DigitalJohnson:
By the way, any suggestions on name of the third choice? Trying to keep it short and simple, like the other two. I don't know why, but I'm having a massive brain fart right now, can't come up with a simple, short name. :~
If it were me, I would probably use RX_TX or TX_RX. Maybe BOTH_RX_TX or BIDIRECTIONAL.