TI S4100

S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
S4100 Multi-Function Reader Module Data Sheet
FEATURES:
• USART for I/O Communication
• Three General Purpose I/O lines
• Dual Frequency Operation
o 134.4KHz
o 13.56 MHz
• Multi-Protocol
o TI RFid LF Products
o TI RFid HF Tag-It
o ISO 15693
o ISO 14443 A/B
• Custom Firmware Downloadable
• Scalability/Modular Architecture
• Power On-Reset Operation
• Firmware Upgradable
DESCRIPTION
Texas Instruments’ RFid
S4100 Multi-Function Reader
communicates with
transponders and
vicinity/proximity cards
compliant with ISO/IEC 14443
A/B and ISO/IEC 15693. It
also supports Texas
Instruments' Low Frequency
DST, Read-Only, and ReadWrite Transponders at
134.2kHz, along with Tag-it
High Frequency Transponders
at 13.56MHz. This is
accomplished through
dedicated RF Analog Front
End (AFE) sections controlled
by a high-performance 8-bit
Advanced RISC
microcontroller with a Harvard
architecture, onboard FLASH,
EEPROM, and SRAM. The
power and flexibility of this
platform offer a scalable
Figure 1. S4100 Multi-Function Reader Module
APPLICATIONS:
•
Access Control
•
Vending Machines
•
Point of Sale Terminals
•
•
•
Printers
Wireless Payments
Handheld Devices
Figure 2. S4100 MFR Block Diagram
solution that can be fitted to a broad
range of applications.
The modular firmware architecture
makes it easy to produce and
download custom firmware to the unit,
and further simplifies integration into
new or existing products.
With support for a multitude of
contactless technologies, this module
is ideal for any contactless application,
and makes transitioning to new
technologies painless and transparent.
Copyright © 2003, Texas Instruments Incorporated
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
SPECIFICATIONS
Attributes
Part Number
Operating Frequency (HF)
Operating Frequency (LF)
Supported Transponders (HF)
Supported Transponders (LF)
Supported ISO Standards
Transmitter Power (HF)
Transmitter Peak-Current (LF)
Antenna Impedance (HF)
Antenna Impedance (LF)
Antenna Connection
User Interface response
Communication Interface
Synchronization
Approximate Dimensions:
Approximate Weight
RF-MGR-MNMN-N0
13.56 MHz
134.2 kHz
TI Tag-it™ inlays and transponders
ISO 15693 compliant inlays and transponders
ISO 14443 Type A/B compliant inlays and transponders
TI LF transponders (DST, R/W & R/O)
ISO 15693
ISO 14443 Type A & B
200 mW
1.1 Amps Peak
50 Ohms @ 13.56 MHz
440 µH (Approximately)
Independent on-board LF & HF Connections
Three General Purpose Inputs/Outputs
USART with up to 38.4 kbps data rate
Protocol synchronization via host
PWB: 2.75” x 1.5” x 0.4” (69 mm x 38 mm x 10 mm)
Module: 0.43 Oz (12.2 g)
Absolute Maximum Ratings*
Parameter
Value
Symbol
Supply Voltage
Operating Temperature
Storage Temperature
Soldering Temperature**
Soldering Time**
Min
+4.5
-20
-45
Vcc
Max
+5.5
+70
+85
260
5
Units
Volts
°C
°C
°C
Sec
DC Electrical Parameters
Parameter
Supply Voltage
Power On Reset
Symbol
Condition
Vcc
POR
Reset µC
Value
Typ
5.0
+4.38
Min
+4.75
+4.25
Max
+5.25
+4.5
Units
Volts
Volts
Current Parameters
Parameter
Receive Current
LF Transmit Current
HF Transmit Current
Symbol
Min
30
95
75
Value
Typ
60
140
120
Max
100
200
180
Units
mA
mA
mA
* Stresses beyond Absolute Maximum Ratings may cause permanent damage to the device. Exposure to Absolute Maximum Ratings for
extended periods may affect device reliability. As with all semiconductor products, proper measures with respect to ESD should be taken.
