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LFMICROEVALKIT
User Manual
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manual update
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Texas Instruments LFMICROEVALKIT User Manual

May ’00 Preface
Series 2000 Reader System
Micro-reader RI-STU-MRD1
Reference Guide
11-06-21-027 May 2000
1
Edition Three - May 2000
This is the third edition of this manual, it describes the following equipment:
TIRIS Micro-reader Module
Texas Instruments (TI) reserves the right to make changes to its products or services or to discontinue any p roduc t o r se rvi ce at a ny ti me with out not ic e. T I prov id es cu s­tomer assistance i n various technic al areas, but do es not have full ac cess 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 produ cts. In addi tion, TI assu mes no liab ility and i s not respons ible for infringement of patents and/or any other intell ectual or industrial proper ty 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 a ny othe r li fe cr iti ca l appl ic ati on s wh ic h cou ld inv ol v e po ten­tial risk of death, personal injury or severe property or environmental damage.
RI-STU-MRD1
The Incorporated.
Copyright 2000 Texas Instruments Incorporated (TI) This document may be downloaded onto a computer, stored and duplicated as nec-
essary to support the us e of the related TI products. Any othe r type of duplicatio n, circulation or storage on data carriers in any manner not authorized by TI represents a violation of the applicable copyright laws and shall be prosecuted.
logo and the word
TIRIS
are registered trademarks of Texas Instruments
TIRIS
2
About This Guide
Conventions
PREFACE
Read This First
This manual describes the TIRIS Micro-reader, its goal is to describe the reader, how it works, how to integrate it and how to use it.
WARNING:
A
WARNING IS USED WHERE CARE MUST BE TAKEN, OR A CERTAIN
PROCEDURE
TO
HARM
CAUTION:
MUST BE FOLLOWED IN ORDER TO PREVENT INJURY OR
YOUR HEALTH
.
If You Need Assistance
Application Centers are located in Europe, North and S outh Amer ica, the Far E ast and Australia to provide direct su pport. For more information, please contact your nearest TIRIS Sales and Application Center. The contact addresses can be found on our home page:
This indicates information on conditions which must be met, or a procedure which must be followed, which if not heeded could cause permanent damage to the equipment or software.
Note:
Indicates conditions which must be met, or procedures which must be followed, to ensure proper functioning of the equipment or software.
Information:
Indicates information which makes usage of the equipment or soft­ware easier
http://www.tiris.com
3
Document Overview
Page
Chapter 1: Product Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 General............................................................................................... 6
1.2 Product Description....................................... ...... ....... ...... ....... ........... 6
1.3 Connector Pins................................................................................... 9
Chapter 2: Communications Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.1 Protocol PC to Micro-reader............................................................. 15
2.2 Protocol Micro-reader to PC............................................................. 18
Chapter 3: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.1 Recommended Operating Conditions .............................................. 21
3.2 Timings............................................................................................. 22
3.3 Mechanical Data............................................................................... 22
Chapter 4: Transponder Protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1 Transponder commands .................................................................. 24
4.2 Transponder Responses.................................................................. 27
Chapter 5: Communication Protocol Examples . . . . . . . . . . . . . . . . . . . . . . . 29
5.1 PC to Micro-reader........................................................................... 30
5.1 PC to Micro-reader........................................................................... 30
Appendix A:CE Declaration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Appendix B:Demonstration Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Appendix C:Antenna Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
List of Figures
Figure 1: Micro-reader Module....................................................................... 6
Figure 2: Micro-reader Pin Connections ........................................................ 9
Figure 3: Block Diagram of the Micro-reader ............................................... 12
Figure 4: Antenna Circuit Block Diagram..................................................... 13
Figure 5: Top, Front and Side View (measurements in mm) ....................... 22
Figure 6: Read Function............................................................................... 24
Figure 7: Programming Data Format of the 64-bit Read/Write Transponder24
Figure 8: Data Format of the General Read Page Function ........................ 25
Figure 9: Programming Data Format of the MPT......................................... 25
Figure 10: Lock Page of MPT/SAMPT......................................................... 25
Figure 11: Data Format of the Selective Read Page Function..................... 26
Figure 12: Data Format of the Selective Program Page Function ............... 26
Figure 13: Data format of the Selective Lock Page function........................ 26
Figure 14: RO Read Data Format................................................................ 27
Figure 15: R/W Read Data Format .............................................................. 27
Figure 16: MPT/SAMPT Read Data Format ................................................ 27
Figure 17: Micro-reader Demonstration Circuit ............................................ 36
Page
List of Tables
Table 1: Pin Connections ............................................................................... 9
4
Page
Chapter 1: Product Description
This chapter describes the hardware of the Micro-reader. It tells you about the mod­ule and how to integrate it.
