mXT2912TD-AxUW 1.0 maXTouch 2911-node Touchscreen Controller Automotive Applications Front Panel Material and Design AEC-Q100 Qualified Works with PET or glass, including curved profiles (configuration and stack-up to be approved by Level 3 Developed following Automotive SPICE Microchip or a Microchip-qualified touch sensor certified processes module partner) CISPR 25 compliant (for both mutual and self 10 mm glass (or 5 mm PMMA) with bare finger capacitance measurements) (dependent on screen size, touch size, configuration ASIL-B related FMEDA processes applied and stack-up) 6 mm glass (or 3 mm PMMA) with multi-finger 5 mm maXTouch Adaptive Sensing Touchscreen glove (2.7 mm PMMA equivalent) (dependent on Technology screen size, touch size, configuration and stack-up) Microchip has patents related to the Ultrawide Touch Support for non-rectangular sensor designs (for technology. The touch sensor, which will be developed example, circular, rounded or with cutouts) by the customer, its partners, and/or Microchip for Ultrawide touch programs, can only be part of a touch Touch Performance solution that incorporates a Microchip touchscreen Moisture/Water Compensation controller to implement the relevant functionality. - No false touch with condensation or water drop Single ultrawide touchscreen up to 20 X lines by up to 22 mm diameter 142 Y lines, made up of 40 X by 71 Y in a multiplexed - One-finger tracking with condensation or water arrangement (subject to configuration) (see drop up to 22 mm diameter Section 4.2.3 Permitted Configurations) Mutual capacitance and self capacitance Touchscreen size 34 inches (7:1 aspect ratio), measurements supported for robust touch detection assuming a sensor electrode pitch of 6 mm. Other sizes are possible with different electrode pitches and P2P mutual capacitance measurements supported for appropriate sensor material extra sensitive multi-touch sensing Multiple touch support with up to 16 concurrent Noise suppression technology to combat ambient and touches tracked in real time power-line noise between 1 Hz and 1 kHz sinusoidal - Up to 240 V PP Keys waveform between 1 kHz and 1 MHz - Up to 20 V Up to 32 nodes can be allocated as mutual PP sinusoidal waveform capacitance sensor keys in addition to the touchscreen, defined as 2 key arrays (subject to Burst Frequency availability of X and Y lines and other configurations) - Flexible and dynamic Tx burst frequency selection Adjacent Key Suppression (AKS) technology is to reduce EMC disturbance supported for false key touch prevention - Controlled Tx burst frequency drift over process and temperature range Touch Sensor Technology - Configurable Tx waveform shaping to reduce Discrete/out-cell support including glass and PET film- emissions based sensors Scan Speed On-cell/touch-on display support including TFT, LCD - Typical report rate for 10 touches 80 Hz (subject (ITPS, IPS) and OLED to configuration) Synchronization with display refresh timing capability - Initial touch latency <20 ms for first touch from idle Support for standard (for example, Diamond) and (subject to configuration) proprietary sensor patterns (review of designs by - Configurable to allow for power and speed Microchip or a Microchip-qualified touch sensor optimization module partner is recommended) On-chip Gestures Reports one-touch and two-touch gestures 2021 Microchip Technology Inc. DS40002139C-page 1 mXT2912TD-AxUW 1.0 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 Data Store 60-byte CRC-checksummed data area for use as a run-time Product Data Store Area Up to 64 bytes of users custom data (not CRC checksummed) Power Saving Programmable timeout for automatic transition from Active to Idle state Pipelined analog sensing detection and digital processing to optimize system power efficiency Application Interfaces 2 I C client interface with support for Standard mode (up to 100 kHz), Fast mode (up to 400 kHz), Fast-mode Plus (up to 1 MHz) SPI client interface (up to 8 MHz) Interrupt to indicate when a message is available Additional SPI Debug Interface to read the raw data for tuning and debugging purposes Power Supply Digital (Vdd) 3.3V nominal Digital I/O (VddIO) 3.3V nominal Analog (AVdd) 3.3V nominal High voltage external X line drive (XVdd) up to 8.5V Package 176-lead LQFP 24 24 1.4 mm, 0.5 mm pitch Operating Temperature ATMXT2912TD-ATUW: 40C to +85C (Grade 3) ATMXT2912TD-ABUW: 40 C to +105C (Grade 2) Design Services Review of device configuration, stack-up and sensor patterns Custom firmware versions can be considered Contact your Microchip representative for more information DS40002139C-page 2 2021 Microchip Technology Inc.