Azoteq ProxSense Series User Manual

Single Channel Capacitive Proximity/Touch Controller for SAR Applications
Operation Characteristics
The IQS229 will work in standalone mode
(STD – LED outputs) or streaming mode
(STRM), depending on a resistor placement.
By default the module will be configured in
standalone mode.

"OUT" (BLUE) LED will indicate an
activation (crossing of the threshold)

"MOV_OUT" (GREEN) LED will indicate
movement in small detectable amounts.
GND
CX (Electrode)
VDDHI (1.8 - 3.3V)
User Configurable Options
Four pins on the IQS229 are used for
external configuration. Floating pins are the
default configuration. The configuration is
read at power-on or reset. To see how
resistor straps are applied, see the next page.
Start off by choosing a threshold. T0 is used
to set a large jump in threshold and T1 is
used to set smaller offsets.
Next choose the
sensitivity by strapping MT.
Then choose a no movement time-out. If no
movement is detected in this time, the sensor
will clear the activation. With each movement
the IQS229 will reset the timer.
Copyright © Azoteq 2013
ProxSense
IQS229EV01 module user guide
TIM
NC
preferred movement
IQS229EV01 module user guide v1.2
®
Series
Integration
Start the integration of the IQS229 by wiring
the following into the intended application:
1. GND
2. CX (Electrode – wire or copper pad)
3. VDDHI
On-board LEDs may be used for feedback, or
the OUT and MOV_OUT pins may be taken
to a microcontroller.
Threshold Level Selection
L = LOGIC LOW, H = LOGIC HIGH,F = FLOAT
T0, THR0 (pin 8)
L L L F
T1, THR1 (pin 6)
L F H L
Corresponding Threshold Level
0 1 2 3
◄More sensitive
MOV_OUT
OUT
T0
MT
T1
F F H H
F H L F
4 5 6 7
Less sensitive►
For more information
visit www.azoteq.com
H
H
8