Texas Instruments TRF6901, MSP430 User Manual

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      

User’s G uide

April 2002 Mixed-Signal RF Products

SWRU006A

EVM IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION

PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive.

Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR S TA TUTOR Y, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive.

TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein.

Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact the TI application engineer.

Persons handling the product must have electronics training and observe good laboratory practice standards. No license is granted under any patent right or other intellectual property right of TI covering or relating to any

machine, process, or combination in which such TI products or services might be or are used.

Mailing Address:

Texas Instruments Post Office Box 655303 Dallas, Texas 75265

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the specified input and output ranges described in the EVM User’s Guide.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to operate properly with certain components above 60°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch.

Mailing Address:

Texas Instruments Post Office Box 655303 Dallas, Texas 75265

About This Manual

How to Use This Manual

Preface

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This document presents the contents of the TRF6901 868 MHz to 870 MHz RF tool kit. Both hardware and software are described in detail. The first half of the document addresses the TRF6901 RF EVM in a stand-alone evaluation environment. The second half of the document addresses the TRF6901 serial port module that is used to support the TRF6901 RF EVM evaluation in a system environment configuration.

It is important when reading this document to remember that the TRF6901 serial port module is a support module provided along with the TFR6901 RF EVM contained in the TRF6901 RF tool kit. The TRF6901 serial port module is NOT to be considered a stand-alone tool.

Using this document, the user will understand the features of the TRF6901 RF EVM as well as the features of the TRF6901 serial port module as it relates to the TRF6901 RF EVM. Also, the user will become familiar with the features and functionality of both the TRF6901 EVM and the TRF6901 serial port tools software packages.

With the TRF6901 EVM software package, the user will understand how to evaluate the functionality of the TRF6901 on the TRF6901 RF EVM via a PC parallel port. With the serial port software package, the user will understand how to use the programming tool to evaluate the TRF6901 via the PC serial port connection to the TRF6901 serial port module.

Finally, along with being exposed to the basic structure and protocol of an RF link example, the user will be able to use the system mode tool contained within the TRF6901 serial port tools software to establish a basic RF link using two TRF6901 RF tool kits.

Evaluation Board Disclaimer

Please note that the enclosed evaluation boards are experimental printed circuit boards and are therefore only intended for device evaluation.

We would like to draw your attention to the fact that these boards have been processed through one or more of Texas Instruments’ external subcontractors which have not been production qualified.

Information About Cautions and Warnings

The fee associated with the evaluation modules (EVM) is a partial nonrecurring engineering fee (NRE) to partially defray the engineering costs associated with the EVM development and applications support for the RF integrated semiconductor product. The EVM is a tool for evaluating the RF semiconductors supplied by Texas Instruments. The EVM is supplied to prospective component customers to provide services and software allowing the prospect customers to evaluate the RF semiconductors in products they would build.

The EVM may be operated only for product evaluation purposes and then only in nonresidential areas. TI’s understanding is that the customers’ products using the RF parts listed shall be designed to comply with all applicable FCC and appropriate regulatory agency requirements and will, upon testing, comply with these requirements. Operation of this device is subject to the conditions that it does not cause harmful interference and that it must accept any interference.

How to Use This Manual

This document contains the following chapters:

- Chapter 1—TRF6901 RF Tool Kit Overview

- Chapter 2—TRF6901 RF EVM PCB Hardware

- Chapter 3—TRF6901 EVM Control Software

- Chapter 4—TRF6901 Serial Port Tool Overview

- Chapter 5—TRF6901 Serial Port Module PCB Hardware

- Chapter 6—TRF6901 RF Tool Kit System Mode

- Chapter 7—TRF6901 Serial Port Tools Software

Information About Cautions and Warnings

This book may contain cautions and warnings.

This is an example of a caution statement. A caution statement describes a situation that could potentially

damage your software or equipment.

This is an example of a warning statement. A warning statement describes a situation that could potentially

cause harm to you

The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully.

Contents

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1 TRF6901 RF Tool Kit Overview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Contents 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TRF6901 EVM/Parallel Port Configuration 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.4 TRF6901 EVM/Serial Port Module Configuration 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2 TRF6901 RF EVM PCB Hardware 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Hardware Overview 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 TRF6901 RF Block Diagram 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 TRF6901 RF EVM Schematics 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Top- and Bottom-Side Silkscreen and Drawing 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.5 Parts List 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 TRF6901 RF EVM Regulated Supply Configuration 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.7 TRF6901 Parallel Port Module Interface 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8 TRF6901 RF EVM Jumpers 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8.1 Jumper Connections 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8.2 Default Jumper Connections 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.8.3 Jumper Description 2-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.9 Connectors 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.10 Test Points (TP) 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.11 Adjustments 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12 LED Indicators 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 TRF6901 RF EVM Control Software 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.1 TRF6901 RF EVM Control Software Overview 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 TRF6901 RF EVM Control Software Installation 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 TRF6901 RF EVM Setup With Control Software 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 How to Use the TRF6901 Control Software 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Main Program Screen 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.1 Synthesizer 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.2 Mode Options 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.3 Operating Modes 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.4 Help Box 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.5 Words 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.6 Operation Mode 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5.7 The Menu Bar 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 IC Layout Screen 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6.1 Main IC Layout Form 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6.2 Options 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

3.6.3 FSK/OOK Test 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7 Testing the Transmitter 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.1 Step 1: Test Setup 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.2 Step 2: Software Programming 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.3 Step 3: Spectrum Analyzer Setup 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.4 Step 4: FSK Modulation Output Test 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7.5 FSK Test Using an External Source 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8 Testing of the Receiver 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8.1 Test Equipment Setup 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8.2 Software Programming for Receiver Testing 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8.3 LEARN and HOLD Modes 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8.4 Measured Receive Data 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 TRF6901 Serial Port Tool Overview 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 Purpose 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 TRF6901 Serial Port Module Description 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5 TRF6901 Serial Port Module PCB Hardware 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 Hardware Overview 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 PC Serial Port Interface 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 MSP430 Features 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 TRF6901 SV1 Interface 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Control Signal Interface J12 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.6 JTAG Interface J13 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.7 Miscellaneous MSP430 Port Terminals 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.8 LED Status Indicators 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6 TRF6901 RF Tool Kit System Mode 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 TRF6901 RF Tool Kit System Mode Overview 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.1 Protocol Used by the System Mode RF Link 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1.2 Specification Followed for the System Mode RF Link Example 6-2. . . . . . . . . . . .

6.2 System Mode Description 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.1 System Mode Tool Kit Configuration 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.2 System Mode Concerns 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.3 System Mode Protocol Basics 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.4 System Mode Communication Flow 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.2.5 System Mode Transmission Protocol Details 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . .

7 TRF6901 Serial Port Tools Software 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 TRF6901 Serial Port Tools Software Overview 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 TRF6901 Serial Port Tools Software Installation 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3 TRF6901 Serial Port Tools Software Main Form 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3.1 Tool Bar Options 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4 TRF6901 Programming Tool 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4.1 Programming Tool Binary Input Form 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4.2 Programming Tool Block Diagram Use 7-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5 TRF6901 System Mode Tool 7-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5.1 System Mode Software Overview 7-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5.2 System Mode Form 7-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5.3 System Mode Configuration 7-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5.4 System Mode Operation 7-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6 TRF6901 European Frequency Plan Tool 7-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Contents

7.6.1 European ISM Band Frequency Error Calculations Form 7-14. . . . . . . . . . . . . . . .

7.6.2 European ISM Band Frequency Calculations Form Overview 7-15. . . . . . . . . . . . .

7.6.3 Frequency Error Calculation Operation 7-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.7 Reprogramming of the MSP430F149 7-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

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1−1 TRF6901 EVM/Parallel Port Configuration 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1−2 TRF6901 EVM/Serial Port Module Configuration 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−1 TRF6901 Block Diagram 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−2 TRF6901 RF EVM Schematics 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−3 Top-Side Silkscreen and Drawing of TRF6901 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−4 Bottom-Side Silkscreen of TRF6901 RF EVM 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−5 TRF6901 EVM DC Voltage Setup 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−6 TRF6901 RF EVM Parallel Port Interface 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2−7 TRF6901 RF EVM Jumper Locations and Default Configurations of the EVM 2-13. . . . . . . .

3−1 Main Program Screen 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−2 TRF6901 IC Layout Screen 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−3 Equipment Setup for Testing of the TRF6901 EVM Transmitter 3-14. . . . . . . . . . . . . . . . . . . . .

3−4 Main Programming Screen Setup for Testing the Transmitter 3-14. . . . . . . . . . . . . . . . . . . . . .

3−5 IC Layout Screen Setup for Testing the Transmitter 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−6 Carrier Signal on the Spectrum Analyzer 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−7 FSK Output From Transmitter 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−8 Equipment Setup for FSK Test With an External Modulation 3-18. . . . . . . . . . . . . . . . . . . . . . .

3−9 FSK Output From Transmitter With an External Modulation 3-19. . . . . . . . . . . . . . . . . . . . . . . .

3−10 Test Setup for TRF6901 EVM Receiver Testing 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−11 Main Program Screen Setup for Receiver Testing 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−12 IC Layout Screen for the Receiver Testing 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3−13 RXDATA Signal at −50-dBm Input Signal to the Receiver 3-23. . . . . . . . . . . . . . . . . . . . . . . . . .

3−14 RXDATA Signal at −90-dBm Input Signal to the Receiver 3-24. . . . . . . . . . . . . . . . . . . . . . . . . .

4−1 TRF6901 RF Tool Kit 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−1 TRF6901 Serial Port Module Schematic 5-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−2 TRF6901 Serial Port Module Top Level Layout 5-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−3 SV1 Terminal Connections 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5−4 TRF6901 Serial Port Module LED Indicators 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6−1 Setup of Two TRF6901 RF Tool Kits in the System Mode 6-2. . . . . . . . . . . . . . . . . . . . . . . . . . .

6−2 Phases of the Communication Flow 6-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6−3 TX-Data RF Transmission Sequence Control 6-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−1 TRF6901 Serial Port Tools Software 7-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−2 Programming Tool Binary Input Form 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−3 Programming Tool Block Diagram (Standby Mode 0 − Transmit) 7-6. . . . . . . . . . . . . . . . . . . . .

7−4 Programming Tool Block Diagram (Standby Mode 1 − Receive) 7-7. . . . . . . . . . . . . . . . . . . . .

7−5 Programming Tool Block DIagram (Active Mode Transmit) 7-8. . . . . . . . . . . . . . . . . . . . . . . . . .

7−6 Programming Tool Block DIagram (Active Mode Receive) 7-9. . . . . . . . . . . . . . . . . . . . . . . . . .

7−7 System Mode Tool—Version 2.01 7-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−8 System Mode Tool—Example Operation 7-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7−9 European ISM Band Frequency Error Calculations Form 7-14. . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 1

    

This chapter provides an overview of the TRF6901 RF tool kit.

Topic Page

1.1 Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.2 Contents 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1.3 TRF6901 EVM/Parallel Port Configuration 1-2. . . . . . . . . . . . . . . . . . . . . . .

1.4 TRF6901 EVM/Serial Port Module Configuration 1-2. . . . . . . . . . . . . . . . .

TRF6901 RF Tool Kit Overview

1-1

Description

1.1 Description

1.2 Contents

The TRF6901 RF tool kit is to be used to evaluate the functionality and system performance of Texas Instrument’s TRF6901 ISM-band transceiver. It is intended to be an evaluation tool and is not to be considered a reference design. It is important to remember that board layout is a critical parameter affecting the performance of any RF device. The performance of the TRF6901 on the TRF6901 RF EVM demonstrates one implementation of a TRF6901 transceiver layout.

Contained within the TRF6901 RF tool kit are the following:

- TRF6901 RF EVM board

- TRF6901 serial port module

- Serial port cable

- Parallel port cable

- CD ROM

- Software diskette

1.3 TRF6901 EVM/Parallel Port Configuration

The TRF6901 EVM/parallel port configuration, as shown in Figure 1−1, is to be used when observing the functionality of the TRF6901 on the TRF6901 RF EVM stand alone via a standard PC parallel port. Chapter 2—TRF6901 RF

EVM PCB Hardware covers the TRF6901 RF EVM in detail.

Figure 1−1.TRF6901 EVM/Parallel Port Configuration

1.4 TRF6901 EVM/Serial Port Module Configuration

The TRF6901 EVM/serial port module configuration, as shown in Figure 1−2, is to be used when observing the functionality of the TRF6901 on the TRF6901 RF EVM with the serial port module via a standard PC serial port. With this configuration, the system mode functionality can also be observed. See Chapter 6—TRF6901 RF Tool Kit System Mode for further details on the system mode operation.

To PC Parallel Port

1-2

TRF6901 EVM/Serial Port Module Configuration

Figure 1−2.TRF6901 EVM/Serial Port Module Configuration

To PC Serial Port

TRF6901 RF Tool Kit Overview

1-3

1-4

Chapter 2

    !

