mXT640U 1.1 maXTouch 640-node Touchscreen Controller Product Brief Description The mXT640U uses a unique charge-transfer acquisition engine to implement Microchips 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. Glove Support maXTouch Adaptive Sensing Touchscreen - Multiple-finger glove touches up to 1.5 mm Technology thickness (subject to stack-up design) Up to 32 X (transmit) lines and 20 Y (receive) lines - Single-finger glove touch up to 5 mm thickness A maximum of 640 nodes can be allocated to the (subject to stack-up design) touchscreen Mutual capacitance and self capacitance Touchscreen size 8.17 inches (16:10 aspect ratio), measurements supported for robust touch detection assuming a sensor electrode pitch of 5.5 mm. Other Noise suppression technology to combat ambient, sizes may be possible with different electrode pitches charger noise, and power-line noise and appropriate sensor material - Up to 240 Vpp between 1 Hz and 1 kHz Multiple touch support with up to 16 concurrent sinusoidal waveform touches tracked in real time - Up to 20 Vpp between 1 kHz and 1 MHz Dual-boot OS support for Microsoft Windows and sinusoidal waveform Android Stylus Support Touch Sensor Technology - Supports passive stylus with 1 mm contact diameter, subject to configuration, stack up, and Discrete/out-cell support including glass and PET film- sensor design based sensors Scan Speed On-cell/touch-on display support including TFT, IPS and OLED - Up to 250 Hz one finger reporting rate, subject to configuration Synchronization with display refresh timing capability - Typical report rate for 10 touches 100 Hz Support for standard (for example, Diamond) and (subject to configuration) proprietary sensor patterns (review of designs by Microchip recommended) - Initial touch latency <20 ms for first touch from idle, subject to configuration Front Panel Material - Configurable to allow for power and speed Works with PET or glass, including curved profiles optimization (configuration and stack-up to be approved by On-chip Gestures Microchip) Glass 0.4 mm to 4.5 mm, dependent on screen size, Supports wake up/unlock gestures, including symbol touch size and stack-up recognition Plastic 0.2 mm to 2.2 mm, dependent on screen size, Keys touch size and stack-up Up to 32 nodes can be allocated as mutual Touch Performance capacitance sensor keys (subject to other configurations) Moisture/Water Compensation Support for 3 Generic Keys in addition to the - No false touch with condensation or water drop up touchscreen array (subject to other configurations) to 22 mm diameter Adjacent Key Suppression (AKS) technology is - One-finger tracking with condensation or water supported for false key touch prevention drop up to 22 mm diameter 2017 Microchip Technology Inc. Product Brief DS400001942A-page 1 MXT640U 1.1 Enhanced Algorithms Lens bending algorithms to remove display noise Touch suppression algorithms to remove unintentional large touches, such as palm Palm Recovery Algorithm for quick restoration to normal state Product Data Store Area Up to 32 bytes of user-defined data can be stored during production Power Saving Programmable timeout for automatic transition from active to idle states Pipelined analog sensing detection and digital processing to optimize system power efficiency Application Interfaces 2 I C-compatible slave mode: Standard/Fast mode 400 kHz, Fast-mode Plus 1 MHz, High-speed mode up to 3.4 MHz 2 HID-I C interface for Microsoft Windows 8.x and later versions Interrupt to indicate when a message is available SPI Debug Interface to read the real-time raw data for tuning and debugging purposes Power Supply Digital (Vdd) 3.3 V nominal Digital I/O (VddIO) 3.3 V nominal Analog (AVdd) 3.3 V nominal High voltage internal X line drive (XVdd) 6.6 V with internal voltage pump High voltage internal X line drive (XVdd) 9.9 V with internal voltage pump Packages 88-ball UFBGA 6 6 0.6 mm, 0.5 mm pitch 88-ball X1FBGA 6 6 0.45 mm, 0.5 mm pitch Operating Temperature 40 C to +85C DS400001942A-page 2 Product Brief 2017 Microchip Technology Inc.