View TK5561A-PP_1325613.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

Features
* * * * * * * * * * * * * *
65 ms Cycle Time for Crypto Algorithm Programming Encryption Time < 10 ms, < 30 ms Optional Identification Transponder in Plastic Cube Contactless Read/Write Data Transmission High-security Crypto Algorithm Optional Inductive Coupled Power Supply at 125 kHz Basic Component R/W e5561 IDICa Built-in Coil and Capacitor for Circuit Antenna Starts with Cyclical Data Read Out Self-adapting Resonance Frequency (Optional) 128-bit User-programmable EEPROM Typical < 50 ms to Write and Verify a Block Read/Write Protection by Lock Bits Options Set by EEPROM: - Bit Rate (Bit/s): Rf/32, Rf/64 - Modulaton: Manchester, Biphase
Application
* Car Immobilizers with Higher Security Level * High-security Identification Systems
Read/Write Crypto Transponder for Short Cycle Time TK5561A-PP
Description
The TK5561A-PP is a complete transponder integrating all important functions for immobilizer and identification systems. It consists of a plastic cube which accommodates the crypto IDIC e5561A and the antenna realized as tuned LC-circuit. The TK5561A-PP is a R/W crypto transponder for applications which demand higher security levels than those which standard R/W transponders can fulfil. For this reason, the TK5561A-PP has an additional encryption algorithm block which enables a base station to authenticate the transponder. Any attempt to fake the base station with a wrong transponder will be recognized immediately. For authentication, the base station transmits a challenge to the TK5561A-PP. This challenge is encrypted by both the IC and the base station. Both should possess the same secret key. Only then can the results be expected to be equal. For detailed technical information about functions, configurations etc., please refer to the e5561 data sheet.
Rev. 4682A-RFID-02/03
1
Figure 1. Transponder and Base Station
Transponder TK5561A-PP RF field (e5561A + coil + C in plastic cube) C Power ID Challenge Response Coil e5561A
Base station U2270B read/write IC MARC4 series mc
Figure 2. Block Diagram
MODULATOR CRYPTO CIRCUIT Coil 1 MODE REGISTER
ANALOG FRONT END WRITE DECODER
ADAPT
BIT RATE GENERATOR
Coil 2
crypto control OP-code detect EEPROM control read/write control
(320 bit EEPROM) crypto key
64 or 128 bit ID code
TESTLOGIC INPUT REGISTER POR
VDD VSS
Test pads
2
TK5561A-PP
4682A-RFID-02/03
HV GENERATOR
CONTROLLER
Memory
TK5561A-PP
General
The transponder is the mobile part of the closed coupled identification system (see Figure 1), whereas the read/write base station is based on the U2270B or on discrete solutions, and the read/write transponder is based on the e5561A IDIC. The transponder is a plastic-cube device consisting of the following parts: * * The transponder antenna, with a tuned LC-circuit Read/write IDIC (e5561A) with EEPROM
Transponder Antenna
The antenna consists of a coil and a capacitor for tuning the circuit to the nominal carrier frequency of 125 kHz. The coil has a ferrite core to improve the read, write and programming operation distances. The e5561A is a member of the Atmel's contactless IDentification IC (IDIC) family, which are used in applications where information has to be transmitted without contacts. The IDIC is connected to a tuned LC circuit for power supply and bidirectional data communication (Read/Write) to a base station. The on-chip non-volatile memory of the 320-bit EEPROM (10 blocks, 32 bits each) can be read and written blockwise by a read/write base station, e.g. based on the U2270B. Up to four blocks consisting of the user programmable ID code, the crypto key and configurations are stored in six blocks. The crypto key and the ID code can be individually protected against overwriting. The typical operational frequency of the TK5561A-PP is 125 kHz. Two data bit rates are programmable: Rf/32 and Rf/64. During the reading operation the incoming RF field is dampened bit-wise by an on-chip load. This AM-modulation is detected by the field generating base station unit. Data transmission starts after power-up with the transmission of the ID code and continues as long as the TK5561A-PP is powered. Writing is carried out by means of Atmel's patented writing method. To transmit data to the TK5561A-PP the read/write base station has to interrupt the RF field for a short time to create a field gap. The information is encoded in the number of clock cycles between two subsequent gaps. See the e5561A data sheet for detailed information of the IDIC.
