How to use anything other than the dedicated refclk with Stratic GX Transceiver

Programmable Devices

CPLDs, FPGAs, SoC FPGAs, Configuration, and Transceivers

How to use anything other than the dedicated refclk with Stratic GX Transceiver

1,035 Views

Hello,

I've been working on a design on the Stratix V GX SI Development Board. On this board, there exists a 644MHz refclock on the refclock input for the bank that I wish to use. I need to feed a different refclock to it, but have been utterly unable to get any alternate design to pass the Quartus fitter, even though according to documentation it should be possible to do so. I can't find any design examples on how to get this to work.

I've tried using a fractional PLL output, and I've tried using the ALTCLKCTRL component.

What am I missing?

Thanks in advance,

Ray

Link Copied

0 Replies

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.