User Manual

Note: This is a summary document. A
complete document is available under
NDA. For more information contact
www.atmel.com/touchscreen.
Features
• QField
™
Touchscreen:
– Up to 4.8 inches diagonal screen size supported
• Technology:
– Patented spread-spectrum charge-transfer (transverse mode)
• Panel Materials:
– Plastic, glass, composites, painted surfaces (low particle density metallic paints
possible)
• Adjacent Metal:
– Compatible with grounded metal immediately next to sensing channels
• Panel Thickness:
– 1 to 2 mm glass, 0.5 to 1.5 mm plastic
• Interface:
–I
2
C-compatible slave mode, 100 kHz or 400 kHz
• Moisture Tolerance:
– Best in class
• Power:
– 1.8V to 5.5V (2.5V to 5.5V in high speed mode)
• Packages:
– 32-pin 5 x 5 mm MLF RoHS compliant
• Signal Processing:
– Self-calibration, auto drift compensation, noise filtering
• Applications:
– Mobile electronics, terminals, appliances
• Patents:
– QMatrix
™
(patented Charge-transfer method)
– QField (patented Charge-transfer method, patent-pending QField optimized for
one-layer sensor element designs)
1. Pin-out and Pin Listing Descriptions
1.1 Device Pin-out
Y2A
Y1A
Y0A
RST
SCL
SDA
Y3B
Y2B
Vss VREF SMP X0 X1 X2 X3 N/C
Y3A
CHANGE
Vss
Vdd
Vss
Vdd
N/C
N/C
N/C
Vdd
Vdd
Vss
A0
Y0B
Y1B
1
2
3
4
5
6
7
817
18
19
20
21
22
23
24
32
31
30
29
28
27
26
25
9
10
11
16
15
14
13
12
AT42QT4160
Vdd
QField
™
10-bit
Touchscreen
Sensor IC
AT42QT4160
Summary
9507AS–AT42–10/08