at42qt2160 ATMEL Corporation, at42qt2160 Datasheet - Page 3

• Manufacturer Part Number: at42qt2160
• Description: Qslide?, 16-key Qmatrix? Sensor Ic
• Manufacturer: ATMEL Corporation

3. Introduction
9502A–AT42–07/08
Table 2-1.Pin Listing (continued)
The QT2160 device is a digital burst mode charge-transfer (QT) sensor designed specifically for
matrix layout touch controls; it includes all signal processing functions necessary to provide
stable sensing under a wide variety of changing conditions. Only a few external parts are
required for operation. The entire circuit can be built within a few square centimeters of
single-sided PCB area. CEM-1 and FR1 punched, single-sided materials can be used for the
lowest possible cost. The PCB’s rear can be mounted flush on the back of a glass or plastic
panel using a conventional adhesive, such as 3M VHB two-sided adhesive acrylic film.
The QT2160 employs transverse charge-transfer (QT) sensing, a technology that senses
changes in electrical charge forced across two electrode elements by a pulse edge (see
Figure
single touch panel.
The device uses an
individual key parameter setup. The command structure is designed to minimize the amount of
data traffic while maximizing the amount of information conveyed.
In addition to normal operating and setup functions the device can also report back actual signal
strengths.
Pin
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
3-1). The QT2160 allows a wide range of key sizes and shapes to be mixed together in a
Function
GPIO1
I2CA0
I2CA1
SDA
Y0B
Y1B
SCL
RST
Y0A
Y1A
Vdd
Vdd
Vss
X4
X5
I
2
C
-compatible interface to allow key data to be extracted and to permit
OD
OD
I/O
I/O
I/O
I/O
I/O
I/O
O
O
P
P
P
I
I
I
X matrix drive line / shared GPO X4
X matrix drive line / shared GPO X5
Power
Power
Supply ground
Y line connection
Y line connection
I
I
Serial Interface Data
Serial Interface Clock
Reset low; has internal 30k - 60k pull-
up
Y line connection
Y line connection
General purpose input/output 1
2
2
C-compatible address select
C-compatible address select
Comments
AT42QT2160
Leave open or
Connect To...
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
If Unused,
Vdd
-
-
-
-
-
-
-
3