Eccel Technology RWD SMT User Manual

1

RWD SMT Baseboard User Manual

v1.1

Table of contents

Preface .................................................................................................................................................................2

1 Introduction ..................................................................................................................................................3

1.1 General description ................................................................................................................................... 3

1.2 Features .................................................................................................................................................... 3

1.3 Product overview ...................................................................................................................................... 4

1.4 Outputs and headers ................................................................................................................................. 5

2 Electrical Characteristics ................................................................................................................................6

2.1 Test conditions .......................................................................................................................................... 6

2.2 Absolute Maximum Ratings ....................................................................................................................... 6

2.3 Operating Conditions ................................................................................................................................ 6

3 Installation and operation ..............................................................................................................................7

3.1 Minimum requirements ............................................................................................................................ 7

3.2 Operation of the RWD SMT baseboard ...................................................................................................... 7

3.3 Getting started .......................................................................................................................................... 7

4 Application notes ........................................................................................................................................ 10

Appendix A. Schematics and Layouts ................................................................................................................... 12

1. Schematic ................................................................................................................................................ 12

2. Top cooper .............................................................................................................................................. 13

4. Top cooper and silk ................................................................................................................................. 14

5. Bottom cooper ........................................................................................................................................ 15

Appendix B. Bill of materials (BOM) .................................................................................................................... 16

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Preface

This document describes the performance and other technical characteristics of the RWD-QT SMT baseboard. The
content is as follows:

Chapter 1. Introduction – an overview of the board and a description of its operation.

Chapter 2. Electrical characteristics – describes the electrical characteristics of the RWD-QT-SMT baseboard.

Chapter 3. Installation and operation – describes how to configure and get started using the RWD baseboard.

Chapter 4. Application notes – additional useful information.

Appendix A. “Schematics and Layouts” – the schematic and layout diagrams of the board.

Appendix B. “Bill of Materials (BOM)” – lists the parts used to build the board.

ECCEL Technology provides online support via our website at www.eccel.co.uk and e-mail [e-mail].

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1 Introduction

1.1 General description

The RWD SMT baseboard is a demonstration, evaluation and development board for the RWD-QT-SMT module.
It is a complete reader and tag acceptance solution for passive RF transponders. The solution only needs a 5V DC
supply to be a fully featured read/write system. The RWD module provides internal EEPROM memory for holding a
list of authorised identity codes and system configuration parameters, a manual override switch facility and has LED
drives to give visual indication of acceptance. The RWD also has a serial UART interface that allows a host system to
communicate it as the user requires, so that system features can be customised, configurations changed and tag
read/write data handled by a host system.

The RWD SMT Baseboard allows the user to communicate through a USB interface to a PC. The board can be
connected to the USB port of a PC with a FTDI VCP (Virtual Com Port) driver installed, allowing the Windows
applications to communicate with the reader module via the allocated COM port. The RWD SMT Baseboard uses the
FTDI (Future Technology Devices International Ltd) FT234XD serial-to-USB converter chip. The appropriate VCP USB
driver should be downloaded and installed form: http://www.ftdichip.com/Drivers/VCP.htm.

1.2 Features

Parameter Typical Value

Range (dependent on antenna dimensions and tuning, tag: Hitag 2 ISO card)

a) PCB antenna
b) External antenna (coil 1,5 cm)
c) External antenna (coil 7 cm)

up to 9 cm
up to 5 cm

up to 9 cm
Nominal RF frequency 125 kHz
Maximum data rate (between Tag and RWD) 4k baud
Communication time for Tag authentication Less than 100 ms (Hitag 2)
Auxiliary output drive current up to 25 mA
Switch input (pulled up) active low

Serial interface

TTL level serial (9600 baud, 8-bits,

1-stop, no-parity, Tx, Rx and CTS)

Supported tags

Hitag 1/

S, Hitag 2, (EM) H400X/4102,

MCRF200/123
Width x Length

116 x 82 mm

Table 1.

4

1.3 Product overview

Note: Mounting hole spacing: 109 x 75 mm. Hole size is 3.2 mm.

5

1.4 Outputs and headers

The RWD SMT baseboard has link options to allow selection between the on-board 125 kHz PCB antenna or the
external 125 kHz antenna coil. The P1 UART connector allows the user a simple connection to an embedded system
for evaluation and prototyping. The P3 connector allows the user to connect 4 outputs to the board. Each of them
can support a maximum of 25mA.

P2. Antenna selection header – external antenna

P2. Antenna selection header – PCB Antenna

J2 – external antenna socket

P1 – UART connector
P1.1 – RX
P1.2 – GND
P1.3 – CTS
P1.4 – TX
P1.5 – GND
P1.6 – +5V

P3 – Outputs
P3.1 – RWD SMT OP3
P3.2 – RWD SMT OP2
P3.3 – RWD SMT OP1
P3.4 – RWD SMT OP0

Note: Square pad is always pin number 1.

