Azoteq IQ Switch - ProxSense Series User manual

Copyright © Azoteq (Pty) Ltd 2019.
IQS263B EV02 User Guide
Page 1 of 17
All Rights Reserved.
Revision 2.1
May 2021
Azoteq
IQ Switch®
ProxSense®Series
IQS263BEV02 USER GUIDE
IQ Switch®- ProxSense®Series

Copyright © Azoteq (Pty) Ltd 2019.
IQS263B EV02 User Guide
Page 2 of 17
All Rights Reserved.
Revision 2.1
May 2021
Azoteq
IQ Switch®
ProxSense®Series
Table of Contents
IQS263BEV02 USER GUIDE............................................................................................................................ 1
INTRODUCTION ....................................................................................................................................... 3
SETTING UP FOR THE IQS263B EV KIT................................................................................................ 3
DRIVER BOARD AND IQS263B IC.......................................................................................................... 4
RED LED ON DRIVER BOARD..........................................................................................................5
WHEEL DEMO BOARD............................................................................................................................ 5
BAR AREA EXPLAINED....................................................................................................................6
WHEEL/SLIDER AREA EXPLAINED ...................................................................................................7
FLAGS &EVENTS WINDOW EXPLAINED ...........................................................................................7
WHEEL DEMO BOARD (PROJECTED EXAMPLE SIDE) ...................................................................... 7
3 KEYS DEMO BOARD ............................................................................................................................ 9
2 CHANNEL SLIDER + PROX................................................................................................................ 11
CHOOSING SETTINGS (FOR ADVANCED USERS) ............................................................................ 13
SETTINGS WINDOW..................................................................................................................... 14
Setup.............................................................................................................................................14
System Flags ................................................................................................................................14
Prox Settings 0 .............................................................................................................................14
Prox Settings 1 .............................................................................................................................14
Prox Settings 2 .............................................................................................................................14
Prox Settings 3 .............................................................................................................................15
Event Mask ...................................................................................................................................15
Multipliers & Compensation ..........................................................................................................15
Thresholds ....................................................................................................................................15
Timings, Targets & Gestures ....................................................................................................15
Data Logging ............................................................................................................................15
REFERENCE DESIGNS ......................................................................................................................... 16

Copyright © Azoteq (Pty) Ltd 2019.
IQS263B EV02 User Guide
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May 2021
Azoteq
IQ Switch®
ProxSense®Series
Introduction
This user guide describes the operation of the IQS263BEV02 Evaluation Kit. The EV-Kit consists of
4 parts: 2 x driver boards, the wheel demo board and the 3 keys demo board. The quick start guide
is also included. To visualise raw data from the EV-Kit, the driver board can be interfaced to any
personal computer with USB support, and IQS263B software Graphical User Interface (GUI). The
purpose of the IQS263BEV02 EV-Kit is to help application and development engineers in evaluating
the IQS263B’s self- and projected-capacitive capabilities. These capabilities will be shown using
buttons, sliders and a wheel. A picture of the evaluation kit is shown below.
Figure 1-1: CT210(A) (sold separately) (left), Driver boards (middle top and bottom), Wheel Demo board (right top) and 3
Keys Demo board (right bottom)
This user guide will help a user to use and understand the technology in this evaluation kit. The
driver board will be described, followed by the wheel demo board and the 3 keys demo board. This
will be shown in conjunction with an IQS263B GUI to simplify explanations.
Setting up for the IQS263B EV Kit
To interface the IQS263BEV02 Evaluation Kit to a PC we advise using the CT210(A) (CT210(A) is
sold separately). This EV Kit can be setup with the following steps:
> Connect the CT210(A) to the PC with a USB cable
> Plug the ribbon cable into the CT210(A)
> Connect the driver board to the ribbon cable
> Run the IQS263B GUI (latest version available from the Azoteq.com website)

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IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
Driver Board and IQS263B IC
The IQS263B IC (Integrated Circuit) is located on the driver board. The IQS263B can be used in
projected- or self-capacitive mode with up to 3 channels.
Start the IQS263B GUI with the following:
> Follow the steps as described above
> Read and close the Hints & Tips window
The IQS263B GUI should now resemble the figure shown below.
Figure 3-1: IQS263B GUI at start-up
In order to demonstrate the capabilities of the IQS263B, we will need a button layout for the driver
board. We suggest evaluating the supplied demo boards with the driver board. After this evaluation,
the user may want to develop other button/slider/wheel boards to connect with the driver board.

