What is the difference between "time_closure" and "present" options in NIC-400?

Hello,

I am trying to add a register slice to an AXI ASIB in my NIC-400 configuration using the uArchitecture Editor in Socrates.  The Timing Closure tab gives me the options of "time_closure" and "present" for each AXI channel.  What is the difference between these two options?

Thanks,

Lloyd

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  • Never mind, I found the answer in section 9.5.12 of the User Guide.

    present = A register slice always exists at this location

    time_closure = A register slice "might" exist at this location, meaning you have the ability to add one later by editing a Verilog file instead of going through Socrates to regenerate the RTL.

    Thanks,

    Lloyd

Reply
  • Never mind, I found the answer in section 9.5.12 of the User Guide.

    present = A register slice always exists at this location

    time_closure = A register slice "might" exist at this location, meaning you have the ability to add one later by editing a Verilog file instead of going through Socrates to regenerate the RTL.

    Thanks,

    Lloyd

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