EmbeddedDNA ® PC/104 CPU Module An0038 CPU-1220; Ethernet Aapter Rev. 1.0 Apr 2004 COPYRIGHT 1994-2005 Eurotech S.p.A. All Rights Reserved.
Application Note ABOUT THIS MANUAL This application note is intended to help users detecting which Ethernet interface is installed over the CPU-1220. Via J. Linussio 1 33020 AMARO (UD) ITALY Phone: +39 0433 485 411 Fax: +39 0433 485 499 web: http://www.eurotech.it e-mail: mailto:sales@eurotech.it NOTICE Although all the information contained herein has been carefully verified, Eurotech S.p.A.
Application Note 3 Conventions The following table lists conventions used throughout this guide.
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Contents Conventions ................................................................................................................................................... 3 Contents ........................................................................................................................................................... 5 Chapter 1 CPU-1220 Ethernet interface ...................................................................................................
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Chapter 1 CPU-1220 Ethernet interface The CPU-1220 Ethernet interface features a single-chip Fast Ethernet controller Realtek RTL8139 that provides 32-bit performance, 10/100Mbps auto-sensing, and full compliance with IEEE 802.3u 100Base-T specifications and IEEE 802.3x Full Duplex Flow Control. The versions of the Relatek RTL8139 chipset installable over the CPU-1220 board are: - RTL8139 B RTL8139 C Between the two devices there are only different electrical characteristics.
Application Note Comparing the CPU-1220 serial number1 with the following table is possible to detect the installed chipset version: Table 1. CPU-1220 RTL8139 chipset version CPU-1220 Eurotech s/n Till S.N. 229904389 Starting from 03M241 S.N. 229904390 Realtek RTL8139 version B C Ethernet interface The CPU-1220 module provides the following interfaces: J4 for a 10/100 Ethernet (LAN) connection. J4 is a 5x2 pin – 2.
Application Note 9 6 7 8 9 10 GND LED2 GND TX+ TX- Ground signal On receiving packets Ground signal 100/10Base-T transmit data 100/10Base-T transmit data J9: Status LEDs The HDD and Ethernet activity LEDs are implemented on the J9 connector. It is a 3x2 pin - 2mm step. The following table shows the J9 connector pinout: Table 3.
Application Note Important Note. Connection to a 100BASE-TX hub for 100 Mbps operation requires Cat. 5 Unshielded Twisted-Pair (UTP) cable or Cat. 5 Shielded Twisted-Pair (STP) cable. The maximum length between the 100BASE-TX hub and the adapter is 100 meters. Connection to a 10BASE-T hub for 10 Mbps operation requires a Cat. 3, 4, 5 UTP cable or Cat. 5 STP cable.
Application Note 11 Generic Ethernet adapter Eurotech has developed a fail-safe circuitry that can be installed to prevent faulty and damages. To prevent wrong connections between the CPU-1220 and the Ethernet adapter Eurotech has developed a generic adapter that can be used together with the CPU-1220 for installing both the Realtek chips.
Chapter 2 Application Note Drivers Visit the Eurotech web site for the latest driver availability.
Application Note Related Documents For detailed information on the CPU-1220 board please refer to the User Manual. For further information about the Realtek RTL8139X please refer to the technical Data Sheet.
