EX II Serial Controllers Reference Guide EX II 1710SC EX II 1720SC EX II 1750SC EX II 7720SC 3M Touch Systems Read and understand all safety information contained in this document before using this product. 3M Touch Systems Proprietary Information 2 EX II Serial Controllers Reference Guide The information in this document is subject to change without notice. No part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express written permission of 3M Touch Systems, Inc. 3M may have patents or pending patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. The furnishing of this document does not give you license to these patents, trademarks, copyrights, or other intellectual property except as expressly provided in any written license agreement from 3M Touch Systems, Inc. The information provided in this document is intended as a guide only. For the latest detailed engineering specifications, please contact your 3M Touch Systems, Inc. Application Engineer. 3M Touch Systems, Inc., Inc is committed to continually improving product designs, as a result, product specifications may be subject to change without notification. "RoHS Directive compliant" means that the product or part does not contain any of the following substances in excess of the following maximum concentration values in any homogeneous material, unless the substance is in an application that is exempt under RoHS: (a) 0.1% (by weight) for lead, mercury, hexavalent chromium, polybrominated biphenyls or polybrominated diphenyl ethers; or (b) 0.01% (by weight) for cadmium. Unless otherwise stated by 3M in writing, this information represents 3M's knowledge and belief based on information provided by third party suppliers to 3M. NOTICE: Given the variety of factors that can affect the use and performance of a 3M Touch Systems, Inc. Product (the "Product"), including that solid state equipment has operation characteristics different from electromechanical equipment, some of which factors are uniquely within User's knowledge and control, it is essential that User evaluate the 3M Touch Systems, Inc. Product and software to determine whether it is suitable for User's particular purpose and suitable for User's method of application. 3M Touch Systems, Inc. statements, engineering/technical information, and recommendations are provided for User's convenience, but their accuracy or completeness is not warranted. 3M Touch Systems, Inc. products and software are not specifically designed for use in medical devices as defined by United States federal law. 3M Touch Systems, Inc. products and software should not be used in such applications without 3M Touch Systems, Inc. express written consent. User should contact its sales representative if User's opportunity involves a medical device application. IMPORTANT NOTICE TO PURCHASER: Specifications are subject to change without notice. These 3M Touch Systems, Inc. Products and software are warranted to meet their published specifications from the date of shipment and for the period stated in the specification. 3M Touch Systems, Inc. makes no additional warranties, express or implied, including but not limited to any implied warranties of merchantability or fitness for a particular purpose. User is responsible for determining whether the 3M Touch Systems, Inc. Products and software are fit for User's particular purpose and suitable for its method of production, including intellectual property liability for User's application. If the Product, software or software media is proven not to have met 3M Touch Systems, Inc. warranty, then 3M Touch Systems, Inc. sole obligation and User's and Purchaser's exclusive remedy, will be, at 3M Touch Systems, Inc. option, to repair or replace that Product quantity or software media or to refund its purchase price. 3M Touch Systems, Inc. has no obligation under 3M Touch Systems, Inc. warranty for any Product, software or software media that has been modified or damaged through misuse, accident, neglect, or subsequent manufacturing operations or assemblies by anyone other than 3M Touch Systems, Inc. 3M Touch Systems, Inc. shall not be liable in any action against it in any way related to the Products or software for any loss or damages, whether non-specified direct, indirect, special, incidental or consequential (including downtime, loss of profits or goodwill) regardless of the legal theory asserted. (c) 2001-2005 3M All rights reserved. Printed in the United States Document Title: EX II Serial Controllers Reference Guide Document Number: 29087, Version 01 MicroTouch, the MicroTouch logo, and ClearTek are either registered trademarks or trademarks of 3M in the United States and/or other countries. Windows and/or other Microsoft products referenced herein are either registered trademarks or trademarks of Microsoft Corporation in the U.S. and/or other countries. 3M Touch Systems Proprietary Information Contents Chapter 1 Introduction What You Need to Know ...........................................................................................5 Important Safety Information .....................................................................................5 Touch Screen Care and Cleaning ...............................................................................6 Contacting Technical Support ....................................................................................7 3M Touch Systems, Inc. Worldwide Offices .............................................................7 Chapter 2 Integrating the EX II Controllers Overview of the EX II Touch Screen Controllers ......................................................9 EX II 17xxSC Dimensions .......................................................................................10 EX II 7720SC Dimensions .......................................................................................10 Handling and ESD Protection ..................................................................................11 Establishing the Data Connection ............................................................................11 Mounting the Controller...........................................................................................12 Supplying Power to the Controller...........................................................................12 Mounting the Touch Screen .....................................................................................13 Turning On Your System .........................................................................................13 Status Light (LED) Diagnostics ...............................................................................14 Installing Software ...................................................................................................15 Chapter 3 EX II Controller Communications Controller Default Settings.......................................................................................17 Communicating with the Controller.........................................................................18 Firmware Commands ...............................................................................................20 Calibrate Extended ...................................................................................................21 Calibrate Raw ...........................................................................................................23 Diagnostic Command ...............................................................................................24 Format Raw ..............................................................................................................25 Format Tablet ...........................................................................................................26 Mode Stream ............................................................................................................27 Name Command.......................................................................................................27 Null Command .........................................................................................................28 Output Identity .........................................................................................................28 3M