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Altera_Forum
Honored Contributor
16 years agoClock Hold warning
Hello friends, I have complete and simulate some design for MAX3000A. I have one warning I cannot avoid Warning: Can't achieve minimum setup and hold requirement clock_in along 8 path(s)...
Altera_Forum
Honored Contributor
16 years ago --- Quote Start --- Hello again, I solved somehow, thanks link above :) Since I had negative skew, I had to insert eight LCELLs on that bus path. Now I've done from schematic and worked very well, but have no idea how to solve from verilog. So I need some LCELL equivalent logic in verilog. --- Quote End --- Hi, For Verilog you can use: LCELL <instance_name> (.in(<input_wire>), .out(<output_wire>)); BTW: Did you run a fast timing analysis also ? The delay caused by the LCELL depends on the power supply, temperature and device speed. Maybe your eight LCELL are not sufficient in case of fast timing conditions. Kind regards GPK