Azoteq IQ Switch ProxSense IQS231EV02 Quick Start Manual

Single Channel Capacitive Proximity/Touch/SAR Controller with movement detection
The IQS231ProxSense
where a reliable proximity detection function is required along with human and inanimate
object distinction. The IQS231 uses quick release and movement detection to achieve this.
The IQS231 operates standalone or I
Programmable) bits.

1 Reference design and pin layout

Figure 1.1 IQS231EV02
IQS231 in TSOT23-6
Pin Name
PRIMARY I/O
1
VSS
2
SECONDARY
3
I/O / Tx
VREG
4
VDDHI
5
Cx
6
Multifunction pin name
IO1
IO2
Copyright © Azoteq (Pty) Ltd 2015.
All Rights Reserved.
IQ Switch
ProxSense
IQS231EV02 Quick start guide
®
IC is a self-capacitance controller designed for SAR applications
Table 1.1 Multifunction pin descriptions
Type
Digital Input/Output
Signal GND
Digital Input/Output
Regulator output
Supply Input
Sense electrode
Table 1.2
Multifunction pin option
Proximity output / Proximity output with heartbeat
Sensitivity input / Synchronization input /
Movement output / Touch output
IQS231EV02 Quick start guide
®
®
Series
2
C can be configured via OTP (One Time
IO1 / SCL
VSS
IO2 / SDA / Tx
Figure 1.2 TSOT23-6 Pin layout
Function
Multifunction IO1 / SCL (I
Multifunction IO2 / SDA (I
/ Tx
Requires external capacitor
Supply:1.75V – 3.6V
Connect to conductive area intended for
sensor
Pin-out description
Revision 1.0
1 6 Cx / Rx
IQS
2 5 VDDHI
231
3 4 VREG
2
C Clock signal)
2
C Data output)
Page 1 of 3
August 2015