Azoteq ProxSense Series User manual

ProxSense®Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
For more information
visit www.azoteq.com
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

ProxSense®Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
For more information
visit www.azoteq.com
Using resistor strap options
Resistor straps are used to configure the
device as shown below. It is recommended
to use a 1MΩresistor for this purpose. After
power-up or reset the values will be read
and each pin is written with the values that
was read. This eliminates potential leakage
current.
Less sensitive
More sensitive
TIM (pin 1)
No Movement
Time-out
Low
60sec
Float
3min
High
10min
MT
MOV_THR (pin 7)
Movement
Threshold
Low
More sensitive
Float
Default
High
Less sensitive
More sensitive Less Sensitive
Shorter timer
Longer timer
Less sensitive
More sensitive
T0:
Large
steps
T1:
Small
steps
Threshold Adjustment
TIM: Timer Adjustment
MT: Movement
sensitivity adjustment
Standalone (default) 1-Wire Streaming
1MegΩpull-down (debugging) 4.7kΩ
OT/OUT Function

ProxSense®Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
For more information
visit www.azoteq.com
Schematic and assembly
Figure 2 AZP408A05 assembly
VDDHI
C3
100pF
C6
100pF
C5
1uF
C4
1uF
TIMER
1
VSS 2
CRX0
3VDDHI 4
VREG 5
THR1
6
MOV_THR
7
THR0
8
OUT
9
MOV_OUT
10
TAB 11
U1
IQS229S
GND GNDGND
R1
1.0K
CX
MOV_THR
TIMER
THR0
THR1
MOV_OUT
OUT
MOV_OUT
DS1
WEJT81HC-23
R2
330R
R9
1.0K
VDDHI
OUT
MOV_OUT
R3
10K
VDDHI
GND
OUT pin:
Standalone -> pull-down
I2C debug ->pull-up Configuration pins:
float ->mid-range
pull-down -> more sensitive / shortertimes
pull-up -> less sensitive / longer times
3 1
2
R4
SOT
3 1
2
R5
SOT
3 1
2
R6
SOT
3 1
2
R7
SOT
MOV_THR TIMER THR0 THR1
VDDHI
GND
3 1
2
R8
SOT
VREG
C2
18pF
DS2
KPT-2012SRC
Default:
1 Meg pull-down
OUT
GND
3
1
2
Q1
BSS84LT1
GND
LEDoutputsElectrode&Decoupling
Strapoptioninputs
Figure 1 AZP408A05 Schematic

ProxSense®Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
For more information
visit www.azoteq.com
Recommended landing pad
Figure 3 Recommended AZP408A05 landing pad
Programming
The IQS229 has various one-time-programmable (OTP) fuse options. Information about these
options are available on request and are only recommended for larger orders (>50k) or when
in-circuit programming is an option after the SMT process.
Connect the AZP408A05 to the CT210 as shown in Figure 4.
Figure 4 AZP408A05 connection to CT210 for IQS229 fuse burn
It is important to remove R2 when configuring the IQS229 OTP bits. The CT210 will configure
the programming via I2C and the R2 / DS1 combination will cause the CLK line to become
sluggish. Place R2 again after programming.
Program the IQS229 using the Azoteq USBProg utility.
16mm
1.5mm
2mm
2.5mm
10mm
14mm

ProxSense®Series
Copyright © Azoteq 2013
IQS229EV01 module user guide v1.2
For more information
visit www.azoteq.com
Appendix A Contact Information
USA
Asia
South Africa
Physical
Address
6507 Jester Blvd
Bldg 5, suite 510G
Austin
TX 78750
USA
Rm1725, Glittery City
Shennan Rd
Futian District
Shenzhen, 518033
China
109 Main Street
Paarl
7646
South Africa
Postal
Address
6507 Jester Blvd
Bldg 5, suite 510G
Austin
TX 78750
USA
Rm1725, Glittery City
Shennan Rd
Futian District
Shenzhen, 518033
China
PO Box 3534
Paarl
7620
South Africa
Tel
[phone]
[phone]
ext 808
[phone]
Fax
[phone]
[phone]
Email
[e-mail]
[e-mail]
[e-mail]
Please visit www.azoteq.com for a list of distributors and worldwide representation.
The following patents relate to the device or usage of the device: US 6,249,089 B1, US 6,952,084 B2, US 6,984,900
B1, US 7,084,526 B2, US 7,084,531 B2, EP 1 120 018 B2, EP 1 206 168 B1, EP 1 308 913 B1, EP 1 530 178 A1,
ZL 99 8 14357.X, AUS 761094, HK 104 14100A, US13/644,558, US13/873,418
IQ Switch®, SwipeSwitch™, ProxSense®, LightSense™, AirButton®and the logo are trademarks of Azoteq.
The information in this Datasheet is believed to be accurate at the time of publication. Azoteq uses reasonable effort to maintain the information up-to-date and accurate, but does not warrant
the accuracy, completeness or reliability of the information contained herein. All content and information are provided on a “as is” basis only, without any representations or warranties, express
or implied, of any kind, including representations about the suitability of these products or information for any purpose. Azoteq disclaims all warranties and conditions with regard to these
products and information, including but not limited to all implied warranties and conditions of merchantability, fitness for a particular purpose, title and non-infringement of any third party
intellectual property rights. Azoteq assumes no liability for any damages or injury arising from any use of the information or the product or caused by, without limitation, failure of performance,
error, omission, interruption, defect, delay in operation or transmission, even if Azoteq has been advised of the possibility of such damages. The applications mentioned herein are used solely
for the purpose of illustration and Azoteq makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for
application that may present a risk to human life due to malfunction or otherwise. Azoteq products are not authorized for use as critical components in life support devices or systems. No
licenses to patents are granted, implicitly, express or implied, by estoppel or otherwise, under any intellectual property rights. In the event that any of the abovementioned limitations or
exclusions does not apply, it is agreed that Azoteq’s total liability for all losses, damages and causes of action (in contract, tort (including without limitation, negligence) or otherwise) will not
exceed the amount already paid by the customer for the products. Azoteq reserves the right to alter its products, to make corrections, deletions, modifications, enhancements, improvements
and other changes to the content and information, its products, programs and services at any time or to move or discontinue any contents, products, programs or services without prior
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