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FVanE1
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6 years ago

Why is the GTX clock output of the HPS running at 250 MHz?

We have an Arria 10 FPGA with ARM processor. In Platform Designer one of the EMACs is routed to the FPGA logic. We do not route the GMII Tx data and GTX clock directly from FPGA logic to a PHY, but w...
FVanE1's avatar
FVanE1
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5 years ago

A change in the EMAC 1 clock frequency (tab "HPS Clocks and reset, Internal Clocks and Output Clocks") is reflected in the hps.xml file. However, the tooling will give a warning: Warning: system_sd.arria10_hps_0: EMAC1 is in GMII/RGMII mode but has a 50MHz clock. 250MHz Clock is recommended. The result remains the same: gtx clock has a frequency of 250 MHz.