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2 Electrical Characteristics

2.1 Test conditions

Typical device parameters have been measured at ambient temperature 22°C ± 3°C and using a power supply of
5V ± 10%.

2.2 Absolute Maximum Ratings

Symbol

Parameter

Min Max Unit Notes

TS

Storage Temperature

-40 +85 °C

V

DDMAX

Supply Voltage

- 5.5 V

I

IOMAX

Output Pin Current

- 25 mA

Table 2.

2.3 Operating Conditions

Symbol

Parameter

Min Max Unit Notes

TO

Operating

Temperature

-40 +85 °C

VDD

Supply Voltage

4.5 5.5 V 5V via USB bus

I

AVE

Average Current Consumption 7 30 mA

RWD module + LEDs + USB interface
(current consumption is dependent
upon antenna type)

Table 3.

7

3 Installation and operation

3.1 Minimum requirements

For USB connectivity, the minimal physical requirement for the PC is a standard USB 2.0 port. The board
connects to the PC via the micro-USB connector (J1). It is recommended to connect the board to the PC through a
self-powered USB hub.

3.2 Operation of the RWD SMT baseboard

Before the RWD SMT baseboard can communicate with a PC over USB, a few steps must be performed. The
board uses the FTDI FT234XD Full Speed USB to Basic UART converter chip. FTDI provide VCP (Virtual COM Port) USB
drivers for most common Operating Systems including Windows, MAC and Linux. The appropriate VCP USB driver
should be downloaded and installed from: http://www.ftdichip.com/Drivers/VCP.htm.
Further information about the FT234XD chip: http://www.ftdichip.com/Products/ICs/FT234XD.html.
ECCEL Technology provide Windows applications and Debug utilities that allow all the features of the RWD module
and the card/tag type to be easily evaluated. The MicroRWD Quad Tag is a graphical user interface for management
of the RWD baseboard. The application is designed to be used in the Microsoft® Windows® environment and
provides configuration and full access to tag memory. For evaluation of the RWD-QT-SMT, download and install the
(Win32) RWD-QT Windows application
(http://www.ibtechnology.co.uk/Win32/Win32_QT.ZIP).
or
for Windows 7, 64-bit Operating Systems, use the new .NET (Win64) RWD-QT Windows version
(http://www.ibtechnology.co.uk/Win32/MicroRWD_QuadTag-REL-1_0.zip ).
Download the .ZIP compressed file, un-zip and run SETUP.exe to install in the usual manner.

3.3 Getting started

Make sure that the RWD module is properly fitted (see image in section 1.3). Check that the jumpers on the P2
connector are properly set up. It depends upon antenna type – there is one setting for the use of a PCB antenna and
another for the use of an external antenna (see section 1.4).

To start using the RWD SMT baseboard, simply connect it to a PC via the micro-USB cable. When power (5V
DC) is first applied to the RWD, the red and green LEDs flash once to indicate successful power-up. The device can
also check for a broken or shorted antenna and can even detect very badly tuned antennas, these problems are
indicated by the red LED flashing continuously until the fault has been rectified. The RWD will normally have the red
LED lit until a valid card or tag is brought into the RF field. If the tag is accepted as valid then the green LED is lit and
the output drivers (OP0, OP1, OP2, OP3) are switched on. The working baseboard is shown below:

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By default the green LED (LED3) lights when the board is powered but it can pulses when transmitting or receiving
data via USB. The Functionality of LED3 can be configured in the internal MTP memory using the software utility
FT_PROG which can be downloaded from the FTDI Utilities (www.ftdichip.com).

Power supply from USB,
PCB antenna mode,
Hitag 2 mode,
no tag in RF field,
Red LED (LED1) on

Power supply

from USB,

PCB antenna mode,
Hitag 2 mode,
Hitag2 Tag in RF field
Green LED (LED2) on

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The main window of the MicroRWD Quad Tag software is presented below. The RWD SMT baseboard is not
connected to a PC and MicroRWD status is: “COM PORT NOT OPEN”.

When the baseboard is properly connected to a PC then the MicroRWD status should be: „CONNECTED”. If not, try
clicking “Configure” and then “COM port” to select the valid COM port.

There are 4 main modes: Hitag 1/S, Hitag 2, [EM] H400x/4102 and MCRF200/123. Clicking the appropriate image
allows the user to read/write a tag and check tag or RWD status. For further information on the RWD modules click
“Help” and then chose “Manual”.

