IQS231AEV02-S Azoteq

IQ Switch ProxSense Series IQS231AEV02 Quick start guide Single Channel Capacitive Proximity/Touch/SAR Controllerwith movement detection The IQS231A ProxSense IC is a self-capacitance controller designed for SAR applications where a reliable proximity detection function is required along with human and inanimate object distinction. The IQS231A uses quick release and movement detection to achieve this. 2 The IQS231A operates standalone or I C can be configured via OTP (One Time Programmable) bits. The IC is also available in DFN10 (3x3) package and WLCSP (0.9x1.5). 1 Reference design and pin layout 1 6 Cx IO1 / SCL IQS VSS 2 5 VDDHI 231A 3 4 VREG IO2 / SDA Figure 1.1 TSOT23-6 Pin layout Figure 1.2 IQS231AEV01 Table 1.1 Pin-out description IQS231A in TSOT23-6 Pin Name Type Function 2 1 IO1 / SCL Digital Input / Output Multifunction IO1 / SCL (I C Clock signal) 2 VSS Signal GND 2 3 IO2 / SDA Digital Input / Output Multifunction IO2 / SDA (I C Data output) 4 VREG Regulator output Requires external capacitor 5 VDDHI Supply Input Supply:1.8V 3.3V 6 Cx Sense electrode Connect to conductive area intended for sensor Table 1.2 Multifunction pin descriptions Multifunction Multifunction pin option pin name IO1 Proximity output / Proximity output with heartbeat IO2 Sensitivity input / Synchronization input / Movement output / Touch output Figure 1.2 IQS231AEV02 Copyright Azoteq (Pty) Ltd 2017. Page 1 of 2 IQS231AEV02 Quick start guide All Rights Reserved. Revision 1.2 April 2017 IQ Switch ProxSense Series Figure 1.3 Reference design 2 Configuration information Default config (IQS231A 00000000 TSR): Standalone operation mode Default EV02 config (IQS231A 31313000 TSR): Standalone operation mode Alternative config (IQS231A 00004000 TSR): I2C mode External configuration options are available when using the IQS231A in standalone mode. OTP configuration of the devices allow for different functionality of IO2 multifunction pin. Pin1: IO2 / SDA Pin2: GND Table 2.2 Standalone mode IO2 input configuration options IQS231A 31313000 TSR Default settings for EV02. The modules supplied are programmed to show movement output on green LED, no movement time-out 10seconds, quick release time-out 2seconds. IQS231A 00000000 TSR Sensitivity adjustment input on IO2 P4 pin1 floating (internal pull-up on IO2): Less sensitive P4 pin1 connected to pin2 = GND: More sensitive 3 Evaluation and configuration Different UIs can be selected in the IQS231A GUI and can then be selected to run in standalone mode. The GUI is available for download from the Software & Tools section of azoteq.com and theCT210 (sold separately) is used in conjunction with the GUI to select the different UIs and settings. Using USBProg the IQS231A can be configured in different variations. Please note when settings are programmed it is permanent Copyright Azoteq (Pty) Ltd 2017. Page 2 of 2 IQS231AEV02 Quick start guide All Rights Reserved. Revision 1.2 April 2017