请问dp接口的电源回复引脚如何接？

DisplayPort Pin 19 RET : Return Path for Power ?
電源除了自己本身還需要什時麼接腳?

上图吧

NXP PTN3392
上別人的圖！

大师真厉害，收徒弟不

请问这return引脚的作用是什么?

非常感谢，auxp与auxn也走差分线?，串联的电容有何用

DisplayPort 1.2 Standard
AUX CH
Half-duplex, bi-directional channel between DisplayPort transmitter and DisplayPort receiver. Consists of 1 differential pair transporting self-clocked data. The DisplayPort AUX CH supports a bandwidth of 1Mbps over DisplayPort link. DisplayPort Source Device is the master (also referred to as AUX CH requester) that initiates an AUX CH transaction. DisplayPort Sink Device is the slave (also referred to as AUX CH replier) that replies to the AUX CH transaction initiated by the requester.
串電容一般是要隔絕直流（DC Blocking）。
AUX+ 和 AUX- 既為差分訊號，一般走線會以差分線處理，但因規範說其速度只有 1Mbps，所以對 PCB Layout 上可能不會很敏感。