Digital Semiconductor 21140A 10/100BASE–TX Evaluation Board User’s Guide Order Number: EC–QN7QC–TE Revision/Update Information: Digital Equipment Corporation Maynard, Massachusetts This preliminary document supersedes the Digital Semiconductor 21140A 10/100BASE–TX Evaluation Board User’s Guide (EC–QN7QB–TE).
July 1996 While Digital believes the information included in this publication is correct as of the date of publication, it is subject to change without notice.
FCC Statement for Class A Equipment Warning! This is a Class A product. In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures. This equipment generates, uses, and may emit radio frequency energy. The equipment has been type tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of FCC rules, which are designed to provide reasonable protection against such radio frequency interference.
Contents Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii 1 Introduction 1.1 1.2 1.3 1.3.1 1.4 1.5 1.6 What is the EB140A–TX? EB140A–TX Features . . . EB140A–TX Description . Block Diagram . . . . . . LEDs and Connectors . . . General-Purpose Port . . . . EB140A–TX Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figures 1–1 1–2 1–3 1–4 Main Components of the EB140A–TX EB140A–TX Block Diagram . . . . . . . . EB140A–TX LEDs and Connectors . . General-Purpose Port Bit Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3 1–4 1–5 1–7 EB140A–TX LED and Connector Descriptions . General-Purpose Port Bit Descriptions . . . . . . Guidelines for Using Documentation . . . . . . . .
Preface This document describes the Digital Semiconductor 21140A 10/100BASE–TX Evaluation Board (also referred to as the EB140A–TX), which is a sample design and development board for systems based on the Digital Semiconductor 21140A PCI Fast Ethernet LAN Controller (21140A). The EB140A–TX supports 10BASE–T and 100BASE–TX Fast Ethernet, and complies with the electrical and protocol requirements of the PCI Local Bus Specification, Revision 2.0 and PCI Local Bus Specification, Revision 2.1.
1 Introduction This chapter describes the main components of the EB140A–TX. The chapter describes how to interpret the LEDs and connectors on the EB140A–TX, and it describes the bit mapping of the general-purpose port. 1.1 What is the EB140A–TX? The EB140A–TX is a 10BASE–T and 100BASE–TX PCI bus master adapter board that demonstrates the functionality of the 21140A.
1.2 EB140A–TX Features The EB140A–TX is a universal, PCI form-factor option card that has the following features: • Direct interface to PCI bus • Full PCI compliance (revisions 2.0 and 2.
1.3 EB140A–TX Description The EB140A–TX is based on the 21140A with direct connections to the PCI bus and the 10Mb/s Ethernet and 100Mb/s Fast Ethernet networks. The evaluation board is fully compliant with the PCI local bus specification, revisions 2.0 and 2.1, and is capable of PCI bus master operations working with programmable burst length. The EB140A–TX uses INTA as the primary interrupt line. The EB140A–TX uses a 5-volt to 3.3-volt regulator to supply power for the 21140A.
1.3.
1.4 LEDs and Connectors Figure 1–3 shows the LEDs and connectors for the EB140A–TX, and Table 1–1 describes the components. Figure 1–3 EB140A–TX LEDs and Connectors 2 Transmit LED 1 Link Status LED 3 Receive LED 4 RJ45 Network Connector LJ-04836.
Table 1–1 EB140A–TX LED and Connector Descriptions Reference ! " and # Component Description Link status LED Indicates the link status. The single green LED displays the following patterns: " Receive LED # Transmit LED LED Status Meaning Green on Indicates that the PHY found a valid link on the network connection and is ready for normal operation. Green off Indicates that the PHY did not find a valid link on the network connection. Transmit and receive are not possible.
1.5 General-Purpose Port The 21140A has an 8-bit, general-purpose port for setting the various operating modes of the EB140A–TX. CSR12 in the 21140A controls the general-purpose port. Figure 1–4 shows the bit mapping of the general-purpose port, and Table 1–2 describes the bit operations. For detailed information about the general-purpose port, refer to the Digital Semiconductor 21140A PCI Fast Ethernet LAN Controller Hardware Reference Manual.
Table 1–2 General-Purpose Port Bit Descriptions Bit Description 21140A Operating Mode Active Level 0 Provides reset to the DP83840. Output High (1) 1 Reserved. Output — 2 Reserved. Output — 3 Reserved. Output — 4 Reserved. Output — 5 DP83840 indication to the 21140A that a packet is being transmitted. Input Low (0) 6 DP83840 indication to the 21140A that a packet is being received. Input Low (0) 7 Indicates the link status of the DP83840.
1.6 EB140A–TX Dimensions The physical dimensions of the EB140A–TX are as follows: Height: 8.6 cm (3.4 in) Width: 13.9 cm (5.
2 System Requirements, Kit Contents, and Installation This chapter describes the system requirements for using the EB140A–TX, lists the contents of the EB140A–TX kit, and describes how to install the evaluation board. 2.1 System Requirements To use the EB140A–TX, you need the following: • A PCI-based PC (with master mode operation allowed) that is compliant with PCI local bus specification, revisions 2.0 and 2.1 • A PCI master mode expansion slot • A 3.5-inch, 1.
2.2 Kit Contents The Digital Semiconductor 21140A 10/100BASE–TX Evaluation Board Kit contains the following materials. For additional drivers or software updates, contact your Digital sales representative or your local distributor. • A Digital Semiconductor 21140A 10/100BASE–TX Evaluation Board (EB140A–TX) • A hardware design package (on a 3.5-inch diskette) that contains the following information. Section 2.2.2 describes how to unpack the files.
2.2.1 Using the Documentation Table 2–1 provides guidelines for using the documentation to accomplish specific tasks. Table 2–1 Guidelines for Using Documentation If you want to... Start with the... Install a driver README.
2.3 Installation Procedure To install the EB140A–TX and load the drivers, do the following: 1. From the diskette that contains the driver you are loading, read the README.TXT file. It provides information about how to configure the EB140A–TX. 2. Turn off the power to the PC. 3. Remove the PC system box cover. 4. Insert the card edge of the EB140A–TX into an available master PCI option slot in the PC. 5. Connect the 10BASE–T or 100BASE–TX communications media to the RJ45 network connector (Figure 1–3).
A Technical Support and Ordering Information A.1 Obtaining Technical Support If you need technical support or help deciding which literature best meets your needs, call the Digital Semiconductor Information Line or visit the Digital Semiconductor World-Wide Web Internet site: United States and Canada Outside North America World-Wide Web Internet site 1–800–332–2717 +1–508–628–4760 http://www.digital.com/info/semiconductor A.
A.3 Ordering Digital Semiconductor Literature The following table lists some of the available Digital Semiconductor literature. For a complete list, contact the Digital Semiconductor Information Line. Title Order Number Digital Semiconductor 21140A PCI Fast Ethernet LAN Controller Product Brief EC–QN7MB–TE Digital Semiconductor 21140A PCI Fast Ethernet LAN Controller Data Sheet EC–QN7PB–TE Digital Semiconductor 21140A PCI Fast Ethernet LAN Controller Hardware Reference Manual EC–QN7NC–TE A.
Mail the information to: Digital Equipment Corporation Attn: Marketing/Product Updates 77 Reed Road, HLO2-2/M9 Hudson, MA 01749 USA To order additional drivers or software updates, contact your Digital sales representative or your local distributor.
