mTouch™ AR1100 Analog Resistive USB and RS-232 Touch Screen Controller Board User’s Guide 2011 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature.
mTouch™ AR1100 User’s Guide Table of Contents Preface ........................................................................................................................... 5 Introduction............................................................................................................ 5 Document Layout .................................................................................................. 6 Recommended Reading.........................................................................
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 4 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Preface NOTICE TO CUSTOMERS All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number.
mTouch™ AR1100 User’s Guide DOCUMENT LAYOUT This document describes how to use the mTouch™ AR1100 Analog Resistive USB and RS-232 Touch Screen Controller Board. The manual layout is as follows: • • • • • • • Chapter 1. “Product Overview” Chapter 2. “Connections” Chapter 3. “Operation” Chapter 4. “Software Device Drivers” Chapter 5. “Accessories” Chapter 6. “Support” Chapter 7.
Preface CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • • • • Distributor or Representative Local Sales Office Field Application Engineer (FAE) Technical Support Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 8 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 1. Product Overview 1.1 INTRODUCTION The Microchip mTouchTM AR1100 Analog Resistive USB and RS-232 Touch Screen Controller Board represents a feature-rich, fully-integrated universal touch screen controller solution. The AR1100 Touch Screen Controller Board automatically selects between USB and RS-232 communication protocols, as well as supports 4, 5 or 8-wire analog resistive touch screens from any of a variety of touch screen manufacturers.
mTouch™ AR1100 User’s Guide • USB plug and play - USB mouse (HID-MOUSE) or - Single-touch Win7 digitizer (HID-DIGITIZER) • Jumper-selectable sensor support - 5 wire - 4/8 wire • Dynamic rise-time and sampling capability • Resolution: - 10-bit measurement (1024x1024) - 12-bit reporting (4096x4096) of processed touch coordinates - Report rate: 150 rps (typical) - Touch screen resistance – 2k ohm sheet resistance lead to lead.
Product Overview TABLE 1-1: PCB – MECHANICAL DIMENSIONS Units: Millimeters Dimension Limits: MIN. NOM. Inches MAX. MIN. 70.56 2.658 NOM. 2.718 MAX. Overall Length D 67.51 69.02 2.778 Overall Width E 24.28 25.81 27.33 0.956 1.016 1.076 PCB Length D1 52.07 53.59 55.12 2.050 2.110 2.17 PCB Width E1 2.29 24.38 25.91 0.090 0.960 1.02 Overall Height A — — 11.63 — — 0.458 PCB Thickness A1 1.42 15.75 1.73 0.056 0.620 0.068 Component Height A2 — 6.35 7.
mTouch™ AR1100 User’s Guide 1.2.4 Electrical TABLE 1-2: PCB – ELECTRICAL SPECIFICATIONS Conditions Supply Voltage Supply Current Suspend Current Min. Typical 3.3 RS-232 (idle) 16 RS-232 (touch) 18 USB (idle) 17 USB (touch) 25 RS232 USB -40 Board -25 Resolution VCC: +5V, VDD: Gnd µA 125 °C 85 °C Pixels Normal 8 ms Waking 10 1.65 Touch Screen Resistance DS41604A-page 12 mA 1024 x 1024 Detect Voltage Threshold Note 1: V 330 Chip Touch Capacitance Units 5.
mTouch™ AR1100 User’s Guide Chapter 2. Connections FIGURE 2-1: 2.1 CONNECTIONS – OVERVIEW MOUNTING Two static ground mounting holes (0.122" diameter) are provided. Take special care to insulate the controller from system and from EMI and RFI generating components of the display. Use conductive 4-40 stand-offs or ground-lead wires terminated to the grounded system enclosure or PC board to insure proper static protection and grounding. STANDOFFS MUST NOT TOUCH ANY PORTION OF THE CIRCUIT.
mTouch™ AR1100 User’s Guide WARNING SUPPLYING POWER FROM TWO DIFFERENT POWER SOURCES WILL PERMANENTLY DESTROY YOUR CONTROLLER, YOUR COMPUTER, OR YOUR MONITOR. If the Microchip AR1100 Touch Screen Controller Board is installed into a monitor application where the end user will decide to use USB communication or RS-232 communication, the board must be powered internally.
