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ADV7611 HDMI clk Measurement

Question asked by aneeshp on Jul 11, 2013
Latest reply on Aug 16, 2013 by aneeshp

Dear all,

 

We are using adv 7611 as hdmi rxr..and the inputs to the chip are 1080p 50Hz and 1080p 60 Hz..

also we need to display the detected video standard on a character LCD...

we are measuring the HDMI clk  by reading the registers 0x51 and 0x52 of HDMI map.

when the input is 60 HZ we are getting 148.73(expected is 148.5 mhZ) ,which is ok...but when the input is 50Hz it gives wrong reading

ie 148.66 MHz (expected is 123.75 MHz)...

 

any comments   !!

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