Hi,I'm a student who has just begun to use FPGAs. How can I find the precision and accuracy of the 50 MHz system clock of the Cyclone III Starter Board? I've looked at the User Guide and at other web documentation but I haven't been able to find this particular information. Thank you so much if you can respond.
- Cyclone® III FPGAs
There should be a bill of materials somewhere in the documentation for the board. Find the manufacturer's part# for the 50MHz oscillator and then find a data sheet for that part. The data sheet will give you the information you need.
--- Quote Start --- I'm a student who has just begun to use FPGAs. How can I find the precision and accuracy of the 50 MHz system clock of the Cyclone III Starter Board? --- Quote End --- Perhaps a more important question is, "Why are you interested in that parameter?" Most cheap oscillators will have specifications like 50MHz with some parts-per-million (ppm) tolerance ... Mouser has a pull-down menu with the PPM tolerance .... http://www.mouser.com/passive-components/frequency-control-timing-devices/oscillators/standard-clock... If you really had a "precision" application, then the on-board oscillator might not be what you should use? For example, you might be better off connecting your board to an externa clock source that is generated by a synthesizer. Describe your concern or interest, and people can chime in with advice. Cheers, Dave
Thank you both!Using the BOM linked to on this page: http://www.linear.com/solutions/5129 I found this: http://www.digikey.com/product-detail/en/ecs-inc/ecs-3953c-500-tr/xc726ct-nd/274086 Frequency Stability = ±100ppm