RM440 RS232 RM440/AIE RS422 RM440/BIE RS485 RM440/CIE 16VDC DK-2300 FIN-02630 - Datasheet Archive

 

HITAGTM Proximity Reader Module Hardware Product Specification Revision 2.0 November 1996 Proximity Reader Module HT RM440 Rev.

 

HT RM440 RM440 Family HITAGTM Proximity Reader Module Hardware Product Specification Revision 2.0 November 1996 Proximity Reader Module HT RM440 RM440 Rev. 2.0 November 1996 Table of Contents 1. Introduction 5 2. System Overview 6 2.1. Transponders 2.2. Host 2.3. I/O - Functions 2.4. Connecting the Antenna 2.5. Behaviour with Several Transponders 3. Specifications 6 6 6 7 7 8 3.1. Electrical Specifications 3.1.1. Power Supply 3.1.2. Modulation 3.1.2.1. Read/Write Device Transponder 3.1.2.2. Transponder Read/Write Device 3.1.3. Interface 3.1.4. Metallic Environment, Interferences 3.1.5. Distance between Two Antennas 3.1.6. Temperature Range 3.2. Mechanical Specifications 3.2.1. Mechanical Dimensions 3.2.2. Pin Assignment 3.2.3. Pin Function Description 3.2.4. SubD Pin Description 3.2.5. Power supply connector 8 8 8 8 8 8 9 9 9 10 10 11 13 13 13 4. Description of the Reader Module Functions 14 4.1. Block Diagram 4.1.1. EEPROM 4.1.2. Micro Controller 4.1.3. Interface: Micro Controller - HOST 4.1.4. Line driver 4.1.5. Transmitter and Receiver 4.1.6. Antenna 4.1.7. Filtering of Power Supply 4.1.8. I/O Functions 14 14 14 14 14 15 15 15 15 5. Postal Approval 16 6. Connection of the Reader Module 17 Htrm440.doc/HS Page 2 of 27 November 1996 Rev. 2.0 Proximity Reader Module HT RM440 RM440 6.1. Building HITAG Proximity Antennas 6.1.1. Basics 6.1.2. Antenna Coil 6.1.3. Measuring the Inductance 6.1.4. Antenna Cable Length 6.1.5. Antenna Tuning 6.1.6. Determining the Serial Resistance of the Antenna 6.1.7. Checking the Antenna Voltage ÛL 6.1.8. Procedure for Practical Antenna Design 6.1.9. Reference Antennas 6.2. Possible Sources of Errors by Connecting the HITAG Proximity Reader Module 7. Security Considerations 17 17 18 19 19 19 20 20 21 23 24 25 7.1. Operating Security 7.1.1. Anticollision Mode 7.1.2. Monitoring the Supply Voltage 7.1.3. Antenna Rupture, Antenna Short Circuit 7.2. Data Privacy 8. Ordering Information 25 25 25 25 26 27 Author : Ulrich Brändle Page 3 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 Rev. 2.0 November 1996 Definitions Data sheet status Objective specification This data sheet contains target or goal specifications for product development. Preliminary specification This data sheet contains preliminary data; supplementary data may be published later. Product specification This data sheet contains final product specifications. Limiting values Limiting values given are in accordance with the Absolute Maximum Rating System (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 these or at any other conditions above those given in the Characteristics section of the specification is not implied. Exposure to limiting values for extended periods may affect device 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. Htrm440.doc/HS Page 4 of 27 November 1996 1. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Introduction - is the name of one of the universal and powerful product lines of our 125 kHz family. The contactless proximity read/write system that works with passive transponders is suitable for various applications. Inductive coupling helps you to achieve reading ranges up to 200 mm and the use of cryptography guarantees highest data security. The HITAG Proximity Reader Module provides you with a universal, cost-effective, small and complete reader unit. It enables communication with the transponders of the 125 kHz family, i.e. Mikron's HITAG 1, HITAG 2 and µEM(H400x) (Read Only) transponders in proximity applications, and the Philips PCF793x family which underlines the particular universality of the reader. Easy integration and application of the HITAG Proximity Reader Module is due to: · small size · uncomplicated interfaces Page 5 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 2. Rev. 2.0 November 1996 System Overview The following drawing shows the HITAG Proximity Reader Module as part of a complete Radio Frequency Identification (RFID) system. 