As per design HDMI_CEC is connected to IMX8 Processor. The Signal HDMI_CEC in generally 3.3V logic signal, but my question here is As per design HDMI_AVDDIO is 1.8V this means interface is tolerant to 1.8V logic signals only. So why this HDMI_CEC (3.3V logic Signal) Connected to IMX8 Processor without any level translator?
Sorry for late reply, I am not at work on last days. About your above questions, I have confirmed with our expert team. Here is the reply:
There are some mistakes in the 8m datasheet;
power domain of HDMI_CEC, HDMI_DDC_SCL, HDMI_DDC_SDA are not correct;
HDMI_CEC, HDMI_DDC_SCL, HDMI_DDC_SDA are connected directly the HDMI PHY;
HDMI_CEC is 3.3V;
HDMI_DDC_SCL, HDMI_DDC_SDA are up to 5v;
Have a nice day