Touch Systems Proprietary Information 4 EX II Serial Controllers Reference Guide Parameter Set............................................................................................................28 Reset .........................................................................................................................29 Restore Defaults .......................................................................................................30 Unit Type Verify ......................................................................................................30 Appendix A EX II 17xxSC Controller Specifications Technical Specifications...........................................................................................34 Physical Dimensions ................................................................................................34 Female Connector on the Touch Screen Cable ........................................................36 Communication Connector.......................................................................................36 Appendix B EX II 7720SC Controller Specifications Touch Screen Cable Connections.............................................................................38 Communication Connector.......................................................................................38 Technical Specifications...........................................................................................39 Physical Dimensions ................................................................................................39 3M Touch Systems Proprietary Information CHAPTER 1 Introduction 3M Touch Systems offers several advanced controllers designed for reliability and easy installation. Each controller provides superior performance and delivers excellent stability, sensitivity, accuracy, and fast response. This reference manual, directed to developers of touch screen systems, provides installation and configuration information for the 3M Touch Systems EX II serial capacitive touch screen controller. This document includes information on integrating the EX II controller into your design, communicating with the controller, installing the TouchWare or MT 7 software user interface, and troubleshooting setup problems. It also includes a complete description of the firmware commands, a guide to interpreting status LED conditions, and controller specifications. 3M Touch Systems is committed to being a premier supplier in touch systems throughout the world. As a 3M Touch Systems customer, you are aware that we have strong internal programs that meet or exceed environmental regulations of our customers and the regions in which we conduct business. As such, our approach to the European Union Directives 2002/96/EC (WEEE) and 2002/95/EC (RoHS) (the directives) is being addressed in the same rigorous manner. To ensure compliance with the directives, we are pleased to provide this RoHS compliant product. What You Need to Know This document assumes you are familiar with firmware commands and how to use them. Executing some commands may alter the performance of your touch product. You should be aware of the results of using these commands before executing them. Important Safety Information Read and understand all safety information before using this product. Follow all instructions marked on the product and described in this document. Pay close attention to the following installation warnings and safety precautions. 3M Touch Systems Proprietary Information 6 EX II Serial Controllers Reference Guide Intended Use The EX II controller was designed to enable touch in conjunction with other 3M Touch Systems products and was tested to replace an existing serial controller. This controller is intended for internal use only and is not designed for use in hazardous locations. DANGER To avoid the risk of fire and/or explosion which will result in serious injury or death: * Do not install or use this product in a hazardous location. WARNING To avoid the risk of electric shock which could result in serious injury or death: * * Do not use a damaged power supply. Do not use a power cord that is frayed or otherwise damaged. WARNING To avoid the risk of fire and/or explosion which could result in serious injury or property damage: * Do not install or use this product in a hazardous location. * Do not use this product in any outdoor environment unless NEMA (or other similar) standards, such as IP rating, are followed. CAUTION To reduce the risks associated with improper disposal, which if not avoided may result in minor or moderate injury from ground water contamination: * Dispose of components in accordance with local, state, and federal regulations. To avoid the potentially hazardous situations associated with the use of isopropyl alcohol which may result in minor or moderate injury or property damage: * Follow all instructions and recommendations in the manufacturer's Material Safety Data Sheet and product label. Explanation of Symbols Attention: Read accompanying documentation Touch Screen Care and Cleaning The touch screen requires very little maintenance. 3M Touch Systems, Inc. recommends that you periodically clean the glass touch screen surface. Typically, an isopropyl alcohol and water solution ratio of 50:50 is the best cleaning agent for your touch screen. You can also use straight isopropyl alcohol. In addition, 3M Screen and Keyboard Cleaner CL680 has been tested and approved for this use. CAUTION 3M Touch Systems Proprietary Information Introduction 7 To avoid the potentially hazardous situations associated with the use of alcohol or other solvents which may result in minor or moderate injury or property damage: * Follow all instructions and recommendations in the manufacturer's Material Safety Data Sheet and product label. * Be sure to follow solvent manufacturer's precautions and directions for use when using any solvents * It is important to avoid using any caustic chemicals on the touch screen. Do not use any vinegar-based solutions. Apply the cleaner with a soft, lint-free cloth. Avoid using gritty cloths. Always dampen the cloth and then clean the screen. Be sure to spray the cleaning liquid onto the cloth, not the screen, so that drips do not seep inside the display or stain the bezel. Always handle the touch screen with care. Do not pull or stress cables. Contacting Technical Support 3M Touch Systems, Inc. is committed to helping you get the most out of your touch screen by providing extensive Technical Support. Visit the 3M Touch Systems, Inc. website at http://www.3Mtouch.com/, where you can download touch screen software and drivers, obtain regularly updated technical documentation on 3M Touch Systems, Inc. products, and learn more about our company. Whenever you contact Technical Support, please provide the following information: * * * * * Display manufacturer and model number Touch screen part number and serial number Current driver version Operating system used Information on additional peripherals Technical Support is available Monday through Friday 8 a.m. to 8 p.m. US Eastern Standard Time - 9 a.m. to 5 p.m. throughout Europe. Limited call back service is available Saturdays and Sundays 9 a.m. to 5 p.m. You can contact 3M Touch Systems, Inc. Technical Support (US only -- Eastern Standard Time) by calling the hot line, sending email or a fax. * * * * Technical Support Hot Line: 978-659-9200 Technical Support Fax: 978-659-9400 Toll Free: 1-866-407-6666 Email: US-TS-techsupport@mmm.com 3M Touch Systems, Inc. Worldwide Offices Contact information for all offices can be accessed through the website: http://www.3Mtouch.com/. 