Compiler Directives

• Defined by (back tick) `<keyword>

• Located before the module declaration

• `timescale <reference_time_unit> / <time_precision>

  • <reference_time_unit> specifies the unit of measurement for times and delays
  • <time_precision> specifies the precision to which the delays are rounded off during simulation
  • Only 1, 10, and 100 are valid integers for specifying time unit and time precision
  • Example: `timescale 1 ns / 10 ps

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