Altera ALTPLL (Phase-Locked Loop) IP Core Bedienungsanleitung PDF herunterladen (Seite 22)

Table 11: Programmable Bandwidth Support

Cyclone Series PLLFast PLLEnhanced PLLLeft_RightTop_BottomDevice Family

—YesYes——Arria GX

———Yes

(4)

—Arria II GX

———Yes

(4)

Yes

(4)

Stratix IV

———Yes

(4)

Yes

(4)

Stratix III

—YesYes——Stratix II

—YesYes——Stratix II GX

—NoYes——Stratix

—NoYes——Stratix GX

Yes

(4)

————Cyclone IV

Yes

(4)

————Cyclone III

No————Cyclone II

No————Cyclone

Advanced PLL Parameters

The ALTPLL parameter editor provides an option for you to generate output files using the ALTPLL advanced

parameters. Examples of advanced parameters are charge_pump_current, loop_filter_r, and

loop_filter_c. This option is supported in all Altera devices.

This option is intended for advanced users who know the exact details of their PLL configuration and for

users who understand the parameters well enough to set them optimally. The files generated are not intended

to be re-used by the ALTPLL parameter editor, because after the ALTPLL IP core output files are specified

using the advanced parameters, the Quartus II compiler cannot change them. For example, the compiler

cannot perform optimization. Thus, your design cannot benefit from improved algorithms to pick better

settings or to make changes to some settings that the ALTPLL parameter editor finds to be incompatible

with your design.

Advanced Parameter Settings

Altera recommends you not to use these parameters unless you are an advanced user.

(4)

This device family supports only Auto and preset values.

ALTPLL (Phase-Locked Loop) IP Core User Guide

Altera Corporation

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Advanced PLL Parameters

2014.08.18

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