Texas Instruments TIRIS RI-STU-MRD1 User manual

Texas Instruments
Registration
and
Identification
System
Micro-reader
RI-STU-MRD1
Reference Manual
11-06-21-027 25-July-1996

Micro-reader Module 25 July 1996
Edition Notice: Second Edition - July 1996
This is the second edition of this manual, it describes the following equipment:
TIRIS Micro-reader Module RI-STU-MRD1
Texas Instruments reserves the right to change its products or services at any time without
notice. TI provides customer assistance in various technical areas, but does not have full
access to data concerning the uses and applications of customer's products. Therefore TI
assumes no responsibility for customer product design or for infringement of patents and/or
the rights of third parties, which may result from assistance provided by TI.
CE-Declaration
The Micro-reader module complies with the European CE requirements as specified in the EMC
Directive 89/336/EEC. For details please refer to Appendix C of this manual.
The TIRIS logo and the word TIRIS are registered trademarks of Texas Instruments Incorporated.
Copyright 1996 Texas Instruments Incorporated.
All rights reserved.

25 July 1996 Micro-reader Module
Contents
1. Introduction ...........................................................................................................................................................5
1.1 General .............................................................................................................................................................5
1.2 Product Description ..........................................................................................................................................5
1.3 Product Option Coding .....................................................................................................................................5
1.4 Conventions ......................................................................................................................................................5
2. Product Function ....................................................................................................................................................7
2.1 Description .......................................................................................................................................................7
2.1.1 Power Supply ............................................................................................................................................7
2.1.2 Antenna ....................................................................................................................................................7
2.1.3 Synchronization ........................................................................................................................................8
2.1.4 Trigger Mode ............................................................................................................................................8
2.1.5 Continuous Mode ......................................................................................................................................8
2.1.6 Serial Communication ...............................................................................................................................9
2.2 Connector Pins .................................................................................................................................................9
3. Communications Protocol ....................................................................................................................................13
3.1 Protocol PC to Micro-reader ...........................................................................................................................13
3.1.1 Start Mark ...............................................................................................................................................13
3.1.2 Length .....................................................................................................................................................13
3.1.3 Command Field .......................................................................................................................................14
3.1.4 Data Field ...............................................................................................................................................15
3.1.5 BCC ........................................................................................................................................................15
3.2 Protocol Micro-reader to PC ...........................................................................................................................16
3.2.1 Start Mark ...............................................................................................................................................16
3.2.2 Length .....................................................................................................................................................16
3.2.3 Status ......................................................................................................................................................16
3.2.4 Data Field ...............................................................................................................................................17
3.2.5 BCC ............................................................................................................................................................17
4. Specifications .......................................................................................................................................................18
4.1 Absolute Maximum Ratings ............................................................................................................................18
4.2 Recommended Operating Conditions ..............................................................................................................19
4.3 Timings ..........................................................................................................................................................19
4.4 Mechanical Data .............................................................................................................................................20
5. Transponder Protocols .........................................................................................................................................21
5.1 Transponder commands ..................................................................................................................................21
5.1.1 Read RO, R/W .........................................................................................................................................21
5.1.2 Program R/W ..........................................................................................................................................21
5.1.3 Addressing MPTs/SAMPTs .....................................................................................................................22
5.1.3.1 General Read Page of MPT/SAMPT .................................................................................................22
5.1.3.2 Program Page of MPT/SAMPT ........................................................................................................22
5.1.3.3 Lock Page of MPT/SAMPT ..............................................................................................................22
5.1.3.4 Selective Read Page of SAMPT ........................................................................................................23
5.1.3.5 Selective Program Page of SAMPT ..................................................................................................23
5.1.3.6 Selective Lock Page of SAMPT ........................................................................................................23
5.2 Transponder Responses ..................................................................................................................................23
5.2.1 Read Only Transponder ...........................................................................................................................23
5.2.2 Read/Write Transponder .........................................................................................................................24
5.2.3 MPT/SAMPT...........................................................................................................................................24
6. Communication Protocol Examples .....................................................................................................................25
6.1 PC to Micro-reader .........................................................................................................................................25
6.2 Micro-reader to PC .........................................................................................................................................26
Appendix A: Abbreviations .......................................................................................................................................27
Appendix B: Signal Names .......................................................................................................................................28
Appendix C: CE Declaration ....................................................................................................................................28

