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Altera Corporation User Guide Version 11.1 A–1

October 2011

Appendix A. Using PCI

Constraint File Tcl Scripts

Introduction

Altera provides constraint files, in the form of Tool Command Language

(Tcl) scripts, to meet PCI timing requirements in the Quartus II software.

The PCI Compiler v11.1 generates a constraint file for your target device

family.

f For a list of supported device families and the level of support offered

for each family, refer to “About PCI Compiler”.

PCI Constraint

Files

PCI constraint files make the following assignments in your Quartus II

project:

■ PCI pin location assignments

■ PCI I/O voltage assignments

■ PCI clamp diode assignments

■ PCI timing assignments

■ Logic option assignments for clk, rstn, irdyn, and trdyn pins

■ Logic option assignments for the PCI MegaCore function variation

■ LogicLock assignments in designs targeting Cyclone devices

■ Programmable ground assignments in designs targeting MAX II

devices (For more information, refer to “Simultaneous Switching

Noise (SSN) Considerations” on page A–2)

When run, the constraint file automatically extracts the PCI MegaCore

function, PCI MegaCore function hierarchy, device family, density and

package type used in your Quartus II project, and makes PCI assignments

for your project based on this information.

To use a PCI constraint file, perform the following steps:

1. Open your project in the Quartus II software.

2. Ensure that you have specified a device family, density and package

in your Quartus II project.

3. In the Quartus II software, choose Tc l C o ns o l e (View > Utility

Windows menu).

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Altera PCI Compiler Manual do Utilizador Página 347