Touch Panel

Microchip unveils new automotive touchscreen controller

01 December 2021

Microchip Technology Inc. has introduced a touchscreen controller for the automotive market to allow OEMs to customize touch panels for aspect ratios.

The MXT1296M1T can be configured for driving and receiving touch channels to match the exact screen format including popular 8:3 automotive aspect ratio. The feature allows OEMs to use the number of touch channels available without the need for a larger, more expensive touch controller, Microchip said.

The MXT1296M1T can be configured for driving and receiving touch channels to match the exact screen format including popular 8:3 automotive aspect ratio. Source: MicrochipThe MXT1296M1T can be configured for driving and receiving touch channels to match the exact screen format including popular 8:3 automotive aspect ratio. Source: MicrochipAdditionally, the controller provides functional safety support, something requested by OEMs.

Validation time and resources can be saved by reusing a common PCB design to support different touch sensor aspect ratios and the controller enables the sensor channel reconfiguration by parameters.

The touchscreen controller offers two communication interfaces operating simultaneously, bridging the connection to the back channel of the LVDS video link for touch information and a connection to a local microcontroller. The bridgeless topology reduces touch latency to improve the user experience.

When connected to a local MCU, the second interface offers:

A redundancy link to the head unit through a CAN bus or 10BASE-T1S automotive Ethernet link for increased functional safety at the system level.

Local access and control of the maXTouch touchscreen controller’s features such as a capacitive keys report, live touch sensor diagnostics and raw data for external and custom post-processing.

Over-the-air and secure firmware update capability using Microchip’s TrustAnchor100 companion chip.

To contact the author of this article, email engineering360editors@globalspec.com


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