MIKROE-3202

IQ Switch Azoteq ProxSense Series IQS266 DATASHEET 2x3 Channel projected capacitive trackpad controller with self-capacitive wake-up IC is a 2x3 projected capacitive trackpad designed for low power mobile The IQS266 ProxSense applications. This trackpad is perfect to implement on a single sided ITO touch screen for wearables. A self-capacitive channel is used for wake-up which keeps the power consumption in low-power less than 5 uA. Other features include automatic tuning for sense electrodes, internal reference capacitor and internal regulator to reduce total system cost. Features > Capacitive sensing x Parasitic capacitive load cancellation x Fully adjustable sensing options compliant x Self capacitive prox channel (CH0) x 2x3 Projected capacitive trackpad (CH1-6) > Zoom and Low power options for minimal power consumption > Multiple integrated UI options based on years of experience in sensing on fixed and mobile platforms: x Proximity / Touch x Proximity wake-up from low power using distributed QFN(3x3)-16 package proximity channel Representation only x Gesture recognition: ..1 Swipes: Up, down, left, right (segment indication for left & right swipes) ..2 Adjustable swipe length and time limitations ..3 Taps: Single taps with segment indication ..4 Adjustable tap size and time limitation > Automatic Tuning Implementation (ATI) > Minimal external components Available Packages 2 > Fast I C compatible interface TA QFN(3x3)-16 > RDY indication for event mode operation -20C to 85C IQS266 > Event or Streaming mode > Small package size: QFN(3x3)-16 > Supply voltage: 1.8V to 3.3V Applications > Wearables > Wake-up from standby applications > Navigational controls > Replacement for electromechanical switches and keypads > White goods and appliances > GUI trigger and GUI control proximity > Office equipment, toys, sanitary ware detection > Proximity detection that enables > Electronic Keypads or Pin pads backlighting activation (Patented) Copyright Azoteq (Pty) Ltd 2019. IQS266 Datasheet V1.09 Page 1 of 52 All Rights Reserved. Memory Map July 2019 IQ Switch Azoteq ProxSense Series Contents IQS266 DATASHEET .................................................................................................................................................... 1 INTRODUCTION .................................................................................................................................................. 5 FUNCTIONAL OVERVIEW .................................................................................................................................. 5 PACKAGING AND PIN-OUT .............................................................................................................................. 6 IQS266 PIN LAYOUT (REPRESENTATION ONLY DEVICE MARKING DIFFERS) ................................................................. 6 IQS266 PIN-OUT .......................................................................................................................................... 6 REFERENCE DESIGN ........................................................................................................................................ 7 IQS266 REFERENCE DESIGN ........................................................................................................................... 7 IQS266 RECOMMENDED TRACKPAD LAYOUT (TOP VIEW) WITH COORDINATE SYSTEM AND SEGMENT ALLOCATION ........... 7 USER CONFIGURABLE OPTIONS .......................................................................................................................... 8 PROXSETTING0 ............................................................................................................................................. 8 PROXSETTINGS1............................................................................................................................................ 9 PROXSETTINGS2............................................................................................................................................ 9 PROXSETTINGS3.......................................................................................................................................... 10 EVENT MASK ............................................................................................................................................... 11 ZOOM TIMEOUT .......................................................................................................................................... 11 HALT TIMEOUT ............................................................................................................................................ 11 RDY TIMEOUT ............................................................................................................................................ 11 NORMAL MODE (NM) PERIOD ....................................................................................................................... 11 LOW POWER (LP) PERIOD ............................................................................................................................. 12 PROXIMITY THRESHOLD CH0 ......................................................................................................................... 12 TOUCH THRESHOLDS .................................................................................................................................... 12 ATI TARGET ................................................................................................................................................ 12 BASE VALUES .............................................................................................................................................. 12 GESTURE SETTINGS ...................................................................................................................................... 13 SWIPE GESTURE REQUIREMENTS .................................................................................................................... 13 PROXSENSE MODULE ....................................................................................................................................... 13 CHARGE TRANSFER CONCEPT ......................................................................................................................... 13 RATE OF CHARGE CYCLES .............................................................................................................................. 14 IQS266 CHARGE SEQUENCE TIMING DIAGRAM............................................................................................... 14 LTA VS REFERENCE VALUES ........................................................................................................................... 14 DETERMINE TOUCH OR PROX ......................................................................................................................... 15 ATI ........................................................................................................................................................... 15 COMMUNICATION ............................................................................................................................................ 17 CONTROL BYTE ........................................................................................................................................... 17 IQS266 CONTROL BYTE............................................................................................................................. 17 2 I C READ ................................................................................................................................................... 17 CURRENT ADDRESS READ............................................................................................................................ 17 RANDOM READ ........................................................................................................................................... 17 2 I C WRITE 17 2 I C WRITE .................................................................................................................................................. 17 END OF COMMUNICATION SESSION / WINDOW ................................................................................................ 17 2 I C SUB-ADDRESS ........................................................................................................................................ 17 2 I C SUB-ADDRESS SELECTION.......................................................................................................................... 17 RDY HAND-SHAKE ROUTINE ......................................................................................................................... 18 2 I C SPECIFIC COMMANDS .............................................................................................................................. 18 Copyright Azoteq (Pty) Ltd 2019. IQS266 Datasheet V1.09 Page 2 of 52 All Rights Reserved. Memory Map July 2019