ATSAM3S-EK Atmel, ATSAM3S-EK Datasheet - Page 20

• Manufacturer Part Number: ATSAM3S-EK
• Description: KIT EVAL FOR ATSAM3S4C
• Manufacturer: Atmel
• Series: SAM3Sr
• Type: MCUr

Specifications of ATSAM3S-EK

• Contents: Board, Cables, Power Supply
• Silicon Manufacturer: Atmel
• Core Architecture: ARM
• Core Sub-architecture: Cortex-M3
• Kit Contents: Board
• Features: TFT Colour LCD Display, SD/MMC Interface
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• For Use With/related Products: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11031C–ATARM–30-Mar-11
Evaluation Kit Hardware
4.3.12.2 Analog Input
4.3.12.3 Analog Output
4.3.13
4.3.13.1 Keys
4-12
QTouch Elements
The BNC connector CN1 is connected to the ADC port PB1 as an external analog input. An on-board 50-
Ohm resistor termination can be applied by closing jumper JP16. A low pass filter can be implemented
for the BNC connector CN1 by replacing R94 and C78 with custom resistor and capacitor values,
depending on your application requirements.
A 10-KOhm potentiometer (VR1) is also connected to this channel to implement an easy access to ADC
programming and debugging (or implement an analog user control like display brightness, volume, etc.).
Either of these two functions can be selected by jumper JP18.
Figure 4-16. ADC Input
The BNC connector CN2 is connected to the DAC port PB13 and provides an external analog output. An
on-board 50-Ohm resistor termination can be enabled by closing jumper JP21. A filter can be imple-
mented on this output channel by replacing R106 and C90 with appropriate resistor and capacitor
values, depending on the application requirements.
Figure 4-17. DAC Output
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.
The SAM3S-EK implements five individual capacitive touch keys (UP, DOWN, RIGHT, LEFT and
VALID) using five pairs of PIO.
CN2
CN2
BNC
BNC
DAC01
5
1
2
3
4
CN1
CN1
BNC
BNC
AD12B5
Potentiometer
5
1
2
3
4
DGND
R109
R109
49.9R 1%
49.9R 1%
JP21
JP21
VR1
VR1
10K
10K
DGND
VCC33
DGND
R96
R96
49.9R 1%
49.9R 1%
JP16
JP16
2
C90
C90
R106
R106
0R
0R
AUDIO_OUTL
R94
R94
0R
0R
2.2uF
2.2uF
C89
C89
10nF
10nF
SOLDER DROP 2 pins open.Normal
DAC
JP18
JP18
C78
C78
10nF
10nF
ADC
1
1
SD1
SD1
SD2
SD2
SAM3S-EK Development Board User Guide
2
2
2
PB1
PB14