Features
• maXTouch™ Touchscreen
– True 12-bit multi-touch with independent XY tracking for up to 10 concurrent
touches in real time with touch size reporting
– Up to 4.3 inch diagonal screen size supported with 10 mm “pinch” separation
– Up to 10.1 inch support with correspondingly wider “pinch”
• Number of Channels
– Up to 224 (subject to other configuration limitations)
– Electrode grid configurations up to 20 X by 10 Y lines supported (subject to 30
total pins and a maximum of 14 Y lines)
maXTouch™
224-channel
Touchscreen
Sensor IC
• maXTouch Touch Key Support
– Up to 32 channels can be allocated as fixed keys (subject to other configurations)
• Zero Additional Part Count
– 16 X by 14 Y matrix (224 channels) implementable with power bypass capacitors only
• Signal Processing
– Advanced digital filtering using both hardware engine and firmware
– Self-calibration
– Auto drift compensation
– Adjacent Key Suppression® (AKS™) technology
– Grip and face suppression
mXT224
– Reports one-touch and two-touch gestures
– Down-scaling and clipping support to match LCD resolution
– Ultra-fast start-up and calibration for best user experience
– Supports axis flipping and axis switch-over for portrait and landscape modes
• Scan Speed
Summary
– Maximum single touch >250Hz, subject to configuration
– Configurable to allow power/speed optimization
– Programmable timeout for automatic transition from active to idle states
• Response Times
– Initial latency <10 ms for first touch from idle, subject to configuration
• Sensors
– Works with PET or glass sensors
– Works with all proprietary sensor patterns recommended by Atmel®
– Works with passive stylus
• Panel Thickness
– Glass up to 3 mm, screen size dependent
– Plastic up to 1.5 mm, screen size dependent
• Interface
– I2C-compatible slave mode 400 kHz
• Dual-rail Power
– Interface 1.8V to 3.3V nominal, analog 2.7V to 3.3V nominal
• Power Consumption
Note: This is a summary document.
A complete document is available
under NDA. For more information
contact www.atmel.com/touchscreen.
– Idle 80Hz: <1.8 mW, subject to configuration
– One Touch Active 80Hz: 3.9 mW, subject to configuration
– Sleep: 4.5 µW
• Package
– 49-ball UFBGA 5 x 5 x 0.6 mm, 0.65 ball pitch
– 49-ball VFBGA 5 x 5 x 1 mm, 0.65 ball pitch
– 48-pin QFN 6 x 6 x 0.6 mm, 0.4 mm pin pitch
9530BS–AT42–10/09
