Quartus II Settings File Reference Manual - Altera

6–272 Chapter 6: Fitter Assignments
PRESERVE_PLL_COUNTER_ORDER
PRESERVE_PLL_COUNTER_ORDER
Type
Preserves the order of PLL clock outputs used when selecting corresponding output
counters. For example, a clk0 output uses a C0 counter and a clk2 output uses a C2
counter. Turning this option can cause clock routing problems, as the clock router
cannot rotate counters to resolve conflicts.
Boolean
Device Support
This setting can be used in projects targeting the following device families:
■ Arria GX
■ Arria II GX
■ Arria II GZ
■ Cyclone
■ Cyclone II
■ Cyclone III
■ Cyclone III LS
■ Cyclone IV E
■ Cyclone IV GX
■ HardCopy II
■ HardCopy III
■ HardCopy IV
■ Stratix
■ Stratix GX
■ Stratix II
■ Stratix II GX
■ Stratix III
■ Stratix IV
Notes
This assignment supports wildcards.
Syntax
set_instance_assignment -name PRESERVE_PLL_COUNTER_ORDER -to -entity
Quartus Settings File June 2012 Altera Corporation
Reference Manual