User manual

Evaluation Kit Hardware
SAM4S-EK2 User Guide 4-14
11176A–ATARM–24-Sep-12
4.3.15 LEDs
There are three LEDs on the SAM4S-EK2 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
4.3.16 SD/MMC Card
The SAM4S-EK2 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
4.3.17 ZigBEE
SAM4S-EK2 has a 10-pin male connector for the RZ600 ZigBEE module.
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.
PA19
PA20
PC20
+3V3
DGND
D4Red-ledD4Red-led
R113
220R
R113
220R
Q1
IRLML2502
Q1
IRLML2502
1
3
2
R115 100KR115 100K
D3 Green-ledD3 Green-led
R117
220R
R117
220R
R111
220R
R111
220R
D2Blue-ledD2Blue-led
RA 1
68Kx4
1 2 3 45
6 7 8
R1 8
10K
R1 7
10K
PA28
C2 6
100nF
PA6
R2 0 0R
DG ND
J3
TF01A
DA T2
1
DA T3
2
CMD
3
VCC
4
CL K
5
VSS
6
DA T0
7
DA T1
8
GND
10
CD
9
Sh1
11
Sh2
12
Sh3
13
DG ND
+
C2 5
10uF
+3V3
PA29
R125 0R
R124 0R
R127 0R
R126 0R
PA30
PA31
PA26
PA27
SD CARD