advantages of ethernet MAC ip core

Jan Panteltje wrote:

(snip)

> I have also build that little differential amp from fpga-fun site.
> Not all working yet (no time).
> I have not looked up the 100BASE-T spec yet, but 3 voltage levels can
> be done using 2 banks with 2 different references?
> For a 100MHz transformer, remember those 300Ohm to 75 coax VHF
> transformers?
> Every old TV had one, just a ferrite core with 3 or 4 turns...
> But my ethernet card was only 5.80 Euro, (6 $), there is a small
> transformer on it.
> So for 6 $ you have a transformer.
> Dunno how they can make these cards for that price.

There should be a DIP package near the RJ45 jack, which is
three little ferrite transformers in one package.  About like
the TV ones, only even smaller.

-- glen

Didn't you mean this OpenCores project?

http://www.opencores.org/projects/ethmac/

It is an Ethernet MAC using the MII interface to connect to every PHY you want!
I used the core in Altera FPGAs and have had no problems with it.

Regards,
Marc

e-mail: Marc dot Colling at MaCo-Engineering dot de


"John Retta" <jretta@rtc-inc.com> wrote in message news:<N2QDb.7879$0s2.2125@newsread2.news.pas.earthlink.net>...
> That is correct.  No Phy.  My mistake in original email.
> 
> -- 
> Regards,
> John Retta
> 
> email : jretta@rtc-inc.com
> web :  www.rtc-inc.com
> 
> 
> "Mike Treseler" <mike.treseler@flukenetworks.com> wrote in message
> news:3FDF7EEB.7060509@flukenetworks.com...
> > John Retta wrote:
> > > You can remove the cost variable from the equation.
> > > Check www.opencores.org.  They offer open source code
> > > for numerous cores, including a MAC PHY
> >
> > I found the MAC, but the only PHY listed is for USB.
> >
> >
> >    -- Mike Treseler
> >

Hi,
"Marc" <damc4@gmx.de> wrote in message
news:cf0ec8fc.0312210240.54c85860@posting.google.com...
> Didn't you mean this OpenCores project?
>
> http://www.opencores.org/projects/ethmac/
>
> It is an Ethernet MAC using the MII interface to connect to every PHY you
want!
> I used the core in Altera FPGAs and have had no problems with it.

Which PHY did you use?
I have LAN91C111 but don't know whether it can be used only as the PHY!?

Regards

>
> Regards,
> Marc
>
> e-mail: Marc dot Colling at MaCo-Engineering dot de
>
>
> "John Retta" <jretta@rtc-inc.com> wrote in message
news:<N2QDb.7879$0s2.2125@newsread2.news.pas.earthlink.net>...
> > That is correct.  No Phy.  My mistake in original email.
> >
> > --
> > Regards,
> > John Retta
> >
> > email : jretta@rtc-inc.com
> > web :  www.rtc-inc.com
> >
> >
> > "Mike Treseler" <mike.treseler@flukenetworks.com> wrote in message
> > news:3FDF7EEB.7060509@flukenetworks.com...
> > > John Retta wrote:
> > > > You can remove the cost variable from the equation.
> > > > Check www.opencores.org.  They offer open source code
> > > > for numerous cores, including a MAC PHY
> > >
> > > I found the MAC, but the only PHY listed is for USB.
> > >
> > >
> > >    -- Mike Treseler
> > >

Hi John,

the LAN91C111 has an external MII interface and it seems to be
possible to disable the internal PHY (and use this MII for an external
PHY). If it works also the other way round I have no idea, never tried
it.

I used the folowing PHYs together with the OpenCores MAC: Broadcom
BCM5201, AMD AM79C874 NetPHY, National Semi DP83865.

What kind of hardware do you use?