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4 Application notes

1. An external antenna can be mounted up to 1.5 meters from the RWD SMT baseboard. Screened twisted pair
cable should be used with the screen connected to GND. The RWD Baseboard with external antenna coil is
shown below. This and other external antennas are available on our website: www.eccel.co.uk.

2. External antenna must not be exposed to high voltage ESD sources.

3. If OP0, OP1, OP2 or OP3 output signals are connected off the main system PCB then 1K (minimum) series
resistors should be used to protect the RWD SMT from external voltage spikes. Likewise, if the switch
override input is taken off the PCB then a series resistor must be used to protect the input.

4. The system will only perform well if the 5V supply is stabilised and noise free. It should be capable of
sourcing the maximum current with a good safety margin.

5. We recommend to mount the RWD QT SMT in one of two ways. First is to solder it right to the Baseboard
PCB. The second is to use 8-pin headers (see images below). Example headers: female – NINIGI Zl262-8SG,
male – CONNFLY ZL201-08G.

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The

RWD

QT SMT

soldered right to the
Baseboard PCB

The RWD QT SMT
mounted with 2x pin
headers and 2x female
headers.

The RWD QT SMT with

soldered male pin header
CONNFLY ZL201-08SG

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Appendix A. Schematics and Layouts

1. Schematic

13

2. Top cooper

The Gerber PCB layout files for this board are available free-of-charge on request. If interested please contact us
via e-mail [e-mail].

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4. Top cooper and silk

15

5.

Bottom cooper

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Appendix B. Bill of materials (BOM)

The Universal Socket Board has been designed with thorough attention to noise suppression and filtering of
the 5-volt supply (see circuit schematics above). In simple applications many of these precautions can be omitted.
The Bill-of-Materials list below shows the typical parts-list with Manufacturer part-numbers, in most cases equivalent
components can be used accordingly.

Quantity Designator Comment Manufacturer Manufacturer P/N

3 C1, C3, C12 Capacitor 10nF X7R 50V 10%, SMD 0402 KEMET C0402C103K5RACTU

1 C2 Capacitor 100nF X5R 50V 10% SMD 0402

MURATA

GRM155R61H104KE19D

2 C4, C5 Capacitor 47pF C0G 50V 10% SMD 0402 KEMET C0402C470K5GACTU

2 C6, C9

Capacitor tantalum 47u 1

0V 10%, Case B

KEMET

T491B476K010AT

2 C7, C8 Capacitor 100pF C0G 50V 10% SMD 0402 KEMET C0402C101K5GACTU

2 C10, C11

Capacitor 47pF C0G 100V 10% SMD 0805

KEMET

C0805C470J1GACTU

2 FB1, FB2 Ferrite Bead 300ohm WURTH ELEKTRONIK 742792641

1 J1 Conn. USB mic

ro-B, Female

MOLEX

47346-0001

1 LED1 Diode LED RED, SMD 0603 OPTOSUPPLY OSR50603C1E

2 LED2, LED3 Diode LED GREEN, SMD 0603 OPTOSUPPLY OSG50603C1E

2 P1, P2 Conn. Header

-

2.54, Male, 1x6, Gold

CONNFLY

ZL201-06G

1 P3 Conn. Header-2.54, Male, 1x4, Gold CONNFLY ZL201-04G

2 Q1, Q2

Transistor QNPN, SOT

-23

NXP BC817

-

25.215

7 R1, R2, R3, R5, R6, R9, R20 Resistor 10k 1% SMD 0402 VISHAY CRCW040210K0FKTDBC

3 R4, R7, R8

Resistor 15k 1% SMD 0402

VISHAY

CRCW040215K0FKTDBC

2 R10, R11 Resistor 27R 1% SMD 0402 VISHAY CRCW040227R0FKTDBC

1 R12 Resistor 4k7 1% SMD 0402

VISHAY

CRCW04024K70FKTDBC

2 R13, R19 Resistor 22k 1% SMD 0402 VISHAY CRCW040222K0FKTDBC

4 R14, R15, R16, R17 Resistor 4k7 1% SMD 0805 VISHAY CRCW08054K70FKEA

1 R18 Resistor 33R 1% SMD 0805

VISHAY

CRCW0

80533R0FKEA

1 SW1 Microswitch SPST-NO, TACT-67N-F NINGI TACT-67N-F

1 U1 USB Interface IC FT234XD

FTDI FT234XD

1 U2 RWD SMT ECCEL Technology Ltd RWD SMT QT V1

No responsibility is taken for the method of integration or final use of RWD SMT

More information on the RWD SMT and other products can be found at the Internet web site:

http://www.eccel.co.uk

or alternatively contact ECCEL Technology (IB Technology) by email at:

[e-mail]