Question from customer:
How to connect CEC line?
ADV7612 has two inputs but only one CEC pin.
In general - the best is to follow our recommendation we provide on Design Support files
http://ez.analog.com/docs/DOC-1751 (recommended schematics).
In general we short CEC lines of two inputs. CEC engine on ADV7612 supports internally
two CEC SPA addresses - therefore it is recommended setting. Additionally there should
be ultra-low leakage pull-up on CEC line. HDMI spec specifies that this line must not
have excessive leakage (refer to spec). Any switches on those lines are not recommended
as they introduce additional resistance and change characteristics of the line.
If switches or anything additional is necessary - please check this in spec:
More details about CEC line in documents:
HDMI Specification 1.4, chapter 4.2.10 - table 4-40
CEC 4, CEC 5 Chapters in CEC Appendix.
Also 8.6 of HDMI Spec might be useful to read.
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