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MXT224 Datasheet, PDF (1/12 Pages) ATMEL Corporation – maXTouch 224-channel Touchscreen Sensor IC | |||
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Features
⢠maXTouch⢠Touchscreen
â True 12-bit multi-touch with independent XY tracking for up to 10 concurrent
touches in real time with touch size reporting
â Up to 4.3 inch diagonal screen size supported with 10 mm âpinchâ separation
â Up to 10.1 inch support with correspondingly wider âpinchâ
⢠Number of Channels
â Up to 224 (subject to other configuration limitations)
â 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 Touch Key Support
â Up to 32 channels can be allocated as fixed keys (subject to other configurations)
⢠Zero Additional Part Count
â 16 X by 14 Y matrix (224 channels) implementable with power bypass capacitors only
⢠Signal Processing
â Advanced digital filtering using both hardware engine and firmware
â Self-calibration
â Auto drift compensation
â Adjacent Key Suppression® (AKSâ¢) technology
â Grip and face suppression
â Reports one-touch and two-touch gestures
â Down-scaling and clipping support to match LCD resolution
â Ultra-fast start-up and calibration for best user experience
â Supports axis flipping and axis switch-over for portrait and landscape modes
⢠Scan Speed
â Maximum single touch >250Hz, subject to configuration
â Configurable to allow power/speed optimization
â Programmable timeout for automatic transition from active to idle states
⢠Response Times
â Initial latency <10 ms for first touch from idle, subject to configuration
⢠Sensors
â Works with PET or glass sensors
â Works with all proprietary sensor patterns recommended by Atmel®
â Works with passive stylus
⢠Panel Thickness
â Glass up to 3 mm, screen size dependent
â Plastic up to 1.5 mm, screen size dependent
⢠Interface
â I2C-compatible slave mode 400 kHz
⢠Dual-rail Power
â Interface 1.8V to 3.3V nominal, analog 2.7V to 3.3V nominal
⢠Power Consumption
â Idle 80Hz: <1.8 mW, subject to configuration
â One Touch Active 80Hz: 3.9 mW, subject to configuration
â Sleep: 4.5 µW
⢠Package
â 49-ball UFBGA 5 x 5 x 0.6 mm, 0.65 ball pitch
â 49-ball VFBGA 5 x 5 x 1 mm, 0.65 ball pitch
â 48-pin QFN 6 x 6 x 0.6 mm, 0.4 mm pin pitch
maXTouchâ¢
224-channel
Touchscreen
Sensor IC
mXT224
Summary
Note: This is a summary document.
A complete document is available
under NDA. For more information
contact www.atmel.com/touchscreen.
9530BSâAT42â10/09
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