Capacitive Touchscreen Display Reference Design

(ACTIVE) TIDEP0015

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Description

Capacitive touchscreen displays generally provide a higher quality and better user experience than traditional resistive touchscreen displays. This reference design shows how to interface a capacitive touchscreen display to the Sitara AM437x processors. The display has an integrated touchscreen controller that interfaces with the AM437x via its I2C port.

 

Features
  • Color 7-Inch TFT LCD panel with capacitive touch user interface
  • WVGA 800x480 pixel resolution with 24-bit RGB interface
  • LCD interface connected to the integrated DSS (Display Sub-System) of the Sitara AM437x processor
  • Capacitive Touch Screen connected to the Sitara AM437x processor over I2C
  • 27 white LED's for backlight controlled TPS61081 PWM controlled LED driver
  • The required power for the LCD is provided by the TPS65105 Linear regulator supply.
  • Complete sub-system reference with schematics, BOM, design files, and HW User's Guideimplemented on a fully assembled board developed for testing and validation.

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Schematic/Block Diagram

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Design Guide

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Design Files

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Bill of Materials (BOM)

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TIDEP0015:
Capacitive Touchscreen Display Reference Design


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TI Devices (7)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AM4376  Sitara Processor: Arm Cortex-A9, Secure Boot, PRU-ICSS  Arm Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4377  Sitara Processor: Arm Cortex-A9, Secure Boot, PRU-ICSS, EtherCAT  Arm Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4378  Sitara Processor: Arm Cortex-A9, Secure Boot, PRU-ICSS, 3D graphics  Arm Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
AM4379  Sitara Processor: Arm Cortex-A9, Secure Boot, PRU-ICSS, EtherCAT, 3D graphics  Arm Cortex-A9  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC1G04  Single Inverter  Buffer/driver  Sample & Buy View Design Kits & Evaluation Modules
TPS61081  27V, 1.2A switch, 1.2MHz Boost Converter with integrated power diode  LED drivers  Sample & Buy View Design Kits & Evaluation Modules
TPS65105  4-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim, Fault & VCOM  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
AM4376 Download -
AM4377 Download -
AM4378 Download -
AM4379 Download -
SN74LVC1G04 Download -
Download Download
Download Download
Download
Download Download
Download -
Download
Download Download
TPS61081 Download Download
TPS65105 Download Download
Download Download

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Step 2: Download the Symbol and Footprint from the CAD.bxl file table.


Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 637 04 Jun 2014 338
Design files (3)
Title Abstract Type Size (KB) Date Views
ZIP 19 20 Jun 2014 35
ZIP 472 20 Jun 2014 59
PDF 50 20 Jun 2014 198
Related Tools & Software

Software (1)

Name Part Number Software Type
Linux EZ Software Development Kit (EZSDK) for Sitara™ Processors  LINUXEZSDK-SITARA  Software Development Kits (SDK) 


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