Question related to clock resource on Stratix V GX evaluation board

[Steven06]

Hi,

I have difficulty finding the clock resource on Intel Stratix V GX edition transceiver signal integrity development kit. I have read the reference manual to this evaluation board, I saw there are 4 oscillators at 625MHz, 644.53125 MHz, 706.25 MHz, and 875 MHz available on board, but the device pin number is not available in the manual.

I am wondering if it is possible to utilize these oscillators for clock purpose for my verilog code? I am using clock control block (ALTCLKCTRL) IP core.

Please guide me how I should proceed.

Thank you,

Steven

[sstrell]

Have you downloaded the full kit installation? https://www.intel.com/content/www/us/en/products/details/fpga/development-kits/stratix/v-gx-signal-integrity.html

The schematics would have all the detail you need.

[FvM]

According to reference manual, said clocks are connected exclusively as transceiver reference clocks, thus not available to feed core clock network and PLLs.

[Steven06]

Hi FvM,

Thank you for your reply.

Can you please let me know which page in the manual this information is mentioned?

Thank you.

[Steven06]

Thank you sstrell, I'll look into the schematics of the kit.

[FvM]

Connection of oscillators is shown in reference manual, figure 2-6.

[KennyTan_Altera · Accepted solution]

The high-speed clocks on the Stratix V GX Signal Integrity Kit—those running at 625 MHz, 644.53125 MHz..... —are tied strictly to the transceiver circuits. They aren’t usable for core logic, can’t feed the main PLLs, and won’t connect through something like ALTCLKCTRL. They’re simply not wired for general use in your design. If you need a clock for your logic, you’ll have to look elsewhere—like a lower-frequency on-board oscillator (often something like 50 MHz), or bring in your own via an HSMC port or SMA connector. Just make sure the pin you use can actually connect to the FPGA’s internal clock routing.

[KennyTan_Altera]

Do you have further question?

[Steven06]

Hi Kenny_Tan, 

Thank you for your reply. 

That would be all questions I have for now. 

Best Regards, 

[KennyTan_Altera]

I’m glad that your question has been addressed, I now transition this thread to community support. If you have a new question, Please login to ‘https://supporttickets.intel.com/s/?language=en_US’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.