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Spartan 3E & ethernet PHY (LAN85C185)

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drdileep12

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Hi,
I am using spartan 3E and SMSC (lan83c185) when connected, default it shows 10Mbps connectivity. I am able to read & write PHY registers & configured to get 100Mbps connectivity. But i am not able to store those values permanently. When power down all registers has its previous values.
Please help me in this, to permanently store the values.


Thanks
 

I don't think the SMSC part has nonvolatile storage. Check the SMSC datsheet first, usually there are "strapping resistors" to set the mode you want at boot depending on whether pins have pull ups/downs on them. Otherwise either you'll need a configuration eeprom for it (if the part supports it) or else the fpga will need to write the config registers every time after a reset.
 

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