ATMEL TK5552 User Manual
查询TK5552 供应商
Read/Write Transponder
Description
The TK5552 is a complete programmable R/W
transponder which implements all important functions
for identification systems. It allows the contactless
reading (uplink) and writing (downlink) of data which are
transmitted bidirectionally between a read/ write
basestation and the transponder. It is a plastic-cube device
which accomodates the IDIC *) T ransponder IC and also
the antenna realized as an LC-circuit. No additional
external power supply is necessary for the transponder
because it receives power from the RF field generated by
Features
D Contactless read/write data transmission
TK5552
the base station. Data are transmitted by modulating the
amplitude of the RF field (uplink mode). The TK5552 can
be used to adjust and modify the ID-code or any other
stored data, e.g. rolling code systems. The on-chip
1056-Bit EEPROM (32 blocks, 33 bits per block) can be
read (uplink) and written (downlink) blockwise from the
base station. The blocks can be protected against
overwriting. One block is reserved for setting the
operation modes of the IC.
D Write protection by lock bits
D 992-bit EEPROM user programmable in 31 blocks
32 bits
D Inductive coupled power supply at 125 kHz
D Basic component: R/W IDIC
D Built-in coil and capacitor for circuit antenna
D Starts with cyclical data read out
D Typical < 50 ms to write and verify a block
D Modulation defeat (for EAS)
D Direct access to each block
D Configurable POR delay
Transponder IC
RF field
Power
Data
D Malprogramming protection
D Configurable options:
Bitrate [bit/s]: RF/16 and RF/32
Modulation: Manchester
POR delay: 1 ms / 65 ms
Max. block: 0, 1, 1 to 2, 1 to 3,
1 to 4, .... 1 to 31
Application
D Industrial asset management
D Process control and automation
D Installation and medical equipment
T ransponder TK5552
Transponder IC + coil + C in plastic cube
C
Transponder IC
Coil
Base station
*)
IDIC stands for IDentification Integrated Circuit and is a trademark of Atmel Wireless & Microcontrollers.
Rev. A5, 04-Oct-00 1 (20)
**)
**) for short distance U2270 B read/ write IC with MARC4 (see figure 12)
Figure 1. Transponder and base station
Preliminary Information
TK5552
Ordering Information
Extended Type Number Package Remarks
TK5552A–PP Plastic cube All kind of modulation; RF/16 and RF/32 *)
Default programmed: Manchester Modulation, RF/16,
MAXBLK = 1 to 31
*) see data sheet Transponder IC in the appendix
General
The transponder is the mobile part of the closed coupled
identification system (see figure 1), whereas the
read/ write base station is basing on the U2270B or other
solutions, and the read/ write transponder is basing on the
IDIC Transponder IC.
The transponder is a plastic-cube device consisting of
following parts:
D The transponder antenna, realized as tuned LC-circuit
D Read/ write IDIC (Transponder IC) with EEPROM
The 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 for improving the distance of
read (uplink) and write (downlink) operations.
The Read/ Write IDIC
The read/ write IDIC Transponder IC is part of the transponder TK5552. The data are transmitted bidirectionally
between the base station and the transponder. The transponder receives power via a single coil from the RF signal
generated by the base station. The single coil is connected
to the chip and also serves as the IC’s bidirectional communication interface.
Data are transmitted by modulating the amplitude of the
RF signal. Reading (uplink) occurs by damping the coil
by an internal load. Writing (downlink) occurs by
interrupting the RF field in a specific way. The TK5552
transponder operates at a nominal frequency of 125 kHz.
There are different bit rates and encoding schemes.
The on-chip 1056-bit EEPROM (32 block, 33 bits each)
can be read (uplink) and written (downlink) blockwise
from the base station. The blocks can be protected against
overwriting by using lock bits. One block is reserved for
setting the operation modes of the IC.
See Transponder IC data sheet in the appendix for more
detailed information of IDIC .
