AR1020-I/SS Microchip Technology Inc., AR1020-I/SS Datasheet
AR1020-I/SS
Specifications of AR1020-I/SS
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AR1020-I/SS Summary of contents
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AR1000 Series Resistive Touch Screen Controller DS41393A ...
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Touchscreen Controller Products Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates your responsibility to ensure that your application meets with your specifications. ...
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TABLE OF CONTENTS 1 GENERAL.............................................................................................................................................. 1 2 FEATURES............................................................................................................................................ 1 3 APPLICATIONS..................................................................................................................................... 2 4 ORDERING............................................................................................................................................ 2 5 BLOCK DIAGRAM ................................................................................................................................. 2 6 PIN DIAGRAM ....................................................................................................................................... 3 7 FUNCTIONAL DESCRIPTION .............................................................................................................. 4 7 ..............................................................................................................................................4 AIN CHEMATIC 7 ...........................................................................................................................................4 ...
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BASICS OF RESISTIVE SENSORS ................................................................................................... 25 8.1 T ................................................................................................................................................25 ERMINOLOGY 8.2 G .......................................................................................................................................................25 ENERAL 8.3 4-W S .............................................................................................................................................26 IRE ENSOR 8.4 8-W S .............................................................................................................................................27 IRE ENSOR 8.5 5-W S .............................................................................................................................................28 IRE ENSOR 8.6 S ......................................................................................................................................................28 UMMARY 9 ELECTRICAL SPECIFICATIONS........................................................................................................ ...
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... Calibration corrected coordinate option Built-in touch modes Communication Control AR1010 supports UART communication. AR1020 supports I2C and SPI communication. See Communication Interface section. © 2009 Microchip Technology, Inc. Touch Sensor Support: • 4 wire, 5 wire, and 8 wire analog resistive • Lead to Lead Resistance: 50Ω to 2,000Ω ...
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... AR1010-I/ML UART AR1010-I/SO UART AR1010-I/SS UART AR1010T-I/ML UART AR1010T-I/SO UART AR1010T-I/SS UART 2 AR1020-I/ML I C/SPI 2 AR1020-I/SO I C/SPI 2 AR1020-I/SS I C/SPI 2 AR1020T-I/ML I C/SPI 2 AR1020T-I/SO I C/SPI 2 AR1020T-I/SS I C/SPI Table 1: Ordering Part Numbers 5 BLOCK DIAGRAM Figure 1: Block Diagram DS41393A-Page 2 Temp Range Pin Package –40ºC to +85ºC QFN, 20 pin – ...
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PIN DIAGRAM Figure 2 : Pin Diagrams – SOIC / SSOP and QFN Packages Pin Name SOIC, SSOP VDD SY WAKE 5 SIQ 6 SY SDO SCK/SCL/TX ...
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... ESD protection is shown in the reference design, but acceptable protection is dependent on your specific application. Ensure your ESD solution meets your design requirements. DS41393A-Page 4 Description Manufacturer 10uF, 20%, 6.3V, X7R, 0603 AVX AVX AVX NXP Yageo America Microchip © 2009 Microchip Technology, Inc. Part Number 06036D106MAT2A 0603YC104KAT2A 06035C103KAT2A PESD5V0S1BA RC0603JR-0720KL AR1010 or AR1020 ...
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Sensor Selection The desired sensor type of 4/8-Wire or 5-Wire is hardware selectable using pin M2. Type M2 pin 4/8-wire VSS 5-wire VDD Table 4 : 4/8-wire vs 5-wire Selection If 4/8-wire has been hardware selected, ...
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Touch Sensor Interface Sensor tail pin-outs can vary by manufacturer and part number. Ensure sensor tail pins for one pair of diagonally related sensor corners are connected to the controller’s X–/X+ pins and the tail pins for the ...
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Touch Sensor Interface Sensor tail pin-outs can vary by manufacturer and part number. Ensure both sensor tail pins for one sensor axis (layer) are connected to the controller’s X–/X+ pins and the tail pins for the other sensor ...
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... The desired communication type is hardware selectable by chip part number and using pin M1. Type Chip P/N M1 pin AR1020 VSS SPI AR1020 VDD UART AR1010 VDD Table 5 : Communication Selection The communication interface pins are shown below for each communication type. Type Communication Pins UART ...
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Figure Timing Diagram – Touch Report Protocol 2 Figure Timing Diagram – Command Protocol 7.7.2 SPI SPI operates in slave mode with an idle low SCK and data transmitted on the ...
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Figure 12 : SPI Timing Diagram – Touch Report Protocol Figure 13 : SPI Timing Diagram – Command Protocol 7.7.3 UART The SDO pin is not used and must be left as a “no connect”. Do NOT tie it directly ...
