AnsweredAssumed Answered

ADV7441 I2C not getting detected

Question asked by Suresha on Jul 30, 2012
Latest reply on Jul 30, 2012 by GuenterL

Hi all,


We have used ADV7441 in one of our designs. We are unable to detect I2C address from ADV7441 .


Below are our observations,

  • All the supply voltages to ADV7441 are coming properly.
  • We are getting the clock input to ADV7441 properly.
  • Voltage on the internal reference output pins are -

                    REFN - 0.708

                    REFP - 1.202

                    CML - 0.911

                    RFLOUT - 0.682

         We were unable to find the nominal voltage on these pins from the datasheet . Are these values are correct ?

  • We are using  a I2C probe function which sends out I2C address from 0x00 to 0x7F and checking for acknowledgement from slaves. We are not getting acknowledgement for any of 8 different addresses of ADV7441.


How can we make sure that ADV7441 is up and working fine without I2C access ?