ID-pin should be floating as device (type B), and ground for host (type A). KLQRUG.pdf
However, I am not sure the result of reading digital input on specific floating GPIO, high, low or uncertain state?
Should I enable pull-up of GPIO (PE/PS in PORTx_PCRn)?