2.1. Transponders The HITAG Proximity Reader Module can communicate with Mikron's HITAG 1 and HITAG 2 transponders as well as with further 125kHz transponders as e.g. the µEM(H400x) and the Philips PCF793x family. You use software commands to switch the device from being used as read/write device for HITAG transponders to a read device for µEM(H400x) transponders or a read/write device for the PCF793x and the other way round. 2.2. Host The connection to the host (e.g.: µC or PC) is a serial interface on RS232 RS232 level (version HT RM440/AIE RM440/AIE) for data transmission. Optionally wired interface drivers for RS422 RS422 (version HT RM440/BIE RM440/BIE) and RS485 RS485 (version HT RM440/CIE RM440/CIE) are integrated on the HITAG Proximity Reader Module. 2.3. I/O - Functions Two lines of the HITAG Proximity Reader Module are wired as inputs from e.g. switches, two as outputs to drive LEDs. On the read/write device space is reserved to connect three LEDs as well as to connect e.g. two switches. Htrm440.doc/HS Page 6 of 27 November 1996 2.4. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Connecting the Antenna There is space reserved on the HITAG Proximity Reader Module for tuning capacitors to tune the antenna in case there is no tuning capacity used on the antenna itself. The antenna has to be mounted in the following way: *) TX2 is used as GND C is used for tuning the antenna. For more detailed information please see Chapter 6.1 (Building HITAG Proximity Antennas). 2.5. Behaviour with Several Transponders If several HITAG transponders arrive simultaneously within the communication field of the antenna of a HITAG Proximity Reader Module, the "stronger" transponder (the nearer one) takes over or - under special circumstances - no communication takes place. If the transponders arrive into the field one after the other, communication is established with the first one, all the other transponders are ignored. Nevertheless it is possible to mute transponders, so that several HITAG transponders can be accessed sequentially. This ensures that no two (or several) HITAG transponders will ever be processed (above all written to!) accidentally at the same time. Page 7 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 3. Rev. 2.0 November 1996 Specifications 3.1. Electrical Specifications 3.1.1. Power Supply Power Supply Supply Current 9 - 16 VDC 150 mA max. 3.1.2. Modulation 3.1.2.1. Read/Write Device Transponder Type of Modulation Modulation Ratio amplitude shift keying (ASK) 100 % That means the carrier is periodically blanked completely, the information is located in the intervals between the pauses. 3.1.2.2. Transponder Read/Write Device Type of Modulation amplitude shift keying (ASK) 3.1.3. Modulation Ratio depending on the distance between transponder and read/write device Interface An interface driver for RS232 RS232 (version HT RM440/AIE RM440/AIE) is integrated on the HITAG Proximity Reader Module. Optionally drivers are RS422 RS422 (version HT RM440/BIE RM440/BIE) and RS485 RS485 (version HT RM440/CIE RM440/CIE) Htrm440.doc/HS Page 8 of 27 November 1996 3.1.4. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Metallic Environment, Interferences The communication range is impaired by metallic environment and electromagnetic interferences (e.g.: monitors, keyboards). Therefore, you should keep a distance of at least the antenna´s diameter to metallic surfaces or loops as well as to electromagnetic interferences. If this is not possible, you have to take preventive measures such as using ferrites or shielding for transponder and antenna. 3.1.5. Distance between Two Antennas In order to be able to operate two systems side by side without negative influence on communication ranges, you must place the antennas at a minimum distance of four times the antenna diameter. If you place them at a closer distance be sure to use suitable shielding or synchronisation. 3.1.6. Temperature Range -25° C to +85° C (operating) -40° C to +85° C (storage) Page 9 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 Rev. 2.0 3.2. Mechanical Specifications 3.2.1. November 1996 Mechanical Dimensions The following drawing (not to scale) shows the outer dimensions of the HITAG Proximity Reader Module with the six mounting holes, top view. Section A-A Htrm440.doc/HS Page 10 of 27 November 1996 3.2.2. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Pin Assignment The following drawing (not to scale) shows the pin assignment of the HITAG Proximity Reader Module (top view). The three spare places for antenna tuning are also shown in this drawing. Power supply 2 2 .8 m m Interface 3 places for tuning capacitors 2.54mm 1 2 3 4 5 6 7 8 9 10 11 12 13 8 .5 m m 2.54mm 2 .9 m m 2 .0 m m Page 11 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 Rev. 2.0 November 1996 The following table shows the pin assignment of the HITAG Proximity Reader Module, pin types and functions: Pin Number 1 2 3 4 5 6 Pin Name D1 Cathode D1 Anode D2 Cathode D2 Anode D3 Cathode D3 Anode PWR O PWR O PWR O Function Connection of Power LED Connection of LED Nr. 1 Connection of LED Nr. 2 7 8 9 10 SW1 SW1 SW2 SW2 I GND I GND Connection of Switch Nr. 1 Connection of Switch Nr. 2 11 12 13 RX TX1 TX2 I O GND Receiver Input Transmitter Antenna Ground I O PWR GND Htrm440.doc/HS a b a b input pin output pin power supply pin power supply pin Page 12 of 27 Type November 1996 3.2.3. Rev. 2.0 Pin Function Description Pin 1-2 Pin 3-6 These pins can be used to connect a power LED. These pins can be used to connect LEDs which are driven by the output pins of the Core Module. These pins can be used as inputs for switches and are internally connected to pins 17 and 18 (of the HITAG Core Module). This antenna signal input has to be connected to the input line of the antenna. (See also Chapter 2.3). This antenna signal output has to be connected to the output line of the antenna. (See also Chapter 2.3). This pin is used as GND - pin. The GND - line of the antenna has to be connected to this pin. (See also Chapter 2.3) P7 - P10: Pin 11: Pin 12: Pin 13: 3.2.4. Proximity Reader Module HT RM440 RM440 SubD Pin Description Connecting the serial interface use the following pin description: RS232 RS232 RS485 RS485 RS422 RS422 3.2.5. 1 NC NC NC 2 RxD AA- 3 TxD A+ A+ 4 NC NC NC 5 GND GND GND 6 NC NC NC 7 IC IC B+ 8 IC IC B- 9 NC NC NC Power supply connector The inner pin of the DC-connector has to be connected to positive voltage, the outer one has to be connected to ground. The connection is fail save. Page 13 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 Rev. 2.0 November 1996 4. Description of the Reader Module Functions 4.1. Block Diagram Note: R2 has only to be used for antenna cable lengths of more than 500 mm. 4.1.1. EEPROM The EEPROM is used to store non-volatile data such as personalization data, keys, passwords, configurations and status information. 4.1.2. Micro Controller The micro controller processes the protocol for the communication between the transponders and the read/write unit. The interface signals are converted so that a HITAG 1, HITAG 2, µEM(H400x) or Philips PCF793x transponder is able to process them and the outgoing signals from the transponder are converted into interface-compatible signals. The second essential micro controller function is its control function. The micro controller activates and deactivates the transmitter, switches the receiver between the modes for the different transponders reception and selects the EEPROM. 4.1.3. Interface: Micro Controller - HOST The device communicates with the host (processor, PC, .) via a serial interface using a baud rate of 9600 baud. Data transfer details are: 1 start bit, 8 data bits, 1 stop bit and no parity bit, the Least Significant Bit is sent first. 4.1.4. Line driver An RS232 RS232 interface driver is integrated on the HITAG Proximity Reader Module. Optionally an RS422 RS422 or an RS485 RS485 interface driver is possible. Htrm440.doc/HS Page 14 of 27 November 1996 4.1.5. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Transmitter and Receiver The transmitter receives data from the micro controller and modulates the carrier. The receiver demodulates the received data and passes them on to the micro controller for further processing. 4.1.6. Antenna To the design of HITAG Proximity Antennas see Chapter 6.1. 