This chapter describes the PCB hardware of the TRF6901 RF EVM.

Topic Page

2.1 Hardware Overview 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 TRF6901 RF Block Diagram 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 TRF6901 RF EVM Schematics 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.4 Top- and Bottom-Side Silkscreen and Drawing 2-5. . . . . . . . . . . . . . . . . .

2.5 Parts List 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.6 TRF6901 RF EVM Regulated Supply Configuration 2-11. . . . . . . . . . . . . .

2.7 TRF6901 Parallel Port Module Interface 2-12. . . . . . . . . . . . . . . . . . . . . . . .

2.8 TRF6901 RF EVM Jumpers 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.9 Connectors 2-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.10 Test Points (TP) 2-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.11 Adjustments 2-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.12 LED Indicators 2-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 RF EVM PCB Hardware

2-1

Hardware Overview

2.1 Hardware Overview

The TRF6901 ISM-band transceiver IC operates from 860 MHz to 930 MHz. It has low power consumption and an operating voltage of 1.8 V to 3.6 V. It uses an integer-N synthesizer and supports FSK/OOK operation. Other features include an on-chip reference oscillator, phase lock loop, brownout detector, and XTAL software trimming.

The TRF6901 RF evaluation module (EVM) provides a platform for lab prototype evaluation of the Texas Instruments TRF6901 transceiver IC. The EVM is used to evaluate the RF performance of the TRF6901. It contains a PC parallel port interface. The transmitted signal can be viewed on a spectrum analyzer as either a single output frequency or in FSK mode. Although higher data rates are achievable with the TRF6901, the TRF6901 EVM is designed to operate at bit rates up to 32-kbps NRZ, with a deviation of approximately ±50 kHz, at room temperature.

2.2 TRF6901 RF Block Diagram

Figure 2−1 shows the block diagram of the TRF6901 ISM transceiver IC.

Figure 2−1.TRF6901 Block Diagram

LNA_IN1, LNA_IN2

860 MHz to 930 MHz

DET_OUT

DC_DC_IN

DC_DC_OUT

PA_OUT

860 MHz to 930 MHz

typical 9 dBm

1, 2

25 22

LNA

Band-gap

Brownout

Detector

DC-DC

Converter

Ceramic

IF Filter

Mixer

MIX_OUT

44, 43 35

32/33

Ceramic

Discriminator

IF_IN1,2

Limiter

RSSI

/A-

Counter

CER_DIS

/Div. CTRL

/B-

Counter

PFD

CPs

15 CP_OUT13VCO_TUNE

LPF_IN

37 36

LPF Amplifier

Quad.

Dem.

2..254

/Ref

2..255

LPF_OUT

LEARN/HOLD

39 34

Data Slicer

Serial

Interface

2..62

XTAL

SLC_CAP

XTAL_SW

20 19 26

RX_DATA

RSSI_OUT

CLOCK DATA STROBE

STDBY MODE

CLK_OUT

TX_DATA

2-2

Loop Filter

2.3 TRF6901 RF EVM Schematics

Figure 2−2 shows the TRF6901 RF EVM schematics.

Figure 2−2.TRF6901 RF EVM Schematics (1 of 4)

BPF1

SFECV10.7MA2S−A

BW=330kHz

123

82pF

C2 15pF

120pF

82pF

4.7 µH

C5 68pF

TRF6901 RF EVM Schematics

RSSI

C13 150pF

22pF

8.2 nH

2.7pF

LNA_VCC

VCO_VCC1

2.7pF

L2 10nH

PA_VCC

VCO_TANK2

VCO_TANK1

C18 100pF

VCO_VCC

C38

10000pF

1 2 3 4 5 6 7 8

9 10 11 12

C30

100pF

C37

1000pF

R13

6.8k

MIX_VCC

4.7uH

LNA

PA_OUT

VCO

VCO_TUNE

MIX_OUT

R10 18k

PLL

CP_OUT

DET_OUT

CP_VCC

DVDD

C39

0.1uF

IF_IN1 44

TRF6901

TX OUT

RX_IN+

VCO_VCC2 DCDC_OUT

50 OHM

TL1

50 OHM

TL2

C11

1.8 pF

PA_V CC

C56

C17

10000pF

0.1uF

JP1

Figure 2−2. TRF6901 RF EVM Schematics (2 of 4)

VCC1

VCCM

R3 10

C15

0.1uF

R5 10

JP2

C23

C24 10000pF

0.1uF

C19

0.1uF

C25

0.1uF

R11

C34

0.1uF

R14

C41

0.1uF

C16 10000pF

C20 10000pF

C26 10000pF

C42 10000pF

XTAL_VCC

DVDD

VCO_VCC1

VCO_VCC2

PA_V CC

IF_IN2 43

181716

CLOCK

RSSI

STROBE

C40 10000pF

RSSI_OUT 41

DATA

DEM_VCC

LRN/HOLD

Reference generator

DC/DC

Conv.

212019

MODE

JP3

R6 10

R8 10

R12

R15

LEARN/HOLD 39

Data slicer

CLK_OUT

C29

0.22uF

DC_DC_OUT

C31

0.47uF

3 1

LPF_IN

24C123C222

100 DNP

C21

0.1uF

C27

0.1uF

C35

0.1uF

C43

0.1uF

220k

82pF

LPF_OUT

CER_DIS

SLC_CAP

RX_DATA

TX_DATA

32 31 30

XTAL 29 28 27 26

DC_DC_IN

C32

1.0uF DNPDNP

DCDC_OUT VCO_VCC2

C22 10000pF

C28 10000pF

C36 150pF

C44 10000pF

TP2

TP1

GND

LPF_OUT

DIS1

10.7 CDACV10M7GA001

C10

2200pF

RX_DAT A

XTAL_SW

DCDC_VCC

LNA_VCC

MIX_VCC

DEM_VCC

TX_DATA

XTAL1 20MHz

97SMX(C)−20MHZ

TP3

DCDC_OUT

C33

0.47uF DNP

XTAL_VCC

MCU_CLK

STDBY DCDC_VCC

DCDC_OUT

C14 15pF

C12

68pF

47uH

DNP

TRF6901 RF EVM PCB Hardware

2-3

TRF6901 RF EVM Schematics

Figure 2−2. TRF6901 RF EVM Schematics (3 of 4)

VCC2

R16 220

LED1 ENABLE LN1261C−(TR)

R19

Q1 FMMT2222ATA

TP14

EX_STDBY

VCC2

3 1

VCC2

R37 220

LED2 BRNOUT LN1261C−(TR)

Q2 FMMT2222ATA

10k

R30

R29

10k

1.0k

JP5

VCC2

DB25M

VCC2

R21 10k

1OE

1A1

1Y1

1A2

1Y2

1A3

1Y3

1A4

1Y4

SN74LVT244BDW

2OE

2A192Y1

2A2

2Y2

2A3

2Y3

2A4

2Y4

1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13

C47

0.1uF

TP6

CLOCK

TP7

DATA

TP8

STROBE

TP9

TXDATA

TP10

STDBY

TP11 MODE

TP12

LRNHOLD

TP16

BRNOUT

TP17

RXDATA

R20 100 R22 100 R23 100 R24 100 R25 100 R26 100 R27 100

TP13

EX_MODE

3 1

R28

1.0k

JP4

R38 10k

103309−5

R17

VCCM

C45

0.1uF

R18

VCC2

C46

0.1uF

CR1

R36

R35

R34

R33

R32

R31

10k

R39

R40

10k

LL4148

12345678910111213141516171819

MCU_CLK

TP5 RSSI

RSSI

CLOCK

DATA

STROBE

TX_DATA

STDBY

MODE

LRN/HOLD

EXTERNAL_TX_DATA

DET_OUT

RX_DAT A

MCU_CLK

RSSI

CLOCK

DATA

STROBE

TX_DATA

STDBY

MODE

LRN/HOLD

TP15

EX_TXDATA

DET_OUT

RX_DAT A

Figure 2−2. TRF6901 RF EVM Schematics (4 of 4)

POWER

TP4

6 V min to 8 V max

TP18

GND

ZR1

SMBJ8.5CA

C49 10uF

C50

0.1uF

VR1

REG101NA−A

GND

C52

0.1uF

VR2

REG101NA−3.3

GND

C55

0.1uF

OUT ADJ

OUT

5 4

CCWCW

5 4

C54 10000pF

R41

1.8k

R43

R45 820

C48 10000pF

C53 10uF

C51 10uF

R42

1.8−3.6V(3.0VTYP)

JP6

LED3 VCC1 LN1261C−(TR)

R44 220

VCC1

3.3V

VCC2

2-4

2.4 Top- and Bottom-Side Silkscreen and Drawing

Figure 2−3 shows the top-side silkscreen of the TRF6901 RF EVM and Figure 2−4 shows the bottom-side silkscreen.

Figure 2−3.Top-Side Silkscreen and Drawing of TRF6901

TRF6901 RF EVM Schematics

Figure 2−4.Bottom-Side Silkscreen of TRF6901 RF EVM

TRF6901 RF EVM PCB Hardware

2-5

Parts List

Murata SFECV10.7MA2S−A−TC Murata

SFECV10.7MA

2S−A−TC

Piezoelectric ceramics

SFECV10.7 Surface mounted chip

330 kHz

Murata GRM39X7R104J016AD Murata

4J016AD

filters for AM and FM

applications

Murata GRM39X7R224J010AD Murata

4J010AD

Murata GRM39Y5V474J010AD Murata

4J010AD

Murata GRM39Y5V105J010AD Murata

5J010AD

Murata GRM39C02R2C050AD Murata

C050AD

Murata GRM39C02R7C050AD Murata

C050AD

Murata GRM235Y5V106Z016AD Murata

GRM235Y5V1

Murata GRM39C0150J050AD Murata

06Z016AD

capacitor—tantalum

J050AD

replacement

Murata GRM39C0220J050AD Murata

J050AD

Murata GRM39C0680J050AD Murata

J050AD

Murata GRM39C0820J050AD Murata

J050AD

2.5 Parts List

2-6

RefDes Value Note Pattern Name Description Part Number Manufacturer Distributor P/N Distributor

Count

1 BPF1 BW =

0.1 µF 0603 Ceramic chip capacitor GRM39X7R10

C19, C21,

C23, C25,

C27, C34,

C35, C39,

18 C15, C17,

C41, C43,

C45−C47,

C50, C52,

C55

1 C29 0.22 µF 0603 Ceramic chip capacitor GRM39X7R22

2 C31, C33 0.47 µF DNP 0603 Ceramic chip capacitor GRM39Y5V47

1 C32 1 µF DNP 0603 Ceramic chip capacitor GRM39Y5V10

1 C11 1.8 pF 0603 Ceramic chip capacitor GRM39C02R2

2 C6, C9 2.7 pF 0603 Ceramic chip capacitor GRM39C02R7

10 µF 1210 Monolithic chip

C53

3 C49, C51,

2 C2, C14 15 pF 0603 Ceramic chip capacitor GRM39C0150

1 C7 22 pF 0603 Ceramic chip capacitor GRM39C0220

2 C5, C12 68 pF 0603 Ceramic chip capacitor GRM39C0680

3 C1, C3, C8 82 pF 0603 Ceramic chip capacitor GRM39C0820

DistributorDistributor P/NManufacturerPart NumberDescriptionPattern NameNoteValueRefDes

Murata GRM39C0101J050AD Murata

Murata GRM39C0121J050AD Murata

Murata GRM39C0151J050AD Murata

Murata GRM39X7R102J050AD Murata

Murata GRM39X7R222J050AD Murata

Murata GRM39X7R103J050AD Murata

90F2624 Newark

Components

Murata LQG21C4R7N00T1 Murata

Murata LQW1608A8N2D00 Murata

Parts List

Murata LQW1608A10NJ00T1 Murata

J050AD

2J050AD

3J050AD

10000 pF 0603 Ceramic chip capacitor GRM39X7R10

142−0701−801 Johnson

− horizontal/PC mount

0.062 Thk

00T1

2D00

NJ00T1

S1812−473K API Delevan DN1132TR−ND Digi-Key

LN1261C−(TR) Panasonic P503TR−ND Digi-Key

(Shielded)

LED-gull wing-GW

LED, GW type Surface mount

ENABLE

BRNOUT

Type-Red

VCC1

Count

2 C18, C30 100 pF 0603 Ceramic chip capacitor GRM39C0101

1 C4 120 pF 0603 Ceramic chip capacitor GRM39C0121

2 C13, C36 150 pF 0603 Ceramic chip capacitor GRM39C0151

1 C37 1000 pF 0603 Ceramic chip capacitor GRM39X7R10

1 C10 2200 pF 0603 Ceramic chip capacitor GRM39X7R22

C22, C24,

C26, C28,

13 C16, C20,

C38, C40,

C42, C44,

C48, C54,

C56

1 CR1 MELF3 (MINIMELF) Fast switching diode LL4148 Diode INC LL4148CT−ND Digi-Key

2 J1, J2 SMA_H SMA brass connector

2 JP1, JP3 SMD−3 way-JP Jumper-3 Way-SMD

2 JP2, JP6 Jumper-2 pin Breakaway headers 4−103239−0 AMP 90F7725 Newark

2 JP4, JP5 Jumper-3 pin Breakaway headers 4−103239−0 AMP 90F7725 Newark

2 L1, L3 4.7 µH 0805−Murata Chip inductor LQG21C4R7N

TRF6901 RF EVM PCB Hardware

1 L4 8.2 nH 0603 Chip inductor LQW1608A8N

1 L2 10 nH 0603 Chip inductor LQW1608A10

LED2,

1 L5 47 µH DNP 0805−1812 Chip inductor

3 LED1,

2-7

LED3

Parts List

DistributorDistributor P/NManufacturerPart NumberDescriptionPattern NameNoteValueRefDes

Venkel CR0603−16W−000T Venkel

Venkel CR0603−16W−102JT Venkel

Venkel CR0603−16W−182JT Venkel

Venkel CR0603−16W−682JT Venkel

Venkel CR0603−16W−100JT Venkel

Venkel CR0603−16W−103JT Venkel

Venkel CR0603−16W−183JT Venkel

Venkel CR0603−16W−101JT Venkel

Venkel CR0603−16W−221JT Venkel

Venkel CR0603−16W−224JT Venkel

Venkel CR0603−16W−821JT Venkel

Murata CDACV10M7GA001−R0 Murata

97B3257 Newark

Corp.

