A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the analog and digital grounds separate and connect them at a single point. Use a common mode filter and a ferrite bead to reduce EMI.
Use the built-in HDMI transmitter calibration feature to optimize the output. Ensure the HDMI clock frequency is set correctly, and the transmitter is configured for the correct video mode. Also, use a high-quality HDMI cable and ensure the receiver is HDMI 1.4 compliant.
The maximum cable length supported is 30 meters at 1080p resolution. However, this can vary depending on the cable quality, resolution, and transmission frequency. It's recommended to use a high-quality HDMI cable and repeaters or active cables for longer distances.
Check the HPD (Hot Plug Detect) pin connection and ensure it's properly connected to the HDMI connector. Verify the HPD signal is properly generated by the source device. Also, check the EDID (Extended Display Identification Data) data and ensure it's correctly read by the TDA19997HL/C1,518.
The typical power consumption is around 1.2W in active mode and 10mW in standby mode. However, this can vary depending on the specific application, clock frequency, and operating conditions.
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