User manual

Evaluation Kit Hardware
SAM4S-EK2 User Guide 4-13
11176A–ATARM–24-Sep-12
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 PIOs. Such a sensor is used to detect a linear finger displacement on a sen-
sitive area. A typical implementation is volume control.
Figure 4-19. QT_Slider
4.3.14 User Buttons
There are two mechanical user buttons on the SAM4S-EK2, which are connected to PIO lines and
defined to be "left" and "right" buttons by default.
In addition, a mechanical button controls the system reset, signal NRST.
Figure 4-20. System Buttons
PC25
PC24
PC31
PC30
PC29
PC28
PC23
PC22
PC27
PC26
R53 1KR53 1K
C49
22nF
C49
22nF
R60 1KR60 1K
R51 1KR51 1K
R57 1KR57 1K
C51
22nF
C51
22nF
R55 1KR55 1K
C47
22nF
C47
22nF
K1
DNP
K1
DNP
C53
22nF
C53
22nF
C52
22nF
C52
22nF
22nF use X7R
S1
QTouch Slider
SL
SM
SR
SR
PA1
PA3
PA0
C4 8
22nF
C5 0
22nF
C4 6
22nF
PA2
PA4
PA5
R5 0 1K
R5 4 1K
R5 2 1K
PB3
PC12
DGND
NRST
JP26JP26
BP1BP1
1
4
2
3
BP3BP3
1
4
2
3
JP25JP25
BP2BP2
1
4
2
3