Philips rm800 DATASHEETS
HT RM800 Family
TM
HITAG
Hardware
Revision 5.0
Long Range Reader Module
February 1997Product Specification
Long Range Reader Module HT RM800 Rev. 5.0 February 1997
Table of Contents
1 INTRODUCTION 5
2 SYSTEM OVERVIEW 6
2.1 Transponders 6
2.2 Host 6
2.3 I/O - Functions 6
2.4 Connecting the Antenna 7
2.5 Behaviour with Several Transponders 7
3 SPECIFICATIONS 8
3.1 Electrical Specifications 8
3.1.1 Power Supply 8
3.1.2 Modulation 9
3.1.3 Interface 9
3.1.4 Metallic Environment, Interferences and other Readers 9
3.1.5 Temperature Range 9
3.2 Mechanical Specifications 10
3.2.1 Mechanical Dimensions 10
3.2.2 Pin Assignment 11
4 DESCRIPTION OF THE READER MODULE FUNCTIONS 12
4.1 Block Diagram 12
4.1.1 Sine Generator, Amplifier and Voltage Limiter 12
4.1.2 Microcontroller 12
4.1.3 Interface: Microcontroller - HOST 13
4.1.4 Receiver 13
4.1.5 Digital Signal Processing Unit (DSP) 13
4.1.6 Voltage Regulator Unit 13
4.1.7 Antenna 13
4.2 Standby Mode 13
5 POSTAL APPROVAL AND DISTURBERS 14
5.1 Postal Approval 14
5.2 Periodic Disturbers 15
6 CONNECTION OF THE HITAG READER MODULE 16
6.1 Building HITAG Long Range Antennas 16
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December 1996 Rev. 5.0 Long Range Reader Module HT RM800
6.1.1 Basics 16
6.1.2 Specifications 16
6.1.3 Recommended Antenna Cable and Length 16
6.1.4 Tuning of the Antenna Current 17
6.1.5 Tuning of the Antenna Phase 17
6.1.6 Antenna Malfunction Indication 17
6.1.7 Additional Notes 18
6.2 Possible Sources of Errors by Connecting the HITAG Long Range Reader Module 19
7 SECURITY CONSIDERATIONS 20
7.1 Operating Security 20
7.1.1 Anticollision Mode 20
7.1.2 Monitoring the Supply Voltage of the HITAG Long Range Reader Module 20
7.1.3 Antenna Rupture, Antenna Short Circuit 20
7.2 Data Privacy 21
8 ORDERING INFORMATION 22
Author: Anton Prantl
Htrm800.doc/HS Page 3 of 23
Long Range Reader Module HT RM800 Rev. 5.0 February 1997
Definitions
Data sheet status
Objective specificationThis data sheet contains target or goal specifications for product development.
Preliminary specificationThis data sheet contains preliminary data; s upplementary data may be
published later.
Product specification This data sheet c ontains final produc t spec ifications .
Limiting values
Limiting values given are in accordance with the Absolute Max imum Rating Syst em (IEC 134).
Stress above one or more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at thes e or at any other c onditions
above those given in the Characteristics s ection of the specific ation is not implied. Ex posure to
limiting values for extended periods may affect devic e reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
Life support applications
These products are not designed for use in life support appliances, devices, or systems where
malfunction of these products can reasonably be expected to result in personal injury. Philips
Semiconductors´ customers using or selling these products for use in such applications do so on
their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from
such improper use or sale.
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December 1996 Rev. 5.0 Long Range Reader Module HT RM800
1 Introduction
- is the name of one of the universal and powerful product lines of our 125 kHz family.
The contactless read/write system that works with passive transponders is suitable for various
applications. Inductive coupling helps you to achieve operating ranges up to 1000 mm and the use
of cryptography guarantees highest data security.
Anticollision Mode, which is used only in long range operation, allows you to handle several
transponders that are within the communication field of the antenna at the same time, thus
achieving highest operating security and permitting to handle several data transfers quickly and
simu lta neo us ly. In this con te xt ant ico llisio n beco mes an e sse nt ial ele ment o f ap plica tio ns suc h as
ski-ticketing and long range access control. With applications of that type it will alwa ys hap pen
that several transponders arrive in the communication field of the antenna at the same time.
