Atmel SAM4S-EK2 Atmel ATSAM4S-EK2 ATSAM4S-EK2 Data Sheet

11176A–ATARM–24-Sep-12

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

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

SAM4S-EK2 has a 10-pin male connector for the RZ600 ZigBEE module.

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

D4

Red-led

D4

Red-led

R113
220R

R113
220R

Q1

IRLML2502

Q1

IRLML2502

1

3

2

R115

100K

R115

100K

D3

Green-led

D3

Green-led

R117
220R

R117
220R

R111
220R

R111
220R

D2

Blue-led

D2

Blue-led

RA 1
68 Kx4

1

2

3

4

5

6

7

8

R1 8

10 K

R1 7

10 K

PA 28

C2 6
10 0nF

PA 6

R2 0

0R

DG ND

J3
TF01A

DA T2

1

DA T3

2

CMD

3

VCC

4

CL K

5

VS S

6

DA T0

7

DA T1

8

GND

10

CD

9

Sh 1

11

Sh 2

12

Sh 3

13

DG ND

+

C2 5
10 uF

+3 V3

PA 29

R1 25

0R

R1 24

0R

R1 27

0R

R1 26

0R

PA 30
PA 31

PA 26
PA 27