GEMINI user manual
Issue D
44
LAN interface
The GEMINI provides four Intel 82573L LAN interfaces which support the triple speed of
10/100/1000Base-T, with IEEE802.3 compliance and Wake-On-LAN capability.
Two LEDs on each RJ-45 port provide information about its operation, as follows:
•
The dual colour (green/orange) LED on the left (as you look at the connector)
shows you the speed the port is currently operating at.
•
The yellow LED on the right (as you look at the connector) shows you whether the
connector is currently linked to the network, and indicates when activity takes place
via that link, i.e. when data is passing through.
The information provided by each LED is explained in the following table:
Left LED (speed)
Right LED (link/activity)
Orange: 1000Mb/s
Green: 100Mb/s
Off: 10Mb/s
Yellow: Link connected
Flashes: Activity is taking place
Serial ports
The GEMINI provides four high speed 16C550 compatible UARTs, two via the
W83627THG SuperIO and a further two via the PCI based UART Fintek F81216D.
COM1 and COM2 are interfaced via the SuperIO. COM1 can only be used as standard
RS232 serial interface but COM2 is selectable between RS232, RS422, RS485 and IrDA
operation.
COM3 and COM4 are interfaced via the PCI UART F81216D and provide standard
RS232 serial interfaces.
Super IO
An Winbond W83627THG Super IO controller provides legacy IO support. The SuperIO
resides on the LPC bus and provides:
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Two serial ports.
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Keyboard and mouse PS/2 interface.
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Parallel port.
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Floppy drive.
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IrDA.
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Hardware monitor.
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Watchdog.
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General purpose IOs.
