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Altera_Forum
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11 years ago

PLL Reconfiguration/Phase Problem

I'm using a Cyclone IV, Quartus 13.1.0, and have designed a reconfigurable PLL that can be programmed for one of four different output frequencies. There are two PLL outputs, FAST & SLOW, the SLOW o...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

if initial (pre-reconfig) phase shift for both FAST & SLOW is 0 degree, then whatever MNC counter you reconfigure, expected that you will get a 0 degree phase relationship after a RESET.

what is your initial settings and what did you reconfig? Perhaps i can help you further.