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Quartus II Settings File Reference Manual - Altera

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6–296 Chapter 6: Fitter Assignments<br />

RESERVE_FLASH_NCE_AFTER_CONFIGURATION<br />

RESERVE_FLASH_NCE_AFTER_CONFIGURATION<br />

Type<br />

Specifies how the FLASH_nCE/nCSO pin should be used when the device is<br />

operating in user mode after configuration is complete. Depending on the current<br />

device and configuration scheme, this pin can be reserved as a regular I/O pin, as an<br />

input that is tri-stated, as an output that drives ground, as an output that drives an<br />

unspecified signal, or compiler configured. If the FLASH_nCE/nCSO pin is reserved<br />

as a regular I/O pin, the FLASH_nCE/nCSO pin can be used as an ordinary I/O pin<br />

after configuration. If the FLASH_nCE/nCSO pin is only used to interface with<br />

external memory for configuration, the FLASH_nCE/nCSO pin should be reserved as<br />

compiler configured.<br />

Enumeration<br />

Device Support<br />

■ As input tri-stated<br />

■ As output driving an unspecified signal<br />

■ As output driving ground<br />

■ Compiler configured<br />

■ Use as regular IO<br />

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

■ Cyclone <strong>II</strong>I<br />

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

■ Cyclone IV E<br />

■ Cyclone IV GX<br />

Syntax<br />

set_global_assignment -name RESERVE_FLASH_NCE_AFTER_CONFIGURATION <br />

Example<br />

set_global_assignment -name RESERVE_FLASH_NCE_AFTER_CONFIGURATION "USE AS<br />

REGULAR IO"<br />

Default Value<br />

As input tri-stated<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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