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Quartus II Settings File Reference Manual - Altera

Quartus II Settings File Reference Manual - Altera

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Chapter 6: Fitter Assignments 6–215<br />

OPTIMIZE_IOC_REGISTER_PLACEMENT_FOR_TIMING<br />

OPTIMIZE_IOC_REGISTER_PLACEMENT_FOR_TIMING<br />

Type<br />

Controls whether the Fitter optimizes I/O pin timing by automatically packing<br />

registers into I/Os to minimize I/O -> register and register -> I/O delays. If you<br />

enable the Normal option, the Fitter opportunistically packs registers into I/Os that<br />

should improve I/O timing. If you enable the Pack All I/O Registers, the Fitter<br />

aggressively tries to pack any registers connected to input, output or output enable<br />

pins into I/Os unless prevented by user constraints or other legality restrictions. By<br />

default, this option is set to Normal. This option requires the Optimize Timing option<br />

to be enabled for it to work.<br />

Enumeration<br />

■ Normal<br />

■ Off<br />

Device Support<br />

■ Pack All IO Registers<br />

This setting can be used in projects targeting any <strong>Altera</strong> device family.<br />

Notes<br />

This assignment is included in the Fitter report.<br />

Syntax<br />

set_global_assignment -name OPTIMIZE_IOC_REGISTER_PLACEMENT_FOR_TIMING<br />

<br />

Default Value<br />

Normal<br />

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

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

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