STDVE001A Datasheet, PDF (19/49 Pages) STMicroelectronics – Adaptive single 3.4 Gbps TMDS/HDMI signal equalizer

STDVE001A
Functional description
3.9
CEC
The CEC channel is a dedicated single pin bus and electrically translates to a bi-directional
buffer used to ensure that the electrical specs of the CEC are met even with high
capacitance on the single CEC line. The pull-up resistor of 26K? is integrated on either sides
of the buffer. The CEC is used for AV control of the electronic devices connected in a HDMI
cluster. The drive of the buffer is set to meet the requirements of the CEC. This is optionally
used for higher-level user functions such as automatic set-up tasks or tasks typically
associated with infrared remote control usage.
The CEC line is continuously monitored during the power-on state and is not monitored
during powered-off state. In powered off state, the CEC line should not be pulled low and it
should not affect the CEC communication between other devices. The maximum
capacitance on the CEC lines can be 7.2nF.
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