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Altera_Forum
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17 years ago

RMII Mode Selection / Strapping CYCLONE III

Hi, I am working in ALTERA CYCLONE III . I have designed a module with the following NIOS II Processor + Custom Ethernet MAC working in RMII Mode + SSRAM. The Ethernet PHY used in this FPGA i...
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Altera_Forum
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17 years ago

The information is on page 9 of the datasheet (http://www.altera.com/literature/hb/cyc3/cyc3_ciii52001.pdf).

If no footprint is available on the PCB to put the pull-up it may be tricky to add. See if you can access the PHY pin or a via connected to the signal.

It may be easier to adapt your design to MII instead of RMII.