TMDS171: TMDS171 ARC & SPDIF_IN design

Anne

The audio return channel in TMDS171 enables a TV, through a single HDMI cable, to send audio data upstream to an A/V receiver or surround audio controller, increasing user flexibility and eliminating the need for any separate S/PDIF audio connection. The TMDS181 supports single mode audio return channel. Customer can import the S/PDIF signal to SPDIF_IN and send out the signal from ARC_OUT and pass through the general
HDMI cable to audio receiver.

When not using ARC_OUT just leave it floated, when not using SPDIF use a 500k pulldown.

Thanks
David