ALTPLL (Phase-Locked Loop) IP Core User Guide

ID 683732
Date 6/16/2017
Public
Document Table of Contents

Parameter Settings

To enable the dynamic reconfiguration feature for Stratix and Stratix GX devices, use the parameter settings located on the Scan/Input/Lock page of the ALTPLL parameter editor.

The following figure shows the dynamic reconfiguration options using scan chains.

Figure 16. Dynamic Reconfiguration Options for Stratix and Stratix GX Devices


The following table lists the dynamic reconfiguration options using scan chains.

Table 12.  Dynamic Reconfiguration Options for Stratix and Stratix GX Devices

Option

Description

Create optional inputs for dynamic reconfiguration

This option enables all the PLL reconfiguration ports for this instantiation—scanclk, scanaclr, scandata, and scandataout.

Which scan chain type will you be using?

This option lets you specify the following types of scan chain to be used in the PLL reconfiguration:

  • Long chain—Specifies that you are using PLLs 5 and 6 with PLL reconfiguration. PLLs 5 and 6 have six logic array outputs and four external clock outputs and therefore, have a longer reconfiguration chain.
  • Short chain—Specifies that you are using PLLs 11 and 12 with PLL reconfiguration. PLLs 11 and 12 have only six logic array outputs with no dedicated external clock output counters and are considered the shorter reconfiguration chain PLLs.

For devices that use the normal dynamic reconfiguration scheme, the parameter settings are located on the PLL Reconfiguration page of the ALTPLL parameter editor.

The following figure shows the normal dynamic configuration scheme options that uses configuration files.

Figure 17. Dynamic Reconfiguration Options Using Configuration Files


The following table lists the normal dynamic reconfiguration scheme options.

Table 13.  Normal Dynamic Reconfiguration Options and Descriptions

Option

Description

Create optional inputs for dynamic reconfiguration

This option enables all the PLL reconfiguration ports for this instantiation—scanclk, scanaclr, scandata, scandone, and scandataout.

Initial Configuration File

Specify the location of the configuration file that is used to initialize the ALTPLL_RECONFIG IP core.

Additional Configuration File(s)

Specify additional configuration file. This file might contain additional settings for the PLL, or might be used to initialize the ALTPLL_RECONFIG IP core.