external set up time该怎么填?求指点!
本帖最后由 HAORUIMIN 于 2017-6-8 16:59 编辑
Equivalent SDC command:
#Set Pad to Setup Timing Requirement
set_input_delay -from [get_clocks clock_in] -to [all_inputs] 2.5
This example sets a 2.5 ns pad to set up timing constraints for all the external input
pin of the device to the registers that are clocked by the clock_in signal.
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