MII Interface Connections

Serial Servers & Infrastructure Mangement Portserver TS
1

I’m trying to interface the National Semiconductor DP83640 chip to the MII bus of the Digi 9P 9215. Does the MII bus come out of the connectors X1 and X2? If so, can you identify them? They should be equivalent to:

TX_CLK
TXD[3:0]
TX_EN
MDIO
MDC
COL
CRS
RX_ER
RX_DV
rxd[3:0]
RX_CLK

2

Hello KLyon,

unfortunately, the MII signals are not available at the X1/X2 connectors. As Digi has populated an Ethernet-PHY on the module itself, there seemed to be no need for these signals.

Kind regards,

Christopher