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Quartus II Settings File Reference Manual - Altera

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6–182 Chapter 6: Fitter Assignments<br />

IO_MAXIMUM_TOGGLE_RATE<br />

IO_MAXIMUM_TOGGLE_RATE<br />

Type<br />

Specifies the toggle rate of this node. You can specify the desired frequency setting.<br />

This option is ignored if it is applied to anything other than pins. This option can be<br />

used to direct the Fitter in its toggle-rate checking while allowing a single-ended pin<br />

to be placed closer to a differential pin. This assignment is used to analyze signal<br />

integrity under worst case conditions (highest possible toggle rate). A different<br />

assignment, Power Toggle Rate, is used to specify the expected time-averaged toggle<br />

rate rather than worst-case toggle rate, and is used by the Power Analyzer to estimate<br />

time-averaged power consumption. Use the Synchronizer Toggle Rate if you want to<br />

configure the data rates used for Metastability Reporting in the TimeQuest timing<br />

analyzer.<br />

Frequency<br />

Device Support<br />

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

■ Arria GX<br />

■ Arria <strong>II</strong> GX<br />

■ Arria <strong>II</strong> GZ<br />

■ Arria V<br />

■ Cyclone<br />

■ Cyclone <strong>II</strong><br />

■ Cyclone <strong>II</strong>I<br />

■ Cyclone <strong>II</strong>I LS<br />

■ Cyclone IV E<br />

■ Cyclone IV GX<br />

■ Cyclone V<br />

■ HardCopy <strong>II</strong><br />

■ HardCopy <strong>II</strong>I<br />

■ HardCopy IV<br />

■ MAX <strong>II</strong><br />

■ MAX V<br />

■ Stratix<br />

■ Stratix GX<br />

■ Stratix <strong>II</strong><br />

■ Stratix <strong>II</strong> GX<br />

■ Stratix <strong>II</strong>I<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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