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HDMI TX ADV7511W

Hi,

I am using HDMI TX ADV7511W with its digital inputs interfaced to FPGA (Virtex 7).

The datasheet mentions that its video/audio logic accepts levels from 1.8V to 3.3V.

The IC ADV7511W has 1.8V Supply Voltage (DVDD, AVDD, PVDD, BGVDD) and 3.3V Supply Voltage (DVDD_3V). There is no specific IO voltage pin (like DVDD_IO for some other interfaces). So how does it know which IO Voltage its working with? 

Can I interface its digital inputs with LVCMOS18 IO standard working on 1.8V IO interfaced to FPGA?

-Chinmay

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  • The Hardware Users Guide Table 1, defines the digital input acceptable voltage levels.  Digital outputs are still defined with a 3.3V rail.  The only digital outputs are INT, SDA and SPDIF_OUT and are referenced from MVdd (3.3V).  If you attempt lower MVdd to 2.5V then it is possible the output timing might slow down.  Again we have no specific test data with MVdd at 2.5V.

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  • The Hardware Users Guide Table 1, defines the digital input acceptable voltage levels.  Digital outputs are still defined with a 3.3V rail.  The only digital outputs are INT, SDA and SPDIF_OUT and are referenced from MVdd (3.3V).  If you attempt lower MVdd to 2.5V then it is possible the output timing might slow down.  Again we have no specific test data with MVdd at 2.5V.

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