AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER AR1000 Series Resistive Touch Screen Controller Special Features Touch Sensor Support RoHS Compliant 4-Wire, 5-Wire and 8-Wire Analog Resistive Power-Saving Sleep mode Lead-to-Lead Resistance: 50-2,000 typical) Industrial Temperature Range Layer-to-Layer Capacitance: 0-0.5 F Built-in Drift Compensation Algorithm Touch Sensor Time Constant: 500 s (maximum) 128 Bytes of User EEPROM Touch Resolution Power Requirements 10-bit Resolution (maximum) Operating Voltage: 2.5-5.0V 5% Standby Current: Touch Coordinate Report Rate - 5V: 85 A, typical 125 A (maximum) - 2.5V: 40 A, typical 60 A (maximum) 140 Reports Per Second (typical) with a Touch Operating No touch Current: Sensor of 0.02 F with 200 Layers - 3.0 mA (typical) Actual Report Rate is dependent on the Touch Operating Touch Current: Sensor used - 17 mA, typical, with a touch sensor having 200 layers Communications - Actual current is dependent on the touch SPI, Slave mode, p/n AR1021 sensor used 2 AR1011/AR1021 Brown-Out Detection (BOR) set I C, Slave mode, p/n, AR1021 to 2.2V UART, 9600 Baud Rate, p/n AR1011 Touch Modes Off, Stream, Down, Up and more. 2009-2016 Microchip Technology Inc. DS40001393C-page 1AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER Table of Contents 1.0 Device Overview .......................................................................................................................................................................... 3 2.0 Basics of Resistive Sensors ......................................................................................................................................................... 5 3.0 Hardware...................................................................................................................................................................................... 9 2 4.0 I C Communications .................................................................................................................................................................. 14 5.0 SPI Communications.................................................................................................................................................................. 18 6.0 UART Communications.............................................................................................................................................................. 22 7.0 Touch Reporting Protocol ........................................................................................................................................................... 23 8.0 Configuration Registers.............................................................................................................................................................. 24 9.0 Commands ................................................................................................................................................................................. 30 10.0 Application Notes ....................................................................................................................................................................... 39 11.0 Electrical Specifications.............................................................................................................................................................. 45 12.0 Packaging Information................................................................................................................................................................ 47 Appendix A: Data Sheet Revision History............................................................................................................................................ 57 Appendix B: Device Differences........................................................................................................................................................... 58 The Microchip Website......................................................................................................................................................................... 59 Customer Change Notification Service ................................................................................................................................................ 59 Customer Support................................................................................................................................................................................ 59 TO OUR VALUED CUSTOMERS It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip products. 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