Ampro Corporation XTX 820 manual Ethernet Port Interface, Tx+, Liled, Actled, Spdled

Chapter 3 Hardware

Ethernet Port Interface

The Ethernet solution is provided by integrating the functions of I/O Hub (82801FBM) and the Intel 82562GZ Fast Ethernet PCI controller chip together. The Intel 82562GZ chip provides the physical layer (PHY) and the I/O Hub provides the Media Access Controller (MAC).

•Routed to J4 connector

•Supports full duplex or half-duplex operation

•Supports full duplex operation at 10 Mbps and 100 Mbps

•Provides IEEE 802.3 10BaseT/100BaseT compatible physical layer and LAN connect interface

•Supports IEEE 802.3u Auto-Negotiation

•Supports IEEE 802.3x 100BASE-TX flow control

•Provides 10Base-T auto-polarity correction

•Provides PHY detection of polarity, MDI-X, and cable lengths

•Supports Auto MDI, MDIX crossover at all speeds

•Provides Digital Adaptive Equalization control

•Provides Link Status interrupt capability and XOR tree mode support

•Supports 3-port LEDs (speed, link, and activity)

•Supports diagnostic loopback mode

•Provides low power at 3.3 V (less than 300 mW in active transmit mode)

•Reduced power in "unplugged mode" (less than 50 mW)

•Provides automatic detection of "unplugged mode"

•Baseboard must provide the Ethernet RJ-45 connector and the magnetics

Table 3-25. Simplified Ethernet Port Pin/Signal Descriptions (J4)

J4	Signal	Description
Pin #
97	TX+	Analog Twisted Pair Ethernet Transmit Differential Pair – These pins
		transmit the serial bit stream to the baseboard as differential signals.
95	TX-
93	RX	Analog Twisted Pair Ethernet Receive Differential Pair – These pins
		receive the serial bit stream from the baseboard as differential signals.
91	RX-
	GND	Ground
10	LILED	Link Integrity LED – The LINK LED pin indicates link integrity. If the
		link is valid in either 10 or 100 Mbps, the LED is on; if the link is
		invalid, the LED is off.
12	ACTLED	Activity LED – The Activity LED pin indicates either transmit or receive
		activity. When activity is present, the activity LED is on; when no
		activity is present, the activity LED is off.
14	SPDLED	Speed LED – The speed LED pin indicates the speed. The speed LED
		will be on at 100 Mbps and off at 10 Mbps.

Note: The shaded area denotes power or ground.

48 Reference Manual XTX 820