4.1.7. Filtering of Power Supply Disturbances on the supply pins may reduce the performance of the system. For that reason the supply is filtered but also to limit the spurious emissions at the supply connections caused by the digital parts of the module. 4.1.8. I/O Functions Two lines of the HITAG Proximity Reader Module are wired as inputs from e.g. switches, two as outputs to drive LEDs. On the read/write device space is reserved to connect LEDs as well as to connect e.g. two switches. Page 15 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 5. Rev. 2.0 November 1996 Postal Approval The postal approval can only be granted for final products, not just for components like the HITAG Proximity Reader Module. But the read/write device is designed in a way that it is possible to get the postal approvement for a device including the HITAG Proximity Reader Module. Electromagnetic emissions comply with the guidelines in FTZ 17 TR 2100 and ETS 300 683, electromagnetic immunity complies with the guidelines in ETS 300 683. Htrm440.doc/HS Page 16 of 27 November 1996 Rev. 2.0 Proximity Reader Module HT RM440 RM440 6. Connection of the Reader Module 6.1. Building HITAG Proximity Antennas The antenna is an important part in the data transmission process between read/write device and transponder. Therefore, you should be particularly careful when implementing the antenna in order to achieve optimum results. An essential aspect in dimensioning HITAG antennas is the ratio between the antenna diameter and the diameter of the transponder coil. This ratio should be within the limit values 3 and 1. If the ratio is too big or too small read/write distances can decrease and difficulties during data transmission may occur. For applications in which the transponders are to be only read, you can also use antennas that diverge from above mentioned instruction. 6.1.1. Basics The following block diagram shows the general architecture of a HITAG Proximity antenna and its connection to the HITAG Proximity Reader Module. with Antenna Equivalent Circuit f = 125 kHz R1 TX1 Î Û out Cs Rx Cs R2 R2 Ls L ÛL Rs AGND HITAG Core Module Antenna When developing an antenna, it is important to take into consideration the read/write device limits, i.e. maximum antenna current and maximum voltage at the receiver input. With an output voltage Ûout of about 2.5 Vp the following limits apply to the read/write device: maximum antenna current: 100 mAp maximum input voltage (at the receiver (ÛL): 32 Vp Page 17 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 Rev. 2.0 November 1996 The resistance R1 (22 Ohm) in the block diagram is used as current limiter. It protects the output stage in the event of a possible short circuit in the antenna and is already integrated in the read/write device. R2 (approx. 600 . 1000 ) has only to be used for antenna cable lengths of more than 500 mm. Antenna Coil 6.1.2. The inductance of the coil should be between 350 and 500 µH. The antenna quality factor should be approximately Q = 40. Q= 2f L RS Is the Q factor too high it must be reduced with an additional resistor. It is the aim not to need this additional resistor but use a lower wire diameter of the coil. The following formula describes the approximate calculation of the number of windings for a desired inductance and antenna geometry: a L = 2 a ln - K N 1.9 D The abbreviations read as follows: L a D N K . . . . . desired inductance [nH] antenna circumference [cm] wire diameter [cm] number of windings geometrical constant circular antenna : square antenna : K=1.01 K=1.47 Note: The factor K is normally much smaller than a/D and can be therefore left out: N 1.9 Htrm440.doc/HS L 2aln (a / D) Page 18 of 27 November 1996 6.1.3. