ATMXT640U-CCU023

mXT640U 1.1 maXTouch 640-node Touchscreen Controller Product Brief Description The mXT640U uses a unique charge-transfer acquisition engine to implement Microchip’s patented capacitive sensing method. Coupled with a state-of-the-art CPU, the entire touchscreen sensing solution can measure, classify and track a number of individual finger touches with a high degree of accuracy in the shortest response time. The mXT640U allows for both mutual and self capacitance measurements, with the self capacitance measurements being used to augment the mutual capacitance measurements to produce reliable touch information. maXTouch® Adaptive Sensing Touchscreen Technology • Up to 32 X (transmit) lines and 20 Y (receive) lines • A maximum of 640 nodes can be allocated to the touchscreen • Touchscreen size 8.17 inches (16:10 aspect ratio), assuming a sensor electrode pitch of 5.5 mm. Other sizes may be possible with different electrode pitches and appropriate sensor material • Multiple touch support with up to 16 concurrent touches tracked in real time • Dual-boot OS support for Microsoft® Windows® and Android Touch Sensor Technology • Discrete/out-cell support including glass and PET filmbased sensors • On-cell/touch-on display support including TFT, IPS and OLED • Synchronization with display refresh timing capability • Support for standard (for example, Diamond) and proprietary sensor patterns (review of designs by Microchip recommended) Front Panel Material • Works with PET or glass, including curved profiles (configuration and stack-up to be approved by Microchip) • Glass 0.4 mm to 4.5 mm, dependent on screen size, touch size and stack-up • Plastic 0.2 mm to 2.2 mm, dependent on screen size, touch size and stack-up Touch Performance • Moisture/Water Compensation - No false touch with condensation or water drop up to 22 mm diameter - One-finger tracking with condensation or water drop up to 22 mm diameter 2017 Microchip Technology Inc. • Glove Support - Multiple-finger glove touches up to 1.5 mm thickness (subject to stack-up design) - Single-finger glove touch up to 5 mm thickness (subject to stack-up design) • Mutual capacitance and self capacitance measurements supported for robust touch detection • Noise suppression technology to combat ambient, charger noise, and power-line noise - Up to 240 Vpp between 1 Hz and 1 kHz sinusoidal waveform - Up to 20 Vpp between 1 kHz and 1 MHz sinusoidal waveform • Stylus Support - Supports passive stylus with 1 mm contact diameter, subject to configuration, stack up, and sensor design • Scan Speed - Up to 250 Hz one finger reporting rate, subject to configuration - Typical report rate for 10 touches 100 Hz (subject to configuration) - Initial touch latency