ProxSense
®
Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
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IQS229EV01 module user guide
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.
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.
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
preferred
movement
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.
Threshold Level Selection
L = LOGIC LOW, H = LOGIC HIGH,F = FLOAT
T0, THR0 (pin 8)
L
L
L
F
F
F
H
H
H
T1, THR1 (pin 6)
L
F
H
L
F
H
L
F
H
Corresponding Threshold Level
0
1
2
3
4
5
6
7
8
◄More sensitive Less sensitive►
MOV_OUT
OUT
T0
MT
T1
TIM
GND
CX (Electrode)
VDDHI (1.8 - 3.3V)
NC
