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ADV7180 - I2C communication with no pixel clock?

Question asked by peter_k on May 24, 2017
Latest reply on Jun 16, 2017 by Rob.Analog


I am attempting to communicate with an ADV7180 using an STM32 microcontroller over I2C and getting no response (no ACK when sending the slave address, even when scanning through the entire range of I2C addresses). I am trying to establish whether the chip is damaged or not. I am reasonably sure the crystal is not oscillating but don't have access to an oscilloscope to test.


Am I correct in assuming the ADV7180 only requires power to the supply voltage inputs (DVDD, DVDDIO etc), and should respond to I2C signals without a running pixel clock?