Original question:
Hello,
I'm trying to use SN65DP149 as DP++ to HDMI redriver. In the application, on the source side, SCL and SDA pins are driven by the video source. However, on the sink side, nothing moves. SCL_SNK constantly stays at 5VDC. What could cause this issue? I'm sending the probe results of the SDA_SRC and SCL_SRC below. Somehow these signals don't pass through the IC.
Dear Brian, you can find the schematic below:
AC decoupling for the VID signals is done at the source side. SCL_SRC and SDA_SRC signals are pulled up to 3.3V via 2k ohm resistors.
We can observe that DP149 transmits HPD signal from SNK side to SRC side. But DDC signals somehow cannot pass from SRC to SNK.