Topic Page
1.1 General..........................................................................................................6
1.2 Product Description.....................................................................................6
1.2.1 Power Supply.........................................................................................7
1.2.2 Antenna..................................................................................................7
1.2.3 Synchronization......................................................................................7
1.2.4 Trigger Mode..........................................................................................8
1.2.5 Continuous Mode...................................................................................8
1.2.6 Serial Communication ............................................................................8
CHAPTER 1
Product Description
1.3 Connector Pins.............................................................................................9
1.3.1 Pin Connection Description........................................................... ...... .1 0
1.3.2 Module and Antenna Block Diagrams..................................................12
5
1.1 General
The Micro-reader is an intelligent module providing RF and Control functions to read and program TIRIS transponders. It is equipped with a Serial Communications Inter­face (SCI) which may be directly connected to commonly use d system controlle rs. The Micro-reader works together with a 47 µHenry, low-Q antenna, and therefore the system does not need tuning.
Figure 1: Micro-reader Module
1.2 Product Description
The Micro-reader module is a plug-in module which can be plugged into or soldered onto an applicat ion specific adapte r board. It suppor ts serial data com munications between a PC and TIRIS transpo nders. With its Serial Communications Int erface (SCI) the Micro-reader supp orts TTL data com munications, which with the addition of a communications driver (for example: RS232 or RS422) allows communication to a standard interface.
The Micro-reader can be controlled remotel y by either provid ing certain inpu ts with the correspondin g voltage leve l or sending co mmands to the S CI. It can be dri ven either with or without synchronization - the synchronization can be either wireless or wired to enable reli able operation in mu lti-reader envir onments. Two outputs show the reader status and inform th e user about a successf ul comman d execution. The Micro-reader supports all available TIRIS LF transponders.
6
May ’00 Chapter 1. Product Description
1.2.1 Power Supply
There are two separa te 5V supplies to the Micro-reader , one for the output stage (VSP) and the other for the logic (VSL). On power up VSL should rise faster than 0.1 V/ms to ensure a r eliab le operation. The Micro- reader has an on-boa rd res et ci r cuit which will reset it should the supply fall below 4 V (± 0.2 V).
In order to avoid problems with noise conducted via the supply lines, we recommend that if a single supply is used, separate connections from a common de-coupling ca­pacitor are used to feed the Micro-reader.
Note:
The RF Module must not be supplied by Switched Mode Power Sup­plies (SMPS). This is because most SMPS operate at frequencies around 50 kHz. The harmonics of the generated field can interfere with the TIRIS receiver. Therefore only use linear regulated power supplies, or SMPS with a fundamental operating frequency of 200 kHz or higher.
1.2.2 Antenna
The Micro-reader has been designed for use with a 47 µH antenna with a Q of 10 to 20 to generate the exciter frequency of 134.2 kHz. Because of the low Q the system does not need to be tuned.
1.2.3 Synchronization
There are two possible methods of wired synchronization:
1. Connect a pulse waveform to all RDEN- input pins of the Micro-readers to be
2. Connect all SYNC outputs to an 'Or' and then connect this as an input to RDEN-
Wireless synchronization of the Micro-reader is very effective at synchronizing to ad­jacent readers, however problems may occur if the antennas are positioned such that a transponder can be within rang e of two reade rs at the same ti me. In this situ ation one reader could synchronize with the transponder instead of the other reader.
When the WLSC input is active the Micro-reader is in wireless synchronization mode. Wireless synchronization can also be switched on/off by a corresponding command via the serial interface. During execution of this command it has priority over the WLSC input. After the command execution the status of the WLSC input will be con­sidered again.
WARNING:
C
ARE MUST BE TAKEN WHEN HANDLING THE MICRO-READER AS
HIGH
VOLTAGES ACROSS THE ANTENNA PINS COULD BE HARMFUL
YOUR HEALTH
TO
synchronized. The pulse would normally be at VSL, dropping to GND for 100 µs every 200 ms.
of each Micro-reader to be synchronized.
