[En-Nut-Discussion] CS8900 Ethernet controller

Maurizio Gori mau.gori at katamail.com
Fri May 6 10:07:42 CEST 2005

Thanks Ole,
I have decided I do not want to get the risks and spend the work time to 
adapt the Ethernet driver to the CS8900. Therefore I'm using the RTL, at 
least for the first release of the CPU board.
For the future, if there will be some supplying troubles, I will send you a 
drawing and ask to check if the CS8900 interface is OK.

Thanks again,
----- Original Message ----- 
From: "Ole Reinhardt" <ole.reinhardt at kernelconcepts.de>
To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
Sent: Wednesday, May 04, 2005 5:06 PM
Subject: Re: [En-Nut-Discussion] CS8900 Ethernet controller

> Hi,
>> I am trying to develop an ATMega128 CPU Hardware running Ethernut. Can I 
>> use
>> the CS8900 Ethernet Controller instead of RTL8019?
>> I have seen that NUTCONF gives this possibility, but is it really 
>> working?
>> If yes, could someone suggest a HW/SW reference design to me?
> I have made my own Board running NutOS with ATMega128, 32K ext RAM,
> CS8900 ethernet controller and SJA1000 CAN Bus controller.
> It's running quite stable. But I never used NUTCONF but compiled in my
> Source tree and made the necessary modifications in my include files.
> (include/cfg/mcan.h). The only disadvantage is that you need to use more
> waitstates and don't have interrupt support. Interrupt support is buggy
> in the 8 Bit mode of the CS8900, so you need to use polling.
> I could provide you a schematic if you'r willing to sign a NDA or we
> could make your board design as well...
> Bye,
> Ole Reinhardt
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