Regards,
 Marc

e-mail: Marc dot Colling at MaCo-Engineering dot de



"John" <305liuzg@163.net> wrote in message news:<bsm116$n39$1@mail.cn99.com>...
> Hi,
> "Marc" <damc4@gmx.de> wrote in message
> news:cf0ec8fc.0312210240.54c85860@posting.google.com...
> > Didn't you mean this OpenCores project?
> >
> > http://www.opencores.org/projects/ethmac/
> >
> > It is an Ethernet MAC using the MII interface to connect to every PHY you
>  want!
> > I used the core in Altera FPGAs and have had no problems with it.
> 
> Which PHY did you use?
> I have LAN91C111 but don't know whether it can be used only as the PHY!?
> 
> Regards
> 
> >
> > Regards,
> > Marc
> >
> > e-mail: Marc dot Colling at MaCo-Engineering dot de
> >
> >
> > "John Retta" <jretta@rtc-inc.com> wrote in message
>  news:<N2QDb.7879$0s2.2125@newsread2.news.pas.earthlink.net>...
> > > That is correct.  No Phy.  My mistake in original email.
> > >
> > > --
> > > Regards,
> > > John Retta
> > >
> > > email : jretta@rtc-inc.com
> > > web :  www.rtc-inc.com
> > >
> > >
> > > "Mike Treseler" <mike.treseler@flukenetworks.com> wrote in message
> > > news:3FDF7EEB.7060509@flukenetworks.com...
> > > > John Retta wrote:
> > > > > You can remove the cost variable from the equation.
> > > > > Check www.opencores.org.  They offer open source code
> > > > > for numerous cores, including a MAC PHY
> > > >
> > > > I found the MAC, but the only PHY listed is for USB.
> > > >
> > > >
> > > >    -- Mike Treseler
> > > >

Hi
I am working with Altera Nios Kit with LAN91C111!
Regards

"Marc" <damc4@gmx.de> wrote in message
news:cf0ec8fc.0312280334.409afc93@posting.google.com...
> Hi John,
>
> the LAN91C111 has an external MII interface and it seems to be
> possible to disable the internal PHY (and use this MII for an external
> PHY). If it works also the other way round I have no idea, never tried
> it.
>
> I used the folowing PHYs MAC: Broatogether with the OpenCores dcom
> BCM5201, AMD AM79C874 NetPHY, National Semi DP83865.
>
> What kind of hardware do you use?
>
> Regards,
>  Marc
>
> e-mail: Marc dot Colling at MaCo-Engineering dot de
>
>
>
> "John" <305liuzg@163.net> wrote in message
news:<bsm116$n39$1@mail.cn99.com>...
> > Hi,
> > "Marc" <damc4@gmx.de> wrote in message
> > news:cf0ec8fc.0312210240.54c85860@posting.google.com...
> > > Didn't you mean this OpenCores project?
> > >
> > > http://www.opencores.org/projects/ethmac/
> > >
> > > It is an Ethernet MAC using the MII interface to connect to every PHY
you
> >  want!
> > > I used the core in Altera FPGAs and have had no problems with it.
> >
> > Which PHY did you use?
> > I have LAN91C111 but don't know whether it can be used only as the PHY!?
> >
> > Regards
> >
> > >
> > > Regards,
> > > Marc
> > >
> > > e-mail: Marc dot Colling at MaCo-Engineering dot de
> > >
> > >
> > > "John Retta" <jretta@rtc-inc.com> wrote in message
> >  news:<N2QDb.7879$0s2.2125@newsread2.news.pas.earthlink.net>...
> > > > That is correct.  No Phy.  My mistake in original email.
> > > >
> > > > --
> > > > Regards,
> > > > John Retta
> > > >
> > > > email : jretta@rtc-inc.com
> > > > web :  www.rtc-inc.com
> > > >
> > > >
> > > > "Mike Treseler" <mike.treseler@flukenetworks.com> wrote in message
> > > > news:3FDF7EEB.7060509@flukenetworks.com...
> > > > > John Retta wrote:
> > > > > > You can remove the cost variable from the equation.
> > > > > > Check www.opencores.org.  They offer open source code
> > > > > > for numerous cores, including a MAC PHY
> > > > >
> > > > > I found the MAC, but the only PHY listed is for USB.
> > > > >
> > > > >
> > > > >    -- Mike Treseler
> > > > >