Occasional ContributorHello,
I have an FPGA clock coming into my design.
I want to simply send this clock using another pin.
From working with other vendors - I learned that the recommended practice is to use an Output DDR Flip Flop for that purpose - as described in this link :
https://forums.xilinx.com/t5/Timing-Analysis/Why-ODDR-for-forwarded-clock/td-p/756737
Is this also the recommended practice for Intel FPGAs ?
Frequent ContributorHi ,
In my point of view it depends upon your use case, if you want simple to give to an I/O pin you can directly hoke it up in RTL code and send the clock .
But if you need to route the clock in to global or any type of clock path, I will recommend to use the AltCLKCTRL ( alt clock control path) IP before giving to out put pin.
Occasional ContributorHi,
Is there an official Intel document that recommends ALTCLKCTRL for clock forwarding ?
Frequent ContributorHi ,
Kindly find the document for your reference
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/ug/ug_altclock.pdf
Occasional ContributorHi,
I've read this document.
But couldn't find where it suggests to use the ALTCLKCTRL for the purpose of forwarding the clock as I asked.
If this recommendation exists in the document - please point me to it.
Occasional ContributorThis is such a simple request - I really don't understand why no one can provide a definitive answer to it !
I'll ask again.
Please point me to an official Intel document that states the RECOMMENDED procedure for forwarding a clock to an output pin.
Frequent ContributorHi ,
May I know what device is it been using , i will send u the official document wiith respect to that device
Occasional ContributorArria V
Frequent ContributorHi,
Kindly find the below document for your reference .
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/arria-v/av_5v2.pdf#page=105&zoom=100,0,0
Page no: 102
Note:
These are the two documents in which Intel recommends the use of altclkctrl block .
Occasional ContributorHi,
I'm reading page 102.
It shows an option to use the ALTCLKCTRL block for clock muxing.
But I don't require clock muxing - so my question remains unanswered...
I have a SINGLE clock that's coming into an FPGA pin - I'm requirement to send it to an output pin.
What's the recommended procedure for that ?
Frequent ContributorHi ,
Altclkctrl is the best approach and the above two documents are the only reference we have for your query .
I want to set the expectation that , I could not able to provide any more further details or writing other than the above document , apology to say that.
