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Altera_Forum
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15 years ago

About ALTLVDS ipcore

I want to use the altlvds ipcore in cycloneIII,but I have some problem about it. I used to work with hard serdes embemded in fpga(lattice ecp2m),at the receiver,it needs a input reference clk similar...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Soft-CDR functionality isn't available for Cyclone III or Cyclone IV FPGAs. With these chips, you need a RX input clock synchronous to the data (= sourced from the TX side), not just a same frequency reference clock.