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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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  • From the electrical specifications Vih_min = 1.35V and Vih_max = 3.5V so it will work with FPGA 1.8V busses or LVCMOS18.  The part doesn't care which input voltage you are driving the signals at. 

    The I2C lines are spec'd at Vih_min=1.4V

    SDA and INT pins are open collector outputs so they should be pulled to either 1.8 or 3.3V

    INT is also an output but it can be configured as

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  • From the electrical specifications Vih_min = 1.35V and Vih_max = 3.5V so it will work with FPGA 1.8V busses or LVCMOS18.  The part doesn't care which input voltage you are driving the signals at. 

    The I2C lines are spec'd at Vih_min=1.4V

    SDA and INT pins are open collector outputs so they should be pulled to either 1.8 or 3.3V

    INT is also an output but it can be configured as

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