2 (20)
POR Bit decoderBit rate generator
Charge
Clock-A
pump
Start-up
delay
Analog front end
(rectifier, regulator, clock extractor, ESD protection)
Mode
Controller
Input register
Figure 2. Block diagram Transponder IC
EEPROM memory
register
Modulator
Rev. A5, 04-Oct-00
Clock-B
Preliminary Information
TK5552
Absolute Maximum Ratings
Parameters Symbol Value Unit
Operating temperature range T
Storage temperature range T
Maximum assembly temperature, t < 5 min. T
Magnetic field strength at 125 kHz H
amb
stg
ass
pp
Operating Characteristics Transponder
T
=
amb
25°C, f = 125 kHz Rf/32 and Manchester if not otherwise noted
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Inductance L 4 mH
Resonance frequency LC circuit, HPP = 12 A/m f
Magnetic field strength (H)
Parameters Test Conditions Symbol Min. Typ. Max. Unit
Max. field strength where
tag does not modulate
Minimum field strength
Uplink/ downlink mode H
Programming mode H
Data retention EEPROM t
Programming cycles
EEPROM
Maximum field strength H
No influence to other tags
in the field
r
H
pp not
pp 25
pp 25
retention
pp max
119 125 131 kHz
100,000
–25 to +75 °C
–40 to +125 °C
170 °C
1000 A/m
4 A/m
12 A/m
18 A/m
10 Years
600 A/m
Rev. A5, 04-Oct-00 3 (20)
Preliminary Information
TK5552
4
3
2
1
0
–1
–2
–3
TK of resonance frequency ( % )
–4
–30–20 –100 1020304050607080
Temperature ( °C )
V2V1
V1 * V2
m +
V1 ) V2
Figure 3. Typical TK-range of resonance frequency
0.7
0.6
0.5
0.4
m ( 1 )
0.3
0.2
0.1
0.0
0 25 50 75 100 125
Quality factor (Q)
Hpp ( A/m)
Figure 4. Degree of modulation measurement
Degree of modulation (m)
Resonant frequency
127
126
125
124
123
122
121
120
35
30
25
20
Q ( 1 )
fres (kHz)
15
10
5
0
4 (20)
Figure 5. Typical behaviour of resonant frequency, degree of modulation and quality factor versus field strength
(by Rf/ 32, Manchester )
Rev. A5, 04-Oct-00
Preliminary Information
Measurement Assembly
All parameters are measured in a Helmholtz-arrangement, which generates a homogenous magnetic field (see
figure 6 and 7). A function generator drives the field
SENSING COILS ( IN PHASE )
TK5552
REFERENCE COIL
( IN PHASE )
FIELD GENERATING
COILS ( IN PHASE )
FUNCTION
GENERATOR
TK5552
generating coils, so the magnetic field can be varied in
frequency and field strength.
SUBTRACTOR
REFERENCE COIL ( IN PHASE )
AMPLIFIER
1:10
OUTPUT
VOLTAGE
24mm
REFERENCE COIL
Figure 6. Testing application
SENSING COIL
5mm
FIELD GENERATING COIL
TK5552
2mm
30mm
15mm
60mm
REFERENCE COIL
SENSING COIL
FIELD GENERATING COIL
Figure 7. Testing geometry
Rev. A5, 04-Oct-00 5 (20)
Preliminary Information
TK5552
Downlink Operation
The write sequence (downlink mode) of the TK5552 is
shown below. Writing data into the transponder occurs by
interrupting the RF field with short gaps. After the start
gap the standard OP-code (11) is followed by the lockbit.
The next 32 bits contain the actual data. The last 5 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.
RF field
Uplink mode Downlink mode
Standard OP–code
Start gap
Lock
bit
32 bit
01
Figure 8. Downlink protocol
Address bits (e.g. block 16)
01
0
0
> 64 clocks1 0
6 (20)
Figure 9. Explanation of the programming cycle
Rev. A5, 04-Oct-00
Preliminary Information
Loading...