3.3V J1001 HDMI CEC signal is connected HDMI_CEC with no level shift to 1.8V as HDMI_AVDDIO is 1.8V. Also HPD signal as highlighted in below schematics
The D1003 voltage drop is 0.59V only.
Do you mean the HDMI_CEC power? Could you tell us your question exactly. I will confirm it for you.
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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?
I am confirming it for you. And will give you reply as soon as possible.
Hi Rita Wang,
How are you?
Any updates for my question.
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;
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