97B3259 Newark

Corp.

000T

102JT

0 Ω 0603 Chip resistor CR0603−16W−

182JT

3296W−1−XXX Bourns 3296W−XXX−ND Digi-Key

trimming potentiometer

682JT

100JT

10 Ω 0603 Chip resistor CR0603−16W−

103JT

10 kΩ 0603 Chip resistor CR0603−16W−

183JT

101JT

100 Ω 0603 Chip resistor CR0603−16W−

221JT

224JT

220 Ω 0603 Chip resistor CR0603−16W−

821JT

CDACV10M7G

A001−R0

for FM receiver

TP−105−01−02 Components

TP−105−01−00 Components

point (Red)

point (Black)

2-8

Count

4 R1, R4,

R14, R42

2 R28, R29 1 kΩ 0603 Chip resistor CR0603−16W−

1 R41 1.8 kΩ 0603 Chip resistor CR0603−16W−

1 R43 5 kΩ 3296W Bourns 3/8-inch square

R11, R12,

R15, R17,

1 R13 6.8 kΩ 0603 Chip resistor CR0603−16W−

10 R3, R5−R8,

R18

12 R19, R21,

R30−R36,

R38−R40

1 R10 18 kΩ 0603 Chip resistor CR0603−16W−

R22−R27

1 R9 100 Ω DNP 0603 Chip resistor CR0603−16W−

7 R20,

R44

3 R16, R37,

1 R2 220 kΩ 0603 Chip resistor CR0603−16W−

1 R45 820 Ω 0603 Chip resistor CR0603−16W−

1 DIS1 10.7 MHz CDACV Type Ceramic discriminator

1 TP4 P.C. test point Color coded P.C. test

2 TP2, TP18 GND P.C. test point Color coded P.C. test

DistributorDistributor P/NManufacturerPart NumberDescriptionPattern NameNoteValueRefDes

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

97B3253 Newark

Corp.

Parts List

97B3253 Newark

Corp.

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

point (White)

TP−105−01−09 Components

103309−5 AMP A26274−ND Digi-Key

point (White)

header assembly

747238−4 AMP A2098−ND Digi-Key

connector-25 pin-right

angle-male

Count

15 TP16 BRNOUT P.C. test point Color coded P.C. test

TP6 CLOCK P.C. test point Color coded P.C. test

TP7 DATA P.C. test point Color coded P.C. test

TP3 DCDC_OUT P.C. test point Color coded P.C. test

TP13 EX_MODE P.C. test point Color coded P.C. test

TP14 EX_STDBY P.C. test point Color coded P.C. test

TP15 EX_TXDATA P.C. test point Color coded P.C. test

TP1 LPF_OUT P.C. test point Color coded P.C. test

TP12 LRNHOLD P.C. test point Color coded P.C. test

TP11 MODE P.C. test point Color coded P.C. test

TP5 RSSI P.C. test point Color coded P.C. test

TP17 RXDATA P.C. test point Color coded P.C. test

TP10 STDBY P.C. test point Color coded P.C. test

TP8 STROBE P.C. test point Color coded P.C. test

TRF6901 RF EVM PCB Hardware

TP9 TXDATA P.C. test point Color coded P.C. test

1 P1 103309−5 Amp−latch low profile

1 P2 DB25M Subminiature D

2-9

Parts List

DistributorDistributor P/NManufacturerPart NumberDescriptionPattern NameNoteValueRefDes

Zetex FMMT2222ACT−ND Digi-Key

FMMT2222AT

Digi-Key

Instruments

296−1707−5−ND Digi-Key

Texas

Instruments

SN74LVT244B

REG101NA−A Burr−Brown REG101NA−A−ND Digi-Key

Burr−Brown REG101NA−3.3−ND Digi-Key

REG101NA−3.

SMBJ8.5CA Vishay/Liteon SMBJ8.5AGICT−ND Digi-Key

97B2647 Newark

Corp.

TP−107−01 Components

transistor − 330 mW

Count

2 Q1, Q2 SOT23 NPN switching

1 U1 TQFP48 Transceiver TRF6901 Texas

drivers with 3-state

outputs

regulator

1 U2 SO20WB Octal buffers and line

1 VR1 SOT23−5 100-mA low-dropout

regulator

1 VR2 SOT23−5 100-mA low-dropout

1 XTAL1 20 MHz 97SMX(C) Quartz crystal 97M200−20(C) SMI 97M200−20(C) SMI

suppressor

1 XTAL1A 20 MHz DNP 93SMX Quartz crystal 93M200−20 SMI 93M200−20 SMI

1 ZR1 SMBJ−BI Transient voltage

point

SMD test point Surface mount test

GND3

2 GND2,

2-10

TRF6901 RF EVM Regulated Supply Configuration

for REG101NA Regulator is Equal to:

2.6 TRF6901 RF EVM Regulated Supply Configuration

The evaluation board should be used with a dc power supply voltage of 6 V to 8 V nominal. Figure 2−5 details the dc voltage supply setup for the TRF6901 RF-only EVM.

There are three powering sources on the TRF6901 and the EVM. The adjustable output VCC1 powers all the blocks of the TRF6901 IC. The fixed output VCC2 powers all the components external to the TRF6901, such as LEDs and the digital I/O portions of the EVM. This separation of sources eliminates noise and other potential interferences. The third source is a dc-dc converter which is internal to the TRF6901 IC. The dc-dc converter can provide an adequate voltage to the charge pumps and VCO core in the event an external power supply, such as a battery, drops down to 1.8 V. Hence, increasing the operational period of the TRF6901.

VCC1 output branches out into VCO_VCC1, VCO_VCC2, XTAL_VCC, DVDD, PA_VCC, DCDC_VCC, LNA_VCC, MIX_VCC, and DEM_VCC when JP2 (see Jumper Description) is connected. These are utilized in powering various blocks of the TRF6901 IC. Prior to using the RF EVM, ensure that VCC1 is set to the nominal voltage of approximately 3 V by adjusting R43, if necessary.

Figure 2−5.TRF6901 EVM DC Voltage Setup

OUT

= 1.267 [1+(R41/R43)]

OUT

V at Terminal 1 of REG101NA Should Be 2 V to 3 V Higher Than V

VR1

REG101NA−A

C52

0.1 uF

1 3

C55

0.1uF

OUT

ADJ

GND

VR2

REG101NA−3.3

OUT

GND

POWER

TP4

6 V to 8 V

TP18

GND

ZR1

SMBJ8.5CA

VIN is 6 V min to 8 V max

C49 10 uF

C50

0.1 uF

5 4

OUT

CCWCW

C54 10000 pF

R41

1.8k

R43

R45 820

C48 10000 pF

C53 10 uF

VCC1 is Nominally 3 V

R42

1.8 V to 3.6 V (3 V TYP)

C51 10 uF

Used to Change V

adj

From 1.8 V to 3.6 V

JP6

Connected JP6 for

Power on LED LED3 VCC1 LN1261C−(TR)

R44 220

OUT

VCC1

3.3 V

VCC2

2-11

TRF6901 Parallel Port Module Interface

2.7 TRF6901 Parallel Port Module Interface

Figure 2−6 details the parallel port interface portion of the TRF6901 RF EVM.

Figure 2−6.TRF6901 RF EVM Parallel Port Interface

VCC2

R16 220

LED1 ENABLE LN1261C−(TR)

R19

Q1 FMMT2222ATA

TP14

EX_STDBY

VCC2

3 1

VCC2

R37 220

LED2 BRNOUT LN1261C−(TR)

Q2 FMMT2222ATA

10k

R30

R29

10k

1.0k

JP5

VCC2

DB25M

VCC2

R21 10k

1OE

1A1

1Y1

1A2

1Y2

1A3

1Y3

1A4

1Y4

SN74LVT244BDW

2OE

2A192Y1

2A2

2Y2

2A3

2Y3

2A4

2Y4

1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13

C47

0.1uF

TP6

CLOCK

TP7

DATA

TP8

STROBE

TP9

TXDATA

TP10

STDBY

TP11 MODE

TP12

LRNHOLD

TP16

BRNOUT

TP17

RXDATA

R20 100 R22 100 R23 100 R24 100 R25 100 R26 100 R27 100

TP13

EX_MODE

3 1

R28

1.0k

JP4

R38 10k

103309−5

R17

VCCM

C45

0.1uF

R18

VCC2

C46

0.1uF

CR1

R36

R35

R34

R33

R32

R31

10k

R39

R40

10k

LL4148

12345678910111213141516171819

MCU_CLK

TP5 RSSI

RSSI

CLOCK

DATA

STROBE

TX_DATA

STDBY

MODE

LRN/HOLD

EXTERNAL_TX_DATA

DET_OUT

RX_DAT A

MCU_CLK

RSSI

CLOCK

DATA

STROBE

TX_DATA

STDBY

MODE

LRN/HOLD

TP15

EX_TXDATA

DET_OUT

RX_DAT A

2-12

TRF6901 RF EVM Jumpers

2.8 TRF6901 RF EVM Jumpers

2.8.1 Jumper Connections

Figure 2−7 shows the default position of the jumpers on the TRF6901 RF EVM.

Figure 2−7. TRF6901 RF EVM Jumper Locations and Default Configurations of the

EVM (Sheet 1 of 2)

BPF1

SFECV10.7MA2S−A

BW=330kHz

C2 15pF

82pF

C3 82pF

120pF

4.7 uH

C5 68pF

RSSI

TX OUT

RX_IN+

VCO_VCC2

DCDC_OUT

50OHM

C17

0.1uF

TL2

PA_VCC

3 1

TL1

JP1

C11

1.8 pF

C13 150pF

C56 10000pF

22pF

8.2 nH

2.7pF

L2 10nH

2.7pF

LNA_VCC

VCO_VCC1

PA_VCC

VCO_VCC

VCO_TANK2

VCO_TANK1

C18 100pF

10000pF

C38

1 2 3 4 5 6 7 8

9 10 11 12

100pF

1000pF

MIX_VCC

4.7uH

LNA

PA_OUT

C30

C37

R13

6.8k

MIX_OUT

VCO

VCO_TUNE

R10 18k

PLL

CP_OUT

DET_OUT

IF_IN1

DET_OUT

TRF6901

CP_VCC

DVDD

C39

0.1uF

IF_IN2 43

RSSI

CLOCK

RSSI_OUT

Reference Generator

DATA

STROBE

C40 10000pF

DEM_VCC

LRN/HOLD

LEARN/HOLD

DC/DC

Conv.

