Page 30

EETE FEB 2016

Touch Pad and Touch Screen Controllers Touch Pad and Touch Screen Controllers Microchip offers a broad portfolio of touch solutions for touch screen and touch pad applications that make it easy for designers to integrate touch-sensing interfaces. ■ High-fl exibility • We offer both turnkey and source code touch solutions with options to integrate touch sensing with application code on a single low-cost MCU ■ Sophisticated • Advanced touch solutions use sophisticated proprietary touch decoding algorithms to send your application fully processed and reliable touch coordinates ■ Easy Integration • Add touch technology to your application without extensive development time, risk or cost • On-board surface gesture detection (multi-fi nger scroll, swipes, tap events, etc.) allow even GPIObased integration • Lowest power Projected Resistive and Capacitive Touch Solutions Microchip offers both projected capacitive and resistive touch solutions to allow you to choose the best fit for your design. Each offers different advantages: Analog Resistive ■ Low-cost sensors that accept fi nger, glove or stylus inputs ■ Ease of manufacturing and integration Projected Capacitive ■ Glass front sensor construction provides high durability, good optics and light touch ■ Multi-touch capability which enables gestures Touch Sensing Technology Comparison Analog Resistive Projected Capacitive Cost for screen < 6" Lowest Low Cost for screen > 10" Lowest High Optics 75% 90% Screen Life Good Better Ease of Integration Easy Moderate Multi-Touch Limited Yes Touch Object Finger, Stylus/ Glove Finger Resistive Technology Overview How It Works Two conductive coated polyester layers are separated by a spacer layer. When touched, the top (flex) layer moves past the spacer layer and contacts the bottom (stable) layer. The point of contact creates a voltage divider in the X and Y directions. AR1000 Resistive Touch Advantages ■ Proven plug-and-play design ■ Eliminates all host processing of touch data ■ Built in decoding and advanced fi ltering ■ Low system power—wake on touch ■ Universal, supports all 4-, 5-, and 8-wire sensors ■ SPI, I2C, UART or USB Interfaces ■ Free drivers for most major platforms Development Tools for Resistive Touch Microchip provides fully functional hardware and featurerich GUIs to quickly get started using AR1000 resistive touch controllers for a turnkey, cost effective solution. mTouch AR1100 Development Kit (DV102012) mTouch AR1000 Development Kit (DV102011) 4 Touch and 3D Gesture Control


EETE FEB 2016
To see the actual publication please follow the link above