AnsweredAssumed Answered

ADV7842 BL and LCF registers

Question asked by jbolduc01 on Mar 26, 2015
Latest reply on May 8, 2015 by DerekBurke


I would like to know a reliable way to detect the VGA input on this part. I see that the LCF register is not very accurate according to the real total pixels value. For example, when inputting a 1280x720p60 format, I read 745 in this register.


Also, when inputting 1680x1050 or 1400x1050, I have almost the same values for LCF and BL.


I also noticed that when using different sources, I do not get the same values. This is a problem since our device can be connected to different sources.


I added a tolerance in my firmware in order to detect properly the input resolution but I'm concerned that some sources will just not work.