Human-machine interface for automotive applications has been through a number of repetitions over the past several years. Whereas many vehicles have voice-controlled interfaces, capacitive contact screens are still wildly in style for infotainment techniques.
Capacitive touch sensing is principal for touch interfaces. To fit the duty of managing these interfaces, Microchip’s maXTouch® touchscreen controller ICs for 20-inch display screens have been available since the last December.
Last week, Microchip introduced another three versions, the MXT1067TD, MXT1189TD, and MXT1665TD, that are particularly optimized for nine- to 13-inch automotive touchscreens.
The brand new touchscreen controllers permit engineers to develop programs with thick glass or plastic cover lenses that can be monitored even by operators carrying gloves. The devices will prevent water drops of as much as 22 mm from being understood as “touches.”
Developers of automotive touchscreen programs challenges face challenges in controlling EMI and ESD in the more and more electronically drenched environment of a contemporary automobile. To fulfill this demand, members of Microchip’s TD family feature a waveform shaping functionality to optimize the efficiency of the touch controller’s radiated emissions via an EMI optimization device.
Through this software, OEMs can enter the RF limits they require for their distinctive application disseminated burst waveform used for the touch sensing acquisition and tune the form of the transmitted burst waveform employed for the touch sensing acquisition.
Fanie Duvenhage, Vice President of Microchip’s Human Machine Interface business model, describes the corporate’s approach as prioritizing fast, powerful, simple design, “permitting developers to make use of the same design setting and product features” for various conditions, along with lens materials, screen sizes, and car models.