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Steve-Mowbray-ENL's avatar
Steve-Mowbray-ENL
Icon for Occasional Contributor rankOccasional Contributor
4 days ago

How to tell Quartus my Arria10 target system CLKUSR frequency is 100MHz?

Timing analyser reports CLKUSR at 125MHz but target system has 100MHz on this pin to accommodate AS in combination with transceiver calibration as per the manuals -- there doesn't seem to be any cons...
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Farabi's avatar
Farabi
Icon for Regular Contributor rankRegular Contributor
2 days ago

Hi, 

Can you try this : remove the location assignment on it. Otherwise, to remove the critical warning use the QSF assignment 'set_global_assignment -name AUTO_RESERVE_CLKUSR_FOR_CALIBRATION OFF'.

regards,
Farabi

Steve-Mowbray-ENL's avatar
Steve-Mowbray-ENL
Icon for Occasional Contributor rankOccasional Contributor
2 hours ago

Hi Farabi

Rather than experimenting with cludge fixes I am focussing on the Platform Designer automatic generated:

(*altera_attribute = "-name SDC_STATEMENT \"if { [get_collection_size [get_pins -compatibility_mode -nowarn ~ALTERA_CLKUSR~~ibuf|o]] > 0 } { create_clock -name ~ALTERA_CLKUSR~ -period 8 [get_pins -compatibility_mode -nowarn ~ALTERA_CLKUSR~~ibuf|o] }\"" *)

associated with the transceiver reset sequencer instance in the design -- doesn't seem to be an obvious IP parameter to tell the instance that CLKUSR is at 100MHz rather than 125MHz...