Hello,
I use HD3SS215 as 2:1 sink HDMI application, like Figure 8 of datasheet but has a little different.
My design has two HDMI source (2 IC's HDMI Tx port) and are connected to port A and port B of HD3SS215 . And the port C of HD3SS215 is connected to standard HDMI connector.
My test result: (Setting AUX="M" 1.65V, DX="L" ; port A--> Port C; OE = 3.3V (VDD) )
Test 1: HDMI connector (Port C) is connected to monitor by HDMI cable.
- Measurement : DDC_SDA (port C) is about 4V. DDC_SDA(port A) is about 3V.
Test 2: HDMI connector (Port C) is open.
- Measurement : DDC_SDA (port C) is about 4V. DDC_SDA(port A) is about 3V. (the result is same to Test 1)
My design has only one pair of pullups, (2K ohm in Port C)
PS: the HDA works well.
When DDC is working, the level change is about 200~300mV (4V~3.8V). So monitor can't get the DDC command.
What is consider about this issue?
Best Regards