.
7
Note:
It is not recommended to have both wired and wireless synchroniza­tion switched on as synchronization could be unreliable.
We recommend the use of bus drivers for wired synchronization with other Micro-readers and to prevent ESD damage.
Wired or wirele ss syn ch ron iza ti on pr ol o ngs t h e cy cl e ti me by typically 20 ms.
1.2.4 Trigger Mode
When the Micro-reade r is in idle mode it i s possible to trigge r a single charge-o nly read with a power burs t duratio n of 50 ms by taking th e RDEN- pi n to lo gic h igh for 100 µs. The single read will start on the falling edge of the 100 µs pulse.
If a transponder command is sent to th e Micr o-re ade r via the SCI while RDEN- is in a logic high state (waiting position), a falling edge would trigger execution of the com­mand. In waiting position the Micro-reader can only store one command. This means that if two commands were to be sent to the Micro-reader while it is in the waiting po­sition the second command will overwrite the first one.
1.2.5 Continuous Mode
When the CRDM input is active th e Micro-re ader goes i nto continuo us charge-o nly read mode using a power burst duration of 50 ms. The serial data input takes priority over the CRDM input such that if a serial co mmand is received it will be executed regardless of the state of the CRDM input. After the execution of the serial data com­mand the Micro-reader conti nue s with the prev iou s read mode .
In the default continuous read mode, only those valid RO, R/W or MPT IDs that differ from the previously read ID; or valid IDs read after a “NO READ”, are transferred via the SCI (Normal Mode). The Micro-reader can be set to transfer all valid IDs that are read (Line Mode) by means of a corresponding serial data command.
Without synchronizati on the Micr o -rea der has a readi ng frequ enc y of appro ximately 10 readouts per se cond using a power bur st duration of 50 ms . Timing is given in more detail in section 3.2.
1.2.6 Serial Communication
The two serial I/O pins are configured for 9600 Baud, 1 start bit, 8 data bits, no parity and 1 stop bit; they can be connected directly to a communications driver to allow a half duplex communication with a PC via its serial communications interface (for ex­ample: RS232 or RS422).
The communications protocol is specified in Chapter 2.
Handshake
The Micro-reader accepts handshak e commands X (13
) the Micro-reade r stops its current ope ration and stops tran smitting da ta via
hex
the serial port. It stays in idle mode until X the previous mode/command. During this idle period the Micro-reader accepts com­mands via the seri al port, howeve r, it w aits fo r its ex ecuti on unti l X this idle period the Micro-reader can store only one command.
on
. When it receiv es a n X
on/Xoff
(11
) is received when it co ntinues w ith
hex
on
off
is received. In
8
May ’00 Chapter 1. Product Description
Note:
While receiving a command protocol from the serial port X
on/Xoff
is
interpreted a s no rmal da t a wit h ou t a ffecting t h e s eri al co mm u n ic at i on .
1.3 Connector Pins
The Micro-reader module h as 30 pin connecti ons which a re shown in Figure 2 and listed in Table 1.
Figure 2: Micro-reader Pin Connections
Table 1: Pin Connections
Pin Signal Name Function
1 SYNC Output for wired synchronization 2 RDEN- Input for wired synchronization and single read trigger 3 -- Reserved, do not connect 4 RESET- Reset of the Micro-reader 5 RXD Receive Data signal input of serial interface
6 TXD Transmit Data signal output of serial interface 7 -- Reserved, do not connect 8 -- Reserved, do not connect
9 -- Reserved, do not connect 10 -- Reserved, do not connect 11 -- Reserved, do not connect 12 -- Reserved, do not connect 13 -- Reserved, do not connect
9
Micro-reader - Reference Guide May ’00
Table 1: Pin Connections
Pin Signal Name Function
14 -- Reserved, do not connect 15 GND Ground for logic
16 ANT1 Antenna terminal 1 17 ANTCAP Antenna capacitor terminal 18 -- Reserved, do not connect
19 ANT2 Antenna terminal 2
20 21 22 23 24 25 26 27 28 29 30
1.3.1 Pin Connection Description
SYNC (1) Output for wired synchronization. This output is at GND level until
-- Reserved, do not connect
GNDP Ground for output stage
VSP Supply voltage output stage
-- Reserved, do not connect
VSL Supply voltage logic GND Ground for logic CRD Input for continuous read mode WLS Input to swit ch wireless synchronization on
-- Reserved, do not connect
OKT Output to show if a valid ID was read
STAT Output to show status of RF-transmitte r control signal
the Micro-reader starts its read cycle, at which time it goes to VSL until the complete reading, programming or locking cycle is finished.
