Lynx EPM-4 manual Ethernet Interface, Green LED Link / Activity, Yellow LED Speed

Ethernet Interface

Ethernet Interface

The EPM-4 features an industry-standard 10baseT / 100baseTX Ethernet interface based on the Intel 82551ER Ethernet controller. This PCI based interface chip is widely supported. Drivers are readily available to support a variety of operating systems such as QNX, VxWorks and other RTOS vendors.

BIOS CONFIGURATION

The Ethernet interface shares PC/104-Plusinterrupt “INTC”. The CMOS Setup screen is used to select the IRQ line routed to INTC*.

STATUS LED

Two colored LEDs (D1) located next to the RJ-45 connector provide an indication of the Ethernet status as follows:

Green LED (Link / Activity)
•	ON	Active Ethernet cable plugged into J4.
		No Tx/Rx data activity.
•	OFF	Cable not plugged into J4
		Cable not plugged into active hub
•	BLINKING	Active Ethernet cable plugged into J4.
		Tx or Rx data activity detected on the cable
Yellow LED (Speed)
•	ON	100baseTx (Fast) detected on Ethernet cable.
•	OFF	10BaseTx (Slow) detected on Ethernet cable.

ETHERNET CONNECTOR

Aboard-mounted RJ-45 connector is provided to make connection with category 5 Ethernet cable. The Ethernet controller will autodetect 10BaseT/100BaseTX connections.

Table 7: RJ45 Ethernet Connector

J4	Signal
Pin	Name	Function
4	IGND	Isolated Ground
5	IGND	Isolated Ground
6	R–	Receive Data –
3	R+	Receive Data +
7	IGND	Isolated Ground
8	IGND	Isolated Ground
2	T–	Transmit Data –
1	T+	Transmit Data +

This device is protected against ESD damage by IEC 61000-4-2 rated transient voltage suppressor components.

Reference – 32 EPM-4 Reference Manual