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I2C communication with the ADV7180

Question asked by Fionn Employee on Aug 30, 2010
Latest reply on Sep 19, 2012 by dbjung2k1.

Question from customer

I a working with the ADV7180 and I am having some I2C trouble. I am not getting an acknowledge back when we put out the device address 0x42 (ALSB high). Can you tell me what the start up sequence should be. Powerdown is always low and reset is tied to an FPGA that can be used to toggle the line. Is it necessary to toggle reset after power up? Does Power Down need to be high when the reset is toggled. What does the data sheet mean when it says "The I2C master controller receives a no acknowledge condition on the ninth clock cycle when chip reset is implemented"???