Azoteq IQ Switch - ProxSense Series User manual

IQ Switch®
ProxSense®Series
Copyright © Azoteq (Pty) Ltd 2017.
IQS277/8ASEV01 Quick start guide
Page 1 of 2
All Rights Reserved.
Revision 1.2
April 2017
IQS227/8ASEV02 Quick start guide
Single Channel Capacitive Proximity/Touch Controllerwith movement detection
The IQS227/8AS ProxSense®IC is a self-capacitance controller designed for applications
where an awake/activate on proximity/touch function is required. The IQS227/8AS
operates standalone or I2C can be configured via OTP (One Time Programmable) bits.
1 Reference design and pin layout
Figure 1.1 IQS227/8AS pinout Figure 1.2 IQS227/8ASEV02
IQS227/8AS in TSOT23-6
Pin
Name
Type
Function
1
TOUT
Digital Input / Output
Touch output / General output
2
VSS
Signal GND
3
POUT
Digital Input / Output
Multifunction proximity output / control input
4
VREG
Regulator output
Requires external capacitor
5
VDDHI
Supply Input
Supply:1.8V –3.3V
6
Cx
Sense electrode
Connect to conductive area intended for sensor
2 IQS227/8AS reference design
Figure 2.1 IQS277/8AS layout on AZP451B01
IQS
227AS
228AS
TOUT
VSS
POUT
Cx
VDDHI
VREG
1
2
3
6
5
4

IQ Switch®
ProxSense®Series
Copyright © Azoteq (Pty) Ltd 2017.
IQS277/8ASEV01 Quick start guide
Page 2 of 2
All Rights Reserved.
Revision 1.2
April 2017
3 Configuration options
The IQS227/8ASEV02 comes with 3 different coloured EV01 module boards each with their
own OTP configuration. Please refer to the leaflet inside the EV-kit box as shown on the left.
Solder mask colour
IC configuration
GREEN
IQS227AS 000C1D0C TS R
IQS228AS 000C1D00 TS R
BLUE
IQS227AS 00041E0C TS R
IQS228AS 00041700 TS R
BLACK
IQS227AS 00000008 TS R
IQS228AS 0000000C TS R
4 Default UI
Different UI’s can be selected in the IQS2227/8AS GUI and can then be selected to run in
standalone mode.
The GUI is available for download from the Software & Tools section of azoteq.com and the
CT210 (sold separately) is used in conjunction with the GUI to select the different UI’s and
settings.
Using USBProg the IQS227/8AS can be configured in different variations. Please note when
settings are programmed it is permanent.
Place jumper to
connect extra
pads to GND
Connect CT210
ribbon cable
2-WIRE / PGM: I2C comms or OTP programming
1-WIRE: 1-WIRE comms on TOUT/SCL pin.
oRequires OTP configuration
Place jumper to
connect extra
pads to Cx
IQS227/8ASEV02 Main PCB