>
> Just to point out that between the MAC and the transformer/cable goes
> the PHY.
> The MAC is usually embedded into the CPU
Only in embedded applications.

In the PC world afaict it's more common to see MAC+PHY combined and then
connected to the system via PCI/PCIe.

The panda, beaglexm and Pi all use chips from SMSC (LAN9512/LAN9514)
that combine a USB hub, USB based ethernet MAC and ethernet PHY into one
chip.
> , and the PHY is an external chip.
> There are a few MCUs that also have the PHY embedded, but they are very
> rare.
Yeah, I guess the processes that are well suited to doing the ethernet=20
physical
layer aren't suited to high speed processors.
--=20
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