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ESD Considerations ESD protection is shown on the 4-wire, 5-wire, and 8-wire interface applications schematics. The capacitance of alternate ESD diodes may adversely affect touch performance. A lower capacitance is better. The PESD5V0S1BA parts shown in the reference design ...
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Configuration Registers The Configuration Registers allow application specific customization of the controller. The default values have been optimized for most applications and are automatically used, unless you choose to change them. Unique sensors and/or product applications may benefit from ...
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SamplingFast Register (offset 0x04) The SamplingFast register sets the level of touch measurement sample averaging, when touch movement is determined to be fast. See the SpeedThreshold register for information on the touch movement threshold. A lower value will provide ...
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SleepDelay Register (offset 0x0A) The SleepDelay register sets the time duration with no touch or command activity that will cause the controller to enter a low power sleep mode. Valid values are as follows. 0 ≤ SleepDelay ≤ 255 ...
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TouchMode Register (offset 0x0C) The TouchMode register configures the action taken for various touch states. There are three states of touch for which the controller touch reporting action can be independently controlled. Touch States: 1) Pen down (initial touch) ...
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TouchOptions Register (offset 0x0D) The TouchOptions register contains various “touch” related option bits Readable bit Writable bit Unimplemented bit read as ‘0’ U–0 U–0 U–0 – – – Bit 7 bit 7-2 Unimplemented: ...
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PenStateReportDelay Register (offset 0x0F) The PenStateReportDelay register sets the delay time between sending of sequential touch reports for the “Pen Down” and “Pen Up” touch mode states. See TouchMode Register section for touch modes. For example, if “Pen Up” ...
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Command Response A received command will be responded to as follows. <Header><DataSize><Response><Command><Data>…<Data> <Header> is defined as a value of 0x55 and is used to mark the beginning of the response packet. <DataSize> is the number of bytes being sent ...
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Calibrate - 0x14 Enter “calibration” mode. This instructs the controller to enter a mode of accepting the next four touches as the calibration point coordinates. See section Calibration of Touch Sensor with Controller for an example. Completion of calibration ...
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How the Calibration Data is Encoded and Stored in EEPROM This section is informational only. No user action is required. The raw touch coordinates, decoded by the controller, for each of the four calibration touches are extrapolated if CalibrationInset ...
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Register Read - 0x20 Read a value from a controller register location. This can be used to determine a controller configuration setting. Configuration registers are defined as an Offset value from the Start address for the register group. Read ...
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EEPROM Read - 0x28 The controller has 256 bytes of on-board EEPROM. The first 128 bytes (address range 0x00–0x7F) are reserved by the controller for the configuration register settings and calibration data. The second 128 bytes (address ...
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Calibration of Touch Sensor with Controller The reported coordinates from a touch screen controller are typically calibrated to the application’s video display. The task is often left up to the host to perform. This controller provides a feature for ...
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Software to display the second calibration point target in the upper right quadrant of the display and prompt the user to touch and release the target. Touch and release target 10) Wait for the user to touch and release ...
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BASICS OF RESISTIVE SENSORS 8.1 Terminology ITO (Indium Tin Oxide) is the resistive coating that makes up the active area of the touch sensor. ITO is a transparent semiconductor that is sputtered onto the touch sensor layers. Flex or ...
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Sensor A 4-wire resistive touch sensor consists of a Stable and Flex layer, electrically separated by spacer dots. The layers are assembled perpendicular to each other. The touch position is determined by first applying a voltage gradient across ...
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Sensor An 8-wire resistive touch sensor consist of a Stable and Flex layer, electrically separated by spacer dots. The layers are assembled perpendicular to each other. The touch position is determined by first applying a voltage gradient across ...
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Sensor A 5-Wire resistive touch sensor consists of a flex and stable layer, electrically separated by spacer dots. The touch position is determined by first applying a voltage gradient across the stable layer in the X-axis direction and ...
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ELECTRICAL SPECIFICATIONS 9.1 Absolute Maximum Ratings Ambient temperature under bias..........................................................................................................-40° to +125°C Storage temperature ........................................................................................................................ -65°C to +150°C Voltage on VDD with respect to VSS .................................................................................................. -0.3V to +6.5V Voltage on all other pins with respect to VSS .......................................................................... ...
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PACKAGING 10.1 20 Lead SOIC Figure Lead SOIC Package DS41393A-Page 30 © 2009 Microchip Technology, Inc. ...
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Lead SSOP Figure Lead SSOP Package © 2009 Microchip Technology, Inc. DS41393A-Page 31 ...
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Lead QFN (ML) The metal plate on the package bottom can be floated, but connecting it to VSS (circuit ground) is recommended. Figure Lead QFN Package DS41393A-Page 32 © 2009 Microchip Technology, Inc. ...
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Microchip Technology, Inc. DS41393A-Page 33 ...