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Altera_Forum
Honored Contributor
16 years agoPlease check if the pll_locked signal de-assertion when you assert pll_powerdown? There is one issue on Arria II GX's pll_locked signal which is similar to Stratix IV device. Refer to Stratix IV errata for the workaround(www.altera.com/literature/es/es_stratixiv_gx.pdf )