Re: pad, timing, function???
Dear rol73,
"you could verify if any path from stimuli (other than clock) have same length than clock itself (with PAD)... " ????
Do you mean that I need to check the path length of clock (from testbench clk generation output to clk pad output) & that of other stimuli, take "d_in" as example(from behavior model "d_in" to WHERE?)? And compare them to see they are the same or not? ???
But path length from testbench need not be considered as they are not part of rtl, which is the final design.
I think I don't catch you. So would you please give a more detail demonstration? Thanks a lot!
By the way, you said "your clock enters the chip a delta later than using a simple wire". This is the real effect of buffer. But from the behavior model of the pad code, it can be seen that the delays in specify block are all set to zero, and from the dump waveform the delta difference between internal clock and other input (with pad too) cannot be seen.
Could you give me more help? Thanks a lot!
Best Regards,
qjlsy