Protocol Examples for ISM Band Applications

Transcription

1 November 2008 Protocol Examples for ISM Band Applications Standard Configuration Set for the SmartLEWIS Receiver TDA5230 Preliminary Application Note V1.0 Wireless Control

2 Edition Published by Infineon Technologies AG Munich, Germany 2008 Infineon Technologies AG All Rights Reserved. Legal Disclaimer The information given in this document shall in no event be regarded as a guarantee of conditions or characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights of any third party. Information For further information on technology, delivery terms and conditions and prices, please contact the nearest Infineon Technologies Office ( Warnings Due to technical requirements, components may contain dangerous substances. For information on the types in question, please contact the nearest Infineon Technologies Office. Infineon Technologies components may be used in life-support devices or systems only with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered.

3 TDA523x Protocol Examples Protocol Examples for ISM Band Applications Revision History: , V1.0 Previous Version: none Page Subjects (major changes since last revision) Trademarks of Infineon Technologies AG SmartLEWIS, A-GOLD, AOP, BlueMoon, ConverGate, Converpath, COSIC, C166, DUALFALC, DuSLIC, E-GOLD, ELASTec, Epic, FALC, FlexiSLIC, GEMINAX, GIGAFLOW, GOLDMOS, INCA, IOM, IPVD, Isac, IWE, IWORX, LEDFET, M GOLD, MuSLIC, OCTALFALC, OCTAT, OmniTune, OmniVia, OPTIVERSE, PASi, PROSOC, QUADFALC, SCEPTRE, SCOUT, SEROCCO, S-GOLD, SICOFI, SIEGET, SLIC, SMARTI, SMARTiPM, SMARTiPM+, SMARTiUE, SMARTi3G, SMARTi3G+, SMINT, SOCRATES, TrueNTRY, VINAX, VINETIC, VIONTIC, VOIPRO, WDCT, WildPass, X-GOLD, XMM, X-PMU. Other Trademarks Microsoft, Visio, Windows of Microsoft Corporation. Linux of Linus Torvalds. FrameMaker of Adobe Systems Incorporated. APOXI, COMNEON of Comneon GmbH & Co. OHG. PrimeCell, RealView, ARM, ARM Developer Suite (ADS), Multi-ICE, ARM1176JZ-S, CoreSight, Embedded Trace Macrocell (ETM), Thumb, ETM9, AMBA, ARM7, ARM9, ARM7TDMI-S, ARM926EJ-S of ARM Limited. OakDSPCore, TeakLite DSP Core, OCEM of ParthusCeva Inc. IndoorGPS, GL-20000, GL-LN-22 of Global Locate. mipi of MIPI Alliance. CAT-iq of DECT Forum. MIPS, MIPS II, 24KEc of MIPS Technologies, Inc. Texas Instruments, PowerPAD, C62x, C55x, VLYNQ, Telogy Software, TMS320C62x, Code Composer Studio, SSI of Texas Instruments Incorporated. Luxworks of LSI Corporation. Bluetooth of Bluetooth SIG, Inc. IrDA of the Infrared Data Association. Java, SunOS, Solaris of Sun Microsystems, Inc. Philips, I2C-Bus of Koninklijke Philips Electronics N.V. Epson of Seiko Epson Corporation. Seiko of Kabushiki Kaisha Hattori Seiko Corporation. Panasonic of Matsushita Electric Industrial Co., Ltd. Murata of Murata Manufacturing Company. Taiyo Yuden of Taiyo Yuden Co., Ltd. TDK of TDK Electronics Company, Ltd. Motorola of Motorola, Inc. National Semiconductor, MICROWIRE of National Semiconductor Corporation. IEEE of The Institute of Electrical and Electronics Engineers, Inc. Samsung, OneNAND, UtRAM of Samsung Corporation. Toshiba of Toshiba Corporation. Dallas Semiconductor, 1-Wire of Dallas Semiconductor Corp. NOVeA of Virage Logic Corp. ISO of the International Organization for Standardization. IEC of the International Engineering Consortium. EMV of EMVCo, LLC. Zetex of Zetex Semiconductors. Rohm of Rohm Co., Ltd. Microtec of Microtec Research, Inc. Verilog of Cadence Design Systems, Inc. ANSI of the American National Standards Institute, Inc. WindRiver and VxWorks of Wind River Systems, Inc. Nucleus of Mentor Graphics Corporation The information in this document is subject to change without notice. Last Trademarks Update We Listen to Your Comments Any information within this document that you feel is wrong, unclear or missing at all? Your feedback will help us to continuously improve the quality of this document. Please send your proposal (including a reference to this document) to: wirelesscontrol@infineon.com

4 TDA523x Protocol Examples Protocol Examples for the ISM Frequency Bands Table of Contents 1 Protocol Examples for the ISM Frequency Bands Legislative Restriction Jammer Immunity Current Consumption Tools IAF Tool and Protocol Examples Polling Strategy Excel Sheet TDA523x Explorer Software Download Information Steps to get it running Detailed Description of Protocol Examples kBit ASK USA Pattern kBit FSK EU Pattern kBit FSK USA Pattern kBit FSK EU Pattern kBit FSK Multi-Channel Pattern...10 Preliminary Application Note 4 V1.0,

5 Protocol Examples for the ISM Frequency Bands 1 Protocol Examples for the ISM Frequency Bands In general the RF protocol is always a compromise in terms of sensitivity, current consumption, data throughput, jammer immunity and regional legislative restrictions. The given protocol examples are typical compromises of the above mentioned parameters but of course can always be optimized towards a certain parameter. 1.1 Legislative Restriction The USA patterns are defined to fulfill the FCC Part 15 requirements and take advantage out of the Duty Cycle Correction Factor. The Duty Cycle (FCC15.35) which is mentioned is related to Carrier ON time within a 100ms time slot. For more details refer to the Application Note on our Web side: (Download App Note) This Duty Cycle Correction Factor allows the transmitter counterpart of the TDA523x receiver to send with higher output power then initially defined. In the equation below the calculation of the correction factor is depicted. K E TX time on in a 100ms window = 20log ( db) 100ms The European equivalent to the FCC is called ETSI. This regulation framework allows in the 434MHz band (433,05-434,79MHz) an output power of 10mW if the transmitter has an ON/OFF Duty Cycle below 10% otherwise the output power is limited to 1mW. 1.2 Jammer Immunity The immunity against jammers can be improved by several methods. The best method to achieve excellent immunity performance is the multi-channel concept. The TDA523x receiver is able to handle this challenge in a very elegant way. The receiver scans several Radio Frequency (RF) channels and processes the data without the need of a microcontroller. If a jammer appears on one of the channels the communication is possible on the other remaining channels. In principle can be stated that the modulation technique has also a contribution to the receiver immunity performance. It can be stated that for limiter based receiver systems, Frequency Shift Keying (FSK) has a higher interferer immunity compared to OOK (On/Off Keying == ASK with 100% modulation index). During the OFF period of the signal the interferer can be directly seen on the Receive Signal Strength Indicator (RSSI) voltage. In FSK the signal is always present and the Interferer will be suppressed to a certain extend by the limiter effect. 1.3 Current Consumption All protocols are designed with a Wake up Pattern (WUP), SYNC Pattern, Telegram Start Identifier (TSI) and Payload Data. The most important part to reduce the average current consumption on the receiver side is the WUP frame, which allows the receiver to perform a polling strategy. Polling means that the TDA523x receiver changing from active mode (RXRUN Mode) to sleep mode within a specified time period. This polling strategy allows the receiver to reduce the active time significantly and of course the average current consumption. The TDA523x receiver is able to handle this polling method by itself (autonomous receiver) and just alerts the microcontroller by an Interrupt if the appropriate WUP and TSI Pattern were found. This very important feature of the TDA523x receiver family reduces the overall system current consumption because the microcontroller will sleep most of the time and is just interrupted if a valid packed was received. Preliminary Application Note 5 V1.0,

6 Tools 2 Tools To get the defined protocols properly running, Infineon provides a toolset which helps the developer to verify his work and that the receiver is correctly configured. The provided Quick Start guide will give more details and also the steps to get the below just mentioned tools running. (Download Quick start guide) 2.1 IAF Tool and Protocol Examples The pre-defined pattern of the protocol examples are all implemented in the so called IAF-Tool (Integrated Application Framework) which is a GUI describing all registers of the TDA523x receiver in a way that is easy to understand (Download IAF tool). For all of the protocol examples described below a workspace and project within the IAF tool is available for download. (Download Protocol Example Zip File) The given protocol examples can be used as they are or to ease up your development as starting point for your customizations. 2.2 Polling Strategy Excel Sheet The above mentioned polling strategy is also described in an Excel sheet which automatically calculates the required ON and OFF timings for the given protocol. Infineon also provides this Excel sheet, worked out for all ISM pattern on our web side. (Download Protocol Example Zip File) 2.3 TDA523x Explorer Software For working with our evaluation boards, the configurations that are built within the IAF tool can be downloaded to the receiver by the TDA523x explorer software. (Download TDA523x Explorer Software) This tool provides also some basic functionality to read out the FIFO or react on the occurrence of an interrupt. (read out FIFO automatically or read interrupt status register.) 2.4 Download Information If there should be any problem by using the download links in this document, please go to and download the latest documentation and tools by clicking on the TDA5230 or TDA5231 download section respectively Steps to get it running 1. Download and Install all above mentioned Software Tools ( IAF-Tool and Explorer Tool ) 2. Download and Unzip the Protocol_Example_vx.x.zip to your preferred location on your hard or network drive. 3. Connect the TDA523x Eval Board via USB to the PC or Notebook. 4. Within the specified Protocol folders the following files are of importance: a. Protocol_name.davws IAF Workspace file b. Protocol_name.xls Polling Strategy Excel Sheet c. Protocol_name.txt Configuration File (output of IAF Tool) Preliminary Application Note 6 V1.0,

7 10 Steps to get it running Figure 1 Folder content of 10k EU Pattern 5. Open the TDA523x Explorer Software and download the Configuration File to the Eval Board via the File and Configure Buttons. Figure 2 Explorer Tool: Configuration Window 6. Connect the 50 Ohm Antenna to the Eval Board 7. Implement the described Protocol Example into a RF transmitter. 8. Switch to the Run Tab within the Explorer tool. Preliminary Application Note 7 V1.0,

8 Detailed Description of Protocol Examples Figure 3 Explorer Tool: Run Window 9. Trigger the RF transmitter to send out the protocol. 10. The payload of the transmitted data will be depicted in the SPI Log window of the Explorer Tool. 4 Detailed Description of Protocol Examples 4.1 5kBit ASK USA Pattern Figure 4 5k Bit ASK USA Pattern Modulation: ASK Data Rate: 5kBit Coding: Manchester WUP Data: 100Bit all 0 SYNC Data: 6 Bit all 0 TSI Data: 14 Bit Payload: 10 Byte data (could be modified for different applications) Main target: RX sensitivity: Average RX current of TDA523x: FCC Duty Cycle factor for TX: fast data transfer dbm 1.17 ma 20 db Preliminary Application Note 8 V1.0,

9 Detailed Description of Protocol Examples 4.2 5kBit FSK EU Pattern 5kBit FSK EU 100 Bit WUP TSI 80 Bit Data 20 ms 20 ms Figure 5 5kBit FSK EU Patter Modulation: FSK Data Rate: 5kBit FSK Deviation: 35kHz Coding: Manchester WUP Data: 100Bit all 0 SYNC Data: 6 Bit all 0 TSI Data: 14 Bit Payload: 10 Byte data (could be modified for different applications) Main target: RX sensitivity: Average RX current of TDA523x: If used in US FCC DC factor: fast data transfer, higher immunity against jammer dbm 1.22 ma 7.9 db kBit FSK USA Pattern 10kBit FSK USA 144 Bit WUP TSI 128 Bit Data 14.4 ms 85.6 ms 14.4 ms Figure 6 10kBit FSK USA Pattern Modulation: FSK Data Rate: 10kBit FSK Deviation: 50kHz Coding: Manchester WUP Data: 144Bit all 0 SYNC Data: 6 Bit all 0 TSI Data: 10 Bit Payload: 16 Byte data (could be modified for different applications) Main target: RX sensitivity: Average RX current of TDA523x: FCC Duty Cycle factor for TX: fast data transfer, higher immunity against jammer dbm 1.02 ma 16.8 db Preliminary Application Note 9 V1.0,

10 Detailed Description of Protocol Examples kBit FSK EU Pattern Figure 7 10kBit FSK EU Pattern Modulation: FSK Data Rate: 10kBit FSK Deviation: 50kHz Coding: Manchester WUP Data: 200Bit all 0 SYNC Data: 6 Bit all 0 TSI Data: 10 Bit Payload: 16 Byte data (could be modified for different applications) Main target: RX sensitivity: Average RX current of TDA523x: FCC Duty Cycle factor for TX: fast data transfer, higher immunity against Jammer dbm 0.71 ma 9.2 db kBit FSK Multi-Channel Pattern Figure 8 10kBit FSK Multi-Channel Protocoll Modulation: FSK Data Rate: 10kBit Channel frequency Ch1: MHz Ch2: MHz FSK Deviation: 50kHz Coding: Manchester WUP Data: 104Bit all 0 SYNC Data: 6 Bit all 0 TSI Data: 10 Bit Payload: 10 Byte data (could be modified for different applications) Main target: RX sensitivity: Average RX current of TDA523x: FCC Duty Cycle factor for TX: fast data transfer, Jammer immunity dbm 1.93 ma 13.9 db Preliminary Application Note 10 V1.0,

11 Published by Infineon Technologies AG