3M Touch Systems Proprietary Information CHAPTER 2 Integrating the EX II Controllers The 3M Touch Systems EX II controller provides a drop-in replacement for an existing controller with wide dynamic range, increased noise immunity, wide operating temperature stability, reprogrammability using software utilities and improved capability in ungrounded environments. The EX II 1700SC and 7720SC series capacitive controller firmware is optimized for Cleartek II touch screens integrated in the latest flat panel displays. This chapter covers the following EX II controller specifications: * * * * Cable connections Mounting requirements Power requirements and options Status LED codes Overview of the EX II Touch Screen Controllers The EX II controllers and touch screens are supplied separately. A 25-point linearization procedure has been performed to determine the physical properties of the touch screen, and the data is stored in a 2D bar code label attached to the touch screen flex cable. * * * The EX II 1710SC and 1750SC are available in N81 Format Tablet either cased or uncased for external or internal mounting. The EX II 1720SC is available in N72 Format Tablet either cased or uncased for external or internal mounting. The EX II 7720SC is available in N81 Format Tablet uncased without cable for mounting within a custom chassis. To integrate and test the EX II controller, you need the following items: * A 3M Touch Systems capacitive touch screen. The touch screens are available in a variety of sizes. 3M Touch Systems Proprietary Information 10 EX II Serial Controllers Reference Guide * A method of establishing the serial data communication between the controller and your system. The standard 3M Touch Systems RS-232 serial cable (P/N 7310101) is recommended. * A method of supplying power to the controller -- either internal or external. * A touch screen driver with a calibration routine. Note: You can use either TouchWare or MT 7 software, which include the touch screen device driver and utilities software as the software interface. EX II 17xxSC Dimensions The EX II 17xxSC cased version measures 2.5 x 3.75 inches with a total height of approximately 1 inch when the touch screen cable is attached. The cased version comes with a standard serial cable. The EX II 17xxSC uncased version measures 2.25 x 3.6 inches with a total height profile of 0.5 inches from the thru hole pins on the trace side of the board to the top of the highest component on the opposite side. The EX II 17xxSC has a NOVRAM touch screen connector and a serial cable connector. Figure 1. EX II 17xxSC Overall Dimensions EX II 7720SC Dimensions The EX II 7720SC controller measures 1.3 x 2.6 inches with a total height profile of 0.38 inches from the thru hole pins on the trace side of the board to the top of the highest component on the opposite side. The EX II 7720SC has a 5-pin touch screen connector and a serial cable connector. 3M Touch Systems Proprietary Information Integrating the EX II Controllers 11 Figure 2. EX II 7720SC Overall Dimensions Handling and ESD Protection When mounting the touch screen and controller, use normal precautions for handling electrostatic sensitive devices. The EX II controllers have internal protection to 27 kV for ESD discharges to the touch screen (not to the controller directly) that may occur during normal operation of the touch screen. Refer to Appendix A for further specifications. Establishing the Data Connection The EX II controllers require that an RS-232 serial communication cable be attached to connector JP1. You can use a standard 3M Touch Systems RS-232 cable (P/N 7310101) or an equivalent interconnect. One end of this cable plugs into the RS-232 connector (JP1) on the controller. The other end, which has a 9-pin D connector, plugs directly into a serial COM port on your PC. Table 1 describes the interconnections for the 3M Touch Systems RS-232 cable. 3M Touch Systems Proprietary Information 12 EX II Serial Controllers Reference Guide Table 1 COM Cable for EX II 17xxSC and 77xxSC Controller PC Side (9-Pin D) Wire Controller Side (7-Pin Molex) Pin RS-232 Assigned Jumpered to: Color Pin 1 Data Carrier Detect (DCD) Receive Data (RXD) Transmit Data (TXD) Data Terminal Ready (DTR) Signal Ground Data Set Ready (DSR) Request to Send (RTS) Clear to Send (CTS) Not Used 4 and 6 DTR and DSR None 1 and 6 DCD and DSR Brown Red 2 Transmit Data (TXD) 3 Receive Data (RXD) None Blue Black Green 5 Power supply ground None 1 Request to Send (RTS) 4 Clear to Send (CTS) Do not ground 6 DC power jack (+5 VDC) 7 Cable shield connected to ground. DC power jack ground 7 Chassis (earth) ground 2 3 4 5 6 7 8 9 Sleeve Pin 1 and 4 DCD and DTR White Shell Description Mounting the Controller The uncased controller is mounted internally. Choose a convenient spot away from highvoltage, high power cables and electronics. Use 4-40 metal screws to mount the controller using the two diagonal mounting holes in the board. The controller is mounted in line with the touch screen cable exit point to minimize cable flexing. The controller is mounted behind or on the side of the display on stand offs to allow room for the touch screen cable connector. Refer to Figure 1 for more details on controller mounting. Supplying Power to the Controller You must supply the EX II controller with power. You can use internal power (that is, tap power from inside the monitor or PC) or external power. However you supply power, the source must deliver 85 mA typical (110 mA maximum), with a maximum ripple and noise of 50mV peak-to-peak. CAUTION To avoid possible damage to the controller, you must provide a path for electrostatic discharge. The controller-mounting hole near the touch screen connector should be used to connect to chassis safety ground and must be attached by the shortest possible route to a good earth return (chassis) in all applications. You can supply power to the ClearTek II controller using any of the following methods. The voltage input can vary from +5VDC to +12VDC. Exact specifications can be found in the appendices. 3M Touch Systems Proprietary Information Integrating the EX II Controllers * * * 13 (EX II 7720SC only) Internal power +5V to +12 V DC though the 2-pin power input connector pin 2 (+5V to 12 V) and pin 1 (RTN). A square pin indicator on the bottom of the board marks pin 1. Internal power (+5V to +12V DC) through a custom serial cable configuration. External power (+5 V DC) from a wall-mount power supply. Note: To avoid possible damage to one or both of the power supplies, do not supply both internal power and external power to the controller. Power from two sources could cause damage. Using an Internal Power Supply (+5V to +12V) to JP3 Provide power directly to the controller using JP3 (Molex 22-05-3021). Use a mating 2pin connector and connect Pin 2 to power (between +5V and +12V) and Pin 1 to the return. (Mating connector is the Molex housing 22-01-3027 with 08-50-0114 contacts). Using a Custom Serial Cable Design When creating a custom serial cable connection, you can provide power to the controller through the mating Molex connector: (refer to Table 12 for more information on actual cable connections). 1. Obtain a 7-pin Molex connector 51004-0700. 2. Attach power and ground to the connector, (Pin 6: +5V to +12V, Pin 7: Ground). Using an External Wall-Mount Power Supply If you are using a standard 3M Touch Systems RS-232 serial cable (P/N 7310101), consult your applications engineer for power supply specifications. Mounting the Touch Screen There are several methods for mounting the touch screen depending on your application (CRT displays or flat panel displays, each in a variety of sizes). If you need instructions or recommendations from 3M Touch Systems on how to incorporate a touch screen into your design, refer to the ClearTek II Touch Screen Integration Guide (P/N 19-278v02). All 3M Touch Systems documentation is available from the corporate website at www.3Mtouch.com. Turning On Your System Before you turn on your custom system, ensure that all cables are connected properly and that the controller is properly mounted. Be sure to tighten all cable connector screws. To start up your system: 1. Turn on your monitor and computer. 2. Adjust the contrast and brightness to suit your personal preference and working environment. 