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Altera_Forum
Honored Contributor
Honored ContributorUP clock signals with 27MHz input
I'm using the 'clock signals for DE-series board peripherals' core which uses the external 27MHz crystal connected to the clk_in_secondary input to get a 12.288MHz out which i connected to the AUD_XC...
Altera_ForumHonored Contributor
Honored ContributorNo, basically the clock signals core requires a 27MHz signal to generate the audio clock but i cannot get the audio chip to work at all using this clock.
I can only get the audio codec to work when driven by a ALTPLL core with 50MHz input. What i am asking is, do i need to do anything else to use the 27MHz crystal? i'm only thinking this because it looks like the 27MHz crystal is connected to the video chip. maybe i should just stick with using ALTPLL, it seems to work fine i guess
