Design Con 2015

Atmel brings gloved-touch controllers to autos

October 17, 2012

Bernard Cole-October 17, 2012

Atmel Corp. has just released a version of its maXTouch microcontrollers for in-car control systems. Volume quantities will be available by the end of October 2012. Demo kits for both devices are also available.

The mXT143E and mXT224E touch controllers are designed for small automotive touchscreens and touchpads up to 7 inches in diameter such as center stack displays, navigation systems, radio human-machine interfaces (HMIs) and rear-seat entertainment systems.

With a high signal-to-noise ratio of 80:1, the devices are targeted at very noisy environments. They provide full support for gloved hand operation on automotive touchscreens and pads.

The mXT143E and mXT224E embed X/Y position calculation as well as post-processing algorithms such as eliminating unintended touches. With touchscreens and pads based on these new maXTouch controllers, users can perform multi-touch gestures (pinch, stretch, etc.), while unintended touches, such as a resting hand on the screen, are rejected.

The devices feature true 12-bit touch functionality with independent X/Y tracking for up to 10 concurrent touches in real–time, allowing for the highest linearity and accuracy. Adaptation to high-resolution displays is easy and quick. The user-configurable ratio of X and Y lines supports a variety of aspect ratios from 4:3 to 16:9.

Samples of automotive-qualified mXT143E and mXT224E touch controllers are available now in TQFP48 packages. Mass production will start the end of October 2012. Demo kits for both devices are also available.

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