Download IQ Switch® ProxSense® Series

IQ Switch®
ProxSense® Series
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 1 of 7
June 2011
IQ Switch®
ProxSense® Series
Evaluation Kit: User Manual
IQ Switch® - ProxSense® Series
IQS221 EV-Kit User Manual
Table of Content
1
INTRODUCTION............................................................................................................................................. 2
2
MOTHERBOARD ............................................................................................................................................ 3
3
OPERATION ................................................................................................................................................... 4
4
PROGRAMMING & STREAMING .................................................................................................................... 7
1 Introduction
This user manual describes the IQS221 evaluation kit. The EV-kit is made in two parts,
consisting of a mother board and keypad. It is developed to facilitate application engineers
and development engineers in evaluating the IQS221 (9 channel) sensor with proximity and
touch detection. 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 IQS221 in direct mode, streaming mode to
a PC.
Evaluation Kit Contents:
1 x AZP075 Controller PCB:
1 x Keypad PCB
2 x CR2016 Battery (optional)
Optional CR2016 batteries included when
EV02 is used as stand-alone kit
The keypad is easy removable from the IQS221 controller PCB. This makes the controller
PCB a quick design tool when prototyping with the IQS221 9-channel capacitive sensing
controller IC. The module is assembled with a SO-32 packaged device, and SO-32 samples
are also included. These samples can be used for quick prototyping with any design. The
IQS221 IC are also packaged in the very compact QFN5x5-32 package.
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 2 of 7
June 2011
IQ Switch®
ProxSense® Series
2 Motherboard
The figure below shows the top view of the EV-kit mother board. Its features include:
Battery powered; or
External power supply powered
Modular design: Connect the supplied keypad into the main board, or wire the main
board into a prototype for rapid prototyping Back-grid as Shield
LEDs indicate proximity AND contact to the buttons (7 touch LEDs)
Can be used in one of 2 modes:
Direct mode using onboard LEDs: Battery powered and output on LED’s
Data Streaming Mode: Visualization and control from a PC GUI (requires Azoteq
Configuration Tool CT, or Azoteq Data Streamer DS)
Buzzer
Test pads for the driven shield, zero cross and analog measurement of key parameters
OTP bits can be programmed on the kit (requiresCTxxx)
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 3 of 7
June 2011
IQ Switch®
ProxSense® Series
3 Operation
1. Ensure Keypad is connected to EV02 controller PCB
2. Standalone Mode: Connect V+ and V- to supply voltage (3.0V – 5.5V) or flip
switch to ON position if optional battery kit is supplied. (Note: Remove battery before
connecting to PSU)
Debug Mode: Module can be connected to VisualProxSense on the SPI header to
evaluate the real-time working of the IQS technology (see Appnote for further
details: “AZD006 – VisualProxSense Overview verx.xx.pdf”).
DNP = Do Not Populate
VDD
GND
VDD
VDD
VDDHI
VDDHI VDD
C6
C7
C5
C8
10pF
100nF
1uF
100nF
GND
GND
GND
U2
16
TO0
TO1/MOSI
TO2/SOMI
SPI
Outputs
Direct Outputs
TO3/RDY
TO4/SCK
TO5/SS
TO6/SDA
TO7/SCL
TO0
TO1
TO2
TO3
TO4
TO5
TO6
TO7
5
OPT1
6
OPT2
7
RFIN
VDDHI
RF
R25
DNP
100k
29
30
31
32
1
2
3
4
SHLDIN
BUZZ
R35
POUT
13
ZC
12
ICTRL
11
BUZZ
8
POUT
VDDHI
VDD
SHLDOUT
TAB
33
GND
CX0
CX1
CX2
CX3
CX4
CX5
CX6
CX7
CX8
CS0
CS1
CS2
R34
14
15
SHLDOUT
28
24
20
26
22
18
25
21
17
2k
R16
2k
R12
2k
R15
R14
2k
R4
R3
2k
R7
2k
R6
2k
R10
2k
2k
CH0
CH1
CH2
CH3
Touch Keys
CH4
CH5
CH6
CH7
CH8
27
23
19
10
C1
IQS221_QFN50P-5X5-32
R36
43k
100k
R5
DNP
R38
50R
R17
100k
DNP
VSS
9
C2
33nF COG
R39
C3
33nF COG
33nF COG
ZC_IN
GND
GND
GND
GND
GND
GND
GND
GND
GND
IQS221 Reference Design (with optional synchronisation input and Driven Shield output)
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 4 of 7
June 2011
IQ Switch®
ProxSense® Series
Optional:
Syncronisation Input: The IQS221 can be syncronised with an external MCU or High
Voltage (50Hz) AC through the populating the correct resistors to the ZC pin.
