Capacitive touchscreen display reference design

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 800×480 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.

Parts Include :
AM4376   Sitara Processor
AM4377   Sitara Processor
AM4378   Sitara Processor
AM4379   Sitara Processor
SN74LVC1G04    Single Inverter
TPS61081   27V, 1.2A switch, 1.2MHz Boost Converter with integrated power diode
TPS65105   4-CH LCD Bias w/ Fully Int. Pos. Charge Pump, 3.3V LDO Contr., 0.96A Min. Boost Ilim, Fault & VCOM

Learn more by downloading the reference design below