DC_DC_OUT

MODE

JP3

Data Slicer

CLK_OUT

C29

0.22uF

C31

0.47uF DNP

3 1

LPF_IN

24C123C222

R9 100

DNP

220k

82pF

LPF_OUT

CER_RES

SLC_CAP

RX_DATA

TX_DAT A

32 31 30

XTAL 29 28 27 26

DC_DC_IN

C32

1.0uF DNP

DCDC_OUT VCO_VCC2

C12

LPF_OUT

XTAL_SW

68pF

47uH

DNP

C10

2200pF

TP2

TP1

GND

LPF_OUT

RES1

10.7 CDACV10M7GA001

RX_DAT A

TX_DATA

XTAL1 20MHz

97SMX(C)−20MHZ

XTAL_VCC MCU_CLK

STDBY

DCDC_VCC

TP3

DCDC_OUT

C33

0.47uF DNP

C14 15pF

DCDC_OUT

2-13

TRF6901 RF EVM Jumpers

POWER

Figure 2−7. TRF6901 RF EVM Jumper Locations and Default Configurations of the

EVM (Sheet 2 of 2)

TP4

6.0V_TO_8.0V

TP18

GND

ZR1

SMBJ8.5CA

C49 10uF

C50

0.1uF

REG101NA−A 1 3

C52

0.1uF

REG101NA−3.3 1 3

C55

0.1uF

VR1

R42

1.8 −3.6V (3.0V TYP)

JP6

LED3 VCC1 LN1261C−(TR)

R44 220

VCC1

3.3V

VCC2

GND

VR2

GND

C15

0.1uF

OUT ADJ

OUT

5 4

C16 10000pF

R41

1.8k

CCWCW

R43

R45 820

C54 10000pF

XTAL_VCC

C48 10000pF

C53 10uF

C51 10uF

IN EN

VCC1

VCCM

JP2

C23

0.1uF

C24 10000pF

R11

R14

DVDD

C19

C20

0.1uF

10000pF

VCO_VCC1

C25

C26

0.1uF

10000pF

VCO_VCC2

C34

0.1uF

C41

0.1uF

C42 10000pF

PA_VCC

R12

R15

C21

0.1uF

C27

0.1uF

C35

0.1uF

C43

0.1uF

C22 10000pF

C28 10000pF

C36 150pF

C44 10000pF

DCDC_VCC

LNA_VCC

MIX_VCC

DEM_VCC

2-14

2.8.2 Default Jumper Connections

TRF6901 RF EVM Jumpers

JP1

JP3

1 2 3

JP5

1 2 3

JP2

1 2 3

To U1−22 DC_DC_OUT To U1−10 VCO_TANK2 To VCO_VCC2

1 2

To VCC1 To VCCM

JP4

To VCO_VCC2 To U1−16 CP_VCC To U1−22 DC_DC_OUT

1 2 3

JP4 Default is no connection

To VCC2 To U1−21 MODE To GND

JP6

To VCC2

To U1−26 STDBY

To GND

To VCC1 To LED3

JP5 Default is no connection

2.8.3 Jumper Description

The jumpers on the TRF6901 RF-only EVM, as shown in Figure 2−7, are used for the following purposes.

- JP1

This jumper selects one source that is either VCO_VCC2 or DC_DC_OUT for the VCO. When JP1−3 is connected to JP1−2, VCO_VCC2 is fed to the VCO. If JP1−2 is connected to JP1−1, DCDC_OUT is connected to the VCO. The default connection is JP1−3 to JP1−2.

- JP2

This jumper connects VCC1 input to VCCM. It also connects VCC1 input to filtering networks that lead to various outputs such as XTAL_VCC, DVDD, VCO_VCC1, VCO_VCC2, and PA_VCC. These are then used to power various blocks of the TRF6901 IC. An advantage of using this jumper is that when removed, the two disconnected nodes can be connected through an ammeter that allows the user to measure the

Denotes Default Connection

2-15

Connectors

current consumption. Also, the user can insert a power supply after the REG101NA voltage regulators. Since there is no regulation stage after this jumper, make sure that any supply connected to this jumper is noise free and is set between 1.8 V and 3.6 V.

- JP3

This jumper connects one source that is either VCC_VCC2 or DC_DC_OUT to the charge pumps of the phase lock loop. When JP3−1 is connected to JP3−2, VCO_VCC2 is fed to the charge pumps of the PLL through terminal U1−16 CP_VCC. If JP3−2 is connected to JP3−3, DCDC_OUT is connected to the charge pumps. The default connection is JP3−2 to JP3−1.

- JP4

This jumper either acts as a pullup or a pulldown for the MODE terminal. When JP4−1 is connected to JP4−2, then R28 acts as a pullup resistor . O n the other hand, when JP4−2 is connected to JP4−3, then R28 acts as a pulldown resistor. The default configuration for JP4 is no connection.

- JP5

2.9 Connectors

This jumper either acts as a pullup or a pulldown for the STDBY terminal. When JP5−1 is connected to JP5−2, then R29 acts as a pullup resistor . O n the other hand, when JP5−2 is connected to JP5−3, then R29 acts as a pulldown resistor. The default configuration for JP5 is no connection.

- JP6

This jumper connects the VCC1 regulated power output to LED3 when JP6−1 is connected to JP6−2. This LED verifies EVM dc voltage is applied.

The following are descriptions of the TRF6901 EVM connectors and test points.

- P1

P1 is a 20-terminal connector that is used to connect to an external microprocessor or DSP that provides the DATA, CLOCK, STROBE, TX_DATA, STDBY, MODE, and LRN/HOLD inputs to the TRF6901. In this case, the TRF6901 is controlled by an external microprocessor or DSP rather than the control software on the PC. This port also connects to the serial port module that contains the MSP430F149 via a 20-pin cable. P1 can also be used to interface directly to the TRF6901, bypassing the parallel port interface circuitry on the EVM.

2-16

- P2

P2 is the PC parallel port interface and is a male DB25 connector. P2 is connected to the LPT1 or LPT2 port of the computer on which the control software of TRF6901 is running.

- J2 TX_OUT

2.10 Test Points (TP)

- LPF_OUT TP1

- GND TP2 and TP18

- DCDC_OUT TP3

Test Points (TP)

J1 RX_IN+ J1 RX_IN+ is an SMA female connector that feeds the received signal into

the input of the LNA.

J2 TX_OUT is an SMA female connector which is connected to the transmitter output of the TRF6901.

The LPF_OUT test point is used to monitor the output signal of the LPF stage before passing through the data slicer.

These test points are used for ground connections.

The DCDC_OUT test point is used to monitor the DCDC_OUT signal from U1−22 DC_DC_OUT terminal.

- POWER TP4

This test point is used to connect the output voltage of the power supply to the TRF6901 RF EVM. The nominal values for the external power supply are from 6 V to 8 V.

- RSSI TP5

The RSSI test point is used to monitor the RSSI level from U1−41 RSSI_OUT terminal.

- CLOCK TP6

The CLOCK test point is used to monitor the clock signal from the PC parallel port (P2) that connects to U1−18 CLOCK terminal.

- DATA TP7

The DATA test point is used to monitor the DATA signal from the PC parallel port (P2) i.e., the words (see Chapter 3, TRF6901 RF EVM Control Software) sent from the control software of TRF6901. This test point connects to U1−20 DATA terminal.

- STROBE TP8

The STROBE test point is used to monitor the STROBE signal from the PC parallel port (P2). This test point connects to U1−19 STROBE terminal.

- TXDATA TP9

The TXDATA test point is used to monitor the transmitted data coming from PC parallel port (P2). This test point connects to U1−32 TX_DATA terminal.

2-17

Adjustments

STDBY TP10

The STDBY test point is used to monitor the STDBY signal from the PC parallel port (P2). This test point connects to U1−26 STDBY terminal.

- MODE TP11

The MODE test point is used to monitor the MODE signal from the PC parallel port (P2). This test point connects to U1−21 MODE terminal.

- LRNHOLD TP12

The LRNHOLD test point is used to monitor the LRNHOLD signal from the PC parallel port (P2). This signal determines whether the TRF6901 is in LEARN mode or HOLD mode. This test point connects to U1−39 LEARN/HOLD terminal.

- EX_MODE TP13

The EX_MODE test point allows inputting the MODE signal externally from another source into U1−21 MODE terminal.

- EX_STDBY TP14

The EX_STDBY test point allows inputting the STDBY signal externally from another source into U1−26 STDBY terminal.

2.11 Adjustments

- EX_TXDATA TP15

The EX_TXDATA TP is used to inject data from an external source into U1−32 TX_DATA terminal. This test point is utilized during the FSK modulation and transmitter test (see Chapter 3, TRF6901 RF EVM Control Software).

- BRNOUT TP16

The BRNOUT test point is used to monitor the signal from U1−45 DET_OUT terminal. This signal indicates whether the brownout detector is activated.

- RXDATA TP17

The RXDATA test point is used to monitor the received data from U1−33 RX_DATA. This test point is used during the receiver testing (see Chapter 3, TRF6901 RF EVM Control Software).

Resistor R43 is varied to adjust the VCC1 voltage applied to U1 (TRF6901).

2-18

2.12 LED Indicators

LED Indicators

- VCC1 LED3

If JP6 is installed, the VCC LED is illuminated when voltage is applied to U1.

- ENABLE LED1

The ENABLE LED is illuminated when the STDBY line from computer is in a high state. The STDBY line is in a high state when the TRF6901 is commanded to STDBY.

- BRNOUT LED2

Indicates whether the brownout detector is activated.

2-19

2-20

Chapter 3

    "#

This chapter describes the installation and use of the TRF6901 RF EVM control software. The features and functionality of this tool are described.

Topic Page

3.1 TRF6901 RF EVM Control Software Overview 3-2. . . . . . . . . . . . . . . . . . .

3.2 TRF6901 RF EVM Control Software Installation 3-2. . . . . . . . . . . . . . . . . .

3.3 TRF6901 RF EVM Setup With Control Software 3-2. . . . . . . . . . . . . . . . . .

3.4 How to Use the TRF6901 Control Software 3-3. . . . . . . . . . . . . . . . . . . . . .

3.5 Main Program Screen 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.6 IC Layout Screen 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.7 Testing the Transmitter 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.8 Testing of the Receiver 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 RF EVM Control Software

3-1

TRF6901 RF EVM Control Software Overview

3.1 TRF6901 RF EVM Control Software Overview

The TRF6901 comes with control software that is designed to control the TRF6901 EVM ISM-band transceiver IC by PC via the parallel port. This software is a Windows-based GUI interface that allows the user to control different components and settings of the transmitter and receiver. This software also has the capability of running an FSK test. This software is an effective tool for evaluating the TRF6901. The user can connect measuring and testing equipment to the TRF6901 EVM and use this software to observe different parameters and features of the TRF6901.

3.2 TRF6901 RF EVM Control Software Installation

The software is intended for use in either a Windows 95/98 or Windows NT/2000 environment. The IOPort.sys driver is needed for computers running either Windows NT or Windows 2000 operating system. The user must put the IOPort.sys driver in the directory c:\WINNT\system32\drivers write to the parallel port. However, if the operating system is Windows 95/98, the software application can run on its own.

Both the Windows NT/2000 Driver and the TRF6901 software are provided on disk. Your system administrator must install the Windows NT/2000 driver if you do not have administrative rights to the computer. The TRF6901 can run from the floppy disk by following these steps:

in order to

1) Click on the Start Button on the desktop.

2) Click on the Run button.

3) Type A:\ TRF6901.exe and press OK. Or you can:

1) Open the My Computer icon on the desktop.

2) Open the A:\ directory.

3) Right click on TRF6901.exe.

4) Paste TRF6901.exe onto the desktop.

Note:

This software is available on the CD ROM and a floppy diskette.

3.3 TRF6901 RF EVM Setup With Control Software

The 3.5-inch diskette supplied with the TRF6901 contains the control software required to demonstrate the TRF6901. Complete the following steps to set up the TRF6901 for evaluation.

3-2

1) Place the 3.5-inch diskette into the floppy disk drive of the computer being used to evaluate the TRF6901.

2) Follow the installation instructions described in TRF6901 RF EVM Control Software Installation.

3) Connect a DB25 female to DB25 male cable between the TRF6901 evaluation board and the PC parallel port. The DB25 female end of the cable is connected to the TRF6901. The DB25 male end of the cable is connected to the desired LPT port of the PC (LPT1 or LPT2).

4) Connect a dc power supply capable of 8 V 200 mA between the red power supply terminal and ground on the TRF6901 evaluation board.

5) Verify that the power supply output is set between 6 V and 8 V.

6) Turn the power supply on.

7) If the jumper at JP6 is installed, verify that LED3 (the red power-on LED) is illuminated.

8) Run the TRF6901.exe file on the PC.

9) Press the Send All Words (F7) button on the program screen.

3.4 How to Use the TRF6901 Control Software

How to Use the TRF6901 Control Software

The main program screen appears when you open the TRF6901.exe file. The TRF6901 control software has two screens, the main program screen, and the IC layout screen. The main program screen and the IC layout screen offer the same functionality, with the only major difference being that the IC layout screen is a replica of the TRF6901 block diagram.

3.5 Main Program Screen

The main program screen is divided into six main parts: Synthesizer, Mode Options, Operating Modes, Help, Words, and Operation Mode. All the fields in each section can be changed either by typing in the box or by double clicking it.

TRF6901 RF EVM Control Software

3-3

Main Program Screen

Figure 3−1.Main Program Screen

Transmit Frequency for Transmit Mode or LO Frequency for Receive

Crystal or Clock Frequency

Output

Frequency Set

Reference

Divider Set

Crystal Reference Divide

dc-dc Clock Divider

Buffer Clock Divider

dc-dc Clock Divider Set

Buffer Clock Divider Set

Double Click Here With the Left Mouse Button to Obtain the IC Layout Form

Note: When words are displayed in RED, it indicates that you need to send the change to the TRF6901. Pressing the Word A, B,

C, D, or the Send All Words Button sends the update to the TRF6901.

3.5.1 Synthesizer

The following is a brief summary of the controls in this section.