** Recommended solder: Kester 245 (SN63PB37), Recommended flux: Kester 951 (no clean flux)
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
CONNECTOR PIN-OUTS AND INTERFACE
Connector J1:
Connector
Input / Output
Signal Name
Pins
8
Input
RX Data
7
Output
TX Data
6
GP I/O
OUT 1
5
No Connection
No Connection
4
GP I/O
OUT 2
3
GP I/O
OUT 3
2
Ground
Ground
1
Input
Vcc
Connector: Oupiin 4472-8TD1
Mating Connector: Oupiin P/N 4472-1X8H (Housing), 4472-PIN-T (Pin)
Connected to
Interface, Sink / Source Current*
J8 pin 8
J8 pin 7
J8 pin 6, J7 pin 3
J8 pin 5
J8 pin 4, J7 pin 4
J8 pin 3
J8 pin 2
J8 pin 1
Isink_max = 20 mA at 5V
Isource_max = 20 mA at 5V
Isource_max = 20 mA at 5V
Isource_max = 20 mA at 5V
Isource_max = 20 mA at 5V
System Ground
Regulated Power Input
Connector J8:
Connector Pins Input / Output
Signal Name
Connected to
Interface, Sink / Source Current*
1
Input
Vcc
J1 pin 1
Regulated Power Input
2
Ground
Ground
J1 pin 2
System Ground
3
GP I/O
OUT 3
J1 pin 3
Isource_max = 20 mA at 5V
4
GP I/O
OUT 2
J1 pin 4, J7 pin 4
Isource_max = 20 mA at 5V
5
No Connection
No Connection
J1 pin 5
6
GP I/O
OUT 1
J1 pin 6, J7 pin 3
Isource_max = 20 mA at 5V
7
Output
TX Data
J1 pin 7
Isource_max = 20 mA at 5V
8
Input
RX Data
J1 pin 8
Isink_max = 20 mA at 5V
Connector Type: Header 8 pin 100 mil center
* Connectors J1 and J8 are connected in parallel. If using both connectors, please observe maximum current limits.
Connector J4:
Connector Input /
Signal Name
Pins
Output
1
Ground HF Antenna Ground
2
Output
HF Antenna Output
Connector Type: Header 8 pin 100 mil center
Connected
to
J7 pin 1
J7 pin 2
Connector J5:
Connector Input /
Signal Name
Pins
Output
1
Output
LF Ant High
2
Output
LF Ant Low
Connector Type: Header 2 pin 100 mil center
Connected
to
J7 pin 6
J7 pin 5
Connector J7:
Connector Pins Input / Output
1
Ground
2
Output
3
GP I/O
4
GP I/O
5
Output
6
Output
Connector: Molex P/N 52207-0690
Signal Name
HF Antenna Ground
HF Antenna Output
OUT 1
OUT 2
LF Ant Low
LF Ant High
Notes
50 Ω
Notes
Figure 3. Connector Locations
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Connected to
J4 pin 1
J4 pin 2
J1 pin 6, J8 pin 6
J1 pin 4, J8 pin 4
J5 pin 2
J5 pin 1
Interface, Sink / Source Current
50 Ω
Isource_max = 20 mA at 5V
Isource_max = 20 mA at 5V
400 to 700 uH, 440 uH typical
between LF Ant 1 and LF Ant 2
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
INPUT/OUTPUT INTERFACE
Input /
Location
Signal Name
Output
Signal Definition
Interface Circuitry
Input voltage from low-noise regulated
power supply.
Ground
Vcc
Input
J1 pin 1, J8 pin 1
Ground
Ground
J1 pin 2, J8 pin 2
OUT 3
GP I/O
J1 pin 3, J8 pin 3
OUT 2
GP I/O
J1 pin 4, J7 pin 4,
J8 pin 4
OUT 1
GP I/O
J1 pin 6, J7 pin 3,
J8 pin 6
TX Data
Output
J1 pin 7, J8 pin 7
RX Data
Input
J1 pin 8, J8 pin 8
HF Antenna
Ground
Ground
J4 pin 1, J7 pin 1
Only J4 pin 1 should be used for antenna
ground.
HF Antenna
Output
Output
J4 pin 2, J7 pin 2
Output to matched 50 Ω HF antenna.
LF Ant High
Output
J5 pin 1, J7 pin 6
5.5 V
A low to high transition of this signal line
indicates a successful read of a LF
transponder.
A low to high transition of this signal line
indicates a successful read of a HF
transponder.
A low to high transition of this signal line
indicates a successful read of a LF or HF
transponder.
Transmit serial data (DCE) to application
communications interface. Max data rate
is 38.4 kbps.
Receive serial data (DCE) from
application communications interface.
Max data rate is 38.4 kbps.
Max
Values*
5.5 V
5.5 V
5.5 V
5.5 V
TTL Signal Level
Isource_max = 20 mA at 5V
5.5 V
5.5 V
5.5 V
LF Antenna Coil Balanced Output Neither leg should be grounded.
LF Ant Low
Output
J5 Pin 2, J7 pin 5
5.5 V
* Externally applied voltages from pin to ground cannot exceed these values.
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
MFR READER SYSTEM OVERVIEW
A complete reader system employing the S4100 MFR module consists of the module, an HF (13.56 MHz) section
and/or an LF (134.2 kHz) section, an I/O section, and a power supply. Communication with the circuit is achieved
by means of a three wire serial link (USART). The microprocessor interface provides on-chip data encoding and
recovery, thereby minimizing software design efforts on the part of the user.
