Altera® Quartus® Prime Standard Edition Settings File Reference Manual

ID 683084
Date 5/08/2017
Public
Document Table of Contents

1.15.6. FAST_OUTPUT_REGISTER

Implements an output register in a cell that has a fast, direct connection to an I/O pin. If such a fast, direct connection to the I/O pin is not available in the I/O cell hardware, this option instructs the Fitter to lock the output register in the LAB adjacent to the I/O cell it is feeding.Turning on the Fast Output Register option can help maximize I/O timing performance, for example, by permitting fast clock-to-output times. Turning this option off for a particular signal prevents the Fitter from implementing the signal automatically in an I/O cell or locking down the output register in the LAB adjacent to the I/O cell. This option is ignored if it is applied to anything other than a register or an output or bidirectional pin fed by a register.

Type

Boolean

Device Support

  • Arria 10
  • Arria GX
  • Arria II GX
  • Arria II GZ
  • Arria V
  • Arria V GZ
  • Cyclone
  • Cyclone 10 LP
  • Cyclone II
  • Cyclone III
  • Cyclone III LS
  • Cyclone IV E
  • Cyclone IV GX
  • Cyclone V
  • A
  • E
  • HardCopy II
  • HardCopy III
  • HardCopy IV
  • MAX 10
  • MAX II
  • MAX V
  • Mercury
  • Stratix
  • Stratix GX
  • Stratix II
  • Stratix II GX
  • Stratix III
  • Stratix IV
  • Stratix V

Notes

This assignment supports Fitter wildcards.

Syntax


		set_instance_assignment -name FAST_OUTPUT_REGISTER -to <to> -entity <entity name> <value>