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Measuring the Inductance The inductance of the coil designed following above listed instructions can be measured using the following measuring set-up: A sinus signal of 125 kHz is fed using a function generator. If you measure the current Î and the antenna voltage ÛL you can calculate the inductance according to the following formula: L= 6.1.4. UL I = 2×p×f Antenna Cable Length For optimal performance the antenna cable length should not exceed 5 m. 6.1.5. Antenna Tuning You have to tune the antenna in its final form with the connecting cable. You must not make any changes to the antenna coil or the connecting cable after you finished tuning because mechanical changes influence the electrical values and the antenna is detuned again. A sinus signal of 125 kHz is fed to the antenna using a frequency generator. You measure the voltages Û and ÛR with an oscilloscope. Then you change the frequency until Û and ÛR are in phase. If the resonance frequency thus arrived at is too high, you have to increase CS, if it is too low, you have to decrease CS. The aim is to arrive at a resonance frequency of 125 kHz using CS. Tune the antenna to a frequency of 125kHz ± 4kHz. Page 19 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 6.1.6. Rev. 2.0 November 1996 Determining the Serial Resistance of the Antenna Use an oscilloscope to measure ÛA and ÛR at a frequency of 125 kHz. You can calculate the serial resistance RS with the following formula: Î = 6.1.7. ÛR R3 Þ Rs = ÛA Î Checking the Antenna Voltage ÛL Before connecting the antenna to the read/write device as shown in the illustration below, you must carry out a check calculation of the input level of the read/write device according to the formulas further down in order to prevent damage. Î = Ûout 2.5 Vp Û out R1 + Rs + ( Re ) ÛL = L Î = 2 f (f = 125 kHz) The maximum value for ÛL reads 32 Vp , safeguarding against damage to the input level of the read/write device. With ÛL < 32 Vp the resistance Re can be omitted With ÛL > 32 Vp you have to calculate and insert Re according to the following formula: Re = L Htrm440.doc/HS Û out Û L max - R1 - Rs Þ Page 20 of 27 Re L 0,078 - 22 - Rs November 1996 6.1.8. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Procedure for Practical Antenna Design The procedure how to design a HITAG Proximity antenna is described in the previous chapters. The main steps are the following: 1. The desired inductance for the antenna coil can be chosen in a range between 350 and 500 µH, e.g. L = 420 µH). 2. The number of windings N can be calculated with the following formula: N = 1.9 L [nH] 2aln(a / D) - K N = 1. 9 420 000 = 2aln (a / D) - K for L = 420 µH: 633 1.9 aln(a / D) Note: The factor K (see also Chapter 6.1.2.) normally is much smaller than a/D and can be therefore left out. 3. Now the antenna can be built up with the desired dimensions ( circumference a) with the calculated number of turns. Note: The antenna coil must not be changed afterwards because with the mechanical dimensions the electrical specifications are changing too. That means the number of turns, the shape, arrangement of the coil windings and antenna supply cable must be in their final form. Note: Metal influences the electrical characteristics of the antenna very much. That is why all future tasks have to be done with the antenna in its final environment if metal will be in the antenna´s neighbourhoud (distance of the metal < maximum antenna diameter). 4. Measurement of the inductance L of the antenna is described in Chapter 6.1.3. 5. Determination of the serial capacitor CS is described in Chapter 6.1.5. Note: The capacitance of the antenna supply cable can be measured or found out in the data sheet of the cable (e.g. Cp = 180 pF/m). 6. Now the antenna has to be tuned according to Chapter 6.1.5. The tuning is acceptable if the resonce frequency is within a range of 125kHz ± 4kHz. 7. The serial resistance RS of the antenna is the impedance of the tuned antenna and is an ohmic resistance at the resonance frequency (f = 125 kHz). It can be calculated as shown in Chapter 6.1.6. Page 21 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 8. November 1996 To get a satisfactory reading distance the quality factor of the antenna coil (for non-metal environment) should be about Q = 40. The quality factor of a coil is calculated as follows: Q= 9. Rev. 2.0 L 2f L = RS RS By knowing RS and the dropping resistor (R1 = 22 ) it is possible to calculate the current Î and the antenna voltage ÛL. It is very important to calculate the antenna voltage before connecting the antenna to the HITAG Proximity Reader Module to avoid damage. Is the calculated value of ÛL higher than ÛL = 32 Vp a resistor Re has to be integrated to protect the module output circuit. The resistor has to be placed as shown in Chapter 6.1.7. 