3M Touch Systems Proprietary Information 14 EX II Serial Controllers Reference Guide 3. Adjust the horizontal and vertical position controls on the monitor to center the image on the screen. Status Light (LED) Diagnostics 3M Touch Systems controllers are highly reliable units; however, there may be occasions when the controller does not perform exactly as you expected. The EX II controller provides diagnostic feedback with a light emitting diode (LED) on the component side of the board that indicates the status of the touch screen unit. If the LED is on, and remains dimly lit, the controller has power and is operating properly. If the LED is off, the controller is not receiving power. When you power-up the unit, the LED is bright until the controller start-up sequence is completed. Following start-up, the LED becomes dim and remains dim as long as you do not touch the touch screen. When you touch the touch screen, the LED becomes bright as long as a touch is detected. A flashing (or blinking) LED during power-up indicates the controller's power-on self-test failed. Refer to Table 2 for a description of each error code. Table 2 LED Diagnostic Codes for EX II Controllers Flashes Error Description 1 2 3 4 5 6 7 8 9 10 11 12 What to do... Reserved. Reserved. Setup error. Unable to establish operating range at power-up. Nonrecoverable error. Controller NOVRAM error. The operating parameters in the controller NOVRAM are invalid. Using defaults. HDW error. The controller hardware failed (unable to initialize or load program). Nonrecoverable error. Reserved. Cable NOVRAM error. The linearization data in the cable NOVRAM is invalid. Replace controller. If error reoccurs, might be a touch screen problem. Restore defaults. If fault persists, replace controller. If error reoccurs, might be a touch screen or cable problem. Replace controller. At startup, the cable NOVRAM error will flash the LED until the controller receives any valid command from host. Controller NOVRAM error. The Replace touch screen or perform a 25-point controller linearization data in NOVRAM linearization. Contact Technical Support. is invalid. Reserved Controller EEPROM not formatted Reload program code Invalid controller block 5 Not applicable to serial controller. Invalid controller block 6 Restore defaults if possible, otherwise replace controller. 3M Touch Systems Proprietary Information Integrating the EX II Controllers 15 Installing Software Both TouchWare and MT 7 software include the software driver that enables your touch screen to work with your computer. 3M Touch Systems has touch screen drivers for many operating systems, including Windows XP, XP embedded, 2000, 9X, Windows Me, Windows CE, and Windows NT 4.0 (refer to the website for a complete listing). You must be sure to install the touch screen software for your operating system. Both TouchWare and MT 7 software include a control panel for setting your touch screen preferences and a diagnostic utility. If you are experiencing problems with the touch screen, you can use the diagnostic utilities provided to locate the touch screen controller and test the touch screen. For more information on connecting your cables and installing and using the touch screen control panel and utilities, refer to either the TouchWare Software User Guide or the MT 7 Software User Guide available on the corporate website at www.3Mtouch.com. 3M Touch Systems Proprietary Information CHAPTER 3 EX II Controller Communications This chapter discusses the fundamentals of communicating with the EX II controller. The firmware commands, which are usually issued by a driver or utility program on the host system, control the operation of the touch screen controller, however developers can enter these commands directly. This chapter: * * * * Describes the controller default settings. Lists the recommended firmware commands for current development. Describes how to use each of these commands. References additional commands developers may need to use. The description of each command includes the command syntax, the default value, how the command works, and the expected response from the controller. Controller Default Settings Communication Parameters The default operation of the EX II controllers is N81 (no parity, 8 data bits, and 1 stop bits) at 9600 baud. The EX II 1720SC can be programmed to work with even/odd parity, 7 data bits, and 1 or 2 stop bits. Data Format Data format refers to the type of packet the controller uses to send the X/Y touch coordinates to the host system. Format Tablet is the default format for the EX II controller. In Format Tablet, the controller sends 5 bytes per point and provides the most rapid response time to a touch. * * Format Tablet is supported by all current 3M Touch Systems touch screen controllers. It is the standard for current 3M Touch Systems product development and is the format used by all touch screen drivers written by 3M Touch Systems. Refer to the Format Tablet command in the firmware reference section. Note that both TouchWare and MT 7 software automatically set communications parameters to N81. 3M Touch Systems Proprietary Information 18 EX II Serial Controllers Reference Guide Operating Mode The operating mode specifies the conditions under which the controller sends the X/Y touch coordinates (input data packet) to the host system. Mode Stream is the default operating mode for the EX II controller. In Mode Stream, the controller sends a continuous stream of data packets when the screen is touched. The controller sends the data as long as a touch continues on the touch screen. Because Mode Stream sends touch data continually, it is the most versatile mode, and it provides the best response time and overall feel. 3M Touch Systems recommends that the touch screen driver generate an interrupt as each packet in the data stream arrives. Because touchdown and liftoff events are specially coded, your software always knows exactly what the user is doing, if the interrupts are sent as recommended. This enables instant feedback and prevents data loss. Communicating with the Controller This section provides information on sending firmware commands to the controller and interpreting the responses that the controller returns. The commands listed in the following table are those that 3M Touch Systems currently uses for development. 3M Touch Systems recommends that you use only these commands for EX II controller development. Commands to the controller are sent on the signal Receive Data (RXD) line as a serial data stream. For each command it receives, the controller sends a response to the host on the signal Transmit Data (TXD) line also as a serial data stream. Sending Commands to the Controller When you send a command to the controller, you must use the correct command format. The general format of a command is as follows: <Header>Command<Terminator> Note: The following descriptions of header, command, and terminator, use 3M Touch Systems terminal emulator key sequences. You may need to enter the sequence in a different format, depending on your emulator. The header is the first character in the command string and is the ASCII start-of-header control character SOH. The hexadecimal code for the ASCII SOH control character is 01. To start the command sequence, use the key combination Ctrl A (^A). If you are working with an IBM PC compatible system, the Ctrl A key combination immediately returns an ASCII character. The command, which always follows the header, consists of ASCII uppercase letters and numbers only (printable characters). 