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Quartus II Settings File Reference Manual - Altera

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4–58 Chapter 4: Analysis & Synthesis Assignments<br />

DQS_SHIFT<br />

DQS_SHIFT<br />

Type<br />

Specifies the interval of arrival between the DQ data signals and DQS signal during<br />

data transfer between a device and an external RAM that uses DDR. This option is<br />

ignored if it is applied to anything other than pins intended for use with the dedicated<br />

DDR SDRAM interface.<br />

Enumeration<br />

Device Support<br />

■ Phase of 0 degrees<br />

■ Phase of 72 degrees<br />

■ Phase of 90 degrees<br />

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

■ Stratix<br />

■ Stratix GX<br />

Syntax<br />

set_instance_assignment -name DQS_SHIFT -to -entity <br />

<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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