RDEN- (2) Input for wired synchronization. Taking this pin to VSL acts as a
hold-off for the Micro-reader's output stage preventing it from transmitting until the input returns to GND. The Micro-reader only samples this input at the start of its own reading, programming or locking cycle, this means that if the input goes to VSL after a cycle is started, the cycle is not interrupted. RDEN is a high impedance input and must be tied to GND via a suitable resistor (27 kOhm) when it is not being used.
When the Micro-reader is idle it is possible to trigger a single read by taking the RDEN-pin logic high for 100 ms. The single read will start on the falling edge of the 100 ms pulse.
RESET- (4) Taking this pin to GND holds the Micro-reader in reset. If the reset
pin is not used it can be left disconnected as it is internally pulled up. Minimum pulse duration to perform a reset is 1 ms. After a reset the
10
May ’00 Chapter 1. Product Description
processor takes between 28 ms and 132 ms (typically 72 ms) before it can receive new instructions via the serial communications interface.
RXD (5) Input configured to receive serial data commands at 9600 Baud, 1
start bit, 8 data bits, no parity and 1 stop bit.
TXD (6) Output configured to transmit serial data at 9600 Baud, 1 start bit, 8
data bits, no parity and 1 stop bit. GND (15, 25) Pins 15 and 25 are ground for the logic part. ANT1 (16) Antenna pin for the connection of 47 µH, low Q antennas. ANTCAP (17) It is possible to use antennas of lower inductance by connecting a
suitable capacitor between ANT1 and ANTCAP. This additional
capacitor (ceramic, 100 VDC) will be in parallel with the 30 nf
resonance capacitor on board the Micro-reader (see Figure 4 and
Appendix C). ANT2 (19) Antenna pin (GND) for the connection of 47 µH, low Q antennas. GNDP (21) Pin 21 is ground for the output stage. VSP (22) Pin 22 is for connecting the positive supply voltage (5 V) for the
output stage. VSL (24) Pin 24 is for connecting the positive supply voltage (5 V) for the logic
part. CRDM (26) Supplying pin 26 with a logic high signal causes the Micro-reader to
run in a continuous charge-only read mode (see section 1.2.5
more information).
When the CRDM pin is tied to logic low, the Micro-reader is in an idle
state waiting for commands via the serial interface or for a trigger
signal (RDEN-) to start a single read out cycle. CRDM is a high
impedance input and must be tied to either VSL or GND via a
suitable resistor (27 kOhm). WLSC (27) Pin 27 enables or disables wireless synchronization. To enable the
wireless synchronization, pin 27 must be taken to VSL. When
wireless synchronization is enabled, the Micro-reader will try to
synchronize its transmit signals with any other readers in range. To
disable wireless synchronization pin 27 must be taken to GND. Pin
27 is a high impedance input and must be tied to either VSL or GND
via a suitable resistor (27 kOhm).
Wireless synchronization can also be switched on/off by a
corresponding command via the serial interface. During execution of
this command it has priority over the WLSC input. OKT (29) This output is set to logic high for approx. 60 ms if a valid
transponder was read. It can be connected to an LED externally to
indicate the result of the read cycle.
for
STAT(30) Pin 30 is set to logic low when the RF-transmitter is activated.
Supplying an external LED with this signal makes the status of the
Micro-reader visible.
11
Micro-reader - Reference Guide May ’00
1.3.2 Module and Antenna Block Diagrams
Figure 3: Block Diagram of the Micro-reader
VSL
RESET­CRDM WLSC RDEN-
MICRO
CONTROLLER
SYNC OKT STAT TXD RXD
RXCK RXDT­TXCT-
RFM
ASIC
Filter
VSL
VSP
Power
stage
GND
VSL
VSP GNDP
ANT1
ANT2
ANTCAP
12
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