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Altera_Forum
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13 years ago

Cyclone III PLL not locking after reconfig

I'm using dynamic reconfiguration to change frequencies of a Cyclone PLL. I'm using the ALTPLLRECONFIG and ALTPLL IPs. When I load the new parameters and send configupdate I lose lock as expecte...
Altera_Forum's avatar
Altera_Forum
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12 years ago

This can happen on stratix 3 FPGA when the re programmed frequency is too low (Like 5 MHz with an input of 20 MHz).