Why can the PLL not be instantiated when using PHY Lite for Parallel Interfaces Agilex™ 7 FPGA IP?

Description

Due to a problem in the Quartus® Prime Pro Edition Software version 23.1, the phase-locked loop (PLL) cannot be instantiated on the top sub-bank when using PHY Lite for Parallel Interfaces Agilex™ 7 FPGA IP.

Resolution

To work around this problem, the differential reference clock input can be instantiated in the bottom sub-bank at a pin index of 34-35 or 36-37.

While a single reference clock input can only be instantiated in the bottom sub-bank at a pin index of 34 or 36.

If you need to instantiate the reference clock input in the top sub-bank, you have to add the following assignment to the Quartus® Prime Pro Edition Software Settings File ( .qsf):

• set_intance_assignment -name PLL_REFCLK_INPUT_TYPE NOT_BALANCED -to *arch_inst|phylite_clocking_inst|iopll_inst

This problem is fixed starting with the Quartus® Prime Pro Edition Software version 23.2.