Ethernet, Ethernet host, Ions – Eurotech Appliances ZEUS PXA270 User Manual

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ZEUS Technical Manual

Detailed hardware description

Ethernet

The ZEUS SBC provides two 10/100-BaseTX interfaces with MAC and complies with

both the IEEE802.3u 10/100-BaseTX and the IEEE 802.3x full-duplex flow control

specifications.

Two single 10/100-BaseTX Ethernet controllers, Davicom DM9000A, are used to

implement Ethernet interfaces on ZEUS. DM9000A device provides an embedded PHY

and MAC and connects to 10/100-BaseTX magnetics. DM9000A also supports AUTO-

MDIX feature. Configuration data and MAC information are stored in an external serial

EEPROM (93LC46).

The DM9000A devices are connected to the PXA270 data bus (16-bit), and are

memory mapped. Connection to the ZEUS Ethernet ports is via dual RJ45 connector,

J6, with speed and link/activity status LEDs. For pin assignment and connector details,

, page

The link/activity LED (yellow) is illuminated when a 10/100-BaseTX link is made, and

when there is Tx/Rx activity. The speed LED (green) is illuminated when 100MB/s

speed is selected.