[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Some thoughts on ethernet.c
> According to the IEEE Std 802.3, the PHY should output its data in
> response to the positive edge of mdc, with a maximum delay of 300 ns.
Actually, yes. Our LSI Logic datasheet shows a clock so fast that it's
leading the data output by nearly 180 degrees ;)
> I could not say. Is there something in between the ETRAX 100LX and the PHY
> that adds delay ?
Yes, the resistors I mentioned, slightly too large.
Jarkko Tuomi email@example.com/~jtuomi/">http://www.hut.fi/~jtuomi/