AR1100 Resistive USB and RS-232
Touch Screen Controller
Data Sheet
2011 Microchip Technology Inc.
Preliminary
DS41606A
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Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
K
EE
L
OQ
, K
EE
L
OQ
logo, MPLAB, PIC, PICmicro, PICSTART,
PIC
32
logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, chipKIT,
chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,
dsPICworks, dsSPEAK, ECAN, ECONOMONITOR,
FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP,
Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB,
MPLINK, mTouch, Omniscient Code Generation, PICC,
PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE,
rfLAB, Select Mode, Total Endurance, TSHARC,
UniWinDriver, WiperLock and ZENA are trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2011, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-61341-489-7
Microchip received ISO/TS-16949:2009 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC
®
MCUs and dsPIC
®
DSCs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS41606A-page 2
Preliminary
2011 Microchip Technology Inc.
AR1100 RESISTIVE USB AND RS-232
TOUCH SCREEN CONTROLLER
AR1100 Resistive USB and RS-232 Touch Screen Controller
Special Features:
•
•
•
•
•
RoHS Compliant
Power-saving Sleep mode
Industrial Temperature Range
Built-in Drift Compensation Algorithm
96 Bytes of User EEPROM
Touch Sensor Support:
• 4-wire, 5-wire and 8-wire Analog Resistive
• Lead-to-Lead Resistance: 500-2000 Ohm
• Layer-to-Layer Capacitance: 0-0.5 uF
Touch Resolution:
• 12-bit Resolution (maximum)
• 10-bit Measured
Power Requirements:
• Operating Voltage: 3.3-5.0V +/- 5%
• Standby Current:
- <10 uA (UART)
- <325 uA (USB)
• Operating Current:
- <17 mA (no touch)
- <25 mA (touch) (see
Note
below)
Touch Coordinate Report Rate:
• 150 Reports Per Second (typ.) (see
Note
below)
Note:
Actual report rate is dynamically/automat-
ically maximized according to the electri-
cal characteristics of the sensor in use.
Note:
Results vary slightly with sensor.
Touch Modes:
• Off, Stream, Down and Up
Communication:
• Automatic Detection/Selection
• UART, 9600 BAUD
• USB V2.0 Compliant, Full Speed
- HID-GENERIC
- HID-MOUSE
- HID-DIGITIZER
Package Types
The device will be offered in the following packages:
• 20-Lead QFN (5 x 5 mm)
• 20-Lead SOIC
• 20-Lead SSOP
2011 Microchip Technology Inc.
Preliminary
DS41606A-page 3
AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
Table of Contents
1.0 Device Overview .......................................................................................................................................................................... 5
2.0 Implementation – Quick Start ....................................................................................................................................................... 7
3.0 Hardware...................................................................................................................................................................................... 9
4.0 Communication) ......................................................................................................................................................................... 13
5.0 Commands ................................................................................................................................................................................. 19
6.0 Configuration Registers .............................................................................................................................................................. 23
7.0 Operation.................................................................................................................................................................................... 27
8.0 Boot Loader................................................................................................................................................................................ 31
9.0 EEPROM Map............................................................................................................................................................................ 35
10.0 Electrical Specifications.............................................................................................................................................................. 37
11.0 Packaging Information................................................................................................................................................................ 39
Appendix A: Revision History............................................................................................................................................................... 49
Appendix B: Device Differences........................................................................................................................................................... 49
Index .................................................................................................................................................................................................... 51
The Microchip Web Site ....................................................................................................................................................................... 53
Customer Change Notification Service ................................................................................................................................................ 53
Customer Support ................................................................................................................................................................................ 53
Reader Response ................................................................................................................................................................................ 54
Product Identification System............................................................................................................................................................... 55
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DS41606A-page 4
Preliminary
2011 Microchip Technology Inc.
AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
1.0
OVERVIEW
Resistive touch provides the advantages of easy
integration, low total system cost and acceptance of
finger, glove or stylus input, and USB communication is
the industry standard for attaching peripherals to a
computer. The AR1100 is an easy-to-integrate touch
screen controller that meets all of these needs in a
single-chip solution or production ready-board product.
The device comes with free drivers for most major
operating systems, making it easy for designers to
quickly create low-risk touch interface solutions.
The Microchip mTouch
TM
AR1100 Analog Resistive
USB and RS-232 Touch Screen Controller represents
a feature-rich, fully-integrated universal touch screen
controller solution. The AR1100 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. The AR1100 dynamically adapts to the
various touch screen electrical characteristics such as
sensitivity, contact resistance, and capacitance to
provide optimal performance with minimal design time.
Building on the AR1000 series, the new AR1100 offers
customers an easy-to-integrate solution for low-cost,
high-performing resistive touch with the advantages of
USB plug and play, support for USB mouse or digitizer,
advanced touch response and accuracy, field flash
updatability, and free drivers for most operating sys-
tems to enable low risk designs for a wide variety of
touch sensing requirements.
The AR1100 supports large displays like industrial con-
trols, self-service kiosks, and POS terminals, as well as
smaller tablet displays, handheld consumer devices,
and medical devices.
1.1
Applications
The AR1100 is suitable for any application that requires
fast, accurate and reliable integration of touch –
including, but not limited to:
•
•
•
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•
•
•
•
Mobile communication devices
Personal Digital Assistants (PDA)
Global Positioning Systems (GPS)
Touch Screen Monitors
KIOSK
Media Players
Portable Instruments
Point of Sale Terminals
FIGURE 1-1:
BLOCK DIAGRAM
2011 Microchip Technology Inc.
Preliminary
DS41606A-page 5
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