Read/Write Crypto Identification
3
4682A-RFID-02/03
Absolute Maximum Ratings
Parameter
Operating temperature range Storage temperature range Maximum assembly temperature, t < 5 min Magnetic field strength at 125 kHz
Symbol
Tamb Tstg Tass Hpp
Value
-40 to +85 -40 to +125 170 1000
Unit
C C C A/m
Operating Characteristics Transponder
Tamb = 25C, f = 125 kHz unless otherwise specified
Parameters
Inductance
Test Conditions
Symbol
L
Min.
Typ.
4.2
Max.
Unit
mH
LC circuit, Hpp = 20 A/m
Resonance frequency Quality factor Tamb = -40 to +85C fr QLC No influence to other transponders in the field Tamb = -40C Read mode Tamb = 25C Tamb = 85C Tamb = -40C Programming mode Lowest adapt frequency Highest adapt frequency Data retention EEPROM Programming cycles EEPROM Programming time/block Maximum field strength RF = 125 kHz tp Hpp max T = 25C Tamb = 25C Tamb = 85C Hpp not 121 5 125 8 5 129 11 A/m kHz
Magnetic Field Strength (H)
Max. field strength where transponder does not modulate
Minimum Field Strength (H)
Hpp -40 Hpp 25 Hpp 85 Hpp -40 Hpp 25 Hpp 85 fLA fHA tretention 118 125 10
100,000
24 18 15 30 35 40 121 128 124.5 131.5
A/m A/m A/m A/m A/m A/m kHz kHz Years
16 600
ms A/m
4
TK5561A-PP
4682A-RFID-02/03
TK5561A-PP
Figure 3. Typical Curve for Degree of Modulation
0.5
0.4
0.3
DV (V)
0.2
0.1
0.0 0 20 40 60 80 100 120
Hpp (A/m)
Figure 4. Measurement of the Degree of Modulation
V1
V2
V1 - V2 m = -------------------V1 + V2
5
4682A-RFID-02/03
Measurement Assembly
All parameters are measured in a Helmholtz-arrangement, which generates a homogenous magnetic field (see Figure 5 and Figure 6). A function generator drives the field generating coils, so the magnetic field can be varied in frequency and field strength. Figure 5. Testing Application
SENSING COILS ( IN PHASE ) SUBTRACTOR AMPLIFIER 1:10 REFERENCE COIL ( IN PHASE ) REFERENCE COIL ( IN PHASE ) OUTPUT VOLTAGE
TK5561A-PP
FIELD GENERATING COILS ( IN PHASE )
FUNCTION GENERATOR
Figure 6. Testing Geometry
l = 30 mm
Transponder
22 mm d = 60 mm
REFERENCE COIL SENSING COIL SENSING COIL
REFERENCE COIL
5 mm FIELD GENERATING COIL FIELD GENERATING COIL
6
TK5561A-PP
4682A-RFID-02/03
TK5561A-PP
Writing Data into the TK5561A-PP
A write sequence of the TK5561A-PP is shown in Figure 7. Writing data into the transponder occurs by interrupting the RF field with short gaps. After the start gap the write op-code (10) is transmitted. The next 32 bits contain the actual data. The last 4 bits denote the destination block address. If the correct number of bits have been received, the actual data is programmed into the specified memory block.
Figure 7. Write Protocol to Program the EEPROM
RF field Standard op-code 1 Start gap Read mode Write mode 0 32 bit Address bits (e.g. block 2) 0 1 0 0 > 64 clocks
Writing Data Decoding
The time elapsing between two detected gaps is used to encode the information. As soon as a gap is detected, a counter starts counting the number of field clock cycles until the next gap is detected. Depending on how many field clocks elapse, the data is regarded as 0 or 1. The required number of field clocks is shown in Figure 8. A valid 0 is assumed if the number of counted clock periods is between 16 and 31, for a valid 1 it is 48 or 63 respectively. Any other value being detected results in an error and the device exits write mode and returns to read mode.
Figure 8. Write Data Decoding Scheme
Field clock cycles Write data decoder 1 fail 16 0 32 fail 48 1 64 writing done
EOT
Actual Device Behavior
The TK5561A-PP detects a gap if the voltage across the coils decreases below a peakto-peak value of about 800 mV. Until then, the clock pulses are counted. The number given for a valid 0 or 1 (see Figure 8) refers to the actual clock pulses counted by the device. However, there are always more clock pulses being counted than were applied by the base station. The reason for this is the fact that an RF field cannot be switched off immediately. The coil voltage decreases exponentially. So although the RF field coming from the base station is switched off, it takes some time until the voltage across the coils reaches the threshold peak-to-peak value of about 800 mV and the device detects the gap. Referring to the following diagram Figure 9, this means that the device uses the times t0 internal and t1 internal. The exact times for t0 and t1 are dependent on the application (e.g., field strength, etc.) Typical time frames are: t0 = 60 to 140 s t1 = 300 to 400 s tgap = 150 to 400 s Antennas with a high Q-factor require longer times for tgap and shorter time values for t0 and t1.
