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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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  • Okey, for the other hand, Hardware Users Guide indicates:

    " The interrupt pin, INT is an open drain output. It should be pulled to a logic high level (such as 1.8V or 3.3V depending on the high logic level of the microcontroller) through a resistor (2kOhm to 5kOhm)"

    The SDA and SCL pins should be connected to an I2C Master. A pull-up resistor of 2kΩ (+/-10%) to 1.8V or 3.3V is recommended for each of these signals. "

    So, can I pull-up these pins to 2.5V or the output timing can slow down?

    Moreover, to interface digital input pins to 2.5V, I have to change the level of the power supply pins (AVDD, BGVDD, DVDD, PVDD)?

    Thanks.

Reply
  • Okey, for the other hand, Hardware Users Guide indicates:

    " The interrupt pin, INT is an open drain output. It should be pulled to a logic high level (such as 1.8V or 3.3V depending on the high logic level of the microcontroller) through a resistor (2kOhm to 5kOhm)"

    The SDA and SCL pins should be connected to an I2C Master. A pull-up resistor of 2kΩ (+/-10%) to 1.8V or 3.3V is recommended for each of these signals. "

    So, can I pull-up these pins to 2.5V or the output timing can slow down?

    Moreover, to interface digital input pins to 2.5V, I have to change the level of the power supply pins (AVDD, BGVDD, DVDD, PVDD)?

    Thanks.

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