- Output Frequency {Desired Freq.}

Sets the output frequency to the value typed inside the field. In transmit mode, the desired frequency is the frequency of the signal transmitted out of the P A. In receive mode the desired frequency is the LO frequency for the mixer. The appropriate frequency range for TRF6901 is 860 MHz to 930 MHz.

Note:

This field is used with the Set button right below the box. Press the Set button before clicking Send Words to make sure that the entry is valid.

- Output Frequency Set Button {Set} (Beside Divide by-N field)

This button checks the frequency entered by the user to make sure that it is a multiple integer of the reference frequency. Click this button after

3-4

Main Program Screen

entering the des i r e d frequency. If the entered frequency is not a multiple of the reference frequency, then it is rounded down to the closest frequency that satisfies this requirement.

- Feedback Divider {Div−by N}

The software calculates the feedback divider from the desired frequency, crystal clock frequency, and the reference divider value of the integer-N PLL. This field cannot be edited.

- Crystal Frequency {Crystal Freq.}

The default crystal installed on the TRF6901 RF EVM board is 20 MHz, hence the default value for this field is 20 MHz. It can be varied from 10 MHz to 20 MHz. For example, if the user removes the 20-MHz crystal and instead installs a 15-MHz crystal on the TRF6901 RF EVM, then the frequency entered in this field should be 15 MHz.

Note:

Input the frequency of the crystal that has been installed on the TRF6901 RF-only board. Changing the crystal frequency also changes the reference frequency which effects the output frequency. Hence, by changing the crystal frequency, the contents of the the output frequency may change.

- Reference Divider {Refer. Divider}

Sets the crystal reference divider. The typical range for this parameter is 2−255. Any number entered that is equal to 0, 1, or is greater than 255 causes an error message ERR to display. In this state, the control software does not allow to Send Words. To erase the message, highlight the ERR message by holding on to the left button of the mouse and then type in the desired number. The arrows to the right of the box can also be used to change the parameter.

Note:

This field is used with the Set button right next to the box. Press the Set button before clicking Send Words to make sure that the entry is valid.

- Reference Frequency Set Button {Set} (Beside Refer Divider Field)

This button checks whether the output frequency entered is a multiple integer of the reference frequency. Click this button after entering the reference frequency. If the output frequency is not a multiple of the reference frequency, then the output frequency is rounded down to the closest frequency that satisfies this requirement.

- dc-dc Converter Clock Divider {dc-dc Clk Divider}

Sets the dc-dc converter clock divider . The typical range for this parameter is 2−254. Any number entered that is equal to 1, is greater than 254 or is an odd number causes an error message ERR to display after the Set button is pressed. In this state, the control software does not allow to Send

TRF6901 RF EVM Control Software

3-5

Main Program Screen

Words. To erase the message, highlight the ERR message by holding on

to the left button of the mouse and then type in the desired number. The arrows to the right of the box, which increments are divided by 2, can also be used to change this parameter. Inputting 0 causes the dc-dc converter to turn off.

Note:

This button is used with the Set button right next to the box. Press the Set button before sending words to make sure that the entry is valid.

- dc-dc Clock Divider Set {Set} (Next to the dc-dc Clk Divider Box)

This button should be pressed after entering the dc-dc Clk divider. The software checks the entry and makes sure that it is within constraints.

Note:

This does not Send Words, since the changed bits still remain highlighted even after pressing this button.

- Buffer Clock Divider {Buffer Clk Divider}

Sets the buffer clock divider. The typical range for this parameter is 2 to 6 2 . Any number entered that is equal to 1, is greater than 62, or is an odd number causes an error message ERR to display after the Set button is pressed. In this state, the control software does not allow to Send Words. To erase the message, highlight the ERR message by holding on to the left button of the mouse and then type in the desired number. The arrows to the right of the box, which increment by divider by 2, can also be used to change this parameter. Inputting 0 causes the buffer clock to turn off.

Note:

This button is used with the Set button right next to the box. Press the Set button before sending words to make sure that the entry is valid.

- Buffer Clock Divider Set {Set} (Next to the Buffer Clk. Divider Box)

This button should be pressed after entering the Buffer Clk Divider.

Note:

This button checks the entry and makes sure that it is within constraints. This does not Send Words, since the changed bits still remain highlighted even after pressing this button.

3.5.2 Mode Options

3-6

This section allows you to control the TRF6901. The following is a brief summary of the 11 controls:

Main Program Screen

Power Amplifier {Power AMP}

Allows the power amplifier to be set to 0-dB, 10-dB, and 20-dB attenuation. The user can observe the changes caused by this feature with the use of a spectrum analyzer.

- Receive/Transmit Mode {RX/TX}

Sets the IC to receive or transmit mode. The MODE selects appropriate registers (A and D or B and C) at a time while RX/TX only impacts bit 5 of Word A in Mode 0 and bit 5 of Word B in Mode 1.

Note:

Keep in mind that this field is not related to MODE under the Operating Mode section.

- Charge Pump Current {CP Current}

Allows the charge pump current to be set to 0.5 mA, 1 mA, or 0.25 mA.

- dc-dc Converter Enable {dc-dc Conv}

Turns the dc-dc converter On or Off. Enables or disables the dc-dc clock divider and the dc-dc clock divider set.

- Buffer Clock Enable {Buffer Clk}

Turns the buf fer clock on or off. Enables or disables the buffer clock divider and the buffer clock divider set.

- Modulation Select {Modulation}

Sets the modulation to FSK or OOK.

- Brownout Detector Enable {Brn Out}

Sets the brownout detector on or off. Enables or disables the (brownout voltage) settings.

- Brownout Detector Threshold Voltage {Brn Out Voltage}

Allows the threshold voltage for the brownout detector to be set to 1.8 V, 2 V, 2.2 V, or 2.4 V.

- XTAL Internal Tuning Capacitor {Internal Cap}

Allows the desired XTAL frequency to be fine-tuned by setting the value of an internal trim capacitor. The capacitor can be set to 13.23 pF, 15.56 pF,

17.9 pF, 20.23 pF, 22.57 pF, 24.9 pF, 27.24 pF, or 29.57 pF.

- Demodulator Tune {Tune}

Allows the resonant frequency of the external demodulation tank to be tuned. Default is 000.

- Reset Signal for the PFD {Reset PFD}

Selects the reset signal to be derived from the XTAL (crystal) or derived from the feedback divider (/N).

TRF6901 RF EVM Control Software

3-7

Main Program Screen

3.5.3 Operating Modes

This section allows the user to do the following:

- MODE

- STDBY

- Learn/Hold

Select mode 0 or mode 1. These two modes are independent of each other and allow a user to save two different TRF6901 settings. In other words, the user, while in mode 0, can type in the desired parameter to set the TRF6901 to transmit a signal and then change the mode to 1 and enter the parameters to set the TRF6901 to receive a signal. Another way of using MODE, is to have two dif ferent transmit frequencies stored in MODE, and by toggling between 0 and 1, the user can observe the change in frequency on the spectrum analyzer.

Turns the TRF6901 IC on or to standby.

Sets the data slicer to LEARN or HOLD mode. During LEARN mode, the data slicer is constantly integrating the incoming

signal and charging C10 (see the schematic diagram) to a dc voltage level

) that is proportional to the average demodulation dc level. Capacitor

ref

C10 is connected to terminal 34 of the TRF6901 (SLC_CAP). During HOLD mode, the data slicer stops integrating and uses the

dc-voltage level stored on capacitor C10 as the decision threshold between logic 1 and logic 0 as measured on terminal 33 RX_DATA. For receiver measurements, the output of terminal 33 RX_DATA is measured at the RXDATA test point (TP17).

- TX DATA

Sets the TX data output high or low. This option allows the user to observe the deviation between the

frequencies for transmitting 1 and 0 if the output connector J2 of TRF6901 EVM is connected to a spectrum analyzer.

- LPT_X

Set the LPT to port 1 or port 2.

- Clock Width

Sets the pulse width for the data and clock signals.

3-8

- Strobe Width

Sets the pulse width for the strobe signal. The clock and strobe width operations allow the user to alter the timing of

the words and hence the baud rate through the PC parallel port.

3.5.4 Help Box

3.5.5 Words

Main Program Screen

Gives a brief description of each control box. For example, clicking on the Reset PFD box in the Mode Options section, the Help Box reads:

Reset Signal for the PFD 0: Derived from XTAL

1: Derived from /N Valid in Mode 0 or 1.

Most of the other control boxes follow this format. The first line indicates what portion of the TRF6901 is controlled. The next two lines indicate the bit value. The last line indicates that the control works in mode 0 and 1.

Double clicking the Help box activates the IC layout screen.

This section updates the binary words after changes are made to the control options. Clicking on the box next to the word can individually send each word. Clicking Send Words Now or pressing F7 sends all the words to the TRF6901.

3.5.6 Operation Mode

Operation Mode shows if:

This field cannot be edited.

3.5.7 The Menu Bar

The Menu Bar has three options: File, Edit, and Help.

- File Menu

- Edit Menu

- Help Menu

The TRF6901 is enabled or disabled. The transmit (TX) data line is on or off. Mode is 0 or 1.

Allows the user to open a file, save a file, and close the program. Hence, the users can store their preferred settings in a file and then restore it conveniently any time.

Allows the user to edit, copy, or paste data.

Allows the user to view the Help file, and the About file.

TRF6901 RF EVM Control Software

3-9

IC Layout Screen

3.6 IC Layout Screen

Figure 3−2 shows the IC layout screen of the TRF6901 control software. Double clicking the Help window on the main program screen with the left mouse button, displays the IC layout screen. The IC layout screen is a replica of the main program screen of the program that gives the user a convenient environment to control the TRF6901 IC. All changes on either form, are updated promptly on both forms. This form consists of three sections.

Figure 3−2.TRF6901 IC Layout Screen

Transmit Frequency

for Transmit Mode or

LO Frequency for

Receive Mode

Output Frequency Set

Brownout

Detector Enable

dc-dc

Converter Enable

Clicking Here Sets

the Power Amp Attn.

(0 dB, 10 dB, or 20 dB)

Mode Select

(0 or 1)

/A, /B and /N Divider

Press to Select Learn or Hold Mode

dc-dc Converter Divider

dc-dc Converter Divider Set

Buffer Clock Divider

Buffer Clock Enable

Buffer Clock Divider Set

Crystal Reference Divider Set

Crystal Frequency

Crystal Reference Divider

Press to Program

the TRF6901

Turn TXDATA Terminal High or Low

3.6.1 Main IC Layout Form

The main IC layout form has the following options.

- Desired Output Frequency {Desired Freq.}

This field is similar to the Desired Freq. field on the main program screen. It sets the output frequency to the value typed inside the field. The appropriate frequency range for TRF6901 is 860 MHz to 930 MHz.

Note:

This field is used with the Set button right next to the box. Press the Set button before clicking Send Words to make sure that the entry is valid.

- Output Frequency Set Button {Set} (Beside the Desired Freq. Field)

This button checks the output frequency to make sure that it is a multiple integer of the reference frequency. Click this button after entering the

Closes the Window and Returns to the Main Screen

Press to Start FSK or OOK Test

Select FSK or OOK Modulation

Operating or Standby. The IC is Off in Standby

3-10

IC Layout Screen

desired frequency. If the entered output frequency is not a multiple of the reference frequency , t hen it is rounded down to the closest frequency that satisfies this requirement.

- LEARN/HOLD Mode Button

This button toggles the data-slicer in the TRF6901 IC between LEARN and HOLD mode and performs the same function as the LEARN/HOLD field on the main program screen.

- Brownout Detector Enable {Brownout Detector}

By clicking on the Brownout Detector box, the user can turn it on or off. If the out detector is colored black, then it is turned off and when it is colored white, it is turned on. The default status of brownout detector is Off. The brownout field on the main program screen has the same functionality.

- DC-DC Converter Enable {dc-dc Converter}

By clicking on the dc-dc Converter box, the dc-dc converter can be enabled or disabled. If the dc-dc Converter box is colored black, then it is turned of f . When it is colored white, it is turned on. The default status of the dc-dc converter is off. The dc-dc Conv field on the main program screen has the same functionality.

- Buffer Clock Divider Enable {Clk Buffer}

By clicking on the Clk Buffer arrow, the buffer clock divider can be enabled or disabled. If the Clk Buffer is colored black, then it is turned off. When it is colored green, it is turned on. The default status of buffer clock divider is off. The Buffer Clk field on the main program screen has the same functionality.

- Feedback Divider, A Counter, and B Counter {/N, /A. /B}

These fields are automatically calculated by the software and displayed on the IC layout screen. These fields cannot be edited by the user. However, the user can vary the crystal frequency, output frequency, and the reference divider to change these parameters.

- DC-DC Clock Divider {/L 2..254}

This field represents the dc-dc clock divider value and is similar to dc-dc Clk Divider on the main program screen. This field can be edited after the

dc-dc converter has been enabled.

