Azoteq ProxSense Series User Manual

IQS229EV03 User guide (quick-start)
Single Channel Capacitive Proximity/Touch Controller for SAR Applications

Introduction

The IQS229EV03 Evaluation kit features the
IQS229EV01 module PCB. This kit enables
the evaluation of the user interface as well as
the effect of the 4 resistor strap options:

2x Inputs are used to set the
activation threshold,

1x for the movement sensitivity and

1x for choosing a no-movement time-
out timer.
The IQS229 will work in standalone mode
(direct outputs) or streaming mode for
evaluation with a GUI using an Azoteq USB
streaming device (CT210).
The outputs may be interpreted as follows:

"ACTIVATION" → normal crossing of the
threshold

"MOVEMENT" → a pulse for every
movement detected.

First time power-up

When powering up for the first time, be sure
that the "STANDALONE" option is selected
by fitting a jumper onto the middle and lower
pins.
Switching the power should cause a blip on
the "POWER ON" LED. This is done so that
the evaluation kit may be left on for long
periods without draining the battery.
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®
ProxSense Series
While holding the kit with the one hand, bring
the
ELECTRODE". The user will be able to get
an idea of the movement response and
activation threshold.
By placing the electrode on a static object, an
"ACTIVATION" will be triggered, but it will
automatically clear after a no-movement
timeout.
By continually handling the device while in
ACTIVATION, the trigger will always remain
Figure 1 IQS229EV03 front view
active.
Next is to familiarize oneself with the
"EXTERNAL STRAP OPTIONS" table on the
front of the kit.

External strap options

The external strap options are only read in
Strap High/Low or Float
When no jumper is placed, a floating input is
detected.
strapped high or low by placing a jumper.
Figure 2 Strap LOW /
IQS229EV03 User guide (quick-start)
v1.1
other closer to

power-on and

reset events.
Otherwise the
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the "SENSING
input can be
Strap HIGH