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125kHz RFID系统设计指南英文-(Microchip).pdf
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125kHz RFID系统设计指南[英文]_(Microchip).pdf
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2004 Microchip Technology Inc. DS51115F
microID
®
125 kHz RFID
System Design Guide
DS51115F-page ii 2004 Microchip Technology Inc.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR WAR-
RANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION, INCLUDING BUT NOT
LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,
MERCHANTABILITY OR FITNESS FOR PURPOSE.
Microchip disclaims all liability arising from this information and
its use. Use of Microchip’s products as critical components in
life support systems is not authorized except with express
written approval by Microchip. No licenses are conveyed,
implicitly or otherwise, under any Microchip intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EELOQ, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC, and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
PICMASTER, SEEVAL, SmartSensor and The Embedded
Control Solutions Company are registered trademarks of
Microchip Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, MPASM, MPLIB, MPLINK,
MPSIM, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail,
PowerCal, PowerInfo, PowerMate, PowerTool, rfLAB,
rfPICDEM, Select Mode, Smart Serial, SmartTel and Total
Endurance are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2004, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro
®
8-bit MCUs, KEELOQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DATA SHEET MARKINGS
Microchip uses various data sheet markings to designate each document phase as it relates to the product develop-
ment stage. The markings appear at the bottom of the data sheet, between the copyright and document and page
numbers. The definitions for each marking are provided below for your use.
Marking
Description
Advance Information The information is on products in the design phase. Your designs should not be finalized
with this information as revised information will be published when the product becomes
available.
Preliminary This is preliminary information on new products in production but not yet fully characterized.
The specifications in these data sheets are subject to change without notice. Before you
finalize your design, please ensure that you have the most current revision of the data sheet
by contacting your Microchip sales office.
No Marking Information contained in the data sheet is on products in full production.
2004 Microchip Technology Inc. DS51115F-page iii
M
PAGE
AN680 PASSIVE RFID BASICS
Introduction........................................................................................................................................ 1
Definitions.......................................................................................................................................... 2
System Handshake ........................................................................................................................... 4
Backscatter Modulation..................................................................................................................... 4
Data Encoding................................................................................................................................... 4
Data Modulation for 125 kHz devices (MCRF2XX) ........................................................................... 6
Anti-Collision ..................................................................................................................................... 7
MCRF200 DATA SHEET
Features............................................................................................................................................. 9
Application.......................................................................................................................................... 9
1.0 Electrical Characteristics.......................................................................................................... 11
2.0 Function Description................................................................................................................. 12
2.1 RF Front-End..................................................................................................................... 12
2.2 Configuration Register and Control Logic ......................................................................... 13
2.3 Memory Section ................................................................................................................ 14
2.4 Examples of Configuration Settings.................................................................................. 14
3.0 Modes Of Operation................................................................................................................. 16
3.1 Native Mode ...................................................................................................................... 16
3.2 Read Mode........................................................................................................................ 16
4.0 Contactless Programming........................................................................................................ 17
5.0 Mechanical Specifications For Die And Wafer ......................................................................... 19
6.0 Failed Die Identification............................................................................................................ 21
7.0 Wafer Delivery Documentation................................................................................................. 21
8.0 Notice On Die And Wafer Handling.......................................................................................... 21
9.0 Packaging Information.............................................................................................................. 22
9.1 Package Marking Information............................................................................................ 22
MCRF250 DATA SHEET
1.0 Electrical Characteristics.......................................................................................................... 29
2.0 Functional Description.............................................................................................................. 30
2.1 RF Front-End..................................................................................................................... 30
2.2 Configuration Register and Control Logic ......................................................................... 31
2.3 Memory Section ................................................................................................................ 32
2.4 Examples of Configuration Settings.................................................................................. 32
3.0 Modes of Operation.................................................................................................................. 34
3.1 Native Mode ...................................................................................................................... 34
3.2 Read Mode........................................................................................................................ 34
4.0 Contactless Programming........................................................................................................ 35
5.0 Anti-Collision ............................................................................................................................ 37
6.0 Mechanical Specifications for Die and Wafer........................................................................... 38
7.0 Failed Die Identification............................................................................................................ 40
8.0 Wafer Delivery Documentation................................................................................................. 40
9.0 Notice on Die and Wafer Handling........................................................................................... 40
10.0 Packaging Information............................................................................................................ 41
10.1 Package Marking Information.......................................................................................... 41
Table of Contents
DS51115F-page iv 2004 Microchip Technology Inc.
