Eccel Technology RWD SMT Manuel utilisateur

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 C aracteristics ................................................................................................................................6

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

2.2 Absolute aximum Ratings ....................................................................................................................... 6

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

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

3.1 inimum requirements ............................................................................................................................ 7

3.2 Operation of the RWD S T baseboard ...................................................................................................... 7

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

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

Appendix A. Sc ematics 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

Preface

This document describes the performance and other technical characteristics of the RWD-QT S T 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-S T 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 aterials (BO )” – lists the parts used to build the board.

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

1Introduction

1.1 General description

The RWD S T baseboard is a demonstration, evaluation and development board for the RWD-QT-S T 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 EEPRO 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 S T 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 CO port. The RWD S T 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

aximum 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, (E ) H400X/4102,

CRF200/123

Width x Length

116 x 82 mm

Table 1.

1.3 Product overview

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

1.4 Outputs and headers

The RWD S T 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 S T OP3

P3.2 – RWD S T OP2

P3.3 – RWD S T OP1

P3.4 – RWD S T OP0

Note: Square pad is always pin number 1.

2Electrical haracteristics

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

Storage Temperature

+85

°C

DD AX

Supply Voltage

IO AX

Output Pin Current

Table 2.

2.3 Operating onditions

Symbol

Parameter

Min

Max

Unit

Notes

Operating

Temperature

+85

°C

Supply Voltage

4.5

5V via USB bus

AVE

Average Current Consumption 7 30 mA

RWD module + LEDs + USB interface

(current consumption is dependent

upon antenna type)

Table 3.

3Installation 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 S T 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 CO Port) USB

drivers for most common Operating Systems including Windows, AC 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 icrosoft® Windows® environment and

provides configuration and full access to tag memory. For evaluation of the RWD-QT-S T, download and install the

(Win32) RWD-QT Windows application

(http://www.ibtechnology.co.uk/Win32/Win32_QT.ZIP).

for Windows 7, 64-bit Operating Systems, use the new .NET (Win64) RWD-QT Windows version

(http://www.ibtechnology.co.uk/Win32/ icroRWD_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

ake 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 S T 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:

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 TP 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

USB,

PCB antenna mode,

Hitag 2 mode,

Hitag2 Tag in RF field

Green LED (LED2) on

The main window of the MicroRWD Quad Tag software is presented below. The RWD S T baseboard is not

connected to a PC and icroRWD status is: “CO PORT NOT OPEN”.

When the baseboard is properly connected to a PC then the icroRWD status should be: „CONNECTED”. If not, try

clicking “Configure” and then “CO port” to select the valid CO port.

There are 4 main modes: Hitag 1/S, Hitag 2, [E ] H400x/4102 and CRF200/123. 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 “ anual”.

4Application notes

1. An external antenna can be mounted up to 1.5 meters from the RWD S T 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 S T 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 S T 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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