Quartus II Settings File Reference Manual - Altera

6–190 Chapter 6: Fitter Assignments
M144K_BLOCK_READ_CLOCK_DUTY_CYCLE_DEPENDENCY
M144K_BLOCK_READ_CLOCK_DUTY_CYCLE_DEPENDENCY
Type
Allows you to specify whether the M144K memory block read operations depend
upon the read clock’s duty cycle. When M144K memory blocks are driven by a read
clock with a very narrow pulse, they can go into a locked, inactive state. Turning on
this option allows the M144K memory blocks to operate dependent upon the read
clock’s duty cycle to prevent the memory blocks from going into to an inactive state;
however, turning on this option may degrade the performance of the M144K blocks.
Enumeration
■ Off
■ On
Device Support
This setting can be used in projects targeting the following device families:
■ Arria II GZ
■ HardCopy IV
■ Stratix IV
Notes
This assignment supports wildcards.
This assignment is included in the Fitter report.
Syntax
set_global_assignment -name M144K_BLOCK_READ_CLOCK_DUTY_CYCLE_DEPENDENCY -
entity
set_instance_assignment -name M144K_BLOCK_READ_CLOCK_DUTY_CYCLE_DEPENDENCY
-to -entity
set_global_assignment -name M144K_BLOCK_READ_CLOCK_DUTY_CYCLE_DEPENDENCY
Default Value
Off
Quartus Settings File June 2012 Altera Corporation
Reference Manual