Article ID: 000077211 Content Type: Troubleshooting Last Reviewed: 09/11/2012

What is pll_areset connected to in the ALTGX megafunction for Cyclone IV GX devices in Quartus II software version 10.0 and 10.0sp1?

Environment

  • Cyclone® IV GX FPGA
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Description

The pll_areset port is unconnected in the ALTGX megafunction for Cyclone® IV GX devices in the Quartus® II software version 10.0 and 10.0sp1.  The pll_powerdown port is connected to the PLL areset port in this version.  Use pll_powerdown for pll_areset functions in version 10.0 and 10.0sp1 of the ALTGX megafunction.

 

A future release of the Quartus II software will remove the pll_powerdown port in place of the pll_areset port on the ALTGX megafunction.  Designs created in version 10.0 and 10.0sp1 will be backward compatible, the pll_powerdown port will still function as PLL areset.  New designs created after version 10.0sp1 will need to use pll_areset instead of pll_powerdown.

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