Well, right, that needs to be a multi-purpose serial interface device, and who knows what crazy timing requirements some sensor or interface chip will need. An example: There are some cheap little radios around. They literally just output a carrier with a binary value encoded on it in a super-simple modulation. Even with an RT device, you've got to keep transmissions very short and include a clock-synch section at the beginning.
You can still transmit and receive if your devices have a lot of jitter, but you'll have to kill your transmission rate to keep things working reliably.
You can still transmit and receive if your devices have a lot of jitter, but you'll have to kill your transmission rate to keep things working reliably.