I am playing around with the Xin/Xout commands using a PIC 16F88 and TW523 powerline interface.
I thought that the TW523 was supposed to be "smart" and only transmit when no other devices are talking on the powerline.

Is there some way (zero crossing pin??) to check if the power line is clear before transmitting a signal to avoid collisions?

Any help with this question, comments regarding Xin/Xout, or sample code would be greatly appreciated.

Thanks guys.