ADV7511 application schematic for DVI connections

Hi,

  In DVI functionality of ADV7511, You can connect the unused audio inputs to Ground/Pull down resistor for each audio input pin and best method is to use a Pull-down resistor for each audio input pin in case you want to experiment with these pins.

  Kindly note that, the IC connected to ADV7511 has digital video output but not digital audio output, you should put pull-down resistors on the ADV7511audio inputs and set the bit labeled "Audio Sample Packet Enable" to 0 (Disabled).

Note:  DVI and HDMI use the same signaling. Below are the major difference between two

DVI:  HDMI Transmitter like ADV7511 supports both HDMI and DVI modes. In DVI mode no packets will be sent, and all registers relating to packets and info-frames will be disregarded. DVI only supports the RGB colorspace, so, if the input is not RGB, it is important to remember to set the color space conversion to output RGB when DVI mode is enabled. The current mode of HDMI or DVI can be confirmed by the read only (RO) bit 0xC6[4].

HDMI: HDMI carries audio/video data and info-frame packages in the blanking areas. We know a video stream is HDMI when an AVI info-frame packet is detected.

Thanks,

Poornima

Hi Poornima,  

Thanks you so much for the reply,  may I know how the CEC and HEAC pins should be configured for DVI only usage.  Also the DVI source we have doesnt have DDC signals either,  should dummy signals be provided by controller for DDC for this chip to work?

Hi,

  Regarding DVI, the CEC (Consumer Electronics Control) and HEAC (HDMI Ethernet and Audio Return Channel) pins are not used, as these features are specific to HDMI. Therefore you can leave these pins unconnected or grounded, depending on your specific hardware design requirements.

  Also if your source does not provide DDC signals, consider using a controller to generate dummy signals.

Thanks,

Poornima