The S4100 allows access to the full feature set and onboard data storage of each contactless technology using
high-level and low-level commands available through the onboard USART, or directly coded into applicationspecific firmware loaded into the onboard FLASH. The S4100 provides a boot loader that allows standard or
customized firmware to be downloaded via the onboard USART. The ability to execute application-specific
firmware onboard the S4100 offers a mechanism for maximizing RF processing speed while minimizing the total
cost of new contactless applications.
The HF and LF Analog Front Ends (AFE) produce the necessary RF transmit signals for each technology as
driven by the onboard microcontroller. The AFEs also contain the receiver function to filter and demodulate
transponder response signals for further decoding by the microcontroller. The S4100 provides the ability to read
multiple tokens across multiple technologies by polling each technology individually and performing the
anticollision/arbitration required.
Figure 4. A Complete System Diagram Which includes the S4100 Module.
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
13.56 MHz OPERATION
The 13.56MHz AFE transmitter consists of low impedance MOSFET with a matching network optimized to drive a
50Ω antenna resonating at 13.56MHz. The receiver section is also coupled into this network, detecting the token's
load-modulated response. The board matching network transforms the antenna’s nominal 50Ω characteristic
impedance to the proper load impedance required for the AFE. The output of the HF AFE is single-ended with one
side connected to ground. The antenna should be connected using a coaxial connection.
Depending upon the protocol used, the transmitted carrier is modulated as needed for that transponder (10% or
100% modulation), then held at full power in order to detect the load-modulated response. This response is then
demodulated, filtered, and prepared (via configurable gain and demodulation sections) for final decoding by the
microcontroller.
The HF Section of the S4100 MFR module offers a path for the development of a broad range of 13.56 MHz RFID
readers, providing the receive/transmit functions required to communicate with a variety of transponders operating
in the 13.56 MHz ISM band.
The transmitter provides a nominal 200 mW of RF power to a matched 50 ohm load.
Using a 1.5” diameter antenna and TI’s ISO 15693 compliant rectangular inlay, read ranges are typically equal to
or greater than 4”. Using the same antenna with TI’s ISO 14443 Key Fob inlay, read ranges are typically equal to
or greater than 1.5” Using larger antennas may significantly increase these read ranges.
134.2 kHz OPERATION
The 134.2kHz AFE consists of a bridge driver for carrier transmission and a high-gain receiver section for
detecting the transponder response. These sections are coupled together and designed for optimal resonance
with a 440uH coil antenna attached to the two-pin LF antenna port. Although the full bridge is protected against a
direct or resistive short to GROUND, it is designed to drive the antenna differentially. Thus, the two-port coil
antenna must be isolated from ground for proper operation.
The full bridge drives the antenna current at the 134.2kHz carrier frequency during the charge phase and the
active time of the write phase. When the full bridge is not active, the two driver outputs switch to GROUND. With
one driver port coupled to the connected antenna through the resonance capacitor, the circuit produced by the
grounded outputs allows the antenna to resonate for reception of the transponder signal (uplink).
After an initial gain stage, the received transponder uplink signal is band-pass filtered from 65kHz to 260kHz to
capture the FSK uplink nominal frequencies of 134.2kHz and 123.2kHz and reject out-of-band noise. The
received signal is then limited for decoding.
The LF antenna consists of an antenna coil connected to connector J5 pins 1 and 2. The coil inductance can vary
anywhere from 400 µH to 700 µH, with 440 µH being optimum.
Using a coil antenna approximately 2” in diameter and TI’s DST Key Fob, read ranges are typically greater than or
equal to 4 inches.
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
TYPICAL APPLICATION
Figure 7 is a schematic showing example circuitry for typical I/O schemes. Circuitry for RS-232 serial
communications is provided, as well as that for user feedback elements such as LEDs and audio transducers.
The connections available at connector J1 are also available from the header connector J8.
Figure 7. Interface Circuitry.
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S4100 MULTI-FUNCTION READER MODULE
11-06-22-715 10/2003
MECHANICAL PROPERTIES
Figure 8 describes board dimensions and mounting hole locations. The module is designed to be easily mounted
to a motherboard, communicating through the header pins, but can also be inserted into existing equipment using
connectors J1 and J7 for connectivity.
Figure 8. MFR Module Board Dimensions.
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at any time without notice. TI provides customer assistance in various technical areas, but does not have full access to data
concerning the use and applications of customer's products. Therefore, TI assumes no liability and is not responsible for
customer applications or product or software design or performance relating to systems or applications incorporating TI
products. In addition, TI assumes no liability and is not responsible for infringement of patents and/or any other intellectual or
industrial property rights of third parties, which may result from assistance provided by TI. TI products are not designed,
intended, authorized or warranted to be suitable for life support applications or any other life critical applications which could
involve potential risk of death, personal injury or severe property or environmental damage.
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