红外物理层协议

telepower888

【文件名】:07930@52RD_红外物理层协议.pdf
【格　式】:pdf
【大　小】:1603K
【简　介】:
【目　录】:Table of Contents
AUTHORS................................................................................................................................................................................ II
DOCUMENT STATUS............................................................................................................................................................... II
CURRENT CHANGES ................................................................................................................................................................ II
PRIOR CHANGES ..................................................................................................................................................................... II
INFRARED DATA ASSOCIATION (IRDA) - NOTICE TO THE TRADE -.................................................................... III
TABLE OF CONTENTS ..............................................................................................................................................................V
FIGURES ................................................................................................................................................................................. VI
TABLES ................................................................................................................................................................................ VIII
1. INTRODUCTION..........................................................................................................................................................1
1.1. SCOPE.............................................................................................................................................................................1
1.2. REFERENCES ...................................................................................................................................................................1
1.3. ABBREVIATIONS & ACRONYMS......................................................................................................................................2
1.4. DEFINITIONS...................................................................................................................................................................3
1.4.1. Link Definitions .................................................................................................................................................3
1.4.2. Active Output Interface Definitions ...............................................................................................................3
1.4.3. Active Input Interface Definitions ..................................................................................................................4
2. GENERAL DESCRIPTION........................................................................................................................................5
2.1. POINT-TO-POINT LINK OVERVIEW .................................................................................................................................5
2.2. ENVIRONMENT................................................................................................................................................................5
2.3. MODULATION SCHEMES.................................................................................................................................................5
2.4. EYE SAFETY STANDARDS...............................................................................................................................................5
3. MEDIA INTERFACE DESCRIPTION.......................................................................................................................6
3.1. PHYSICAL REPRESENTATION ..........................................................................................................................................6
3.2. OPTICAL ANGLE DEFINITIONS.........................................................................................................................................6
4. MEDIA INTERFACE SPECIFICATIONS.................................................................................................................7
4.1. OVERALL LINKS .............................................................................................................................................................7
4.2. ACTIVE OUTPUT INTERFACE...........................................................................................................................................8
4.3. ACTIVE INPUT INTERFACE...............................................................................................................................................9
5. 0.576, 1.152, 4.0 AND 16.0 Mbit/s MODULATION AND DEMODULATION...............................................10
5.1. SCOPE...........................................................................................................................................................................10
5.2. SERIAL INFRARED INTERACTION PULSES .......................................................................................................................10
5.3. 0.576 AND 1.152 Mbit/s RATES................................................................................................................................10
5.3.1. Encoding...........................................................................................................................................................10
5.3.2. Frame Format .................................................................................................................................................11
5.4. 4 Mbit/s RATE............................................................................................................................................................13
5.4.1. 4PPM Data Encoding Definition...................................................................................................................13
5.4.2. PPM Packet Format ......................................................................................................................................15
5.4.3. Aborted Packets.............................................................................................................................................19
5.4.4. Back to Back Packet Transmission ...........................................................................................................19
5.5 16.0 Mbit/s RATE.........................................................................................................................................................19