- DC-DC Clock Divider Set Button {Set} (Right Next to dc-dc Clock Divider

Field)

This button is similar to the dc-dc Clock Divider Set button on the main program screen. For more details, please see the Synthesizer section of this chapter.

TRF6901 RF EVM Control Software

3-11

IC Layout Screen

Buffer Clock Divider {/K 2..62}

This field represents the buffer clock divider value and is similar to Buffer Clk on the main program screen. This field can be edited after the clock

buffer has been enabled.

- Buffer Clock Divider Set Button {Set} (Right Next to Buffer Clock Divider

Field)

This button is similar to the Buffer Clock Divider Set button on the main program screen. For more details, please see the Synthesizer section of this chapter.

- Crystal Frequency {Crystal Freq.}

This field is similar to Crystal Freq. field on the main program screen. The allowable range is 10 MHz to 20 MHz.

- Reference Divider {/Ref 2..255}

This field sets the value for the reference divider and is similar to the Refer. Divider field on the main program screen.

Note:

3.6.2 Options

This field is used with the Set button right next to the box. Press the Set button before clicking Send Words to make sure that the entry is valid.

- Reference Frequency Set Button {Set} (Beside the /Ref. Box)

This button checks the output frequency to make sure that it is a multiple integer of the reference frequency. Click this button after entering the reference frequency. If the output frequency is not a multiple of the reference frequency , then it is rounded down to the closest frequency that satisfies this requirement.

- Power Amplifier {Power Amp:}

By clicking on the power amplifier, the user can set the attenuation level for the output signal. The Power Amp field on the main program screen performs a similar function.

The Options Sections consists of the following:

- Mode 0/1

By clicking on this button, the user can toggle the mode of the TRF6901. This field is similar to the MODE field on the main program screen.

3-12

- TXDATA 0/1

This button toggles the TX_DATA terminal of the TRF6901.

- Operating/Powerdown

This button enables or disables the TRF6901 IC. This field is similar to the STDBY field on the main program screen.

3.6.3 FSK/OOK Test

Testing the Transmitter

Send Words

This button is similar to Send All Words (F7) button on the main program screen and it sends out A, B, C, and D words to the TRF6901 through the parallel port.

- Close

This button closes the IC layout form and returns to the main program screen.

The FSK/OOK Test section consists of the following:

- Pulse Frequency {PRF (Hz)}

This field sets the frequency of the TX_DATA pulses that are fed to the TRF6901 during the FSK/OOK test. The pulse repetition frequency is always set to 100 Hz, which corresponds to an NRZ bit rate of 200 bps. This field cannot be modified. This feature is for the users convenience to observe low-data rate FSK spectrum.

In order to test the transmitter at the desired data rate, it is recommended that the user feed the modulating signal via a signal generator to the TP15 EX_TXDATA test point with the desired frequency. More details are covered in the Testing the Transmitter section.

- FSK Test Duration {Run Time (sec)}

This field displays the FSK test duration. It is always set to 20 seconds and cannot be modified.

- FSK or OOK Test Select {FSK/OOK}

The user can toggle between FSK and OOK test by using this button.

- Execute FSK/OOK Test {FSK/OOK Test}

This button starts the FSK/OOK test. The test continues for the duration that is specified in the Run Time field. The user cannot change any component status or field value during this interval.

3.7 Testing the Transmitter

To perform test of the transmitter section of the TRF6901, perform the following steps.

3.7.1 Step 1: Test Setup

Set up the test bench as shown in Figure 3−3. Although 868-MHz quarter-wave antennas can be used for this test, for the best results, it is recommended to use RF cables to connect various equipment to the TRF6901 RF EVM. The antennas are more applicable during the system mode test detailed in Chapter 7.

TRF6901 RF EVM Control Software

3-13

Testing the Transmitter

Figure 3−3.Equipment Setup for Testing of the TRF6901 EVM Transmitter

PC with TRF6901

Control Software

Installed

PC Printer Port

(LPT1 or LPT2)

Cable DB25M to DB25F

Spectrum Analyzer

DB25M

(Male)

TRF6901

Evaluation

Board

3.7.2 Step 2: Software Programming

For testing the TRF6901 transmitter section in the FSK mode, set the main program screen and the IC layout screen as shown in Figure 3−4 and Figure 3−5.

Figure 3−4.Main Programming Screen Setup for Testing the Transmitter

3-14

Figure 3−5.IC Layout Screen Setup for Testing the Transmitter

Clicking Here Sets

the Power Amplifier

Attenuation (0 dB, 10

dB, or 20 dB)

Testing the Transmitter

After setup is c o m p l e t e , p r e s s t h e Send Words button on the IC layout screen or the Send All Words (F7) button on the main program screen to send the programming words to the TRF6901.

TRF6901 RF EVM Control Software

3-15

Testing the Transmitter

3.7.3 Step 3: Spectrum Analyzer Setup

Set up the spectrum analyzer to observe the following figure.

Figure 3−6.Carrier Signal on the Spectrum Analyzer

Output Power

is Less Due to

Loss in Cable

3-16

3.7.4 Step 4: FSK Modulation Output Test

The FSK deviation for the TRF6901 is set externally by C24 to approximately ±50 kHz. To run an FSK test:

1) Click the Send Words button from the main program screen or the IC layout screen.

2) From the IC layout screen, click on FSK Test.

3) Set up the spectrum analyzer to observe the spectrum analyzer display as shown in Figure 3−7.

Figure 3−7.FSK Output From Transmitter

Testing the Transmitter

TRF6901 RF EVM Control Software

3-17

Testing the Transmitter

Figure 3−8.Equipment Setup for FSK Test With an External Modulation

PC with

TRF6901 Software

Installed

Cable DB25M to DB25F

PC Printer (LPT1 or LPT2)

Power

Supply

DB25M

3 V

Pulse generator output waveform

16 kHz

(Male)

GND TP2

Pulse Generator

3.7.5 FSK Test Using an External Source

To use an external pulse generator to supply transmit data, set up the test bench as shown in Figure 3−8.

Perform the FSK modulation output test as described in the previous section. In this new setup, an external pulse generator provides modulation. The FSK Test button on the IC Layout screen does not need to be pressed to start the FSK Test.

At a data modulation rate of 16 kHz (corresponding to a NRZ bit rate of 32 kbps), set the reference divider to 100 or less (corresponding to a reference frequency of 200 kHz or higher). It is necessary that the PLL loop filter bandwidth be greater than the data modulation rate. For the TRF6901 EVM, the PLL loop filter bandwidth is designed to be approximately 20 kHz, which is greater than the required 16 kHz. As a general rule of thumb, the reference frequency should be at least five times greater than the PLL loop filter bandwidth. A reference frequency of 200 kHz exceeds this requirement.

TRF6901

Evaluation

Board

TXDATA TP9

Coaxial cable with clip lead ends

Spectrum Analyzer

3-18

The nominal frequency deviation for the TRF6901 EVM is approximately ±50 kHz and is set by the capacitor connected to terminal 31.

Figure 3−9.FSK Output From Transmitter With an External Modulation

Testing the Transmitter

TRF6901 RF EVM Control Software

3-19

Testing of the Receiver

3.8 Testing of the Receiver

Figure 3−10. Test Setup for TRF6901 EVM Receiver Testing

3 V

Pulse Generator Output waveform

PC with

TRF6901 Control

Software Installed

PC Printer Port (LPT1 or LPT2)

16 kHz

Cable DB25M to DB25F

3.8.1 Test Equipment Setup

Connect the TRF6901 RF EVM as shown in Figure 3−10. Set the channel of digital or analog oscilloscope to 20 µs Time/Division and 1 V/Division. Set the external signal generator according to the following:

Pulse

Generator

Power Supply Voltage = 8 V

Power

Supply

DB25M

(Male)

TRF6901

Evaluation

Board

Oscilloscope

RX_IN

RXDATA TP17

External Modulation

Input Signal Generator

RSSI TP5

Voltmeter

−

GND TP2

Center frequency 868 MHz FM frequency deviation from carrier ±50 kHz External modulation input 16 kHz Signal level −60 dBm

Do not feed a signal greater than −40 dBm, or it may overdrive the LNA in the TRF6901.

3-20

3.8.2 Software Programming for Receiver Testing

Set up the main program screen and the IC layout screen as shown in Figure 3−11 and Figure 3−12.

Figure 3−11. Main Program Screen Setup for Receiver Testing

Transmit Frequency for Transmit Mode or

LO Frequency for Receive Mode

When Bits are Colored Red Then the Send All Words

(F7) Button Must Be Pressed to Update the Changes

Testing of the Receiver

Note: The signal received by the TRF6901 has a frequency of 868 MHz. The TRF6901 is using a 10.7-MHz IF frequency.

Therefore, the local oscillator (LO) is set to a frequency of 878.7 MHz.

LO Frequency = RF Frequency + IF Frequency = 868 MHz + 10.7 MHz = 878.7 MHz

The desired frequency block of the TRF6901 software control program is used to set the internal VCO frequency of the TRF6901. (See the Block Diagram)

TRF6901 RF EVM Control Software

3-21

Testing of the Receiver

Figure 3−12. IC Layout Screen for the Receiver Testing

Press to Select

Learn or Hold Mode

Press to Program

the TRF6901

3.8.3 LEARN and HOLD Modes

Set the data slicer to LEARN mode. Received data is viewable through the RX_DATA terminal in HOLD mode for

the data slicer. In practical applications, the data slicer is in LEARN mode until a valid training sequence (see TRF6901 RF Tool Kit System Mode) from the receiver is recognized. The data slicer is then switched to the HOLD mode. It is switched back to the LEARN mode as soon as the transmission of the data packet is complete.

3-22

3.8.4 Measured Receive Data

The data plots in Figure 3−13 and Figure 3−14, show the measured receive data at the RXDATA test points for input signals at –50 dBm and –90 dBm, respectively.

Figure 3−13. RXDATA Signal at −50-dBm Input Signal to the Receiver

Testing of the Receiver

TRF6901 RF EVM Control Software

3-23

Testing of the Receiver

Figure 3−14. RXDATA Signal at −90-dBm Input Signal to the Receiver

3-24

Chapter 4

 "   

This chapter provides an overview of the TRF6901 serial port module supporting the TRF6901 RF EVM.

Topic Page

4.1 Purpose 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 TRF6901 Serial Port Module Description 4-2. . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 Serial Port Tool Overview

4-1

Purpose

4.1 Purpose

The TRF6901 serial port module is intended to permit a user of the TRF6901 RF EVM to observe the performance of the TRF6901 via the programming tool software as well as to observe the real-time operation of the TRF6901 in an RF link example. The TRF6901 serial port module is contained along with the TRF6901 RF EVM in the TRF6901 RF tool kit. See Figure 4−1 for the TRF6901 RF tool kit.

Figure 4−1.TRF6901 RF Tool Kit

To PC Serial Port

4.2 TRF6901 Serial Port Module Description

The TRF6901 serial port module (symbolized as Baseband Board) is based on the TI MSP430F149 ultralow power flash based micro controller. Firmware in the MSP430 maintains serial communication to the PC by an internal hardware UART and performs TRF6901 device programming through a general-purpose I/O port. The primary connector SV1 on the left of the board interfaces to the TRF6901 RF EVM. This connector receives power from the TRF6901 RF EVM as well as provides communication and control signal lines to the TRF6901 RF EVM. The serial port connector on the right of the board interfaces the MSP430 to a standard PC COM port.

4-2

Chapter 5

 "    !

This chapter describes the PCB hardware of the TRF6901 serial port module. The PC serial interface, MSP430 micro controller, TRF6901 RF EVM interface SV1, control interface J12, JTAG interface J13, miscellaneous MSP430 port terminals, and the LED status indicators are discussed.

Topic Page

5.1 Hardware Overview 5-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 PC Serial Port Interface 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 MSP430 Features 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.4 TRF6901 SV1 interface 5-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.5 Control Signal Interface J12 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.6 JTAG Interface J13 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.7 Miscellaneous MSP430 Port Terminals 5-7. . . . . . . . . . . . . . . . . . . . . . . . . .

5.8 LED Status Indicators 5-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 Serial Port Module PCB Hardware

5-1

Hardware Overview

5.1 Hardware Overview

The TRF6901 serial port module’s primary feature is the functionality of the MSP430. The MSP430 controls the module’s operation in both evaluation and system modes. This allows the user to evaluate the performance of the TRF6901 on the TRF6901 RF EVM, or if the user is in possession of two RF tool kits, it permits the user to observe a real-time frequency shift keying (FSK) RF link operation with the TRF6901 RF EVM. Furthermore, if users are familiar with the MSP430 micro controller family and are in possession of the MSP430 flash emulation tool, they may develop firmware routines and download them to the MSP430 through the JTAG connector (J13). In addition, LED signals and connectors permit users to observe status conditions on the board.

