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Altera_Forum
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10 years ago

Can Cyclone V tranceiver REFCLK used as clock resource for general IO pins?

Hi, I am using Cyclone V. And right now there is 100MHz differential clock to connect to REFCLK in the transceiver part as clock source. Here I am just wondering whether this 100MHz REFCLK...
Altera_Forum's avatar
Altera_Forum
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10 years ago

By default, the CV transceiver refclk cannot be use to drive core user logic or general purpose IO. However, you can workaround by having transceiver PHY clocked by the refclk and then tap the refclk signal to core. Without the transceiver PHY in place, the design could not pass Fitter.