Electronics > Microcontrollers

Anyone used the Wiznet ethernet chips?

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nctnico:
I'm working on a new design which needs network connectivity. The chips from Wiznet which offload dealing with the low level stuff like TCP/IP, UDP, etc look appealing to me. Does anyone have experience with these chips? They seem available from Mouser en Digikey so people must be buying them.

asgard20032:
Arduino ethernet shield use them. But nowaday, when someone need ethernet, its far more easier/cheaper to use a mcu with an on board ethernet than to buy an extra chip. Look at pic32 and arm cortex, lot of part with ethernet.

nctnico:
I have been down that road before but the problem is in the TCP/IP stack. In my experience it does take ironing out bugs before the product is really stable. I'd like to avoid that for this project. Besides that the W5500 chip isn't that bad pricewise considering most controllers need an external phy and a microcontroller without ethernet (dealing with the rest of the application) can be extremely cheap.

lukier:
On the other hand you could fix critical (security) bugs in the network stack as a part of your in field firmware upgrade (i.e. upgrading uIP there).

This chip probably has the same issue that TCP/IP offload engines have - network stack is hardwired and if it has a bug then it becomes serious vulnerability that is impossible to fix.

JoeN:

--- Quote from: lukier on July 26, 2015, 12:25:19 am ---On the other hand you could fix critical (security) bugs in the network stack as a part of your in field firmware upgrade (i.e. upgrading uIP there).

This chip probably has the same issue that TCP/IP offload engines have - network stack is hardwired and if it has a bug then it becomes serious vulnerability that is impossible to fix.

--- End quote ---

Nothing is impossible to fix if your router can apply flexible filters.   O0

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