Atmel ATSAM3N-EK Data Sheet

11080C–ATARM–30-Mar-11

Figure 4-10.  SD Card

QTouch keys consist of a series of sensors formed by the association of a copper area and the capaci-
tive effect of human fingers approaching it.

Figure 4-11.   QTouch Elements

„

Keys

The SAM3N-EK implements two individual capacitive touch keys (RIGHT, LEFT) using two pairs of 
PIOs.

„

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 slider implementation is volume control.

There are two mechanical user buttons on the SAM3N-EK, 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.

NPCS_MicroSD

SPI MOSI

SPI MISO

SPI CLK

PA14

PA11
PA13

PA19

PA12

DGND

+3V3

DGND

DGND

R37

0R

R37

0R

R34

10K

R34

10K

R33

10K

R33

10K

C37
100nF

C37
100nF

R38

10R

R38

10R

J3
TF01A

J3
TF01A

RSV(DAT2)

1

CS(DAT3)

2

DI(CMD)

3

VCC

4

CLK

5

VSS

6

DO(DAT0)

7

RSV(DAT1)

8

GND

10

CD

9

Sh1

11

Sh2

12

Sh3

13

RA1
47KX4

RA1
47KX4

1

2

3

4

5

6

7

8

+

C36
10uF

+

C36
10uF

PC9

PC11

PC8

PC10

PC0

PC1

PC3

PC2

PC4

PC5

R55

1K

R55

1K

S1
DNP

S1
DNP

SL

SM

SR

SR

K1
DNP

K1
DNP

C50
22nF

C50
22nF

C46
22nF

C46
22nF

R57

1K

R57

1K

R54

1K

R54

1K

C47
22nF

C47
22nF

K2
DNP

K2
DNP

C48
22nF

C48
22nF

R53

1K

R53

1K

C49
22nF

C49
22nF

R56

1K

R56

1K