Marvell 88E1111 PHY on DE2-115

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We wanted to learn *VHDL*, no cores

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In that case, start with something that you can get the whole data sheet to, eg., an asynchronous SRAM or Flash interface, an SSRAM interface, an SDRAM controller, etc. Marvell is a pain to get datasheets from.

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Thanks for the tip about signaltapping into an existing design btw!

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Its also very useful to trying to understand what an Altera IP core does in hardware. Sometimes the documentation can be a little 'light' on details.

Cheers,

Dave