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Application Report

SLLA032

Digital Signal Processing Solutions March 1999

TNETE2201 EVM Kit Setup and Usage

Boyd Barrie MSDS Applications Group

Abstract

The Texas Instruments (TI ) TNETE2201 EVM (evaluation module) kit is a tool used to

evaluate and design high-speed prototypes using the TNETE2201 Ethernet Transceiver

IC (10 mm x 10 mm TQFP plastic package). The EVM kit is used to evaluate device

parameters while acting as a guide for high-speed board layout. The high-speed

interface is selectable between a 50- SMA connector and a GBIC standard interface.

The GBIC standard also provides a 75- copper interface module and various fiber optic

options. Overall, the designer can use the EVM kit as a tool for successful evaluation

and design of an end product.

Contents

Introduction ......................................................................................................................................................2

Board Layout and Configuration ......................................................................................................................3

Test Configuration and Results........................................................................................................................4

Board Layouts, Schematics, and Bill of Materials ............................................................................................6

Summary of content (14 pages)

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Application Report SLLA032 TNETE2201 EVM Kit Setup and Usage Boyd Barrie MSDS Applications Group Abstract The Texas Instruments (TIä) TNETE2201 EVM (evaluation module) kit is a tool used to evaluate and design high-speed prototypes using the TNETE2201 Ethernet Transceiver IC (10 mm x 10 mm TQFP plastic package). The EVM kit is used to evaluate device parameters while acting as a guide for high-speed board layout.
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Application Report SLLA032 Figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. GBIC Setup Modifications ................................................................................................................4 Bit Error-Rate Ratio Test Configuration ...........................................................................................5 Eye Diagrams of High-Speed Serial Outputs .................................................................................
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Application Report SLLA032 Board Layout and Configuration The TNETE2201 EVM kit is designed to give the developer many options for operation. Many of these options are selectable by DIP switch and others may require board component removal or additions. The following sections provide guidelines to configure the EVM kit for different modes of operation. The EVM kit is normally delivered in a default configuration that requires external clock and data inputs.
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Application Report SLLA032 Designator Function Condition (TNETE2201) DIP1-4 LCKREFN X (OFF) DIP1-5 TESTEN ON DIP1-6 SYNCEN X (OFF) DIP1-7 LOOPEN ON DIP1-8 CLKEN X (OFF) Note: X is a don't care state (default position). The GBIC Configuration requires a modification of the steering capacitors C23 through C30. This requires removing C24, C26, C27, and C30 and soldering these capacitors in locations C23, C25, C28, and C29 (see Figure 1). Figure 1.
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Application Report SLLA032 Both the pulse generator and the BERT are synchronized with an external clock source. The operator adjusts the variable phase delay to ensure that the clock meets the setup and hold time of the data. The parallel data along with the clock is routed to the transmitter where the data is serialized and captured by the oscilloscope. Figure 3 shows an example eye diagram taken using this technique. Figure 2.
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Application Report SLLA032 Board Layouts, Schematics, and Bill of Materials TNETE2201 EVM Kit Setup and Usage 6
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07/10/98 15:29:30 T.I. Internal Data bom_list.
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Application Report SLLA032 TI Contact Numbers INTERNET TI Semiconductor Home Page www.ti.com/sc TI Distributors www.ti.com/sc/docs/distmenu.htm PRODUCT INFORMATION CENTERS Americas Phone +1(972) 644-5580 Fax +1(972) 480-7800 Email sc-infomaster@ti.com Europe, Middle East, and Africa Phone Deutsch +49-(0) 8161 80 3311 English +44-(0) 1604 66 3399 Español +34-(0) 90 23 54 0 28 Francais +33-(0) 1-30 70 11 64 Italiano +33-(0) 1-30 70 11 67 Fax +44-(0) 1604 66 33 34 Email epic@ti.
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Application Report SLLA032 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.