adjust_pll_refclk (::quartus::eco)
The following table displays information for the adjust_pll_refclk Tcl command:
Tcl Package and Version |
Belongs to ::quartus::eco 1.0 |
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Syntax | adjust_pll_refclk [-h | -help] [-long_help] -refclk <refclk_freq> -to <iopll_name> | |||
Arguments | -h | -help | Short help | ||
-long_help | Long help with examples and possible return values | |||
-refclk <refclk_freq> | New refclk frequency value in MHz | |||
-to <iopll_name> | Instance name of upstream IOPLL to be adjusted | |||
Description |
The adjust_pll_refclk command can change IOPLL frequencies by modifying the input reference clock frequency. Assumptions and Limitations: - The original refclk/outclk ratios will be maintained - None of the IOPLLs being reconfigured can generate IP clocks (the frequencies of the LVDS, PhyLite and EMIF clocks cannot change) - Cascaded IOPLLs must be connected directly (no clock gates in between them) - IOPLLs cannot be in 'nondedicated' compensation modes - For all IOPLL outclks duty cycle = 50 and phase shift = 0 |
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Example Usage |
load_package eco adjust_pll_refclk -to "*pll_main*" -refclk 100 |
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Return Value | Code Name | Code | String Return | |
TCL_OK | 0 | INFO: Operation successful |