Evaluation Kit Hardware
4-12
SAM3S-EK Development Board User Guide
11031A–ATARM–14-Dec-09
Figure 4-17.
DAC Output
4.3.13
QTouch Elements
QTouch keys consist in a series of sensors formed by the association of a copper area and the capaci-
tive effect of human fingers approaching it.
4.3.13.1 Keys
The SAM3S-EK implements five individual capacitive touch keys (UP, DOWN, RIGHT, LEFT and
VALID) using five pairs of PIO.
Figure 4-18.
QST Keys
4.3.13.2 Slider
A group of channels forms a Slider. A Slider is composed of three channels for a QTouch acquisition
method using three pairs of PIO. Such a sensor is used to detect a linear finger displacement on a sen-
sitive area. A typical implementation is volume control.
SOLDER DROP 2 pins open.Normal
DAC01
DAC
AUDIO_OUTL
DGND
PB14
C90
2.2
u
F
C90
2.2
u
F
JP21
JP21
R109
49.9R 1%
R109
49.9R 1%
S
D1
S
D1
1
2
R106
0R
R106
0R
CN2
BNC
CN2
BNC
1
2
3
4
5
S
D2
S
D2
1
2
PC25
PC24
PC
3
1
PC
3
0
PC29
PC2
8
PC2
3
PC22
PC27
PC26
R5
3
1K
R5
3
1K
C49
22nF
C49
22nF
R60
1K
R60
1K
R51
1K
R51
1K
R57
1K
R57
1K
C51
22nF
C51
22nF
R55
1K
R55
1K
C47
22nF
C47
22nF
K1
DNP
K1
DNP
C5
3
22nF
C5
3
22nF
C52
22nF
C52
22nF
