Azoteq IQ Switch ProxSense Series Quick Start Manual

Single Channel Capacitive Proximity/Touch Controller with movement detection
The IQS211A ProxSense
an awake/activate on proximity/touch function is required. The IQS211A offers ultra-low power
options and uses movement detection for applications that require long term handling during
proximity/touch. The device can be configured via OTP (One Time Programmable) bits.

1 Reference design and pin layout

IO1 / SCL / 1WIRE
VSS
IO2 / SDA
Figure 1.1
Pin Name
SCL
1 IO1 / SCL / 1WIRE
2 VSS
VSS
3 IO2 / SDA
4 VREG
SDA
5 VDDHI
6 Cx
VDDHI
R2
40R
U1
5
VDDHI
OUT
2
VSS
GND
C3 C4
IQS211A
1uF 100pF
MOV_OUT &
RST/WAKE_IN
GND GND
OUT

2 Ultra-low power configuration

VSS
For IQS211A 08000000 TSR devices (OTP Bank4: bit3 = 1 for VREG damping) the
CONFIG_IN
IQS211AEV02 main board can be configured to connect IO2 to R3 = 680Ω grounding resistor.
This resistance is mandatory for the ultra-low power operational mode.
Copyright © Azoteq (Pty) Ltd 2017.
All Rights Reserved.
OUT & MOV_PWM
VSS
ProxSense
IQS211AEV02 Quick start guide
®
IC is a self-capacitance controller designed for applications where
1 6 Cx
IQS
2 5 VDDHI
211A
3 4 VREG
Pin Layout
Table 1.1
000 -I2C
IQS211A in TSOT23-6
110 -I2C with reset indication
Type
1 6 Cx
Digital Input / Output
211
Signal GND
2 5 VDDHI
Digital Input / Output
Regulator output
3 4 VREG
Supply Input
Sense electrode
001 -Movement/Touch (OUT) 001 -Movement/Touch (OUT)
010 - Movement/ Prox (OUT) 010 - Movement/ Prox (OUT)
6
CX
1 6 Cx
IO1/SCL/DATA
1
IO1/SCL/1WIRE
3 IO2/SDA/EVENT
IO2/SDA/EVENT
211
4 VREG
2 5 VDDHI
VREG
C1
3 4 VREG
1uF
xxx – OUT / Input
GND
Figure 1.3 IQS211A Reference design
1 6 Cx
211
2 5 VDDHI
3 4 VREG
xxx – OUT&MOV / Rst&Wake
1 6 Cx
211
2 5 VDDHI
®
IQ Switch
®
Series
Figure 1.2
Pin-out description
Function
Multifunction IO1 / SCL / 1WIRE (I
signal / 1WIRE communication line)
Multifunction IO2 / SDA (I
Requires external capacitor
Supply:1.8V – 3.3V
Connect to conductive area intended for sensor
R1
MOV_OUT
470R
CX
C5
10pF
VSS
GND
C2
CONFIG_IN
100pF
GND
IQS211AEV02 Quick start guide
Revision 1.2
OUT & MOV_PWM
VSS
IQS211AEV02
000 -I2C
001 -Movement/Touch
2
C Debug Clock
010 - Movement/ Prox
011 - Movement/Input
100 - 1Wire + Mov
2
C Debug Data output)
101 - 1Wire Short+Rdy
110 - I2C with reset indication
VDDHI
011 – Movement/Input
DS0
R4
GREEN
470R
1 6 Cx
DS1
R5
BLUE
211
2 5 VDDHI
470R
VDDHI VDDHI
3 4 VREG
R6 R7
4k7 4k7
IO2/SDA/EVENT
IO1/SCL/DATA
xxx – OUT&MOV / Input
1 6 Cx
211
2 5 VDDHI
IO2/SDA/EVENT
IO1/SCL/DATA
Page 1 of 2
April 2017