OVS在第15、16頁有解釋,看你 I2C 上的 R side 電壓選擇去。 8 G. m% P. ~4 D& j, N & A9 @" n; j6 _PRE 是 TMDS Output de-emphasis adjustment ,可以先預留2個電阻,上拉和下拉電阻,等調適的時候看看哪個效果好,再決定。/ t6 N! U, I0 H) W! j5 F0 O1 e
原文在第15頁。節錄於下方。8 E; y4 Q& F. w. l& U* ?3 g
The PRE pin provides 3dB de-emphasis, allowing output signal pre-conditioning to offset interconnect losses from the TMDS141 outputs to a TMDS receiver. PRE is recommended to be set low while connecting to a receiver throw short PCB route.