5.5.1 HHH (1,13) Modulation Code..........................................................................................................................20
5.5.2 Data Encoding Definition.................................................................................................................................20
5.5.3 HHH (1,13) Packet Format .............................................................................................................................22
5.5.4 Scrambling and Descrambling Functions ....................................................................................................24
5.5.5 – State Table of Scrambler/Descrambler Reference Hardware............................................................25
5.5.5 Aborted Packets ...............................................................................................................................................27
5.5.6 Back to Back Packet Transmission..............................................................................................................27
IrDA Serial Infrared Physical Layer Specification, Version 1.4, February 6, 2001
vi
APPENDIX A. TEST METHODS ................................................................................................................................28
A.1. BACKGROUND LIGHT AND ELECTROMAGNETIC FIELD ...................................................................................................28
A.2. ACTIVE OUTPUT SPECIFICATIONS.................................................................................................................................28
A.2.1. Peak Wavelength...........................................................................................................................................28
A.2.2. Intensity and Angle........................................................................................................................................28
A.2.3. Pulse Parameters and Signaling Rate.......................................................................................................30
A.2.4. Eye Safety Standard.....................................................................................................................................33
A.3. ACTIVE INPUT SPECIFICATIONS ....................................................................................................................................35
APPENDIX B. AN EXAMPLE OF ONE END OF A LINK IMPLEMENTATION ................................................37
B.1. DEFINITIONS................................................................................................................................................................37
B.2. PHYSICAL REPRESENTATIONS......................................................................................................................................37
B.3. FUNCTIONALITY & ELECTRICAL WAVEFORMS - DATA RATES UP TO & INCLUDING 115.2 Kbit/s.....38
B.4. RECEIVER DATA AND CALCULATED PERFORMANCE.....................................................................................................38
B.4.1. 115.2 kbit/s Standard Implementation Example.....................................................................................41
B.4.2. 115.2 kbit/s Low Power Option Implementation Example....................................................................42
B.4.3. 115.2 kbit/s Low Power Option/Standard Implementation Example..................................................43
B.4.4. 1.152 Mbit/s Standard Implementation Example....................................................................................44
B.4.5. 1.152 Mbit/s Low Power Option Implementation Example...................................................................45
B.4.6. 1.152 Mbit/s Lower Power/Standard Implementation Example...........................................................46
B.4.7. 4.0 Mbit/s Standard Implementation Example.........................................................................................47
B.4.8. 4.0 Mbit/s Low Power Option Implementation Example.......................................................................48
B.4.9. 4.0 Mbit/s Low Power/Standard Implementation Example...................................................................49
B.4.10. 16.0 Mbit/s Standard Implementation Example....................................................................................49
B.4.11. 16.0 Mbit/s Low Power Option Implementation Example...................................................................51
B.4.12. 16.0 Mbit/s Low Power/Standard Implementation Example..............................................................52
B.5. VFIR DECODER/ENCODER IMPLEMENTATION EXAMPLE...........................................................................................52
B.5.1. Reference Implementation of the HHH(1,13) Encoder ............................................................................52
B.5.2. Gate-Level Implementation of the HHH(1,13) Encoder ..........................................................................55
B.5.3. HHH(1,13) Decoding Equations .................................................................................................................56
B.5.4. Reference Implementation of the HHH(1,13) Decoder ............................................................................57
B.5.5. Gate-Level Implementation of the HHH(1,13) Decoder ..........................................................................57
B.5.6. Encoding/Decoding Examples ....................................................................................................................58
Figures
Figure 1. Schematic View of the Optical Interface Port Geometry
Figure 2. IR Transducer Module
Figure 3. Optical Port Geometry
Figure 4. Optical Port Angle Measurement Geometry
Figure 5. Acceptable Optical Output Intensity Range
Figure 6. Pulse Parameter Definitions
Figure 7. Pulse Delay and Jitter Definitions
Figure 8. 4.0 Mbit/s Jitter Definitions
Figure 9. Apparent Source Size Measurement
Figure 10. IEC 60825-1 AEL Classification Power Measurement
Figure 11. Optical High State Acceptable Range
Figure 12a. Example of One End of Link For Signaling Rates Up to & Including 115.2 kbit/s
Figure 12b. Example of One End of Link For Signaling Rates Up to 4.0 Mbit/s
Figure 13a. UART Frame
Figure 13b. IR Frame
Figure 14. Reference Hardware to implement the scrambling/descrambling functions
Figure 15. The reference implementation of the HHH(1, 13) encoder
Figure 16. Basic recommended gate-level implementation of the HHH(1, 13) encoder
IrDA Serial Infrared Physical Layer Specification, Version 1.4, February 6, 2001
vii