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Quartus II Settings File Reference Manual - Altera

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6–280 Chapter 6: Fitter Assignments<br />

PR_ERROR_OPEN_DRAIN<br />

PR_ERROR_OPEN_DRAIN<br />

Type<br />

Specifies whether the Open-Drain feature on the PR_ERROR pin should be enabled or<br />

not.<br />

Using this feature decouples the voltage level of the PR_ERROR pin from V CCIO.<br />

You must connect a pull-up resistor to the pin when this feature is enabled.<br />

Boolean<br />

Device Support<br />

This setting can be used in projects targeting the following device families:<br />

■ Arria V<br />

■ Cyclone V<br />

■ Stratix V<br />

Syntax<br />

set_global_assignment -name PR_ERROR_OPEN_DRAIN <br />

Example<br />

set_global_assignment -name pr_error_open_drain on<br />

set_global_assignment -name pr_error_open_drain off<br />

Default Value<br />

On<br />

See Also<br />

■ “ENABLE_PR_PINS” on page 6–113<br />

<strong>Quartus</strong> <strong>Settings</strong> <strong>File</strong> June 2012 <strong>Altera</strong> Corporation<br />

<strong>Reference</strong> <strong>Manual</strong>

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