AnsweredAssumed Answered

ADV7626 DDC bus rate

Question asked by daisu on Apr 10, 2014
Latest reply on Apr 22, 2014 by daisu

Hello all,




Attached file HDMI Transmitter Application Issues.ppt  P.4 says that
ADV7626 recommends 20KHz of DDC clock frequency.
So, we think that HDMI transmitter can align DDC clock rate.


DDC clock of ADV7626 is 40KHz at default setting.
Our cable length is 50m with 1.5~2k ohm pull-up as specification
Communication can not be accommodated  due to large capacitance of cable.
We would like to reduce clock frequency, so please let me know how to change DDC clock freqnecy.