Compaq 850 manual Gnd Vdc, Smb Cs, Tx/Rx

Appendix K Compaq PCI 10/100 Ethernet Adapter

K.2 FUNCTIONAL DESCRIPTION

The Compaq PCI 10/100 NIC Adapter is based on the 3C905C Network Interface Controller supported by firmware in flash ROM (Figure K-2). The adapter can operate in half- or full-duplex modes and provide auto-negotiation of both mode and speed. Full-duplex operation follows the IEEE 802.3x flow control specification. Transmit and receive FIFOs of three kilobytes each reduce the chance of overrun while waiting for bus access. Each card includes an on-board 5/3.3 VDC regulator circuit and WOL connector in support of Wake-On-LAN functionality.

		WOL
	Conn.
	1	5 VDC Aux	5/3.3	3.3 VDC
		GND	VDC
	2
			Reg.
		WOL
	3
	SMBus
	Conn.SMB Data
	1	SMB CS-
	2
		SMB Clock
	3
		NC
	4
		32-Bit
				3C905C
PCI		PCI Bus
				Ethernet Controller
Connector
	AOL/SOS
		Conn.
	1	Event 1
		Event 2
	2
		Event 3
	3
		Event 4
	4
		Event 5
	5
		Event 6
	6
		MD Clock (SOS Present)
	7

RJ-45

Conn.

TX/RX	TX/RX	Speed
Mag.

Link/

Activity

BIOS

ROM

Figure K-2.Compaq PCI 10/100 Ethernet Adapter, Block diagram

Key features of these adapters include:

♦2-KB transmit and 2-KB receive FIFOs

♦32-bit DMA bus mastering

♦PCI ver. 2.2 compliant (PME- support)

♦10/100BASE-T half/full duplex (IEEE 802.3)

♦Supports both 100BASE-TX and 100BASE-T4

♦Nway 10/100 auto-negotiation support

♦Both APM and ACPI power management support

♦AOL/SOS interface for Remote Sense Alert support

♦D0-D3 power state wake event support

♦Boot ROM with PXE and RPL support

K-2Compaq Personal Computers

Original - December 2000