Driven Shield Output: One channel of the IQS221 (CX8 for this design) can be shielded if
it is needed to locate the proximity sensor in a remote location.
V_USB
+3V3
D1
SW-1POLE-SLIDE
BAT54C
S1
3
2
1
DNP
3
U3
2
2
V+
DNP
R13
1
BT1
VDD
IN
OUT
NC
C10
5
1uF
SHUTDWN GND
R11
3
4
C9
1uF
1
S-812C 3.3V
Optional: Regulator stage (with reverse voltage protection)
GND
GND
GND
GND
red
DS5
DS4
DS3
DS2
R53
R54
GND
R55
GND
R56
GND
GND
R57
2k
red
DS6
2k
red
TO7/SCL
red
TO6/SDA
red
TO5/SS
2k
R52
TO4/SCK
2k
R51
TO3/RDY
2k
R50
DS7
2k
R58
red
DS8
TO2/SOMI
2k
DS9
2k
DS1
2k
red
TO1/MOSI
red
TO0
yellow
POUT
GND
VDDHI
VDDHI
VDDHI
VDDHI
VDDHI
VDDHI
VDDHI
100k
DNP
100k
DNP
100k
100k
DNP
Optional: LEDs to indicate active outputs
R26
R27
TO4/SCK
TO2/SOMI
TO5/SS
TO7/SCL
TO6/SDA
100k
R28
DNP
R31
DNP
100k
GND
R23
R29
100k
TO0
R33
DNP
TO1/MOSI
DNP
R32
R24
GND
GND
R21
GND
R22
R20
GND
R18
GND
R19
GND
Optional: External selections for prototyping
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 5 of 7
June 2011
IQ Switch®
ProxSense® Series
J1
GND
VDDHI
VDD
VDD
ZC
VDDHI
TO1/MOSI
TO2/SOMI
LS1
TO3/RDY
TO4/SCK
TO5/SS
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
DNP
R49 R46 R43 R48 R45 R42 R47 R44 R41
CX0
CX1
CX2
CX3
CX4
CX5
CX6
CX7
CX8
3
D
1 G
BUZZ
Q1
S
2
CH0
CH1
GND
CH2
CH3
CH4
CH5
CH6
CH7
CH8
GND
Optional: Buzzer, SPI Header, Keypad Header, Resistors to disable channels
Note:
•
•
•
•
•
•
•
Additional hardware not necessary for general designs with IQS221:
o Reverse voltage protection diode.
o 3.3VDC regulator (User can input up to 18VDC with regulator).
o External selection resistors for sensitivity prototyping purposes.
o Buzzer and related control hardware.
o Synchronising (ZC) input.
o Active driven shield output.
o Option to disable individual channels with resistors.
R[9:1] populated for additional ESD protection.
Sensitivity fine-tuning:
o Increase CS capacitors will increase module sensitivity.
o Decrease CS capacitor will decrease module sensitivity.
Default configuration (OTP bits):
o DIR-A. (Key 7 will not respond with a LED, as there are only 8 TO LEDs
populated)
o Normal power mode.
o LED will switch off if proximity occur for 15sec or more, and no touches are
detected (environmental filter – see datasheet for additional options).
o RF filter enabled.
o Shield disabled.
User can select custom options for IQS221 OTP bits with “PartNumberGenerator”
which can be found on www.azoteq.com under downloads section.
Keypad header can be used to connect controller PCB to custom product.
Connecting the IQS221 EV02 module to a good ground connection will significantly
increase proximity detection distance.
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 6 of 7
June 2011
IQ Switch®
ProxSense® Series
4 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 IQS221.
Connect the EV-kit to a PC through a CT200.
Streaming can now be done through VisualProxSense.
Connect CT200 to PC (use 10 pin ribbon cable to EV-Kit).
IQ Switch®, ProxSense®, LightSense™, 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
[email protected] or refer to the website: www.azoteq.com
Copyright © Azoteq (Pty) Ltd 2010.
All Rights Reserved.
Evaluation Kit: User
Manual
Revision 1.0.2
Page 7 of 7
June 2011