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Explorer
Explorer
15,442 Views
Registered: ‎11-02-2011

About set_multicycle_path

Hi all,

 

  set_multicycle_path -from [get_clocks clk_src] -to [get_clocks clk_dst] -setup 3 

  1. for -setup, the default is -end, right?

   2. for -hold, the default is -start, right?

 

Thanks

Rgds 

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3 Replies
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Scholar
Scholar
15,375 Views
Registered: ‎09-05-2011

Re: About set_multicycle_path

Hi,

 


The generic syntax for set_multicycle_path is

 

set_multicycle_path [-setup] [-hold] [-rise] [-fall] [-start] [-end]
[-reset_path] [-from args] [-rise_from args] [-fall_from args]
[-to args] [-rise_to args] [-fall_to args] [-through args]
[-rise_through args] [-fall_through args] [-quiet] [-verbose]
[path_multiplier ]

 

The [-setup] and [-hold] are optionals, which set the setup and hold multipliers respectively. The [-start] and [-end] specify that these multipliers are measured against path statpoint and path endpoint respectively.

 

Whereas, the [path_multiplier] specifies the number of clock cycles required for the specified path.

 

Hope it's clear now.

 

Regards.

 

 

 

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Explorer
Explorer
15,215 Views
Registered: ‎11-02-2011

Re: About set_multicycle_path

Hi ,

 

  Thanks. if we select -setup, the default reference clock is -end? I mean if we donot specify the reference clock, the default clock is endpoint clock, right?

 

Thanks

Rgds

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Xilinx Employee
Xilinx Employee
15,195 Views
Registered: ‎04-12-2010

Re: About set_multicycle_path

There's also a short video on "Setting Multi-cycle Paths"
http://www.xilinx.com/training/vivado/setting-multicycle-path-exceptions.htm

May be helpful. If you would like to see any other Vivado videos please let us know.

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