3M Touch Systems Proprietary Information EX II Controller Communications 19 The terminator is the last character of each command string and is an ASCII carriage return CR. An ASCII CR control character is 0D hexadecimal. To enter a carriage return, ending the command sequence, use Enter or the key combination Ctrl M (^M). This chapter lists each command as a string of ASCII control characters and printable characters consisting of a header, the command, and a terminator as follows: <SOH>Command<CR> Receiving Responses from the Controller After executing a command, the controller returns a response or acknowledgment to the host system. Each controller response consists of a header, the command response, and a terminator in the following format: <Header>Command Response<Terminator> Note: The following descriptions of header, response, and terminator, use 3M Touch Systems terminal emulator key sequences. The format of controller responses varies depending on the terminal emulation mode you are using. The header is the first character in the response string and is the ASCII start-of-header control character SOH. The hexadecimal code for the ASCII SOH control character is 01. If you are working with an IBM PC compatible system in terminal mode, the SOH control character returns a character to the screen. The response, which always follows the header, is a range of ASCII characters depending on the type of command sent. Responses can be in many forms. For example, one standard response is 0 (ASCII character `zero' or 30 hexadecimal). This response indicates a successful command completion for most commands, while it indicates a failed completion for other commands. See the firmware reference section for a description of what the response indicates for each particular command. Another standard response is 1 (ASCII character `one' or 31 hexadecimal). In most cases, this response indicates the command failed. The controller received an invalid command that it could not execute. Some possible reasons for a command failure include: * * * The command was not formatted correctly. The system parameters were not set up to allow command execution. The controller does not support the command. The terminator is the last character of each response string and is an ASCII carriage return CR. The hexadecimal code for the ASCII CR control character is 0D hexadecimal. The value returned in the response will be the ASCII control character for a carriage return, displayed on the screen as the cursor moving to the next line. 3M Touch Systems Proprietary Information 20 EX II Serial Controllers Reference Guide In this chapter, responses are shown as a string of ASCII characters consisting of a header, the response, and a terminator as follows: <SOH>Response<CR> Controller Initialization To initialize the EX II controller for new development, 3M Touch Systems recommends that the host system issue a Reset command whenever the host system is powered on and is attempting to establish communication with the controller. Firmware Commands Developers may use this information when writing touch applications, developing custom drivers or touch configurations, or testing their touch systems. Developers can use firmware commands to initialize the controller, select operating modes, specify data formats, and execute diagnostic functions. Most touch screen users do not have to use firmware commands to use their touch systems. For example, users can use either TouchWare or MT 7 software to calibrate the touch screen or to determine the controller type and firmware version. Caution: This document assumes you are familiar with firmware commands and how to use them. Executing some commands may alter the performance of your touch screen and render it inoperable. You should be aware of the results before executing any firmware commands. To optimize the performance of the Cleartek II touch screen controller and simplify the development of custom drivers, 3M Touch Systems recommends you use the commands listed in Table 3 for current development. Using these commands ensures compatibility with all 3M Touch Systems controllers. Note: When you enter commands in terminal mode, precede each command with <CTRL> A to enter the start of header. 3M Touch Systems Proprietary Information EX II Controller Communications 21 Table 3 Firmware Commands for EX II Development Command Calibrate Extended Calibrate Raw Code CX Description Initiates an interactive 2-point calibration. CR Collects the raw X and Y coordinates before normal scaling, linearization, and filtering process. Diagnostic Format Raw DX FR Format Tablet FT Mode Stream Name Null Command Output Identity Parameter Set MS NM Z OI Ppds[b] Reset R Restore Defaults RD Unit Type Verify UV Determines if there is a problem with the touch screen. Returns the signal level (amount of touch) of each of the four touch screen corners in digital format. Outputs the X/Y touch coordinate data in a five-byte packet. Preferred for current development. Sends a continuous stream of X/Y coordinate data when you touch the screen. Returns a controller identifier string. Queries the controller and waits for a response. Identifies the controller type and the firmware version. Lets you adjust the communication parameters (parity, data bits, and stop bits) of the controller. Initializes the hardware and the firmware, causes the controller to stop sending data, and recalculates the environmental conditions. Returns the controller to the factory default operating parameters. Note: the serial port is reset to N81 format tablet and 2-point calibration is lost. Identifies the touch screen controller on your system. Calibrate Extended Syntax: <SOH>CX<CR> Note: This command should not be used when TouchWare or MT 7 software is being used. The CX command will interfere with the auto orientation algorithm. To calibrate, use the 2- or 4-point calibration in TouchWare or MT 7 software. Description: Initiates an interactive 2-point calibration. During the calibration process, you define the active area of the touch screen by mapping locations to an absolute X/Y coordinate system. You touch two target areas on the screen. Touching the target areas sends the X/Y coordinates for those touch points to the controller. The controller calculates all other touch points based on these two points. The Calibrate Extended command sets the calibration targets (points) inward from the corner of the video image. Setting the targets inward makes the calibration process easier and more accurate. Guidelines for Calibrate Extended Here are several guidelines for using the Calibrate Extended command: * The controller uses the data immediately before liftoff to register a calibration touch. Therefore, you can touch the screen, move your finger to the target, hold for a few seconds, and then lift off. Instructing users to touch this way results in a more accurate calibration. 3M Touch Systems Proprietary Information 22 EX II Serial Controllers Reference Guide * * The controller stores the data in non-volatile memory (NOVRAM). Therefore, you do not have to calibrate the screen each time you power on the system. You should, however, recalibrate the touch screen any time the video display changes size or resolution. You can restart calibration at any time during this sequence by issuing a Reset command and reissuing a CX command. Determining Target Areas The default calibration targets (points) are located 12.5% (1/8) inward from the corners of the video image. For example, suppose the display resolution of your monitor is 1024 x 768. The Calibrate Extended command calculates the amount to move inward as follows: * * Amount to move inward in the X direction: 1024 x 1/8 = 128 Amount to move inward in the Y direction: 768 x 1/8 = 96 The Calibrate Extended command then positions the first calibration target inward from the lower left corner and the second calibration target inward from the upper right corner. The following illustration shows how the calibration targets are calculated. *The coordinates are in video terms, with the origin (0, 0) in the upper left corner of the screen. Examples from the (1023, 0) [1024, 1024]* (0, 0) (560, (895,420) 96) Upper Right Calibration Target X = 1023 - (1024 x 1/8) = 1023 - 128 = 895 Y = 0 + (768 x 1/8) = 0 + 96 = 96 (128, 671) (80, 60) [1024, 0]* (0, 767) [0,0]* Lower Left Calibration Target X = 0 + (1024 x 1/8) = 0 + 128 = 128 Y = 767 - (768 x 1/8) = 767 - 96 = 671 controller's perspective, however, place the origin at the lower left corner of the screen (numbers in brackets). The controller outputs 0 to 1024 on both axes independent of display screen resolution. Calibrate Extended Procedure To use the CX command: 1. Enter the Calibrate Extended (CX) command. The controller sends an initial acknowledgment of <SOH>0<CR>. 2. Touch the screen at a lower left target, which is located 12.5% (1/8) in from the corner of the video image. The controller returns an acknowledgment of <SOH>1<CR>. This is a positive response. If you receive a negative response <SOH>0<CR>, you can cancel the calibration by issuing a Rest command and then start over again. 