Micro-reader Module 25 July 1996
Figures
Figure 1: Block Diagram of the Micro-reader ..............................................................................................................6
Figure 2: Antenna Circuit Block Diagram ...................................................................................................................6
Figure 3: Micro-reader Pin Connections .....................................................................................................................9
Figure 4: Top, Front and Side View (measurements in mm) .....................................................................................20
Figure 5: Read function ............................................................................................................................................21
Figure 6: Programming data format of the 64-bit Read/Write Transponder ...............................................................21
Figure 7: Data Format of the General Read Page Function ........................................................................................22
Figure 8: Programming Data Format of the MPT ......................................................................................................22
Figure 9: Lock Page Data Format of the MPT/SAMPT .............................................................................................22
Figure 10: Data Format of the Selective Read Page Function ....................................................................................23
Figure 11: Data Format of the Selective Program Page Function ...............................................................................23
Figure 12: Data format of the Selective Lock Page function ......................................................................................23
Figure 13: RO Read Data Format ..............................................................................................................................23
Figure 14: R/W Read Data Format ............................................................................................................................24
Figure 15: MPT/SAMPT Read Data Format .............................................................................................................24
Tables
Table 1: Pin Connections ..........................................................................................................................................10

25 July 1996 Micro-reader Module
1. Introduction
1.1 General
This document provides information about the TIRIS Micro-reader Module RI-STU-MRD1.
It describes the module and how to integrate it.
1.2 Product Description
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 used system controllers. The Micro-reader works together with a
47 µHenry, low-Q antenna, and therefore the system does not need tuning.
1.3 Product Option Coding
For product and ordering numbers of TIRIS Products and Accessories, please contact your local
TIRIS Application Center.
There is only one version of the Micro-reader Module, that is: RI-STU-MRD1
1.4 Conventions
Certain conventions are used in this document in order to display important information, these
conventions are:
WARNING
A warning is used where care must be taken, or a certain procedure
must be followed, in order to prevent injury or harm to your health.
CAUTION: 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 Module.
Note:Indicates conditions which must be met, or procedures which must be followed, to ensure
proper functioning of the Module.
HINT: Indicates information which makes usage of the Module easier.

Micro-reader Module 25 July 1996
RESET-
CRDM
RDEN-
SYNC
OKT
STAT
TXD
RXD
GND
VSL
GNDP
MICRO
CONTROLLER
RFM
ASIC ANT1
ANT2
ANTCAP
Power
stage
Filter
RXCK
RXDT-
TXCT-
VSL
VSP
VSL
WLSC
VSP
Figure 1: Block Diagram of the Micro-reader
ANT1
ANT2
ANTCAP
TXHI
from
ASIC
TXLO
from
ASIC
VSP
RECEIVE
RESONANCE
CAPACITOR
Figure 2: Antenna Circuit Block Diagram

25 July 1996 Micro-reader Module
2. Product Function
2.1 Description
The Micro-reader module is an intelligent plug-in module which can be plugged into or soldered
onto an application specific adapter board. It supports serial data communications between a PC and
TIRIS transponders. With its Serial Communications Interface (SCI) the Micro-reader supports
TTL data communications, 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
remotely by either providing certain inputs with the corresponding voltage level or sending
commands to the SCI. It can be driven either with or without synchronization - the synchronization
can be either wireless or wired to enable reliable operation in multi-reader environments. Two
outputs show the reader status and inform the user about a successful command execution. The
Micro-reader supports all available TIRIS transponders.
2.1.1 Power Supply
There are two separate 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 reliable
operation. The Micro-reader has an on-board reset circuit 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.
2.1.2 Antenna
The Micro-reader has been designed for use with a 47 µH antenna with a Q of 10 to 20 at 132 kHz
to generate the exciter frequency of 134.2 kHz. Because of the low Q the system does not need to
be tuned.
WARNING
Care must be taken when handling the Micro-reader as high voltages across the antenna pins
could be harmful to your health.

