Microchip ATMXT2912TD-UW Manual
Microchip
Ikke kategoriseret
ATMXT2912TD-UW
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2023 Microchip Technology Inc. and its subsidiaries Product Brief DS40002460A-page 1
mXT2912TD-AxUW 1.1
Description
The mXT2912TD-AxUW 1.1 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 mXT2912TD-AxUW 1.1
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.
Automotive Applications
maXTouch® Adaptive Sensing Technology
Keys
Touch Sensor Technology
• On-cell/touch-on display support including OLED and
LCD (ITPS, IPS)
• Discrete/out-cell support including glass and PET film-
based sensors
• Synchronization with display refresh timing capability
• Support for standard (for example, Diamond) and
proprietary sensor patterns (review of designs by
Microchip or a Microchip-qualified touch sensor
module partner is recommended)
Front Panel Material and Design
• Support for non-rectangular sensor designs (for
example, circular, rounded or with cutouts)
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
• Mutual capacitance and self capacitance
measurements supported for robust touch detection
• P2P mutual capacitance measurements supported for
extra sensitive multi-touch sensing
• Noise suppression technology to combat ambient and
power-line noise
• AEC-Q100 Qualified
• CISPR 25 compliant (for both mutual and self
capacitance measurements)
• Microchip has patents related to the Ultrawide Touch
technology. The touch sensor, which will be developed
by the customer, its partners, and/or Microchip for
Ultrawide touch programs, can only be part of a touch
solution that incorporates a Microchip touchscreen
controller to implement the relevant functionality.
• Single ultrawide touchscreen up to 20 X lines by
142 Y lines, made up of 40 X by 71 Y in a multiplexed
arrangement (subject to configuration)
• Touchscreen size 34 inches (7:1 aspect ratio),
assuming a sensor electrode pitch of 6 mm. Other
sizes are possible with different electrode pitches and
appropriate sensor material. Other sizes are possible
with different electrode pitches and appropriate sensor
material
• Multiple touch support with up to 16 concurrent
touches tracked in real time
• Up to 32 nodes can be allocated as mutual
capacitance sensor keys in addition to the
touchscreen, defined as 2 key arrays (subject to
availability of X and Y lines and other configurations)
• Adjacent Key Suppression (AKS) technology is
supported for false key touch prevention
• Works with PET or glass, including curved profiles
(configuration and stack-up to be approved by
Microchip or a Microchip-qualified touch sensor
module partner)
• 10 mm glass (or 5 mm PMMA) with bare finger
(dependent on sensor size, touch size, configuration
and stack-up)
• 6 mm glass (or 3 mm PMMA) with multi-nger 5 mm
glove (2.7 mm PMMA equivalent) (dependent on
sensor size, touch size, configuration and stack-up)
- Up to 240 VPP between 1 Hz and 1 kHz sinusoidal
waveform (no touches)
- Up to 20 VPP between 1 kHz and 1 MHz
sinusoidal waveform
maXTouch 2911-node Touchscreen Controller
Product Brief
mXT2912TD-AxUW 1.1
DS40002460A-page 2 Product Brief 2023 Microchip Technology Inc. and its subsidiaries
• Burst Frequency
- Flexible and dynamic Tx burst frequency selection to reduce EMC disturbance
- Configurable Tx waveform shaping to reduce emissions
• Scan Speed
- Typical report rate for 10 touches 80 Hz (subject to configuration)
- Initial touch latency <20 ms for first touch from idle (subject to configuration)
- Configurable for power and speed optimization
• Touch panel failure detection
- Automatic touch sensor diagnostics during run time to support the implementation of safety critical features
- Diagnostics reported using dedicated output pin or by standard Object Protocol messages
- Configurable test limits
On-chip Gestures
• Reports one-touch and two-touch gestures
Enhanced Algorithms
• Lens bending algorithms to remove display noise
• Touch suppression algorithms to remove unintentional large touches
• 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
• 64-byte data area for user’s 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
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
Application Interfaces
Package
• 176-lead LQFP 24 × 24 × 1.4 mm, 0.5 mm pitch
Operating Temperature
Design Services
• Review of device configuration, stack-up and sensor patterns
• Client interface for main communication with the device. Can be one of:
- I2C interface, with support for Standard mode (up to 100 kHz), Fast mode (up to 400 kHz),
Fast-mode Plus (up to 1 MHz)
- SPI 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
• ATMXT2912TD-ATUW: –40C to +85C (Grade 3)
• ATMXT2912TD-ABUW: –40C to +105C (Grade 2)
Produkt Specifikationer
| Mærke: | Microchip |
| Kategori: | Ikke kategoriseret |
| Model: | ATMXT2912TD-UW |
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