Connections 2.3.2 USB Microchip cable harness p/n: C72-080S1F-04XAXM-D is a 6' long, jacketed shielded cable terminated by a Type “A” USB plug and an 8-position, single-row socket. DO NOT SUPPLY POWER FROM BOTH RS-232 AND USB. FIGURE 2-4: USB WARNING SUPPLYING POWER FROM TWO DIFFERENT POWER SOURCES COULD PERMANENTLY DAMAGE YOUR CONTROLLER, YOUR COMPUTER, AND/OR YOUR MONITOR.
mTouch™ AR1100 User’s Guide 2.4 SENSOR The AR1100 Touch Screen Controller Board supports 4, 5 and 8-wire sensors. A 2x8 pin header (“SENSOR”) seen in the mechanical diagram is the connection point for all 3 sensor types. Additionally, a 4-conductor flat flex connector can be used with 4-wire sensors. An illustration of sensor wiring/construction is given below for reference (see Figure 2-5). FIGURE 2-5: SENSOR CONNECTIONS 2.4.
Connections 2.4.2 Connector: ‘SENSOR’ – 2x8 Header Sullins part number: PTC08DBAN. 2 x 8, 0.100" spacing, .024" sq.post, .230" mating length. TABLE 2-2: SENSOR PIN ASSIGNMENTS Function FIGURE 2-6: Pin# Function Y+ 1 2 Y- X+ 3 4 SY- 5WSX- 5 6 SY+ X- 7 8 Y+ Y- 9 10 X- X- 11 12 5WSX- Y+ 13 14 SX+ X+ 15 16 X+ SENSOR CONNECTIONS 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 18 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 3. Operation 3.1 CONFIGURATION The AR1100 Touch Screen Controller Board is operational out of the box. Communication protocol is detected automatically (as described below) and the Mechanical mode jumper selects between 5-wire (jumper on) and 4/8-wire (jumper off). If a USB cable is connected, the AR1100 Touch Screen Controller Board will default to Mouse mode (HID-MOUSE).
mTouch™ AR1100 User’s Guide 3.3.
Operation TouchMode[2:0] = PU[2:0] Response to event PU (PEN/TOUCH UP) b000 No touch report issued in response to the event b001 Touch report w/ P=0 b010 Touch report w/ P=1 b011 Touch report w/ P=1, then Touch report w/ P=0 b100 Touch report w/ P=0, then Touch report w/ P=1, then Touch report w/ P=0 b101 Touch report w/ P=0, then Touch report w/ P=1 3.3.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 22 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 4. Software Device Drivers Microchip Technology has device driver software available for all AR1100 touch screen controller chip and board solutions. The software drivers may be downloaded at no additional charge at: www.microchip.com/mtouch The Microchip device driver software enables you to configure the touch screen operation to meet your needs. The following is a list of features available with Microchip’s software: 1.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 24 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 5. Accessories 5.1 COMMUNICATION CABLES TABLE 5-1: COMMUNICATION CABLES Part Number 5.2 Description C72-080S1F-09XDXF 6' RS-232 cable. Female DB9 to 8-position SIP socket Direct connect to H1 header C72-080S1F-04XAXM-D 6' USB cable. Male type A USB to 8-postion SIP socket Direct connect to H1 header TOUCH SCREEN CABLES TABLE 5-2: TOUCH SCREEN CABLES Part Number Description C18-040S1F-040G1M 4-Wire – 18", 4-position, 0.100" SIP header to SIP socket.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 26 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 6. Support Webticket Support System: http://support.microchip.com In the event that you need to contact Microchip via telephone or via our support e-mail, please take a minute to identify these items prior to contacting Microchip technical support staff.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 28 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Chapter 7. Touch Screen Selection The 4 and 8-wire touch screens are typically produced with higher resistance transparent conductive film (ITO Indium Tin Oxide) than 5-wire touch screens. Most often, touch screen resistance falls within 100-400 Ohm per square. Because 4 and 8-wire touch screens typically have a higher resistance than 5-wire sensors, you will find most battery-powered applications using this technology.
mTouch™ AR1100 User’s Guide NOTES: DS41604A-page 30 2011 Microchip Technology Inc.
mTouch™ AR1100 User’s Guide Index A T Accessories.............................................................. 25 AR1100 Core Features .............................................. 9 AR1100BRD .............................................................. 9 The Microchip Web Site ............................................. 6 Touch Screen Cables............................................... 25 Touch Screen Selection ........................................... 29 C W Communication ................
Worldwide Sales and Service AMERICAS ASIA/PACIFIC ASIA/PACIFIC EUROPE Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.
