Azoteq IQ Switch IQS127 User manual

IQ Switch®
ProxSense™Series
Copyright © Azoteq (Pty) Ltd 2010.
Evaluation Kit: User Manual
Page 1 of 7
All Rights Reserved.
Revision 1.0.2
November 2010
Evaluation Kit: User Manual
IQ Switch®- ProxSenseTM Series
IQS127 EV-Kit User Manual
Table of Content
1INTRODUCTION............................................................................................................................................. 1
2MOTHERBOARD............................................................................................................................................ 1
3SQUARE DAUGHTER BOARD ......................................................................................................................... 3
4ROUND DAUGHTER BOARD .......................................................................................................................... 5
5PROGRAMMING & STREAMING.................................................................................................................... 6
1 Introduction
This user manual describes the IQS127
evaluation kit. The EV-kit is made in two
parts, consisting of a mother board and
separate plug-in boards. It is developed to
facilitate application engineers and
development engineers in evaluating the
IQS127 capacitive proximity and touch
sensor. LEDs are used to display the
output of the device. The design of the EV-
kit allows for flexibility, allowing the user to
use the IQS127 in direct mode, streaming
mode to a PC, or use the small plug-in
boards in an application circuit.
2 Motherboard
Figure 2.1 shows the top view of the EV-kit
mother board. Its features include:
Battery powered; or
USB powered
15mm Diameter button
Back-grid as Shield
Back-grid as Ground
Back-grid as Sense Plate
Slide switch for programming or
streaming selection (See Figure 2.3).
Figure 2.1 Top-View of EV-kit mother board.

IQ Switch®
ProxSense™Series
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Evaluation Kit: User Manual
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Figure 2.2 Box header for Streaming/Programming.
The mother board includes a box header
for programming and streaming the IQS127
devices through Azoteq configuration tools
(CTxxx) to a PC, as well as two jumpers:
W1 –for measuring current
W2 –for back-grid selection
Figure 2.3 shows the bottom view of the
mother board. The daughter boards are
powered by two 3V coin cell batteries, in
series, which is regulated on the mother
board to 4.5V. A ground pin and mini USB
connector is also available to connect and
review the effect of introducing larger
ground references.
.
Figure 2.3 Bottom view of mother board.

IQ Switch®
ProxSense™Series
Copyright © Azoteq (Pty) Ltd 2010.
Evaluation Kit: User Manual
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3 Square Daughter Board
Figure 3.1 shows the top view of the
square daughter board. Its features
include:
Prox LED
Touch LED
Small PCB layout, 10.7mm x 10.7mm
Three possible assemblies:
Dual mode (D)
Shield mode (S)
Streaming mode (STRM)
Indicated by ink marking on
PCB
Figure 3.1 Top view of square daughter board. When looking from the top,
IC and PCB pins are mapped one-to-one.
Figure 3.2 shows the bottom view of the
square daughter board. Descriptions of the
components are given in Table 3.1. The
square daughter board can be wired into
applications, by connecting VDDHI (pin 5),
GND (pin 2) and a sense plate (pin 6) from
the application to the square daughter
board. This allows the IQS127 to be tested
in existing applications.

IQ Switch®
ProxSense™Series
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Evaluation Kit: User Manual
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Table 3.1 Square daughter board component descriptions.
Component
Use
Typical
Value
C1,C31
Power Supply
decoupling capacitor
1uF,
100pF1
C2,C41
Internal regulator
decoupling capacitor
1uF,
100pF1
R1 & R2
LED current limiting
resistor
2k
R3
CX series resistor
(Added ESD protection)
2k
R4
Shield Pull-up resistor
(only for IQS127S)
10k
Figure 3.2 Bottom view of square daughter board.
1Used for added RF immunity in extreme environments (GSM band)

IQ Switch®
ProxSense™Series
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Evaluation Kit: User Manual
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4 Round Daughter Board
Figure 4.1 shows the top view of the round
daughter board. Its features include:
Bi-colour Prox and Touch LED
Button on board
Backlighting through the button
Two possible assemblies:
Dual Mode
Streaming Mode
Figure 4.1 Top view of round daughter board.
Figure 4.2 shows the bottom view of the
round daughter board. Component
descriptions are given in Table 4.1. The
round daughter board makes it extremely
easy to wire the IQS127 into existing
applications for testing. It needs only
VDDHI (pin 5) and GND (pin 2), as it has a
button and output LEDs mounted on the
PCB already. To program the round
daughter board through the mother board,
R3 (2k) should be moved to R4 footprint.
R4 should also be placed instead of R3, to
connect larger/different sense plates to the
IQS127 (pin 6).
Table 4.1 Component descriptions for round daughter board.
Component
Use
Typical
Value
C1,C32
Power Supply
decoupling capacitor
1uF,
100pF2
C2,C42
Internal regulator
decoupling capacitor
1uF,
100pF2
R1 & R2
LED current limiting
resistor
2k
R3 or R4
CX selection resistor
(Added ESD protection)
2k
DS1
Bi-colour LED
N/A
2Used for added RF immunity in extreme environments (GSM band)

IQ Switch®
ProxSense™Series
Copyright © Azoteq (Pty) Ltd 2010.
Evaluation Kit: User Manual
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November 2010
Figure 4.2 Bottom view of round daughter board.
5 Programming & Streaming
The EV-Kit is by default in standalone
mode. However, for some applications it is
useful to evaluate the raw data of the
IQS127. To be able to use this feature, the
IQS127 needs to be in streaming mode.
The daughter boards can be programmed
through the mother board. Begin by:
Inserting the daughter board.
(Remember to move R3 to R4)
Move slide switch S2 to programming.
See Figure 5.1
Figure 5.1 Programming switch S2.

IQ Switch®
ProxSense™Series
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Evaluation Kit: User Manual
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Connect the EV-kit to a PC through a CT200.
Figure 5.2 Connect CT200 to PC (use 10 pin ribbon cable to EV-Kit).
Burn the IQS127 into streaming mode,
by using USBProg.exe (available on
the website: www.azoteq.com).
Move S2 back to SENSE after
programming. (And R3 back to R4 for
the round daughter board)
Streaming can now be done through
VisualProxSense.
The following patents relate to the device or usage of the device:
US 6,249,089 B1, US 6,621,225 B2, US 6,650,066 B2, US 6,952,084 B2, US 6,984,900 B1, US 7,084,526 B2,
US 7,084,531 B2, US 7,119,459 B2, US 7,265,494 B2, US 7,291,940 B2, US 7,329,970 B2, US 7,336,037 B2,
US 7,443,101 B2, US 7,466,040 B2, US 7,498,749 B2, US 7,528,508 B2, US 7,755,219 B2, US7,772,781, US
7,781,980 B2, EP 1 120 018 B1, EP 1 206 168 B1, EP 1 308 913 B1, EP 1 530 178 B1, ZL 99 8 14357.X, AUS
761094
IQ Switch®, ProxSense™, AirButton® and the IQ Logo are trademarks of Azoteq.
The information appearing in this Application Note is believed to be accurate at the time of
publication. However, Azoteq assumes no responsibility arising from the use of the information.
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 or otherwise, under any intellectual property rights. Azoteq reserves the right to alter its
products without prior notification. For the most up-to-date information, please contact
[e-mail] or refer to the website: www.azoteq.com

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