Touchscreen controller reduces integration complexity, cost

April 20, 2021 // By Christoph Hammerschmidt
Touchscreen controller reduces integration complexity, cost
To better meet the need for safe, intuitive user interfaces within automotive vehicles, designers are continuing to consolidate the vehicle’s cluster, center stack and co-driver displays into very wide screens. With its its maXTouch MXT2912TD-UW touchscreen controller, Microchip is addressing the demand for controllers for very large touchscreens.

Streamlining and simplifying system development for these ultrawide screens often seen in electric vehicles (EVs), advanced driver-assistance systems (ADAS) and premium vehicles, Microchip Technology Inc. (Nasdaq: MCHP) today announced its maXTouch MXT2912TD-UW touchscreen controller. According to Microchip, this is the industry’s first automotive-qualified, single-chip solution that addresses display sizes up to 45 inches with a very wide aspect ratio, supporting liquid-crystal display (LCD) and organic light emitting diode (OLED) display technologies.

The product at hand reduces the need for multiple touch controllers within a vehicle’s human machine interface (HMI) display. This single-chip touch controller provides the highest report rate for wide displays and is independent of the display resolution, helping achieve a comparable user experience that has become accustomed with the smart phone. Also supported by the exceptional maXTouch family’s intrinsic Signal-to-Noise Ratio (SNR), the MXT2912TD-UW enables detection and tracking of multi-finger thick gloves through a wide variety of overlay materials and thicknesses, even in the presence of moisture.

Driven by the ISO 26262 specification for functional safety in road vehicles, the MXT2912TD-UW contains a variety of safety related features, simplifying the display module system’s path to functional safety certification. These include periodic self-test, touch sensor test, internal flash and RAM tests, full signal data path integrity checks and additional microprocessor (MPU) core testing. The embedded firmware is developed to Automotive SPICE processes.

Software support includes Microchip’s maXTouch Studio development tool and maXTouch Analyzer inspection tool for production line testing.

The MXT2912TD-UW is available in volume production.

 

 


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