5-2

Figure 5−1.TRF6901 Serial Port Module Schematic

Hardware Overview

TRF6901 Serial Port Module PCB Hardware

5-3

Hardware Overview

Figure 5−2.TRF6901 Serial Port Module Top Level Layout

5-4

5.2 PC Serial Port Interface

The PC serial port interface connector J30 on the right side of the board connects to a standard 9-terminal serial port cable connector. From the connector, signal levels are adjusted via two 6N130 opto-isolators to eliminate noise from coupling from the PC to the TRF6901, as well as prevent damage to the MSP430 hardware UART.

5.3 MSP430 Features

The device included on the TRF6901 serial port module is the MSP430F149. See the MSP430x13x, MSP430x14x Mixed Signal Microcontroller data sheet, literature number SLAS272 and the MSP430x1xx Family User’s Guide, literature number SLAU049 for microcontroller details. The MSP430F149 is a 16-bit RISC architecture micro controller with the following additional features:

- 12-Bit A/D Converter With Internal Reference, Sample-and-Hold and

Autoscan Feature

- 16-Bit Timer With Seven Capture/Compare-With-Shadow Registers,

Timer_B

PC Serial Port Interface

- 16-Bit Timer With Three Capture/Compare Registers, Timer_A

- On-IC Comparator

- Hardware UART

- 60KB + 256B Flash Memory, 2-KB RAM

- These features along with the five power-saving modes

In implementing the FSK RF link, many of these features are used with exceptional ease.

TRF6901 Serial Port Module PCB Hardware

5-5

TRF6901 SV1 Interface

5.4 TRF6901 SV1 Interface

The TRF6901 serial port module SV1 interface is the direct connection to the TRF6901 RF EVM. See Figure 5−3 for terminal connections.

Figure 5−3.SV1 Terminal Connections

11 ACTIVE/STDBY Digital output from the MSP430 for controlling the state of the TRF6901. 1, 5, 8, 16,

18, 19 20 15 CLOCK Digital output from the MSP430 for the serial programming to the TRF6901 14 DATA Digital output from the MSP430 for the serial programming to the TRF6901 3 DET_OUT Digital output from the TRF6901 RF EVM displaying the state of the

9 LEARN/HOLD Digital output from the MSP430 for the TRF6901 receive path 17 LPF_OUT TRF6901 low-pass filter amplifier output to MSP430 10 MODE Digital output from the MSP430 for selection on transmit or receive 6 N/C 2 RSSI Analog signal from the TRF6901 RF EVM 4 RX_DATA Digital output from the TRF6901 RF EVM displaying the state of the

13 STROBE Digital output from the MSP430 for the serial programming to the TRF6901 12 TX_DATA Digital output from the MSP430 for controlling the state of the power

7 VCC Regulated supply from the TRF6901 RF EVM

AGND This is the analog ground supplied for the entire board.

CLK_OUT

TRF6901 Xtal buffered clock output to the MSP430

TRF6901 Brownout detector

TRF6901 data slicer

amplifier (PA) output of the TRF6901.

5-6

5.5 Control Signal Interface J12

Interface (J12) duplicates signals that appear from the SV1 connector . Signals can be easily viewed at this interface with an oscilloscope, or if configured as high impedance inputs using the programming tool, control signals MODE, ACTIVE/STDBY, TXDATA, and LEARN/HOLD can be driven at their corresponding interface terminal.

5.6 JTAG Interface J13

Interface (J13) is the JTAG interface to the MSP430. Through this interface, the user may reprogram the MSP430 with the MSP430 flash emulation tool. See the Reprogramming of the MSP430F149 section in chapter 7 for more details.

5.7 Miscellaneous MSP430 Port Terminals

Terminals (J18, J19, and J21) are direct connections from MSP430 ports 1, 4, and 6. These signals can be used if the user reprograms the MSP430 flash firmware. They are useful for debugging code execution as well as for implementing additional functional features such as ADC measurements of the RSSI signal.

5.8 LED Status Indicators

On the TRF6901 serial port tool module, there are eight LED status indicators. Four indicators reflect the control signals applied to the TRF6901 RF EVM, and one indicates when a programming sequence is actively being sent to program the TRF6901. The remaining three LEDs are for future features. See Figure 5−4 for LED indicators.

TRF6901 Serial Port Module PCB Hardware

5-7

LED Status Indicators

Figure 5−4.TRF6901 Serial Port Module LED Indicators

5-8

Chapter 6

    "$% 

This chapter describes the system mode operation of the currently implemented RF link. This chapter gives the user a brief overview of the RF link protocol.

Topic Page

6.1 TRF6901 RF Tool Kit System Mode Overview 6-2. . . . . . . . . . . . . . . . . . . .

6.2 System Mode Description 6-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 RF Tool Kit System Mode

6-1

TRF6901 RF Tool Kit System Mode Overview

6.1 TRF6901 RF Tool Kit System Mode Overview

The TRF6901 RF tool kit features an application example for an RF link. This mode is called the system mode. In this mode, the MSP430F149 populated on the TRF6901 serial port module is driving the TRF6901 on the RF EVM. With two TRF6901 RF tool kits a simple RF link can be established. This is shown in Figure 6−1.

Figure 6−1.Setup of Two TRF6901 RF Tool Kits in the System Mode

To PC

Serial

Port

6.1.1 Protocol Used by the System Mode RF Link

Data Format RS232: 32-bytes of data = 32 ASCII signs = 256 bits,

Each byte: 1-start bit, 8-data bits, 1-stop bit,

no parity Data Bit Rate RF: 32 kbps Data Format RF: Training (learning) sequence, 1 ms,

consisting of 31.25-µs pulses, followed by

1-start bit, 93.75 µs and the data sequence,

consisting of 2 bytes checksum + 32 bytes of

data Data Coding (PCM): Nonreturn-to-zero (NRZ) Transmission Technique: Bidirectional, half-duplex

To PC Serial Port

6.1.2 Specification Followed for the System Mode RF Link Example

The following specification is used to set up the RF link in the 868-MHz to 870-MHz European ISM band.

RF carrier frequency: 869.3 MHz (see Note) Modulation: 2 FSK, deviation ±50 kHz

Deviation is fixed by hardware on the TRF6901 RF EVM.

IF frequency: 10.7 MHz, 330-kHz bandwidth

6-2

TRF6901 RF Tool Kit System Mode Overview

Note:

TX _DATA = 0 Frequency is set from the mode 0 VCO register settings. TX_DATA = 1 Frequency is adjusted by external components on the

TRF6901 RF EVM. The corner frequency is determined as the center between the two

frequencies.

TRF6901 RF Tool Kit System Mode

6-3

System Mode Description

6.2 System Mode Description

6.2.1 System Mode Tool Kit Configuration

The MSP430F149 device is programmed to emulate a simple RF link. In this mode the user can investigate a simple, bidirectional half-duplex RF-data link. Whenever the TRF6901 serial port module is connected to the TRF6901 RF EVM, this mode is present by default.

6.2.2 System Mode Concerns

When using the TRF6901 RF EVM with the serial port module in the combined tool kit, configuration changes must be made to the TRF6901 RF EVM.

Caution: It is important to remember before connecting the serial port

module and applying power to the combined TRF6901 tool kit, remove jumpers J4 and J5 on the TRF6901 RF EVM and disconnect the parallel port cable if applied to the RF EVM. Otherwise, damage to the serial port module is possible. See System Mode Concerns and Use in chapter 7.

Furthermore, it is important to remember that changes to the hardware configuration on the RF EVM can result in improper operation of the system mode RF link.

6.2.3 System Mode Protocol Basics

In order to establish the RF link, two TRF6901 RF tool kits are required. In addition, at least one tool kit must be connected to a PC via the serial port.

On the PC, the TRF6901 serial port tools software, must be installed. The system mode tool in this software package enables the user together with two TRF6901 tool kits to establish the RF link. The communication protocol is described in detail further in this chapter.

After power up, the MSP430F149 initializes the TRF6901 for the RF link at

868.3 MHz. This means, all four registers of the TRF6901 are reprogrammed. Consult the TRF6901 product description SL WS110 for register descriptions.

As the TRF6901 features two preprogrammable modes, mode 0 is programmed with a VCO frequency of 868.25 MHz as the transmission (TX_DATA=0) frequency, and mode 1 is programmed with a VCO frequency of 879 MHz to enable reception at 868.3 MHZ. The RF link after power up is by default in receive mode. This means that the MSP430 is scanning the frequency band for a valid RF signal.

6-4

Along with being able to receive an RF package, the MSP430 is also ready to receive data from RS232 by interrupt. UART reception allows the RF tool kit to send a data package via RF. As soon as a data package from RS232 has been received (32 bytes), the MSP430F149 calculates the checksum of the data package. This checksum is then added to the RS232 received data package. After switching the TRF6901 to transmit mode, the data is immediately sent off via RF. Another TRF6901 RF tool kit can receive this RF transmitted signal. If this tool kit is connected to another PC terminal program, it displays the received package on the terminal window screen before sending an acknowledgement back to the original sending tool kit.

RF communication is also possible with only one tool kit connected to a PC. In this case, the second tool kit simply acknowledges the RF received package by replying the checksum.

6.2.4 System Mode Communication Flow

The system mode phases of the communication flow between TRF6901 RF tool kits is shown in Figure 6−2.

Figure 6−2.Phases of the Communication Flow

System Mode Description

TRF6901 RF Tool Kit System Mode

6-5

System Mode Description

6.2.5 System Mode Transmission Protocol Details

The RF transmission protocol is shown in Figure 6−3.

Figure 6−3.TX-Data RF Transmission Sequence Control

Training sequence

High

Low

31.25 us

Pulse width corresponds with 31.916kBit/s

Length of the training sequence

Start bit

6-6

TRF6901 RF Tool Kit System Mode

6-7

Chapter 7

 "   "#

This chapter describes the installation and use of the TRF6901 serial port tools software. The features and functionality of both the programming tool and system mode tool are described.

Topic Page

7.1 TRF6901 Serial Port Tools Software Overview 7-2. . . . . . . . . . . . . . . . . . .

7.2 TRF6901 Serial Port Tools Software Installation 7-2. . . . . . . . . . . . . . . . .

7.3 TRF6901 Serial Port Tools Software Main Form 7-2. . . . . . . . . . . . . . . . . .

7.4 TRF6901 Programming Tool 7-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5 TRF6901 System Mode Tool 7-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6 TRF6901 European Frequency Plan Tool 7-14. . . . . . . . . . . . . . . . . . . . . . .

7.7 Reprogramming of the MSP430F149 7-16. . . . . . . . . . . . . . . . . . . . . . . . . . .

TRF6901 Serial Port Tools Software

7-1

TRF6901 Serial Port Tools Software Overview

7.1 TRF6901 Serial Port Tools Software Overview

The TRF6901 serial port tools software contains two tool environments. The first, the programming tool, permits the user to configure the TRF6901 ISM transceiver registers and control signal states. The second, the system mode tool, allows the user to operate the TRF6901 RF tool kit in an RF link operation. For both window environments, communication with the software is implemented from the PC via the RS232 interface to the MSP430 on the TRF6901 serial port module.

Communication uses 19.2 kbps USART communication via the RS232 serial port on the PC. For the programming tool window, MSP430 firmware receives a 32-byte package from the PC and translates the data for TRF6901 register and control signal configuration. Upon applying the serial received data to the TRF6901, the MSP430 firmware sends the 32-byte data package back to the PC as an acknowledge. For the system mode window, MSP430 firmware receives a 32-byte package from the PC and translates the data for the RF link transmission.

If the serial connector communication is not valid or functional, a communication message appears to assist with debugging the problem.

7.2 TRF6901 Serial Port Tools Software Installation

This windows based software is necessary to evaluate the TRF6901 with the TRF6901 serial port module. This software is included in the TRF6901 RF tool kit, and can be installed from the included MSP430 / MSRF CDROM. The setup software can be started from the >> Home >> MSRF−ICset >> Tool Software.

The software runs with Win 95, Win 98, and Win NT.

Installing the TRF6901 Serial Port Tools Software

- Insert the MSP430 / MSRF CDROM.

- Go to >> Home >> MSRF−ICset >> Tool Software. On this page you find

a product table, which contains the TRF6901 serial port tools software.

- By clicking on the link TRF6901 Serial Port Tools Software the setup

software is started.

- Follow the directives from the installation software.

7.3 TRF6901 Serial Port Tools Software Main Form

7-2

The TRF6901 serial port tools software main form provides the user access to the programming tool as well as the system mode tool. Each environment may be selected under Options on the main form’s tool bar.

