Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook
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4.1.5.4. PCLK Control Block
PCLK control block drives both SPCLK and LPCLK networks.
To drive the HSSI PCLK, select the HSSI output, fPLL output, or clock input pin.
To drive the I/O PCLK, select the DPA clock output, I/O PLL output, or clock input pin.
You can set the input clock sources and the clkena signals for the PCLK networks through the Quartus® Prime Pro Edition software using the ALTCLKCTRL IP core.