10. After checking the antenna voltage as described in point 9. connect your antenna to the HITAG Proximity Reader Module and measure the read/write distances with your transponders. If the read/write distances do not fulfill your expectations, the following points should be considered: · The size of the antenna and the size of the transponder have to be in a defined ratio (between 3 and 1). That means, if you increase the antenna over a certain size, the maximum read/write distances will decrease by the use of the same transponder. · The optimal shape of the antenna coil is a circle. The performance of a square shaped coil is much better than that of a rectangular shaped coil (with the same circumference). · To get better read/write distances the quality factor of the antenna coil should be increased, but it must not be higher than Q = 40. This can be reached by the following measures: - All conducting material has to be removed from the antenna environment. - A thicker wire can be used for the coil. - Ferrite can be placed behind the antenna coil to concentrate the field. - Extension of the antenna area. - There can be better results by trying another number of turns. Attention: All these measures must not differ from the antenna design instructions of Chapter 6.1. Note: With additional dropping resistor R1 and resistor Re the quality factor of the whole antenna system is about Q = 15. Htrm440.doc/HS Page 22 of 27 November 1996 Rev. 2.0 Proximity Reader Module HT RM440 RM440 Reference Antennas 6.1.9. Designing an antenna in the way described in this chapter you could use the following values: · · · · · 0.4 mm Cu - laqueur wire 35 turns Diameter of the turns (internal): Tuning frequency: Tuning Capacity depending on: 145 mm 125 kHz - length of the antenna cable - exact way of winding This antenna is best suitable for HITAG. In this performance reading distances of about 140 mm for cards and 130 mm for discs should be achieved. A further antenna configuration is: · · · · · 0.224 mm Cu - laqueur wire 52 turns Diameter of the turns (internal): Tuning frequency: Tuning Capacity depending on: 65 mm 125 kHz - length of the antenna cable - exact way of winding In this case cards and coins can be used and the following approximate communication distances should be achieved: read distance with HITAG 1 and HITAG 2 card: 105 mm read distance with HITAG 1 and HITAG 2 coin: 65 mm The third antenna configuration is the smallest one: · · · · · 0.224 mm Cu - laqueur wire 85 turns Diameter of the turns (internal): Tuning frequency: Tuning Capacity depending on: 35 mm 125 kHz - length of the antenna cable - exact way of winding Using this antenna coins and pills can be operated up to the following approximate distances: read distance with HITAG 1 coin: read distance with HITAG 1 pill: 50 mm 28 mm All distances are given in free air at room temperature. Specifications subject to change without notice. Page 23 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 6.2. Rev. 2.0 November 1996 Possible Sources of Errors by Connecting the HITAG Proximity Reader Module The following error list should be checked if any error (e.g. read/write distances that do not reach the specified values) occurs: · Power supply cable not mounted correctly. · Power supply not in the specified range (U = 9 - 16VDC 16VDC) · Serial interface not connected correctly. · Interference received by the antenna because of an external noise source (e.g. monitor, keyboards). Remedial measure: Removal of the antenna from the interfering area. · Connecting cables of the antenna changed by mistake. · Antenna is mounted in metal environment. Remedial measure: Mount a non-metal space keeper between the antenna and the metal. · Antenna is not designed following the design instructions of Chapter 6. · Inductance of the antenna is too high. · Quality factor of the antenna is too high (> 40). · Antenna current is too high. · Antenna voltage is too high. Htrm440.doc/HS Page 24 of 27 November 1996 7. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Security Considerations Developing the HITAG Proximity Reader Module special consideration was given to aspects of security. The following items represent the fundamental framework of the security concept: · · · · 7.1. cryptography mutual authentication password verification and Cyclic Redundancy Check (CRC) Operating Security The following mechanisms ensure the operation security of the HITAG system. 7.1.1. Anticollision Mode Anticollision Mode in Long Range applications permits you to process several transponders simultaneously. Theoretically up to 232 transponders can be processed simultanously. In practice this number is limited, because of the mutual influence of the transponders - they detune each other, if there are too many too close to each other. In proximity applications using HITAG 1 or HITAG 2 transponders, only one transponder is handled even if there are several transponders within the communication field of the antenna. In this case either no communication takes place or the "stronger" or closer transponder takes over. By muting a selected transponder (HALT Mode) another transponder that is to be found in the communication field of the antenna can be recognized. 7.1.2. Monitoring the Supply Voltage Supply voltage is controlled by a watch dog circuit which triggers a system reset if the supply voltage drops below 4.75 V or if the micro controller fails. 7.1.3. Antenna Rupture, Antenna Short Circuit The HITAG Proximity Reader Module does not get permanently damaged in case of an antenna rupture or a brief antenna short circuit. Page 25 of 27 Htrm440.doc/HS Proximity Reader Module HT RM440 RM440 7.2. Rev. 2.0 November 1996 Data Privacy The use of cryptography (Stream Cypher), mutual authentication, and password verification prevents monitoring and copying the data channel. Therefore, the area of the transponder that only can be accessed enciphered is called "secret area". To make use of cryptography for HITAG 1 transponders you need keys and logdata. Keys are used to initialise the crypto block and logdata are used for mutual authentication. To make use of cryptography for HITAG 2 transponders you need a key and passwords. The Key is used to initialise the crypto block using HITAG 2 in Crypto Mode and passwords are used for authentication for HITAG 2 in Password Mode. The transponders and the HITAG Proximity Reader Module are provided with identical transport keys and transport logdata so that you can start operating them right away. The KeyInit Password is set to 0x00000000, HITAG 1 Keys and Logdata are set to 0x00000000, HITAG 2 Key is set to 0x4D494B524F4E, HITAG 2 Password TAG to 0xAA4854 and HITAG 2 Password RWD to 0x4D494B52 by Philips Semiconductors (predefined transport values). In order to offer our OEM clients high flexibility, the configuration of the transponder memory, password, keys and logdata can be changed. We strictly recommend to rigorously restrict these possibilities for the end customers (by setting the configuration page to read only, setting password, keys and logdata to neither read nor write). Htrm440.doc/HS Page 26 of 27 November 1996 8. Rev. 2.0 Proximity Reader Module HT RM440 RM440 Ordering Information Type Name Description Ordering Number HT RM440/AIE RM440/AIE HITAG Proximity Reader Module, Interface RS232 RS232 9352 338 70122 HT RM440/BIE RM440/BIE HITAG Proximity Reader Module, Interface RS422 RS422 9352 338 80122 HT RM440/CIE RM440/CIE HITAG Proximity Reader Module, Interface RS485 RS485 9352 338 90122 Page 27 of 27 Htrm440.doc/HS Philips Semiconductors - a worldwide company Argentina: see South America Netherlands: Postbus 90050, 5600 PB EINDHOVEN, Bldg. VB, Australia: 34 Waterloo Road, NORTHRYDE, NSW 2113, Tel. +3140 27 82785, Fax +3140 27 88399 New Zealand: 2 Wagener Place, C.P.O. Box 1041, AUCKLAND, Tel. +612 9805 4455, Fax. +612 9805 4466 Austria: Computerstraße 6, A-1101 WIEN, P.O.Box 213, Tel. +649 849 4160, Fax. +649 849 7811 Norway: Box 1, Manglerud 0612, OSLO, Tel. +431 60 101, Fax. +431 30 101 1210 Belarus: Hotel Minsk Business Centre, Bld. 3, r.1211, Volodarski Str. 6, Tel. +4722 74 8000, Fax. +4722 74 8341 Philippines: Philips Semiconductors Philippines Inc., 220050 MINSK, Tel. +375172 200 733, Fax. +375172 200 773 Belgium: see The Netherlands 106 