3M Touch Systems Proprietary Information EX II Controller Communications 23 3. Touch the screen at an upper right target, which is located 12.5% (1/8) in from the corner of the video image. The controller returns an acknowledgment of <SOH>1<CR>. This is a positive response. If you receive a negative response, you must start over again. Touching the two valid calibration points results in a successful calibration. If either calibration point is invalid, the calibration fails. The EX II 1700SC and 7720SC controller restores the previous calibration values. If the Calibrate Extended failed, repeat the CX process. Response: <SOH>1<CR> Positive response. Indicates that the controller received a valid touch coordinate (point) when the target was touched. Two valid touch points indicate a successful calibration. <SOH>0<CR> Negative response Indicates that the touch point is out of range of the expected target area. If you receive a negative response, you must start over again. No Response Indicates that the user did not touch the target long enough to provide an accurate calibration point. Calibrate Raw Syntax: <SOH>CR<CR> Description: Allows the collection of raw (signed) X and Y coordinates before the normal scaling, linearization, and filtering processes. The controller sends a continuous stream of data in Calibrate Raw mode. The Calibrate Raw data is a 5-byte packet that includes 1 status byte and 4 bytes of binary X/Y coordinate data. Each X/Y coordinate includes 10 binary bits and 1 sign bit. The 10 bits represent coordinates within a range of -1024 to +1023. To use the Calibrate Raw command, the controller and host system must be in an 8-bit data communication mode. The Calibrate Raw command returns a negative response if the controller is not using an 8-bit communication mode. To end Calibrate Raw mode, issue a Reset command. 3M Touch Systems uses the Calibrate Raw command during manufacturing and testing, and recommends you only use this command for diagnostics when you want raw data. Response: <SOH>0<CR> Positive response. After the controller is in Calibrate Raw mode, the controller returns a response in the following format: SXxYy where: 3M Touch Systems Proprietary Information 24 EX II Serial Controllers Reference Guide S = Status byte, first byte of data. Refer to Table 4. Xx = X (horizontal) coordinate data; second and third bytes of data Yy = Y (vertical) coordinate data; fourth and fifth bytes of data. Table 4 Data Sequence MSB* 7 1 0 0 0 0 Data Sequence S- Byte 1 X- Byte 2 x- Byte 3 Y- Byte 4 y- Byte 5 6 S6 X3 Xs** Y3 Ys** Bits 5 4 Reserved X2 X1 X9 X8 Y2 Y1 Y9 Y8 3 X0 X7 Y0 Y7 2 X6 Y6 1 LSB* 0 Reserved X5 X4 Reserved Y5 Y4 *MSB = Most Significant Bit, LSB = Least Significant Bit ** s = sign bit Table 5 describes the meaning of the bits in the status byte (Byte 1). Table 5 Calibrate Raw Status Bits Bit Description Values S0 - S5 Reserved -- S6 Proximity (touch state) 1 = Touch screen is being touched (a touchdown or a continued touch). 0 = Touch screen is not being touched (a touch liftoff or inactive). When the proximity bit changes from 1 to 0 (touch liftoff), the controller outputs one final set of X/Y coordinate data with the bit equal to 0 and the X/Y coordinate data equal to the last touch point. S7 Packet synchronization Always 1. Diagnostic Command Syntax: <SOH>DX<CR> Description: This command requests the controller to check for touch screen failures such as broken corners, broken wires, etc. Response: <SOH>0<CR> <SOH>1<CR> <SOH>2<CR> Positive response. Command not supported. Failure detected. 3M Touch Systems Proprietary Information EX II Controller Communications 25 Format Raw Syntax: <SOH>FR<CR> Description: Returns the signal level (amount of touch) of each of the four touch screen corners in digital format. The returned values are not corrected for stray values. The Format Raw data is a 41-byte packet that includes 1 status byte and 40 bytes of binary corner data. The first byte of each packet always has its high bit (Bit 7) set to provide synchronization with the host system. Refer to Table 6 for General Packet Formats. Each corner data is composed of a pair of 32-bit I and Q values, which are delivered in 10 bytes. I and Q are complex touch currents as measured in phase and 90 degrees out of phase with the corner drive signal. Refer to Table 7 for I/Q Corner Components. To use the Format Raw command, the controller and host system must be in an 8-bit data communication mode. The Format Raw command returns a negative response if the controller is not using an 8-bit communication mode. To terminate Format Raw, issue a Reset command. The controller may return several bytes of data between the time you issue a Reset command and the controller receives it. You can either scan the data stream for the Reset acknowledgment, or you can ignore the response to the first Reset command and then issue a second Reset after approximately 10 seconds has passed. Use the Format Raw command for diagnostics. Use Format Tablet for standard touch screen operation. Response: <SOH>0<CR> Positive response. After the controller is in Format Raw mode, the controller returns a continuous response in the following format: <41-byte-packet><41-byte-packet>...<41-byte-packet>... Table 6 General Packet Format Byte 1 2-6 7-11 12-16 17-21 22-26 27-31 32-36 37-41 Bits 0 - 7 b0 - b6: Reserved b7: Synchronization bit (Always 1) I component of upper left (UL) corner Q component of upper left (UL) corner I component of upper right (UR) corner Q component of upper right (UR) corner I component of lower left (LL) corner Q component of lower left (LL) corner I component of lower right (LR) corner Q component of lower right (LR) corner 3M Touch Systems Proprietary Information 26 EX II Serial Controllers Reference Guide Table 7 I/Q Corner Component Byte N N+1 N+2 N+3 N+4 Bits 0 - 7 b0 - b6: bits 25-31 of respective I/Q corner data b7: Always 0 b0 - b6: bits 18-24 of respective I/Q corner data b7: Always 0 b0 - b6: bits 11-17 of respective I/Q corner data b7: Always 0 b0 - b6: bits 4-10 of respective I/Q corner data b7: Always 0 b0 - b3: bits 0-3 of respective I/Q corner data b4 - b7: Always 0 Format Tablet Syntax: <SOH>FT<CR> Description: Outputs the X/Y touch coordinate data in a 5-byte packet. The packet includes 1 status byte and 4 bytes of binary X/Y coordinate data. The protocol also establishes the X and Y coordinate output as 14 binary bits providing a range of 0 to 16,383. The low order bits (X3 - X0 and Y3 - Y0) are not significant in a 1024 by 1024 touch screen because data can fluctuate with each touch, and therefore may not be completely accurate. To use Format Tablet, the controller and host system must be in an 8-bit data communication mode. The Format Tablet command returns a negative response if the controller is in 7-bit format. Response: <SOH>0<CR> Positive response. With the controller in Format Tablet mode, touching the screen causes the controller to return a response in the following format: SXxYy S = Status byte, first byte of data. Refer to Table 8. Xx = X (horizontal) coordinate data; second and third bytes of data. Yy = Y (vertical) coordinate data; fourth and fifth bytes of data. 3M Touch Systems Proprietary Information EX II Controller Communications 27 Table 8 Data Sequence MSB* Data Sequence 7 6 S Byte 1 1 S6 X Byte 2 0 X6 x Byte 3 0 X13 Y Byte 4 0 Y6 y Byte 5 0 Y13 5 S5 X5 X12 Y5 Y12 Bits 4 S4 X4 X11 Y4 Y11 3 S3 X3 X10 Y3 Y10 2 S2 X2 X9 Y2 Y9 1 S1 X1 X8 Y1 Y8 LSB* 0 S0 X0 X7 Y0 Y7 *MSB = Most Significant Bit, LSB = Least Significant Bit Table 9 defines the status bits (Byte 1) for the Format Tablet data. Table 9 Format Tablet Status Bits Bit Description Values S0 - S5 Reserved -- S6 Proximity (touch state) 1 = Touch screen is being touched (a touchdown or a continued touch). 