Altera Quartus II Settings File - Manual (Page 493)

DDIO_OUTPUT_REGISTER
Directs the Compiler to perform special placement and routing of the specified register to provide a
glitch-free output. This is used for registers involved in DDR memory interfaces. A setting of High
designates the output register used when the output mux select is 1; a setting of Low designates the output
register used when the output mux select is 0.
Type
Enumeration
Values
• High
• Low
• Off
Device Support
This setting can be used in projects targeting any Altera device family.
Notes
This assignment supports Fitter wildcards.
Syntax
set_instance_assignment -name DDIO_OUTPUT_REGISTER -to <to> -entity <entity
name> <value>
MNL-Q21005
2015.05.04
DDIO_OUTPUT_REGISTER 493
Quartus Settings File Reference Manual Altera Corporation
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