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ADV7844 Dynamic Settings for HDMI Mode

Question asked by Jane on Feb 2, 2015
Latest reply on Feb 3, 2015 by GuenterL

Dear Expert,

There is a question about ADV7844 Equalizer Settings for HDMI Mode.

It is mentioned in <ADV7844 Register Settings Recommendations>:

The ADV7844 contains a dynamic equalizer. This has been optimized for different cable lengths and characteristics; the following write is required for full optimization.

All other settings must remain at default.

68 8A 1E Recommended EQ setting

68 8D 04 Recommended EQ setting

68 8E 1E Recommended EQ setting

68 90 04 Recommended EQ setting

68 91 1E Recommended EQ setting

68 93 04 Recommended EQ setting

68 94 1E Recommended EQ setting

68 9D 02 Recommended EQ setting

According to ADV7844 hardware user manual EQ_DYN_EN (default value is 0), Addr 68 (HDMI), Address 0x96[0] should be set to 1 to enable HDMI Equalizer Dynamic Control (Equaliser is configured via EQ_DYNx_HF and EQ_DYNx_LF settings.).

But in ADV7844 reference script for HDMI there is no content about Addr 68 (HDMI), Address 0x96[0] setting. Is there anything missing in the script?  Without setting EQ_DYN_EN to 1, the Recommended Equalizer Settings is valid or not?

 

Many thanks for your help in advance.

 

Jane

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