0 = Touch screen is not being touched (a touch liftoff or inactive). When the proximity bit changes from 1 to 0 (touch liftoff), the controller outputs one final set of X/Y coordinate data with the bit equal to 0 and the X/Y coordinate data equal to the last touch point. S7 Packet synchronization Always 1. Mode Stream Syntax: <SOH>MS<CR> Description: Sends a continuous stream of X/Y coordinate data when you touch the screen. The controller continues to send data as long as you touch the screen. The controller sends the data even if the touch is stationary and unchanging. The format of the coordinate data depends on the last format command received by the controller. Response: <SOH>0<CR> Positive response. Name Command Syntax: <SOH>NM<CR> Description: This command returns a string of characters to help identify the controller. The string contains the controller model number and current firmware revision number (e.g., EXII-7720 Rev. 3.0) The content and format of this command can change and therefore is not intended for normal customer use. 3M Touch Systems Proprietary Information 28 EX II Serial Controllers Reference Guide Null Command Syntax: <SOH>Z<CR> Description: Queries the controller and waits for a response. Use Z to determine that you are communicating with the controller or to make sure that a utility is communicating with the controller. Using this command does not affect the controller's current operating parameters. Response: <SOH>0<CR> Positive response. Output Identity Syntax: <SOH>OI<CR> Description: Returns a 6-character random identifier, which describes the controller type and the firmware version number. Response: <SOH>CcXxxx<CR> where: = Two ASCII characters that describe the type of 3M Touch Systems controller. = Four ASCII characters that indicate a build identifier. Cc Xxxx Parameter Set Syntax: <SOH>Ppds[b]<CR> where: P D S B Description: = Parity type N = No parity O = Odd parity E = Even parity = Number of data bits (7 or 8). = Number of stop bits (1 or 2) = Communication rate 1 = 19200 baud 4 = 2400 baud 2 = 9600 baud 5 = 1200 baud 3 = 4800 baud Lets you adjust the communication parameters (parity, data bits, and stop bits) of the controller. Optionally, you can change the communication rate by appending an additional character to the command string. Upon execution of the Parameter Set command, the controller automatically stores the new settings, the current operating mode, and the current data format in NOVRAM. The communication parameters of the host system must match the present settings of the controller when the command is given for it to be accepted and the changes implemented. 3M Touch Systems Proprietary Information EX II Controller Communications 29 The process of changing the parameters takes three steps: * * * Examples: The host system must first communicate with the controller using a matched set of parameters. The Parameter Set command is issued with the new parameters to the controller. The new settings take effect immediately. The host system must be changed to the new parameters in order to communicate with the controller again. <SOH>PN813<CR> Sets the serial line to no parity, eight data bits, one stop bit, and 4800 baud. <SOH>PN81<CR> Sets the parity, data bits, and stop bits; leaves the baud at its previous value. Caution: The settings are immediately written to NOVRAM, and all future communication must occur at the new values. It is possible to set the parameters to values that prevent future communication with the controller. Response: <SOH>0<CR> Positive response. Reset Syntax: <SOH>R<CR> Description: Initializes the hardware and the firmware, causes the controller to stop sending data, and recalculates the environmental conditions (for example, stray and offset values). The Reset command also cancels the Format Raw, Calibrate Raw, and Calibrate Extended commands and returns the controller to normal operation. 3M Touch Systems recommends that the host system issue a Reset command whenever the host system is powered on and is attempting to establish communication with the controller. The amount of time needed to execute a Reset command ranges from 225 milliseconds to 800 milliseconds. Therefore, the application program should wait and be sure it receives the command response before issuing another command to the controller following the reset. Response: <SOH>0<CR> Positive response. 3M Touch Systems Proprietary Information 30 EX II Serial Controllers Reference Guide Restore Defaults Syntax: <SOH>RD<CR> Description: Returns to the factory default operating parameters. The Restore Defaults command copies the 3M Touch Systems factory default parameters from ROM to the non-volatile memory (NOVRAM) and then executes a Reset command. Table 10 lists the factory defaults for the EX II controller. The Restore Defaults command is useful in situations where inadvertent commands to the controller have rendered the touch screen inoperative. Table 10 EX II Factory Default Settings Operating Parameter Baud Rate Serial Communication Settings Data Format Operating Mode Return to Factory Calibration Default 9600 N, 8, 11 Format Tablet Mode Stream Yes The Restore Defaults command requires approximately 1.8 seconds. Therefore, the application program should wait the maximum amount of time and be sure it receives the command response before issuing another command to the controller. Note: After you issue a Restore Defaults command, you must recalibrate your touch screen using a 2-point calibration. Response: <SOH>0<CR> Positive response. Unit Type Verify Syntax: <SOH>UV<CR Description: Responds with an 8-character identity string. This string identifies the type of controller currently attached to the system, lists the features supported by the controller, and outputs the status of the controller hardware (a self-test code). Response: Returns an identification code up to 8 ASCII characters in the following format: <SOH>TtFfffSs<CR> where: Tt Ffff 1 = Two ASCII characters that identify the controller type. QM = Serial controller = Four ASCII characters that indicate the features supported by the controller. R= Indicates a resistive controller The EX II 1720SC controller operates at N, 7, 2. 3M Touch Systems Proprietary Information EX II Controller Communications Ss 31 V= Indicates the serial controller ****= Indicates no additional features configured = Two ASCII characters that provide status information about the controller hardware. The two characters represent one byte. Each character is in the range 0 to 9 and A to F. Table 2 defines the meaning of each bit (LED minus 1) in the status byte. Each bit can be set to 1 or 0, where: 1 = Error 0 = No error 00 = No diagnostic errors (normal response) 3M Touch Systems Proprietary Information APPENDIX A EX II 17xxSC Controller Specifications This section provides controller specifications such as power requirements, environmental requirements, and cable connectors. The EX II 17xxSC controller is a compact (3.5 x 2.25 x 0.3 inches), RS-232 serial controller. This controller can be internally mounted in your monitor, or enclosed in a molded plastic case (3.75 x 2.5 x 0.9 inches) and mounted to the back or side of your monitor. The following figures show the overall dimensions of the EX II 17xxSC controller and the locations of the mounting holes and connectors. Figure 3 Uncased EX II 17xxSC Touch Screen Controller 3M Touch Systems Proprietary Information 34 EX II Serial Controllers Reference Guide Figure 4 Cased EX II 17xxSC Touch Screen Controller Technical Specifications The controller specifications listed below were validated in test systems containing 3M Touch Systems components. These specifications may not be valid if configured with components from suppliers other than 3M Touch Systems. All components in the manufacture of electronic controllers are RoHS Directive compliant (2002/95/EC). Physical Dimensions Uncased Cased 3.50 in. x 2.30 in. x 0.45 in. 3.75 in. x 2.50 in. x 0.90 in. (88.9 mm x 58.4 mm x 11.4 mm) (95.3 mm x 63.5 mm x 22.9 mm) Board Level Functions Power 5 VDC (80 mA typical, 100 mA maximum); 5% regulation 50 mVpp maximum ripple and noise 12 VDC (85 mA typical, 100 mA maximum); 10% regulation 50 mVpp maximum ripple and noise Regulatory Requirements CE Compliant Radiated Emissions - EN 55022:1998 Class B Compliant AC Mains Conducted Emissions - EN 55022:1998 Class B Compliant Telco Lines Conducted Emissions N/A N/A FCC Class B / CISPR22 Class B Class B Compliant VCCI Class B ITE Emissions (Japan) Class B Compliant 3M Touch Systems Proprietary Information EX II 17xxSC Controller Specifications 35 AS/NZS 3548:1995/CISPR 22 Class B ITE Emissions (Aus.) Class B Compliant RFI - EN 61000-4-3 / ENV 50140 Compliant CRFI - EN 61000-4-6 Class A N/A Cable < 3 meters long Class A < 80% Screen Area Class B 80% Screen Area N/A EFT (Burst Immunity) - EN 61000-4-4 Class B Compliant ESD Susceptibility - IEC 61000-4-2 Class 1 Compliant Surge - EN 61000-4-5 Class B