7
4682A-RFID-02/03
Figure 9. Ideal and Actual Signal Behavior
Coil voltage t1 1 tgap t 0 0 1 Coil voltage t1 1 t1 internal
Gap detect Ideal behavior RF level reduces to zero immediately Gap detect Actual behavior RF level decreases exponentially
tgap
t0 0 t0 internal 1
Operating Distance
The maximum distance between the base station and the TK5561A-PP depends mainly on the base station, the coil geometries and the chosen modulation options. Typical distances are 0 to 3 cm. A general maximum distance value cannot be given. A convenient way is to measure the TK5561A-PP within its environment. Rules for a correct base-station design can be provided upon request (see Antenna Design Guide).
Application
Figure 10. Complete Transponder System with the U2270B Read/Write IC
5V 5V VBatt 47 nF 22 mF 680 pF Input 4.7 kW 1N4148 470 kW 1.5 nF C31
Power Data
VEXT VS U2270B RF MS CFE OE Standby Output Gain
110 kW
VDD M44C260
DVS
BP00 BP01 BP02 BP03 BP10
osc IN 32 kHz
osc OUT
COIL2 1.2 nF 1.35 mH R COIL1 DGND GND VSS Read/Write circuit 100 nF Microcontroller
e5561A Transponde r TK5561A-PP
f res=
1 2p LC
= 125 kHz
8
TK5561A-PP
4682A-RFID-02/03
TK5561A-PP
Mechanical Specification
Figure 11. Mechanical Drawing of Transponder
Dimensions in mm
Ordering Information
Extended Type Number
TK5561A-PP
Package
-
Remarks
A = Version of e5561 IDIC
9
4682A-RFID-02/03
Atmel Headquarters
Corporate Headquarters
2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600
Atmel Operations
Memory
2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314
RF/Automotive
Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759
Europe
Atmel Sarl Route des Arsenaux 41 Case Postale 80 CH-1705 Fribourg Switzerland TEL (41) 26-426-5555 FAX (41) 26-426-5500
Microcontrollers
2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 La Chantrerie BP 70602 44306 Nantes Cedex 3, France TEL (33) 2-40-18-18-18 FAX (33) 2-40-18-19-60
Biometrics/Imaging/Hi-Rel MPU/ High Speed Converters/RF Datacom
Avenue de Rochepleine BP 123 38521 Saint-Egreve Cedex, France TEL (33) 4-76-58-30-00 FAX (33) 4-76-58-34-80
Asia
Room 1219 Chinachem Golden Plaza 77 Mody Road Tsimhatsui East Kowloon Hong Kong TEL (852) 2721-9778 FAX (852) 2722-1369
ASIC/ASSP/Smart Cards
Zone Industrielle 13106 Rousset Cedex, France TEL (33) 4-42-53-60-00 FAX (33) 4-42-53-60-01 1150 East Cheyenne Mtn. Blvd. Colorado Springs, CO 80906 TEL 1(719) 576-3300 FAX 1(719) 540-1759 Scottish Enterprise Technology Park Maxwell Building East Kilbride G75 0QR, Scotland TEL (44) 1355-803-000 FAX (44) 1355-242-743
Japan
9F, Tonetsu Shinkawa Bldg. 1-24-8 Shinkawa Chuo-ku, Tokyo 104-0033 Japan TEL (81) 3-3523-3551 FAX (81) 3-3523-7581
e-mail
literature@atmel.com
Web Site
http://www.atmel.com
(c) Atmel Corporation 2003. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company's standard warranty which is detailed in Atmel's Terms and Conditions located on the Company's web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein. No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems.
Atmel (R) is the registered trademark of Atmel. IDIC O stands for IDentification Integrated Circuit and is a registered trademark of Atmel Germany GmbH. Other terms and product names may be the trademarks of others. Printed on recycled paper.
4682A-RFID-02/03 xM

▲Up To Search▲

Price & Availability of TK5561A-PP

	To Download TK5561A-PP Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .