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8051 MCU Support

Driving Futuristic Human-Machine Interface Concepts Using Atmel Solutions


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Industry's first automotive touchscreen controller supporting shieldless sensors and gloved operation

The Atmel® maXTouch® family, known for its superior performance and rich feature set, is now qualified for automotive applications, such as automotive touchscreens and touchpads (supporting 2 inches up to 14 inches in diameter) used in center stack displays, navigation systems, radio human-machine interfaces (HMIs) and rear-seat entertainment systems.

maXTouch devices provide unlimited touch identification, fast response time, exacting precision, robust operation and low power consumption to touch-based designs.

The mXT134E and mXT224E automotive-qualified family members provide dedicated functionalities that meet specific automotive requirements such as high-temperature behavior and reliable operation in harsh environments.

The mXT768E and mXT540E automotive-qualified family members combine these functionalities with the ability to design single-layer shieldless sensors, thus reducing system complexity, cost and power consumption.

The mXT336S and mXT224S automotive-qualified family members comprise excellent performance, a rich feature set, single-layer shieldless designs plus gloved operation. In addition they support a high voltage option that allows for doubling the SNR ratio.

The mXT1664S and mXT1188S automotive-qualified family members bring all the aforementioned features into applications up to 14" in diameter.

Embedded filters realized in hardware and firmware enable touchscreens supporting gloved finger operation―a key requirement in modern automotive HMI interfaces. Embedded single- and dual-gesture algorithms and the palm suppression functionality allow detection and suppression of unintended touches, such as a resting hand on the screen.

Key Features

  • mXT540E and mXT768E: fully automotive-qualified (Grade 2), operating within the temperature range of -40 degrees Celsius up to +105 degrees Celsius
  • mXT143E and mXT224E: fully automotive-qualified (Grade 3), operating within the temperature range of -40 degrees Celsius up to +85 degree Celsius
  • mXT336S and mXT224S: fully automotive-qualified (Grade 3), operating within the temperature range of -40 degrees Celsius up to +85 degree Celsius
  • mXT1664S and mXT1188S: fully automotive-qualified (Grade 3), operating within the temperature range of -40 degrees Celsius up to +85 degree Celsius
  • Support single layer, shieldless sensors
  • High signal-to-noise ratio (80:1), enabling gloved-hand operation
  • Embedded single- and dual-touch gesture post processing (pinch, stretch, etc.); unintended touches such as a resting hand on the screen are classified and rejected
  • Up to 280Hz scan speed, which supports character recognition for alphanumeric inputs to the automotive HMIs
  • Lower system cost, lower power consumption and higher product yield

 
Device
Description

The mXT143E addresses small-sized touchscreens and pads. Qualified for automotive from -40°C to +85°C, it supports configurable X- and Y-lines, gloved operation and the suppression of unintended touches.

The mxT224E addresses medium-sized touchscreens of up to 6 inches in diameter. Qualified for automotive from -40°C to +85°C, it supports configurable X- and Y-lines, gloved operation and the suppression of unintended touches.

The mXT224S addresses smaller touchscreens and touchpads with a size of 5-6 inches in diameter. Qualified for automotive from -40°C to +85°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.

The mXT336S is optimized for 7-inch touchscreens in diameter. Qualified for automotive from -40°C to +85°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.

The mXT540E addresses medium-sized touchscreens of up to 9 inches in diameter. Qualified for automotive from -40°C to +105°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.

The mXT768E addresses medium-sized touchscreens of up to 12 inches in diameter. Qualified for automotive from -40°C to +105°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.

The mXT1664S is optimized for touchscreens up to 12 inches in diameter. Qualified for automotive from -40°C to +85°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.

The mXT1664S is optimized for touchscreens up to 14 inches in diameter. Qualified for automotive from -40°C to +85°C, it supports shieldless sensors and gloved operation. It embeds sophisticated filter algorithms, gestures and suppression of unintended touches.