Capacitive Touchscreen Display Reference Design


Design files


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.


  • 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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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDR805.PDF (50 K)

Detailed schematic diagram for design layout and components

TIDR807.ZIP (19 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDR806.ZIP (472 K)

Files used for 3D models or 2D drawings of IC components


Includes TI products in the design and potential alternatives.

Arm-based processors

AM4376Sitara processor: Arm Cortex-A9, PRU-ICSS

Data sheet: PDF | HTML
Arm-based processors

AM4377Sitara processor: Arm Cortex-A9, PRU-ICSS, EtherCAT

Data sheet: PDF | HTML
Arm-based processors

AM4378Sitara processor: Arm Cortex-A9, PRU-ICSS, 3D graphics

Data sheet: PDF | HTML
Arm-based processors

AM4379Sitara processor: Arm Cortex-A9, PRU-ICSS, EtherCAT, 3D graphics

Data sheet: PDF | HTML
Inverting buffers & drivers

SN74LVC1G04Single 1.65-V to 5.5-V inverter

Data sheet: PDF
LCD & OLED display power & drivers

TPS651054-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim, Fault & VCOM

Data sheet: PDF | HTML

Related design resources

Software development

LINUXEZSDK-SITARA Linux EZ Software Development Kit (EZSDK) for Sitara™ Processors

Support & training

TI E2E™ forums with technical support from TI engineers

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