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Altera_Forum
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13 years ago

warning:tsca_clk was determined to be a clock but was found without an associated clo

Warning: Node: tsca_clk was determined to be a clock but was found without an associated clock assignment. “tsca_clk” comes from an external device ,the clock frequency range from 8~50Mhz.how c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Is this clock is driving internal logic? If yes, then it's a real clock, not virtual: 

create_clock -name tsca_clk -period 20.000

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yes,it is driving internel modules,and its frequency is changeable.

the period is set as to the highest frequency?