Article ID: 000073816 Content Type: Troubleshooting Last Reviewed: 04/11/2014

Is it safe to ignore incomplete I/O assignment warning messages in the Quartus II software for Active Parallel configuration pins?

Environment

BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

Yes, it is safe to ignore incomplete I/O assignment warning messages in the Quartus® II software, for dual purpose configuration pins that are used for Active Parallel (AP) configuration.

The current strength and slew rate assignments on these AP configuration pins should be left to default, but this will result in the generation of incomplete I/O assignment warning messages by the Quartus II software related to missing drive strength and slew rate assignments. 

Resolution

To prevent the warning messages being generated, use the following QSF assignment for the appropriate pins  :

set_instance_assignment -name  <parameter> DEFAULT -to <pin_name>

example :

set_instance_assignment -name CURRENT_STRENGTH_NEW DEFAULT -to flash_data[0]

Related Products

This article applies to 1 products

Cyclone® IV E FPGA

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