Copyright © Azoteq (Pty) Ltd 2019.
IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
Red LED on driver board
There is also a red LED located on the driver board. This LED is used as output when in self-
capacitive mode as a proximity indicator. This means that when the proximity threshold is crossed,
this LED turns on and when a finger leaves the proximity zone, it turns off.
In projected capacitive mode this LED works as one of the charging channels. It does not represent
a proximity event anymore.
Wheel demo board
Start with evaluating the wheel demo board. Plug this board into the driver board at the wheel socket
as shown below.
Now perform the following actions in the GUI.
> Click the Start button
> Select the “Wheel” board in the “Select startup mode :” window.
The GUI will load the default settings for the wheel demo board onto the IQS263B on the driver
board. The GUI will now resemble the figure shown below.
Figure 4-1: Wheel demo board connected to driver board

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IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
Figure 4-2: IQS263B GUI loaded with wheel demo settings
The GUI consists of a couple areas which gives the information from the IQS263B in different
formats. The bars (green) provide the touch strength on the wheel channels in this bar format. Below
this is each channel’s number, Count, Long Term Average (LTA), Delta and Touch THs values.
Bar area explained
Each Channel’s bar consists of two parts: lighter left side and darker right side. The lighter left side
represents the Count value and the darker right side the LTA value. The Delta is the difference
between the Count and LTA. When in self-capacitance mode (LTA – Count) and when in projected
capacitance mode (Count – LTA). The Touch THs is the threshold at which a touch event is
registered.
The channels numbers are 0 to 3, but channel 0 is an L when in low power mode. Channel 0 is either
turquoise (in low power mode); green (in normal power mode) or blue (in normal power mode). When
channel 0 turns blue it indicates a proximity event. Channels 1 to 3 are green when not touched and
red when touched on the wheel.

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IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
Wheel/Slider area explained
This area combines the 3 buttons to form a 3-channel wheel. The wheel indicates the position of a
touch on the wheel by looking at the touch strength on each channel. The slider gives this information
in a linear format and the relative coordinates slider in a longer slider that works from the relative
coordinates from the last touch position.
Flags & Events window explained
This window gives more information about the System Flags and Events on the IQS263B. The Low
Power indicates low power consumption on the IQS263B and the Halt indicates an LTA Halt on each
channel. For further explanation of these flags, it is advised to consult the datasheet.
The Events gives information about certain events that are happening. For the wheel demo board
the slider event becomes active when touched. When moved between channels the touch event is
triggered by touches or releases of channels, this event is activated and cleared. The Prox event is
also activated and cleared when entering and leaving Prox. When a quick touch and release on a
channel is made a tap event is triggered, this is shown here under events and on the bar area. The
time within which a quick touch must happen for it to be considered a tap is default at 352ms.
Wheel demo board (Projected Example side)
The wheel demo board can be turned around to demonstrate the projected slider. Do this by following
these steps:
> Click the Stop button in the GUI
> Unplug, turn the wheel demo board around and plug back in
The board setup should now look as shown below.
Return to the GUI and do the following:
•Click the Start button
•Select the 3 Channel Slider in the “Select startup mode :” window.
Figure 5-1: Projected example side of wheel demo board connected to driver board

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IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
The GUI will look very similar to the one shown above with the wheel demo board (wheel side).
Some of the differences will be described. Channel 0 stays green as the low power option has been
disabled for this demo board. The IQS263B is programmed in Projected Capacitance mode and thus
Counts increase instead of decrease when a touch is made. The wheel has been deactivated while
the slider and relative coordinates slider give an indication of position on the slider. An example of
this GUI is shown below.
Figure 5-2:IQS263B GUI loaded with wheel demo (Projected Example side) settings
This setup and GUI is like the wheel demo board setup.

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IQS263B EV02 User Guide
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Azoteq
IQ Switch®
ProxSense®Series
3 Keys demo board
To evaluate the 3 Keys demo board, plugin this board and setup the GUI for the 3 buttons. The
following steps can be followed:
> Click the Stop button
> Swap out the current board for the 3 Keys demo board
An example of this setup is shown below
Figure 6-1: 3 Keys demo board connected to driver board
To setup the GUI for this board, do the following:
> Click the Start button
> Select the 3 Discrete Keys option in the “Select startup mode : ” window.
The GUI will look as shown below.

Copyright © Azoteq (Pty) Ltd 2019.
IQS263B EV02 User Guide
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All Rights Reserved.
Revision 2.1
May 2021
Azoteq
IQ Switch®
ProxSense®Series
Figure 6-2: IQS263B GUI loaded with 3 keys settings
Touch the keys with a finger to evaluate this board. This board is used in projected capacitance
mode and thus the counts will rise when a touch is made. This board is also programmed for low
power and thus channel 0 is turquoise when in low power and green when in normal power. When
a finger comes close to the button, channel 0 will turn blue and trigger proximity. The IQS263B will
also change from low power mode to normal power mode if it was in low power mode. When a key
is touched the relevant channel will turn red.
The Halt bits in the “System Flags” section will also indicate when touches are made. The Prox and
Touch events will also trigger in the events menu. A tap will trigger when a touch and release is
made on a channel within a specified time. This time is programmed to be 352ms, which sets the
limit for a touch and release to be considered a tap. The default timer is dependent on the amount
of charge cycles made. Each charge cycle is default 22ms, and the default tap time multiplier is
chosen at 16. This and many other settings can be set in the Settings window, which is accessed
through the Setup button.