Micro-reader Module 25 July 1996
2.1.3 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 synchronized.
The pulse would normally be at VSL, dropping to GND for 100 µs every 200 ms.
2. ‘Or’ all SYNC outputs together and then connect this as an input to RDEN- of each Micro-
reader to be synchronized.
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
range of two readers at the same time. In this situation 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.
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 wireless synchronization prolongs the cycle time by typically 20 ms.
2.1.4 Trigger Mode
When the Micro-reader is in idle mode it is possible to trigger a single charge-only read with a power
burst duration of 50 ms by taking the RDEN- pin to logic high for 100 µs. The single read will start
on the falling edge of the 100 µs pulse.
If a transponder command is sent to the Micro-reader 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.
2.1.5 Continuous Mode
When the CRDM input is active the Micro-reader goes into continuous charge-only 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 command 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 continues with the previous read mode.

25 July 1996 Micro-reader Module
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 synchronization the Micro-reader has a reading frequency of approximately 10 readouts per
second using a power burst duration of 50 ms.
2.1.6 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 Section 3.
Handshake
The Micro-reader accepts handshake commands Xon/Xoff. When it receives an Xoff (13hex) the
Micro-reader stops its current operation and stops transmitting data via the serial port. It stays in
idle mode until Xon (11hex) is received when it continues with the previous mode/command.During
this idle period the Micro-reader accepts commands via the serial port , however, it waits for its
execution until Xon is received. In this idle period the Micro-reader can store only one command.
Note: While receiving a command protocol from the serial port Xon/Xoff is interpreted as
normal data without affecting the serial communication.
2.2 Connector Pins
The Micro-reader module has 30 pin connections which are shown in figure 3 and listed in table 1.
Figure 3: Micro-reader Pin Connections

Micro-reader Module 25 July 1996
Table 1: Pin Connections
Pin Signal Name Function
1SYNC Output for wired synchronization
2RDEN- Input for wired synchronization and single read trigger
3-- Reserved, do not connect
4RESET- Reset of the Micro-reader
5RXD Receive Data signal input of serial interface
6TXD 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
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 -- Reserved, do not connect
21 GNDP Ground for output stage
22 VSP Supply voltage output stage
23 -- Reserved, do not connect
24 VSL Supply voltage logic
25 GND Ground for logic
26 CRDM Input for continuous read mode
27 WLSC Input to switch wireless synchronization on
28 -- Reserved, do not connect
29 OKT Output to show if a valid ID was read
30 STAT Output to show status of RF-transmitter control signal

25 July 1996 Micro-reader Module
Pin Connection Description
SYNC (1)
Output for wired synchronization. This output is at GND level until 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 pins 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 µs. The single read will start on the falling edge of the 100 µs 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.
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 2).
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.

Micro-reader Module 25 July 1996
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 2.1.5 for 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.
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.

25 July 1996 Micro-reader Module
3. Communications Protocol
3.1 Protocol PC to Micro-reader
Start Length BCC Cmd 1 Cmd 2 Data
Byte Contents (hexadecimal value)
0Start Mark (SOH, 01hex)
1Length
2Command Field (1)
3Command Field (2) (optional)
4(3) Data Field (1)
.
.
N+3(2) Data Field (N)
N+4(3) BCC
Note: The total number of bytes sent within a protocol frame (including Start Mark and
BCC) is limited to 41 bytes.
Examples are given in Section 6.1.
3.1.1 Start Mark
The ‘Start-Mark’ signifies the beginning of a message. It is represented by the ASCII character SOH
(Start Of Header, 01hex).
3.1.2 Length
The ‘Length’ byte indicates the length, in bytes, of the following Command and Data Fields.

