Visible to Intel only — GUID: xcx1489538067052
Ixiasoft
Visible to Intel only — GUID: xcx1489538067052
Ixiasoft
1.15.5. FAST_OUTPUT_ENABLE_REGISTER
Implements an output enable 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 enable register in the LAB adjacent to the I/O cell it is feeding.Turning on the Fast Output Enable 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 enable 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
- 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_ENABLE_REGISTER -to <to> -entity <entity name> <value>