VIPER
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
, 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
Arcom 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. It is shown below:
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
© 2004 Arcom Issue H
43