Micro-reader Module 25 July 1996
3.1.3 Command Field
The ‘Command Field(s)’ define the mode in which the Micro-reader operates and determines the
operation that is to be carried out in the transponder. Depending on the setting of the relevant bits,
the corresponding information specified in the Data Fields will be sent to the transponder or not.
Thus all functions of each particular transponder type can be executed (see 3.1.4 for further
information).
Command Field (1)
Bit Use Setting Comment
0/1 Mode/Cmd 00 (MSB,LSB) Perform single command
(for example: single read, program, lock)
01 Read in continuous Normal Mode
10 Read in continuous Line Mode
11 Send Micro-reader S/W version
2FBCC calculation 1/0 If set, Micro-reader calculates FBCC
of the MPT protocol
3Power Burst I 1/0 If set, needs to be determined in Data Field
(see 3.1.4)
4Power Pause Duration 1/0 If set, needs to be determined in Data Field
5Power Burst II 1/0 If set, needs to be determined in Data Field
6Data 1/0 If set, needs to be determined in Data Field
7Cmd expansion Field 1/0 If set, Command Field (2) follows
If bit 5 (Power Burst II, for example: for programming and locking) is set, the Micro-reader
automatically operates in single mode. Thus the user is enabled to validate the programming or lock
response before a further cycle is started.
If bit 2 (FBCC calculation) and bit 6 (Data) are set, the Micro-reader automatically calculates a two
byte BCC over the data to be sent to the transponder and adds it to the protocol. When bits 2 and 6
are set the PC must not send the 2 byte FBCC to the Micro-reader.
Bit 4 (Power Pause Duration) is for future use and must not be set when addressing standard TIRIS
transponders.

25 July 1996 Micro-reader Module
Command Field (2)
Command Field (2) is only present if bit 7 of Command Byte 1 is set.
Bit Use Setting Comment
0Special Write Timing 1/0 If set, needs to be determined in Data Field
(see 3.1.4)
1Wireless Synchronization 1/0 If set, wireless synchronization is used
2DBCC calculation 1/0 If set, Micro-reader calculates DBCC
of the R/W and MPT write data
3-7 Reserved
If Command Field (2) is not present, standard TIRIS write timings are used and wireless
synchronization is switched on/off according to the status of input line WLSC.
Note: The settings specified in Command Field (1) and (2) are only valid during the execution of
the current command.
3.1.4 Data Field
The presence of the relevant data field depends on the setting of the bits in the Command Field.
If the relevant bit (for example: Command bit 3 “Power Burst I”) is set to “1”, then Data Field 1 is
present defining the Power Burst length. If the relevant bit in the Command Field is set to “0” the
consequent Data Field is omitted, this results in the following data field being moved forward
(decremented) by one.
Data
Field Use Range (dec) Comment
1Power Burst I1..255 ms If bit 3 of Command Field(1) is set
2Power Pause Duration 1..255 ms If bit 4 of Command Field(1) is set
3Power Burst II 1..255 ms If bit 5 of Command Field(1) is set
4/5 toffLow (LSByte/MSByte) 28..2044 µsIf bit 0 of Command Field(2) is set
6/7 tonLow (LSByte/MSByte) 28..2044 µsIf bit 0 of Command Field(2) is set
8/9 toffHigh (LSByte/MSByte) 28..2044 µsIf bit 0 of Command Field(2) is set
10/11 tonHigh (LSByte/MSByte) 28..2044 µsIf bit 0 of Command Field(2) is set
12 # of Data Fields that follow see * If bit 6 of Command Field(1) is set
13 . . Data Fields LSByte first
*The number of Data Fields must not cause an infringement of the total number of bytes
allowed within a protocol frame.
Transponder command protocols are described in detail in Section 5.1.
3.1.5 BCC
The ‘BCC’ field is a one-byte value of the Longitudinal Redundancy Check calculation (Xor’ed
bytes) for the preceding message. The calculation is performed on the whole message excluding the
Start-Mark.

Micro-reader Module 25 July 1996
3.2 Protocol Micro-reader to PC
Start Length BCCStatus Data
Byte Contents (hexadecimal value)
0Start Mark (SOH, 01hex)
1Length
2Status
3Data Field (1) (LSByte)
.
.
.
N+2 Data Field (N) (MSByte)
N+3 BCC
Refer to Section 6.2 for examples.
3.2.1 Start Mark
The ‘Start-Mark’ signifies the beginning of a message. It is represented by the ASCII character SOH
(Start Of Header: 01hex).
3.2.2 Length
The ‘Length’ byte indicates the length, in bytes, of the following Status and Data Fields.
3.2.3 Status
The ‘Status’ byte provides feedback from the preceding read or program operation.
Status Bits Setting Comment
0,1 00 (MSB,LSB) Transponder type: RO
01 Transponder type: R/W
10 Transponder type: MPT/SAMPT
11 Other
21/0 If set, Startbyte detected
31/0 If set, DBCC O.K.
41/0 If set, FBCC O.K.
51/0 If set, Micro-reader S/W version follows
(all other status bits are reset)
6 - 7 Reserved

