IQS333EV02 Azoteq

IQ Switch ProxSense Series IQS333EV02 Evaluation Kit User Guide IQ Switch - ProxSense Series Table of Contents 1 Introduction .............................................................................................................................. 1 2 Connection Board and IQS333 IC ........................................................................................... 1 3 Wheel Board ............................................................................................................................ 3 4 Cross Board ............................................................................................................................ 5 5 Reference Designs .................................................................................................................. 6 1 Introduction This user guide describes the operation of the IQS333EV02 Evaluation Kit. The EV-Kit consists of 3 parts, the connection board, the wheel board and the cross board. The quick start guide is also included. To visualise raw data from the EV-Kit, the connection board can be interfaced to any personal computer with USB support, and IQS333 software Graphical User Interface (GUI). The purpose of the IQS333EV02 EV-Kit is to help application and development engineers in evaluating the IQS333s 9 channel projected- and 7 channel self-capacitive proximity and touch sensors. A picture of the evaluation kit is shown below. Figure 1.1 Connection board (left), wheel module board (middle) and cross module board (right) This user guide will help a user to fully use and understand the technology in this evaluation kit. The connection board will be described, followed by the wheel module board and the cross module board. This will be shown in conjunction with an IQS333 GUI (Graphical User Interface) to simplify explanations. 2 Connection Board and IQS333 IC The IQS333 IC (Integrated Circuit) is located on the connection board. The IQS333 can be used in self-capacitive mode with up to 7 channels or in projected capacitive mode with up to 9 channels. In self-capacitive mode it can be used as 7 buttons or 1 slider with 4 buttons or 2 sliders with 1 button. In projected capacitive mode it can be used as 9 buttons or 1 slider with 6 buttons or 2 sliders with 3 buttons. The IQS333 has a configurable PWM controller which is used to drive LEDs and can be used as a general output pin. Figure 2.1 and Figure 2.2 shows the working of the PWM controller. Figure 2.1 shows the switched on LEDs on the connection board. This is achieved by running the IQS333 GUI through following the next steps. Run IQS333 Application Read and Close the Hints & Tips menu Click the Start button Click the Wheels/Slider bar to get to the Compensation/Multiplier/Thresholds bar. Copyright Azoteq (Pty) Ltd 2014 IQS333EV02 Evaluation Kit User Guide Page 1 of 8 All Rights Reserved Revision 1.0 February 2014 IQ Switch ProxSense Series Set the Mode to Const (Constant) and CMP (Compare) value to 31. Click the Send button. The LEDs on the connection board should turn on as shown below. Figure 2.1 Connection board with PWM LEDs switched on The GUI should look similar to the screenshot below with the relevant settings highlighted. Figure 2.2 Switch PWM LEDs on with IQS333 GUI The connection board has 2 10-way headers, 1 box header for communicating with a microcontroller, such as a CT210, and a straight DIL header for connecting to the sense electrodes. The pin outs for the headers are numbered in Figure 2.3 and each pins description is given in Table 1. This is given as users may wish to connect their own sensing electrodes to the IQS333. Copyright Azoteq (Pty) Ltd 2014 IQS333EV02 Evaluation Kit User Guide Page 2 of 8 All Rights Reserved Revision 1.0 February 2014