The IQS360 ProxSense� is 12-channel mutual capacitive touch and proximity controller with market leading sensitivity and automatic tuning. The IQS360 provides a cost effective implementation in a small outline package for key pads and trackpads to 4 rows and 3 columns. Main Features
12 Mutual Channel Capacitive Controller Trackpad with on chip XY coordinate calculation Configurable to 4x3 elements x 512 resolution to 50Hz report rate Absolute and Relative Tracking Data or 2MHz Charge Transfer Frequency Advanced on-chip digital signal processing Automatic adjustment for optimal performance (ATI) User selectable Proximity and Touch thresholds Long proximity range Automatic drift compensation Fast I2C Interface Event mode or Streaming modes
4 PWM LED/ GPIOs drivers (5mA source/10mA sink) o Hardware PWM set through I2C memory map � no overhead from host o Dimming modes available, up and down o Minimum, maximum & adjustable limit levels for dimming modes Low Power, suitable for battery applications Supply voltage: 3.6V <3�A Active Sensing LP Mode
ApplicationsTrackpads Remote Controls & Smart Remotes Electronic Keypads or Pin pads Available options
ANALOGUE FUNCTIONALITY...............................................................................................................................6 DIGITAL FUNCTIONALITY.....................................................................................................................................6 HARDWARE CONFIGURATION.............................................................................................................................7 4.1 FIGURE 4.1 TABLE 4.1 4.2 FIGURE 4.2 FIGURE IQS360 PIN OUT........................................................................................................................................... 7 IQS360 PIN OUT IQS360 QFN-32 PIN-OUTS........................................................................................................................... 8 REFERENCE DESIGN........................................................................................................................................ 9 IQS360 REFERENCE DESIGN........................................................................................................................... 9 TRACKPAD LAYOUT REFERENCE........................................................................................................................ 9 POWER SUPPLY AND PCB LAYOUT................................................................................................................... 10 DESIGN RULES FOR HARSH EMC ENVIRONMENTS.............................................................................................. 10 HIGH SENSITIVITY......................................................................................................................................... 10
USER CONFIGURABLE OPTIONS......................................................................................................................... 11 5.1 FIGURE 5.2 TABLE ACTIVE CHANNELS........................................................................................................................................ 11 IQS360 CHANNEL MAPPING........................................................................................................................ 11 OPERATIONAL MODE..................................................................................................................................... 12 PROXIMITY THRESHOLD................................................................................................................................. 12 TOUCH THRESHOLDS..................................................................................................................................... 12 HALT TIMES................................................................................................................................................. 12 AC FILTER................................................................................................................................................... 12 POWER MODES........................................................................................................................................... 13 LP Modes 13 IQS360 CHARGE CYCLE TIMING IN LOW POWER MODE..................................................................................... 13 TYPICAL TIMINGS IN LP MODE........................................................................................................................ 14 Turbo Mode 15 BASE VALUE................................................................................................................................................ 15 TARGET VALUE............................................................................................................................................ 15 CHARGE TRANSFER SPEED.............................................................................................................................. 15 SNAP (DOME CLICK)...................................................................................................................................... 15 BLOCK 7/5.................................................................................................................................................. 16 BORDER CORRECTION................................................................................................................................... 16 REJECT TOUCHES.......................................................................................................................................... RX ON MULTIPLE......................................................................................................................................... 16 PROX PROJECTED......................................................................................................................................... 16 FORCE SLEEP............................................................................................................................................... 16 RELATIVE DATA............................................................................................................................................ 17 COORDINATE FILTER..................................................................................................................................... 17 ADDITIONAL FEATURES.................................................................................................................................. 17 Noise Detect 17 Halt Charge 17 Force Halt 17 CTX / CRX Float 17 Proj Bias 17 CS Size 17
Soft Reset LTA Beta Projected Up and Pass timePROXSENSE MODULE....................................................................................................................................... FIGURE 6.1 TABLE CHARGE TRANSFER CONCEPT.......................................................................................................................... 18 RATE OF CHARGE CYCLES............................................................................................................................... 19 Boost Power rate 20 IQS360 CHARGE CYCLE TIMING DIAGRAM IN BOOST POWER MODE...................................................................... 20 TYPICAL TIMINGS......................................................................................................................................... 20 Low Power rate 21 TOUCH REPORT RATE.................................................................................................................................... 21 LONG TERM AVERAGE................................................................................................................................... 21 DETERMINE TOUCH OR PROX.......................................................................................................................... 21 ATI........................................................................................................................................................... 22 ATI Method 22 ATI Sensitivity 22 ATI Target 22 ATI Base (Multiplier) 22 Re-ATI 23 Reseed 23 ATI Band 23 ATI ERROR 23
COMMUNICATION............................................................................................................................................ 7.1 7.1.1 TABLE 7.1 7.2 FIGURE 7.1 7.3 FIGURE 7.2 7.4 FIGURE TABLE I C SUB-ADDRESS......................................................................................................................................... 24 Internal sub-address selection I C SUB-ADDRESS SELECTION.......................................................................................................................... 24 CONTROL BYTE............................................................................................................................................ 24 IQS360 CONTROL BYTE............................................................................................................................... I C READ.................................................................................................................................................... 24 CURRENT ADDRESS READ............................................................................................................................... 24 2 RANDOM READ.I C WRITE............................................................................................................................ I C WRITE................................................................................................................................................. 25 END OF COMMUNICATION SESSION / WINDOW................................................................................................. 25 EVENT MODE.............................................................................................................................................. 25 RDY HAND-SHAKE ROUTINE.......................................................................................................................... I C SPECIFIC COMMANDS.............................................................................................................................. 25 Show Reset 25 WDT disable 26 Timeout Disable I C I/O CHARACTERISTICS.............................................................................................................................. I C INPUT VOLTAGE.......................................................................................................................... 26
TABLE 7.3 PROVIDES THE OUTPUT VOLTAGE LEVELS OF THE IQS360 DEVICE DURING I C COMMUNICATION........... 26 TABLE I C OUTPUT VOLTAGE....................................................................................................................... 26
PWM CONTROLLER........................................................................................................................................... 8.1 8.2 TABLE 8.1 FIGURE 8.1 PWM DIMING MODES................................................................................................................................. 27 PWM DUTY CYCLE MAPPING........................................................................................................................ 27 PWM DUTY CYCLE MAPPING........................................................................................................................ 27 PWM SLOPE............................................................................................................................................... 28
