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MLAB_ADD_TIMING_CONSTRAINTS_FOR_MIXED_PORT_FEED_THROUGH_MODE_S

ETTING_DONT_CARE

Allows you to specify whether you want the TimeQuest Timing Analyzer to evaluate timing constraints

between the write and the read operation of the MLAB memory block. Performing a write and read

operation simultaneously at the same address might result in metastability because no timing constraints

between those operations exist by default. Turning on this option introduces timing constraints between

the write and read operation on the MLAB memory block and thereby avoids metastability issues;

however, turning on this option degrades the performance of the MLAB memory blocks. If your design

does not perform write and read operations simulataneously at the same address you do not need to set

this option.

Type

Boolean

Device Support

This setting can be used in projects targeting any Altera device family.

Notes

This assignment supports Fitter wildcards.

This assignment is included in the Fitter report.

This assignment supports synthesis wildcards.

Syntax

set_global_assignment -name

MLAB_ADD_TIMING_CONSTRAINTS_FOR_MIXED_PORT_FEED_THROUGH_MODE_SETTING_DONT_CARE -

entity <entity name> <value>

set_instance_assignment -name

MLAB_ADD_TIMING_CONSTRAINTS_FOR_MIXED_PORT_FEED_THROUGH_MODE_SETTING_DONT_CARE -to

<to> -entity <entity name> <value>

set_global_assignment -name

MLAB_ADD_TIMING_CONSTRAINTS_FOR_MIXED_PORT_FEED_THROUGH_MODE_SETTING_DONT_CARE

<value>

Default Value

Off

MNL-Q21005

2015.05.04

MLAB_ADD_TIMING_CONSTRAINTS_FOR_MIXED_PORT_FEED_THROUGH_MODE_SE

TTING_DONT_CARE

133

Quartus Settings File Reference Manual

Altera Corporation

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Altera Quartus II Settings File Manuale Utente Pagina 133