M
PAGE
TB023 CONTACT PROGRAMMING SUPPORT
Introduction...................................................................................................................................... 47
Definitions......................................................................................................................................... 47
File Specifications ............................................................................................................................ 47
AN710 ANTENNA CIRCUIT DESIGN FOR RFID APPLICATION
Introduction....................................................................................................................................... 49
Review of a Basic Theory for RFID Antenna Design ....................................................................... 49
Induced Voltage in an Antenna Coil................................................................................................ 51
Wire Types and Ohmic Losses ....................................................................................................... 54
Inductance of Various Antenna Coils .............................................................................................. 57
Configuration of Antenna Circuits.................................................................................................... 67
Consideration on Quality Factor Q and Bandwidth of Tuning Circuit.............................................. 69
Resonant Circuits............................................................................................................................ 70
Tuning Method ................................................................................................................................ 73
Read Range of RFID Devices......................................................................................................... 74
References...................................................................................................................................... 95
FSK READER REFERENCE DESIGN
Introduction...................................................................................................................................... 97
Reader Circuits................................................................................................................................ 97
1.0 Transmitting Section................................................................................................................. 98
2.0 Receiving Section..................................................................................................................... 98
3.0 microID FSK Reader ................................................................................................................ 99
4.0 FSK Reader Schematic.......................................................................................................... 101
5.0 FSK Reader Bill of Materials .................................................................................................. 102
6.0 FSK Source Code for the PICmicro
®
MCU............................................................................ 104
PSK READER REFERENCE DESIGN
1.0 Introduction.............................................................................................................................. 113
2.0 Reader Circuits........................................................................................................................ 113
2.1 Transmitting Section........................................................................................................ 114
2.2 Receiving Section............................................................................................................ 114
3.0 microID PSK Reader............................................................................................................... 115
4.0 PSK Reader Schematic.......................................................................................................... 117
5.0 PSK Reader Bill of Materials.................................................................................................. 118
6.0 PSK Source Code for the PICmicro
®
MCU............................................................................ 121
ASK READER REFERENCE DESIGN
1.0 Introduction............................................................................................................................. 131
2.0 Reader Circuits....................................................................................................................... 131
2.1 Transmitting Section........................................................................................................ 132
2.2 Receiving Section............................................................................................................ 132
3.0 microID ASK Reader.............................................................................................................. 133
4.0 ASK Reader Schematic.......................................................................................................... 134
5.0 ASK Reader Bill of Materials.................................................................................................. 135
6.0 ASK Reader Source Code for the PICmicro
®
MCU............................................................... 137
Table of Contents (Continued)
2004 Microchip Technology Inc. DS51115F-page v
M
PAGE
FSK ANTI-COLLISION READER REFERENCE DESIGN
1.0 Introduction............................................................................................................................. 153
2.0 Reader Circuits....................................................................................................................... 154
3.0 Anti-Collision Reader Schematic............................................................................................ 156
4.0 Anti-collision Reader Bill of Materials..................................................................................... 157
5.0 FSK Anti-Collision Source Code for the PICmicro
®
MCU ....................................................... 159
USING THE microID
®
PROGRAMMER
1.0 Introduction.............................................................................................................................. 171
2.0 Programming Signal Waveform ............................................................................................. 172
2.1 Power-up, Gap and Verification Signals.......................................................................... 172
2.2 Programming Sequence.................................................................................................. 172
3.0 Calibration of Programming Voltage ...................................................................................... 174
4.0 Programming Procedure ........................................................................................................ 176
4.1 Error Conditions .............................................................................................................. 176
4.2 Programming Precautions............................................................................................... 176
5.0 Programming in a Standard Terminal Mode .......................................................................... 178
5.1 Programmer Wake-up..................................................................................................... 178
5.2 Blank Check .................................................................................................................... 178
5.3 Program and Verify the Device ....................................................................................... 178
5.4 Error Conditions .............................................................................................................. 178
6.0 microID
®
Programmer Schematic ......................................................................................... 181
7.0 microID
®
Programmer Bill of Materials .................................................................................. 182
8.0 Programmer Source Code for PIC16C73............................................................................... 184
WORLDWIDE SALES AND SERVICE
Table of Contents
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