Figure 7−1.TRF6901 Serial Port Tools Software

TRF6901 Serial Port Tools Software Main Form

7.3.1 Tool Bar Options

Options

Programming Tool: Displays the TRF6901 programming tool System Mode Tool: Displays the TRF6901 system mode tool Exit: Closes all TRF6901 serial port tools windows

and exits the software

TRF6901 Serial Port Tools Software

7-3

TRF6901 Serial Port Tools Software Main Form

Help

About: Displays information regarding the tool software

revision

7-4

7.4 TRF6901 Programming Tool

7.4.1 Programming Tool Binary Input Form

Figure 7−2.Programming Tool Binary Input Form

TRF6901 Programming Tool

7.4.1.1 Tool Bar Options

File

Save: Permits the users to save a current configuration Load: Permits the users to load a specific configuration Exit: Closes all TRF6901 serial port tools windows and exits

Options

Visual: Displays visual block diagram of TRF6901. Changes in

COM Port

Select COM 1: Selects PC COM Port 1 if available and attempts to

Select COM 2: Selects PC COM Port 2 if available and attempts to

Help

the software

the binary input form are reflected on this block diagram. Changes made in the visual form are reflected back to the binary input form.

communicate with the TRF6901 serial port tool module

About: Displays information regarding the programming tool

revision

TRF6901 Serial Port Tools Software

7-5

TRF6901 Programming Tool

7.4.1.2 Program TRF6901 Button

7.4.1.3 Control Settings

Settings are applied for Standby/Active, Mode 1/0, TX Data LOW/HIGH, and Learn/Hold. Control signals can be configured to 1, 0, or Z. 1 or 0, the controlling MSP430 port is configured as an output and is driven high or low. Z, the controlling MSP430 port is configured as to a high impedance input port and can be controlled externally from the J12 connector terminals 5, 7, 9, and 8.

7.4.1.4 VCO F/ Ref. F/ XTAL Settings

Manual numeric entry is applied to the Word A, B, and C selection boxes. If the exact numeric calculation is not matched, the entry box is updated to reflect the applied register settings that are possible.

TRF6901 programmed with current setting.

TRF6901 not programmed with current setting.

UART communication was verified valid.

7.4.2 Programming Tool Block Diagram Use

The programming tool block diagram is currently intended as a visual verification of the states configured in the programming tool main form. The user can set and control components by using the boxes around the block diagram.

Note:

For the fields that use arrows for input selection, make sure that the input is highlighted by clicking once on the view box. The input in the field box becomes blue and the corresponding changes are updated on the binary form.

7.4.2.1 Tool Bar Options

File

Save: Permits the users to save a current configuration Load: Permits the users to load a specific configuration Exit: Closes all TRF6901 serial port tools windows and exits

the software

Options

Binary: Displays TRF6901 binary input form. Changes in the

binary input form are reflected on this block diagram. Changes made in the visual form are reflected back to the binary input form.

7-6

TRF6901 Programming Tool

COM Port

Select COM 1: Selects PC COM Port 1 if available and attempts to

communicate with the TRF6901 serial port tool module.

Select COM 2: Selects PC COM Port 2 if available and attempts to

communicate with the TRF6901 serial port tool module.

Help

About: Displays information regarding the programming tool

revision

7.4.2.2 Standby

Figure 7−3.Programming Tool Block Diagram (Standby Mode 0 − Transmit)

Standby: Modules that become active appear in light blue.

TRF6901 Serial Port Tools Software

7-7

TRF6901 Programming Tool

Figure 7−4.Programming Tool Block Diagram (Standby Mode 1 − Receive)

7-8

TRF6901 Programming Tool

7.4.2.3 ACTIVE Mode 0 Transmit

Figure 7−5.Programming Tool Block DIagram (Active Mode Transmit)

TRF6901 Serial Port Tools Software

7-9

TRF6901 Programming Tool

7.4.2.4 ACTIVE Mode 1 Receive

Figure 7−6.Programming Tool Block DIagram (Active Mode Receive)

7.4.2.5 Control Signals in 3-State

When the programming tool configures any of the control signals as a high-impedance input, the visual input window indicates that a possible state change may arise from an external hardware stimulus to interface J12.

When the ACTIVE/STDBY control signal is Z, the modules that are active when this signal is high appear as green. When this signal is low, these modules appear as light blue.

When the MODE control signal is Z, the modules that reflect the mode 1 state appear green when this signal is high. When this signal is low , the modules that reflect the mode 0 state appear green.

When the LEARN/HOLD control signal is Z, the data slicer mode status indicates 3-state.

7-10

When the TXDATA control signal is Z, the TXDATA indicator in the Visual window toggles between TXDA TA high and TXDA TA low. However, this does not cause the control signal line to the TRF6901 to toggle. It is only to indicate that the port controlling the TXDATA signal is now configured as a high-impedance input.

When any of these indicators appear, the state of the control lines is not controlled by the MSP430. The MSP430 ports applying these control signals are configured as high-impedance inputs.

7.4.2.6 Scroll Box Item Selection

When making changes to the PA attenuation, modulation, charge pump current, SVS voltage, demodulator time constant, or XTAL trimming capacitance in each corresponding scroll box, it is important to click on the selected item to update the data.

Upon selection, a green display panel appears in the center of the visual input form. In addition, the Program button changes to red, indicating the device is not programmed with the current settings. After pressing the Program button, the current settings are programmed to the TRF6901. At this point, the

Program button changes back to grey.

TRF6901 System Mode Tool

7.4.2.7 TRF6901 TX/RX Path and Functional Block Activation

When making changes to the visual mode environment, the user may select to activate the transmit or receive path as well as activate an independent block such as the dc/dc converter , buf fered clock input, and brownout detector.

Clicking a button within either the transmit or receive path results in the entire path being enabled or disabled. For example, when the LNA button is clicked with the receive path disabled, the receive path becomes enabled and the P A (transmit path) becomes disabled. When the LNA button is clicked with the receive path enabled, the receive path becomes disabled and the PA (transmit path) becomes enabled.

It is important to remember that when selecting the TX/RX path, the state applies only to the currently selected mode. The other mode settings are retained.

7.5 TRF6901 System Mode Tool

7.5.1 System Mode Software Overview

The user accesses the system mode software when attempting to observe a basic RF link. After configuring two setups (each with one TRF6901 RF EVM and one serial port module), the user may establish the RF link controlled through the MSP430F149 firmware implemented on the serial port module. Communication to/from the system mode tool on the user’s PC is implemented via the serial port connector located on the serial port module.

After the user verifies that the two tool kits are configured with the proper jumpers setting and cable connections (see section 6.2.2 for proper configuration), upon supplying power to the tool kits, the setups are ready for the RF link. Simple text messages can then be entered into the system mode tool send buffer text box.

TRF6901 Serial Port Tools Software

7-11

TRF6901 System Mode Tool

7.5.2 System Mode Form

Figure 7−7.System Mode Tool—Version 2.01

7.5.2.1 Tool Bar Options

File

Exit: Closes all TRF6901 serial port tools windows and exits

COM Port

Select COM 1: Selects PC COM port 1 if available and attempts to

Select COM 2: Selects PC COM port 2 if available and attempts to

Help Currently no features present.

7.5.3 System Mode Configuration

Configuring the TRF6901 RF Tool Kit in System Mode

Configure the TRF6901 RF EVM.

7-12

the software

communicate with the TRF6901 serial port tool module.

TRF6901 System Mode Tool

Apply supply jumpers JP2 and JP6. Remove jumpers JP4 and JP5. Disconnect the parallel port cable if applied to the EVM.

Connect P1 interface on the RF EVM to the to SV1 interface on the TRF6901 serial port tool module.

Supply power to the TRF6901 RF EVM.

LEDs, VCC1 and ENABLE on the RF EVM becomes active. In addition, the LEDs MODE, ACTIVE, TXDATA, and LEARN on the

TRF6901 serial port module becomes active.

Connect the RS232 port of the EVM to a PC, using the included RS232 cable.

Press the Reset button on TRF6901 serial port tool module to ensure a proper start up. Again all LEDs should turn on.

Start the TRF6901 baseband tool software and select the system mode tool.

Select the COM port that the TRF6901 serial port module is connected. Now the program is ready to transmit data to the EVM. For this purpose

data can be typed into the Send Buffer window, maximum of 32 ASCII characters.

Connecting the Two TRF6901 Units for System Mode

The two TRF6901 units can be connected by RF cables or four antennas. If the user is using RF cables, it is recommended that on each of the two

connections, i.e., from J2 TX_OUT of TRF6901 Unit1 to J1 RX_IN+ of TRF6901 Unit2 and J2 TX_OUT of TRF6901 Unit2 to J1 RX_IN+ of TRF6901 Unit1, a 20-dB attenuator should be implemented for proper transmission and reception if the cables are not too long.

Antennas are also applicable for the this setup. It allows the user to evaluate the performance of the TRF6901 units at various distances. If the user is using an antenna, then 868-MHz quarter-wave antennas having an output impedance of 50 Ω is recommended. Each unit requires two of these antennas for proper RF link.

Establishing an R F link without the use of any of these devices would result in minimal performance. Even placing the TRF6901 within a few inches of each other does not assure a successful link, since the MSP430 firmware has a checksum scheme. The probability of missing a single bit out of 32 bytes is high and hence if a single bit is missed, the whole data packet is discarded and does not show on the system mode software.

7.5.4 System Mode Operation

In the Figure 7−8 the text TRF6901 System Mode Transmit was typed into the window. This data can be sent either by pressing Enter on the keyboard, or by clicking on the Send button.

TRF6901 Serial Port Tools Software

7-13

TRF6901 System Mode Tool

Figure 7−8.System Mode Tool—Example Operation

There are two history windows, one for transmitted data, and one for received data. All sent data and received data packages are stored in these windows. As the implemented RF link supports acknowledge of the transmitted data packages, information regarding whether the transmitted data package has been received or not is visible. The acknowledged data packages are marked by an @ at the end of the data package in the Sent Data window. (see Figure 7−8) In this example the second data package was lost. No acknowledge has been received.

In the Statistics frame additional information about the numbers of transmitted, acknowledged, and lost and received packages is displayed. The DPER (data package error rate) is displayed as a numeric value in % as well as a bar graph. The number of received packages stands for the number of received packages, data that has been transmitted from the counterpart. This has nothing to do with the received acknowledgements.

7-14

TRF6901 European Frequency Plan Tool

7.6 TRF6901 European Frequency Plan Tool

The TRF6901 European frequency plan tool is provided as an additional option for customers wanting to perform development within the European ISM band.

To gain access to this tool, within the programming tool binary input form, type EU into the reference frequency text edit box. After pressing Enter, the Options drop down menu has the frequency plan added.

Selecting the Options−>Frequency Plan activates the European ISM band frequency error calculation form.

7.6.1 European ISM Band Frequency Error Calculations Form

Figure 7−9.European ISM Band Frequency Error Calculations Form

TRF6901 Serial Port Tools Software

7-15

TRF6901 European Frequency Plan Tool

7.6.1.1 Tool Bar Options

File

Exit: Closes all TRF6901 serial frequency tools windows and exits the

software.

Options

Frequency Error Calculation:

Selection of this option starts the frequency error calculation based on data entered into the form.

Export Settings to PRG Tool:

Selection of this option takes the register data from the frequency plan tool and exports the data to the programming tool.

Import Settinhgs from PRG Tool:

Selection of this option takes the register data from the programming tool and imports the data into the frequency plan tool.

7.6.2 European ISM Band Frequency Calculations Form Overview

The European ISM band frequency calculation form is divided into four sections.

1) Reference frequency, Mode 0 TX, and Mode 1 RX information

2) European ISM band frequency map

3) Desired frequency values

4) Frequency error table The reference frequency , Mode 0 TX, and Mode 1 RX information edit boxes

at the top of the window are used to specify transmit and receive modes of operation as well as to enter reference divider selected values. Relevant register setting information is maintained in these edit boxes.

The European ISM band frequency map in the center of the window displays the European ISM band allocations. As the user updates information in this screen, frequency information is displayed on this frequency map.

In the desired frequency values edit boxes, the user can enter information related to system requirements.

The frequency error table displays the Mode 0 TX and Mode 1 RX register settings and resulting errors for given reference frequency values. Results are sorted by lowest TX error.

7.6.3 Frequency Error Calculation Operation

Upon entering the reference divider, desired TX frequency, and frequency deviation, the error calculation routine may be executed. During the error calculation, the routine sweeps the reference divider value by reference value ±10 steps. Therefore, for accurate analysis, various reference divider options may be required to achieve the best resulting frequency error.

7-16

Upon completion of the error calculation, the frequency error table is updated. Data is sorted by the lowest TX frequency error.

To the right of each data row in the frequency error table the user can select the setting displayed. Upon selection, the settings are displayed within the frequency map as well as updating the Reference Divider, Mode 0 Transmit, and Mode 1 Receive register settings.

The user may export these settings back to the programming tool form by selecting Options−>Export Setting to PRG Tool. Once the data is updated in the programming tool, the settings may be applied to the TRF6901 hardware for verification.

7.7 Reprogramming of the MSP430F149

There are various options to reprogram the MSP430F149, populated on the baseband board. The JTAG interface connector J13 is ready for reprogramming the FLASH device with the MSP−FET430x140 FLASH emulation tool. For further information see the MSP430 web page.

TRF6901 European Frequency Plan Tool

http:/www.ti.com/sc/docs/products/micro/msp430/msp430.htm On this page the user finds links to application reports that describe the

capabilities of the MSP430 microcontroller family and the various reprogramming techniques.

TRF6901 Serial Port Tools Software

7-17

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