I'm designing a board based on the MK64 (the FRDM K64 is my reference design). I do not use the USB features of the MK64. I am using the UART capabilities (using USB dongle to RS485 cable from a far host PC to my controller board, then to UART inputs on the MK64 via a MAX3362 RS 485 Transceiver).
In such case, do I need to connect a voltage to that pin?
Leave it float?