25 July 1996 Micro-reader Module
3.2.4 Data Field
Response # of Bytes
Type in Data Field Comment
RO 8Identification Data (LSByte first), see 5.2.1
R/W 8Identification Data (LSByte first) ), see 5.2.2
MPT/SAMPT 9Identification Data (LSByte first), plus Read Address, see 5.2.3
Other 14 Complete transponder protocol without pre-bits provided that
a valid RO or R/W start byte was detected
No read 0No Data Fields, not even transponder start byte was detected,
status 03hex
S/W version 1For example: 15hex means S/W version 1.5
Section 5.2 provides an overview of the response telegrams of the current TIRIS transponder types.
3.2.5 BCC
The ‘BCC’ field is a one-byte value of the Longitudinal Redundancy Check calculation (Xor’ed
bytes) for the preceding message. The calculation is performed on the whole message excluding the
Start-Mark.

Micro-reader Module 25 July 1996
4. Specifications
4.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)
Supply voltage for power stage V_VSP 6.0 V
Supply voltage for logic V_VSL 6.0 V
Voltage on any pin (except ANT1) Vpin -0.6 V to V_VSL + 0.6 V
Maximum output current sunk by an output pin I_su 22 mA
Maximum output current sourced by an output pin I_so 22 mA
Antenna quality factor Q_Ant 25
Operating free-air temperature range T_oper -25 to +70 oC
Storage temperature range T_store -40 to +85 oC
CAUTION: Exceeding absolute maximum ratings may lead to permanent damage to the
Module. Exposure to absolute-maximum-rated conditions for extended periods
may affect device reliability.
Note: Free-air temperature: air temperature immediately surrounding the Module. If the
module is incorporated into a housing, it must be guaranteed by proper design or cooling
that the internal temperature does not exceed the absolute maximum ratings.

25 July 1996 Micro-reader Module
4.2 Recommended Operating Conditions
Symbol Parameter Min. Typ. Max. Unit
V_VSP Supply voltage for power stage 4.5 5.0 5.5 V
V_VSL Supply voltage for logic 4.5 5.0 5.5 V
I_VSP Supply current for power stage 110*1mA
I_VSL Supply current for logic 30*2mA
I_su Output current sunk by an output pin 5.0 15.0 mA
I_so Output current sourced by an output pin 5.0 15.0 mA
I_sutot Output current sunk by all output pins 20.0 60.0 mA
I_sotot Output current sourced by all output pins 20.0 60.0 mA
V_ret VSP start voltage to guarantee power on
reset GND
Vrise_ret VSP rise rate to guarantee power on reset 0.1 V/ms
I_idle Supply current with Micro-reader idle 5.0 mA
I_act Supply current with Micro-reader active 100*3mA
ViH Input high voltage 0.8 VSL VSL
ViL Input low voltage GND 0.2 VSL
VoH Output high voltage VSL - 0.7 VSL
VoL Output low voltage GND 0.6 V
Q_Ant Antenna quality factor 10 15 20
L_Ant Antenna inductance value 46.1 47.0 47.9 µH
*1Typical supply current (peak value) for the power stage when the RF transmitter is
switched on (L = 47µH, Q = 12).
*2Typical supply current for logic when the RF transmitter is switched on.
*3Typical supply current (average value) of the Micro-reader when the RF transmitter is
switched on (L = 47µH, Q = 12).
4.3 Timings
Parameter Typical Maximum Unit
Read Cycle time without synch (no read) 100 105 ms
Read Cycle time with synch (no read) 120 175 ms
Read Cycle time without synch (valid read) 170 175 ms
Read Cycle time with synch (valid read) 190 245 ms
Interbyte time-out for serial communication 10*1ms
*1If an Interbyte time-out occurs the Micro-reader performs a reset.

Micro-reader Module 25 July 1996
4.4 Mechanical Data
Parameter Minimum Typical Maximum Unit
Length 37.9 38.3 38.7 mm
Width 28.8 29.3 29.6 mm
Height including pins 12.5 13.5 14.0 mm
Weight 5.0 Grams
Recommended finished pin hole size is 1 mm diameter.
Figure 4: Top, Front and Side View (measurements in mm)