TMC-20208: RAM Blocks with Unregistered Outputs that are the Source of Paths Failing Setup Analysis

Description

Violations of this rule identify RAM blocks with unregistered outputs that are source nodes of paths that fail setup analysis. Registering RAM outputs can significantly improve RAM's μtco.

Parameters

Name Description Type Default Value Min Value Max Value
maximum_setup_slack Reports a violation for timing paths that have a setup slack below the value of this parameter. double 0.0    
to_clock_filter Reports a violation for timing paths that end at a register in a clock domain that matches the value of this parameter. string *    
minimum_number_of_adders Reports a violation for timing endpoints that are preceded by a number of independent adder chains greater than or equal to this value. integer 3    
minimum_number_of_soft_mult_chains Reports a violation for timing endpoints that are preceded by a number of independent adder chains that are implementing multiplier logic greater than or equal to this value. integer 2    

Recommendation

Review the Fitter report 'RAM Summary'. Next, register RAM output to improve μtco by adding 1 additional pipeline to the design's RAM output path.

Severity

Medium

Tags

Tag Description
ram  

Device Family

  • Intel® Stratix® 10
  • Intel® Agilex™
  • Intel® Arria® 10
  • Intel® Cyclone® 10 GX