Lenovo PC 300PL Technical Information Manual 6562, 6592 - Page 30

Chapter 2. System Board Features Ethernet The system board of PC 300PL computers contains an Intel 82557 10/100 Mbit Ethernet controller that provides a high-performance network connection. The Ethernet controller, which is a Plug and Play device and a PCI 2.1 Bus Master, features the following: IEEE 802.3 compliance, 10 and 100 Mbps Support for 100BaseTx and 10BaseT with PCI bus interface Viewable media access control (MAC) address Single RJ-45 port 3 Kbyte transmit FIFO and 3 Kbyte receive FIFO Auto-negotiation Full duplex capability Full NOS support The Ethernet controller interfaces directly with the ICS 1890 Tx physical layer on the system board, which contains all of the analog transmit and receive circuits. The system board also includes a discrete Wake on LAN controller (MagPack). This controller can be disabled in the Configuration/Setup Utility program. A switch is provided on the system board for disconnecting the Ethernet subsystem from AUX5 power. This disconnection is required if a Wake on LAN adapter is installed. (The power supply does not provide enough AUX5 current to power both the system board Ethernet and a Wake on LAN adapter simultaneously.) Note: For compliance with FCC Class B radiation limits, all Ethernet cabling attached to PC 300PL computers must be Class 5, regardless of the speed (10 Mbit or 100 Mbit). The following table shows the system resource assignments for the Ethernet controller. Table 9. System Resource Assignments for the Ethernet Controller Resource Resource Assignment ROM None RAM None I/O Address (Hex) Required5 IRQ Required5 DMA None When the computer is started, the resource assignments are subject to change during POST. The external interface for the Ethernet feature is an 8-pin, RJ-45 connector. For information on connector pin assignments, see "Ethernet Connector" on page 49. 5 Assigned by Plug and Play BIOS or operating system. 18 Technical Information Manual