Valero St. Salcedo Village, P.O.Box 2108 MCC, MAKATI, Brazil: see South Africa Metro MANILA, Tel. +632 816 6380, Fax. +632 817 3474 Bulgaria: Philips Bulgaria Ltd., Energoproject, 15th floor, Poland: Ul. Lukiska 10, PL 04-123 WARSZWA, 51 James Bourchier Blvd., 1407 SOFIA Tel. +4822 612 2831, Fax. +4822 612 2327 Portugal: see Spain Tel. +3592 689 211, Fax. +3592 689 102 Canada: Philips Semiconductors/Components, Romania: see Italy Russia: Philips Russia, Ul. Usatcheva 35A, 119048 MOSCOW, Tel. +1800 234 7381 China/Hong Kong: 501 Hong Kong Industrial Technology Centre, Tel. +7095 247 9145, Fax. +7095 247 9144 Singapore: Lorong 1, Toa Payoh, SINGAPORE 1231, 72 Tat Chee Avenue, Kowloon Tong, HONG KONG, Tel. +85223 19 7888, Fax. +85223 19 7700 Tel. +65350 2538, Fax. +65251 6500 Colombia: see South America Slovakia: see Austria Czech Republic: see Austria Slovenia: see Italy Denmark: Prags Boulevard 80, PB 1919, DK-2300 DK-2300 COPENHAGEN S, South Africa: S.A. Philips Pty Ltd., 195-215 Main Road Martindale, Tel. +4532 88 2636, Fax. +4531 57 1949 2092 JOHANNESBURG, P.O.Box 7430 Johannesburg 2000, Finland: Sinikalliontie 3, FIN-02630 FIN-02630 ESPOO, Tel. +2711 470 5911, Fax. +2711 470 5494 South America: Rua do Rocio 220, 5th floor, Suite 51, Tel. +3589 61 5800, Fax. +3589 61 580/xxx France: 4 Rue du Port-aux-Vins, BP 317, 92156 SURESNES Cedex, 04552-903 Sao Paulo, SAO PAULO - SP, Brazil, Tel. +331 40 99 6161, Fax. +331 40 99 6427 Tel. +5511 821 2333, Fax. +5511 829 1849 Germany: Hammerbrookstraße 69, D-20097 D-20097 HAMBURG, Spain: Balmes 22, 08007 BARCELONA, Tel. +4940 23 53 60, Fax. +4940 23 536 300 Tel. +343 301 6312, Fax. +343 301 4107 Greece: No. 15, 25th March Street, GR 17778 TAVROS/ATHENS, Sweden: Kottbygatan 7, Akalla, S-16485 S-16485 STOCKHOLM, Tel. +301 4894 339/239, Fax. +301 4814 240 Tel. +468 632 2000, Fax. +468 632 2745 Hungary: see Austria Switzerland: Allmendstraße 140, CH-8027 CH-8027 ZÜRICH, India: Philips INDIA Ltd., Shivsagar Estate, A Block, Dr. Annie Besant Rd. Tel. +411 488 2686, Fax. +411 481 7730 Taiwan: Philips Taiwan Ltd., 2330F 2330F, 66, Worli, MUMBAI 400018, Tel. +9122 4938 541, Fax. +9122 4938 722 Indonesia: see Singapore Chung Hsiao West Road, Sec. 1, P.O.Box 22978, Ireland: Newstead, Clonskeagh, DUBLIN 14, TAIPEI 100, Tel. +8862 382 4443, Fax. +8862 382 4444 Thailand: Philips Electronics (Thailand) Ltd., Tel. +3531 7640 000, Fax. +3531 7640 200 Israel: RAPAC Electronics, 7 Kehilat Saloniki St., TEL AVIV 61180, 209/2 Sanpavuth-Bangna Road Prakanong, BANGKOK 10260, Tel. +9723 645 0444, Fax. +9723 649 1007 Tel. +662 745 4090, Fax. +662 398 0793 Italy: Philips Semiconductors, Piazza IV Novembre 3, Turkey: Talapasa Cad. No. 5, 80640 GÜLTEPE/ISTANBUL, 20124 MILANO, Tel. +392 6752 2531, Fax. +392 6752 2557 Tel. +90212 279 2770, Fax. +90212 282 6707 Japan: Philips Bldg. 13-37, Kohnan 2-chome, Minato-ku, TOKYO 108, Ukraine: Philips Ukraine, 4 Patrice Lumumba Str., Building B, Floor 7, Tel. +813 3740 5130,Fax. +813 3740 5077 252042 KIEV, Tel. +38044 264 2776, Fax. +38044 268 0461 Korea: Philips House, 260-199, Itaewon-dong, Yonsan-ku, SEOUL, United Kingdom: Philips Semiconductors Ltd., 276 Bath Road, Hayes, Tel. +822 709 1412, Fax. +822 709 1415 MIDDLESEX UM3 5BX, Tel. +44181 730 5000, Fax. +44181 754 8421 Malaysia: No. 76 Jalan Universiti, 46200 PETALING JAYA, Selangor, United States: 811 Argues Avenue, SUNNYVALE, CA94088-3409 CA94088-3409, Tel. +60 3750 5214, Fax. +603 757 4880 Tel. +1800 234 7381 Mexico: 5900 Gateway East, Suite 200, EL PASO, Texas 79905, Uruguay: see South America Vietnam: see Singapore Tel. +9 5800 234 7381 Middle East: see Italy Yugoslavia: Philips, Trg N. Pasica 5/v, 11000 BEOGRAD, Tel. +38111 625 344, Fax. +38111 635 777 Philips Semiconductors, Mikron-Weg 1, A-8101 Gratkorn, Austria Fax: +43 / 3124 / 299 - 270 For all other countries apply to: Philips Semiconductors, Marketing & Sales Communications, http://www.semiconductors.philips.com Building BE-p, P.O.Box 218, 5600 MD EINDHOVEN, The Netherlands, Fax: +3140 27 24825 Internet: © Philips Electronics N.V. 1996 SCB52 SCB52 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without any notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights.