23 Mar
2010
23 Mar
'10
4:11 p.m.
On Tue, 2010-03-23 at 15:50 +0100, w.wegner@astro-kom.de wrote:
Dear list,
I am trying to get ethernet to work on my custom MCF54455 board and having some trouble.
I have a DP83848J PHY connected in MII mode to each of the FEC0 and FEC1 ports (seperate MDIO connection). Both PHYs are set to address 0x0. *)
Are you sure this is what you want? From the data sheet:
Strapping PHY Address 0 puts the part into Isolate Mode.
When in the MII isolate mode, the DP83848J does not respond to packet data present at TXD[3:0], TX_EN inputs and presents a high impedance on the TX_CLK, RX_CLK, RX_DV, RX_ER, RXD[3:0], COL, and CRS outputs. When in Isolate mode, the DP83848J will continue to respond to all management transactions.
John