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Altera_Forum
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21 years ago

Problem with Altera timing model for LAN91C111?

Hello, I am developing on a system that is very similar to the Nios II evaluation kit. I am trying to transfer data to and from the LAN91C111 Ethernet MAC but have noticed some problems. The MA...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

I came across the issue a while back when I was adding a DMA in to the flow. The problem I saw was that the Lan ship asked for wait states and the driver did not used the ardy signal.

I opened a ticket back in march and it is supposed to be addressed in either 5.0 or the first bug fix. There solution was to slow down the access and still not use the ardy signal.