Compliant Harmonics - EN 61000-3-2 Class A Compliant Flicker - EN 61000-3-3 Compliant Power Frequency Magnetic Field - EN 61000-4-8 Class A Voltage Dips - EN 61000-4-11 Voltage Interruptions - EN 61000-4-11 Compliant Class B < 5% V Class C < 70% VCompliant Class C UL/cUL Compliant Compliant Ambient Operating and Storage Environmental Conditions All Humidity is Non-Condensing Operating Temperature Range - 40 C to +70 C Operating Humidity Range < 36 C 0-95% RH 36 C Storage Temperature Range - 50 C to +85 C Storage Humidity Range < 36C 0-80% RH 36 C Performance and Reliability Minimum Touch Duration As low as 3 msec. Touch Resolution - (Maximum addressable coordinates generated by the controller) 16K x 16K ESD Susceptibility 8 kV Contact Discharge* - Class 2 per section 9 of IEC 61000-4-2 Compliant 1 false touch allowed 27 kV Air Discharge* - Class 1 per section 9 of IEC 61000-4-2 Compliant Normal Operation - No false touches * ESD discharges to a 3M Touch Systems touch screen connected to the controller MTBF (by MIL Std. 217F Calculation)> 740,000 Hours Touch System Parameters Accuracy vs. Dynamic Temperature Change Maintains 1% Accuracy (tested at 0 deg. C to 60 deg. C with a 0.5 deg. C/minute temperature ramp) Touch Screen Compatibility 3M Touch Systems Capacitive Touch Screens Communications Protocol Serial RS 232 3M Touch Systems Proprietary Information 36 EX II Serial Controllers Reference Guide Female Connector on the Touch Screen Cable The touch screen cable has a 12-pin (2 x 6) dual row female connector that plugs into the controller. Table 11 describes the pins on this connector. The touch screen connector always exits towards the serial cable. Table 11 Touch Screen Cable Connector for EX II 17xxSC Controllers Pin Wire Color Description 1 ------ NOVRAM interface 2 3 4 5 6 7 8 ------ ------ ------ Gray Green Orange Brown Cable shield/drain wire White Red Black Blue NOVRAM interface NOVRAM interface +5 VDC Power supply ground Chassis (earth) ground +12V input Connects to the flex tail shield, which must not be grounded because the EX II 17xxSC drives the flex tail shield with an AC waveform. Upper right (UR) corner Lower right (LR) corner Upper left (UL) corner Lower left (LL) corner 9 10 11 12 Communication Connector All EX II 17xxSC controllers have an attached RS-232 communication cable with a 9-pin D female connector. Table 12 describes the pins for this cable, which connects to a serial communication (COM) port on the PC. A 9-pin to 25-pin adapter is available. Table 12 COM Connector for EX II 1700SC Controllers 9-pin D 7-pin Molex Wire Color Description 1 ------ 2 No connection 2 3 3 Red 4 ------ 7 No connection 5 No connection 1 8 4 Green Data Carrier Detect (DCD). Connected to DTR and DSR. Transmit Data (TXD). Pin 2 is the controller's output to the host. Receive Data (RXD). Pin 3 is the controller's receive from the host. Data Terminal Ready (DTR). Connected to DSR and DCD. Power supply ground. Data Set Ready (DSR). Connected to DTR and DCD. Request To Send (RTS). Connected to CTS. Clear To Send (CTS). Connected to RTS. 9 Sleeve Pin Not used 6 7 White ------ Shell 7 ------ 5 6 Brown Blue ------ Black DC power jack (+5 VDC). Cable shield connected to ground. DC power jack (ground). Chassis (earth) ground. 3M Touch Systems Proprietary Information APPENDIX B EX II 7720SC Controller Specifications This section provides controller specifications such as power requirements, environmental requirements, and cable connectors. The EX II 7720SC controller is a compact RS-232 serial controller. This controller can be internally mounted in your monitor. The following figures show the overall dimensions of the EX II 7720SC controller and the locations of the mounting holes and connectors. Figure 4 EX II 7720SC Touch Screen Controller 3M Touch Systems Proprietary Information 38 EX II Serial Controllers Reference Guide Touch Screen Cable Connections The touch screen cable has a 5-pin single row locking female connector that plugs into the controller. Table 13 describes the pins on this connector. Table 13 Touch Screen Cable Connector for EX II 7720SC Controllers Pin Wire Color 3 Cable shield/drain wireConnects to the flex tail shield, which must not be grounded because the EX II 7720SC drives the flex tail shield with an AC waveform. Upper left (UL) corner Upper right (UR) corner Lower right (LR) corner Lower left (LL) corner 1 2 4 5 Description Communication Connector You will need a method of establishing the serial data communication between the controller and your system. You can build your own or purchase the standard 3M Touch Systems RS-232 serial cable (P/N 7310101). Table 14 describes the pins for this cable, which connects to a serial communication (COM) port on the PC. Table 14 COM Connector for EX II 7720SC Controllers 9-pin D 7 7-pin Molex Wire Color No ------ connection 2 Brown 3 Red No ------ connection 5 Blue No ------ connection 1 Black 8 4 Green 9 Sleeve Pin Not used 6 7 White Shield Shell 7 ------ 1 2 3 4 5 6 Description Data Carrier Detect (DCD). Connected to DTR and DSR. Transmit Data (TXD). Pin 2 is the controller's output to the host. Receive Data (RXD). Pin 3 is the controller's receive from the host. Data Terminal Ready (DTR). Connected to DSR and DCD. Power supply ground. Data Set Ready (DSR). Connected to DTR and DCD. Request To Send (RTS). Connected to CTS. Clear To Send (CTS). Connected to RTS. DC power jack (+5 VDC). Cable shield connected to ground. DC power jack (ground). Chassis (earth) ground. 3M Touch Systems Proprietary Information EX II 7720SC Controller Specifications 39 Technical Specifications The controller specifications listed below were validated in test systems containing 3M Touch Systems components. These specifications may not be valid if configured with components from suppliers other than 3M Touch Systems. All components in the manufacture of electronic controllers are RoHS Directive compliant (2002/95/EC). Physical Dimensions Uncased 2.55 in. x 1.30 in. x 0.45 in. (65.0 mm x 33.0 mm x 11.4 mm) Board Level Functions Power 5 to 12 VDC (85 mA typical, 110 mA maximum); 5% regulation 50 mVpp maximum ripple and noise Regulatory Requirements CE Compliant Radiated Emissions - EN 55022:1998 Class B Compliant AC Mains Conducted Emissions - EN 55022:1998 Class B Compliant Telco Lines Conducted Emissions N/A N/A FCC Class B / CISPR22 Class B Class B Compliant VCCI Class B ITE Emissions (Japan) Class B Compliant AS/NZS 3548:1995/CISPR 22 Class B ITE Emissions (Aus.) Class B Compliant RFI - EN 61000-4-3 / ENV 50140 Compliant Class A CRFI - EN 61000-4-6 N/A Cable < 3 meters long Class A < 80% Screen Area Class B 80% Screen Area N/A EFT (Burst Immunity) - EN 61000-4-4 Class B Compliant ESD Susceptibility - IEC 61000-4-2 Class 1 Compliant Surge - EN 61000-4-5 Class B Compliant Harmonics - EN 61000-3-2 Class A Compliant Flicker - EN 61000-3-3 Compliant Power Frequency Magnetic Field - EN 61000-4-8 Class A Voltage Dips - EN 61000-4-11 Class B < 5% V Class C < 70% V Voltage Interruptions - EN 61000-4-11 Class C UL/cUL Compliant Compliant Compliant Compliant Ambient Operating and Storage Environmental Conditions All Humidity is Non-Condensing Operating Temperature Range Operating Humidity Range - 40 C to +70 C <36 C 0-95% RH 36 C Storage Temperature Range - 50 C to +85 C Storage Humidity Range < 36C 0-80% RH 3M Touch Systems Proprietary Information 40 EX II Serial Controllers Reference Guide 36 C Performance and Reliability Minimum Touch Duration As low as 3 msec. Touch Resolution - (Maximum addressable coordinates generated by the controller) 16K x 16K ESD Susceptibility 8 kV Contact Discharge* - Class 2 per section 9 of IEC 61000-4-2 Compliant 1 false touch allowed 27 kV Air Discharge* - Class 1 per section 9 of IEC 61000-4-2 Compliant Normal Operation - No false touches * ESD discharges to a 3M Touch Systems touch screen connected to the controller MTBF (by MIL Std. 217F Calculation)> 700,000 Hours Touch System Parameters Accuracy vs. Dynamic Temperature Change Maintains 1% Accuracy (tested at 0 deg. C to 60 deg. C with a 0.5 deg. C/minute temperature ramp) Touch Screen Compatibility 3M Touch Systems Capacitive Touch Screens Communications Protocol Serial RS 232 3M Touch Systems Proprietary Information