Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

How to force de2-115 to work at 100mbps Ethernet

Hi, We are trying to implement an Ethernet MAC sublayer of our own, according to the IEEE standard. We don't want to implement the whole standard, but only the portion that relates to 100Mbps...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

You basically have two ways:[list][*]The easy way: connect a 100MBps switch between your kit and its target

[*]The slightly harder way: write 0 to MDIO register 9 to disable gigabit capability advertising, and then set bit 9 of MDIO register 0 to 1 to trigger a new auto-negotiation. Both ends should then negotiate a 100Mbps link.[/list]

And please post your question only once.