Nevertheless, the proximity application also prevents any type of malfunction even if several
transponders arrive in the communication field of the antenna at the same time.
The HITAG product family is used both in the proximity area (operating range up to about
200 mm) and in the long range area (operating range up to about 1000 mm). In both cases the
HITAG Core Module forms the central part.
The most outstanding features of the HITAG Long Range Reader Module are:
• easy integration
• high noise immunity
• small size
• uncomplicated interfaces
• very powerful RF-part
The following paper describes the reader hardware, interfaces and connection of the antenna.
.
Htrm800.doc/HS Page 5 of 23
Long Range Reader Module HT RM800 Rev. 5.0 February 1997
2 System Overview
The following drawing shows the HITAG Long Range Reader Module as part of a complete
Radio Frequency Identification (RFID) system.
2.1 Transponders
The HITAG Reader Module can communicate with Philips Semiconductors’ HITAG 1 and
HITAG 2 transponders as well as with further 125kHz transponders as for example the
µ E M(H400x) transponders. You use software co mmands to switch the device from being used as
read/write device for HITAG transponders to a read device for e.g. the µEM(H400x)
transponders and the other way round.
2.2 Host
The connection to the host (e.g.: µC or PC) is a serial interface on RS232 level (version
HT RM800/AED) for data transmission. Optionally wired interface drivers for CMOS (version
HT RM800/EED) and RS485 (version HT RM800/CED) are integrated on the Reader Module.
2.3 I/O - Functions
One line of the HITAG Reader Module is wired as input from e.g. switches, one as output to
drive a LED.
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December 1996 Rev. 5.0 Long Range Reader Module HT RM800
2.4 Connecting the Antenna
The antenna has to be mounted in the following way:
C is used for tuning the antenna. For more detailed information please see Chapter 6.1 ( Building
HITAG Long Range Antennas).
2.5 Behaviour with Several Transponders
If several HITAG 1 transponders arrive simultaneously within the communication field of the
antenna of a HITAG Long Range Reader Module, all the HITAG transponders (theoret ically up
to 2³²) within the communication field of the antenna can be read and written simultaneously.
Because of the mutual influence of the transpo nder coils - they detune each ot her if there are to o
many too close to each other - the number of the transponders that can be operated
simultaneously is limited.
If several HITAG 2 transponders arrive simultaneously within the communication field of the
antenna of a HITAG Long Range Reader Module, the „stronger“ transponder (the nearer one)
takes over or - under special circumstances - no communication takes place. If the transponders
arrive in the field one after the ot her, communication is established with the first one, all the other
t ra nsp o nd er s a re igno r ed . Th is e nsu re s t ha t no t wo ( or s eve ra l) HI T AG 2 t r an sp on de rs w ill ev er
be processed (above all writt en to !) accidentally at the same time. By muting a selected HITAG 2
transponder (HALT Mode) another HITAG 2 transponder that is to be found in the
communication field of the antenna can be recognized.
Htrm800.doc/HS Page 7 of 23
Long Range Reader Module HT RM800 Rev. 5.0 February 1997
3 Specifications
3.1 Electrical Specifications
3.1.1 Power Supply
The Reader Module contains some filtering circuits for the power supply. Nevertheless some
requirements are to be fu lfilled by the pow er supply. This means the maximum ripple of the supply
voltages (± 15V) must not exceed the values listed in the following table.
frequency of
the ripple f [kHz]
maximum amplitude
of the ripple u [mV
0 ≤ f < 0.5
0.5 ≤ f < 20
20 ≤ f < 120
120 ≤ f < 130
130 ≤ f
3.1.1.1 Current Specification
I
typ
+ 15V 400 mA 550 mA 200 mA
- 15V - 300 mA - 400 mA - 100 mA
I
I
I
typ
max
stby
... typical current
... maximum current
... typical standby current
F1F1
I
max
48
7
36
12
48
I
F1F2
stby
RMS
]
F1F2
Instead of a transformer type supply unit (see above), a switching frequency power supply unit
can be used alternatively. The switching frequency must be in the range of:
165 kHz < f
< 210 kHz (over temperature, load and production)
switch
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