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Altera_Forum
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10 years ago

cyclone V caacading fpll for sdi ii(transceiver) xcvr_refclk filter error?

I use SDI II ip core, the sdi ii xcvr_refclk , I use the Fractional PLL (fPLL) to supply it . http://www.alteraforum.com/forum/attachment.php?attachmentid=10858&stc=1 http://www.alteraforum.co...
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Altera_Forum
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10 years ago

Hi,

Regarding the cascade PLL, it seems like you are using one fPLL driving another fPLL which then drive the SDI II IP's refclk. For your information, in the transceiver generally one fPLL driving the refclk which then drive the TX PLL is only. My experience is two fPLL might trigger error.