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Evaluation Kit Hardware
4.3.15
LEDs
There are three LEDs on the SAM3S-EK board:
A blue LED (D2) and a green LED (D3), which are user defined and controlled by the GPIO.
A red LED (D4), which is a power LED indicating that the 3.3V power rail is active. It is also controlled
by the GPIO and can be treated as a user LED as well. The only difference with the two others is that
it is controlled through a MOS transistor. By default, the PIO line is disabled; a pull-up resistor controls
the MOS to light the LED when the power is ON).
Figure 4-21. LEDs
R111
+ 3 V 3
PA19
220R
D2
Bl u e-led
R11 3
PA20
PC20
220R
D 3
R115
Green-led
100K
1
Q1
IRLML2502
2
3
R117
220R
D4
Red-led
DGND
4.3.16
SD/MMC Card
The SAM3S EK has a high-speed 4-bit multimedia MMC interface, which is connected to a 4-bit
SD/MMC micro card slot featuring a card detection switch.
Figure 4-22. SD Card
+ 3 V 3
R17
10K
R1 8
10K
RA1
6 8 KX4
J 3
TF01A
PA26
PA27
PA2 8
PA29
PA 3 0
PA 3 1
R20
0R
1
2
3
4
5
6
7
8
DAT2
DAT 3
CMD
VCC
CLK
V SS
DAT0
DAT1
S h1
S h2
S h 3
11
12
1 3
PA6
+ C25
10 u F
C26
100nF
10
9
GND
CD
DGND
DGND
4.3.17
ZigBEE
SAM3S has a 10-pin male connector for the RZ600 ZigBEE module.
4-14
11031C–ATARM–30-Mar-11
Note:
0 Ohm resistors have been implemented in series with the PIO lines that are used else-
where in the design, thereby enabling their individual disconnection, should a conflict occur
in your application.
SAM3S-EK Development Board User Guide
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