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VIPER Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue E 62
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:
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
PL1
PL2
PL3