VIPER Technical Manual

Detailed hardware description

 

 

10/100BaseTX Ethernet

An SMSC LAN91C111 Ethernet controller provides a single 10/100BaseTX interface. The device provides an embedded PHY and MAC, and complies with the IEEE802.3u 10/100BaseTX and IEEE 802.3x full-duplex flow control specifications. Configuration data and MAC information are stored in an external 93C46 EEPROM.

The 10/100base-T magnetics are located on the VIPER. Connection to the VIPER Ethernet port is via header PL1. See PL1 – 10/100BaseTX Ethernet connector, page 87, for pin assignment, connector and mating connector details.

A second header PL2 provides the activity and link status LED signals. The output lines sink current when switched on therefore the anode of each LED should be connected to pins 1 and 3 of PL2 and the cathode to the appropriate status line.

The Link LED illuminates when a 10 or 100base-T link is made, and the activity LED illuminates when there is Tx or Rx activity.

Ethernet breakout board

Eurotech Ltd can provide an Ethernet breakout board with an RJ45 connector to interface to the VIPER Ethernet connectors PL1 and PL2. The Ethernet breakout board features brackets for panel mounting ease. The Ethernet breakout board allows easy connection between the VIPER and a 10/100base-T Ethernet connection:

PL1

PL2

PL3

The connectors on the following pages are shown in the same orientation as the picture above.

Connector

Function

PL1

10/100BaseTX Ethernet signals

PL2

Ethernet LEDs

PL3

RJ45 connector

 

 

Ethernet breakout PL1

Ethernet breakout PL2

Ethernet breakout PL3

© 2007 Eurotech Ltd Issue E

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