Atmel ATSAM3N-EK Data Sheet

Evaluation Kit Hardware

4-6

SAM3N-EK Development Board User Guide

11080C–ATARM–30-Mar-11

Figure 4-7.

Backlight

4.3.9

JTAG/ICE

A standard 20-pin JTAG/ICE connector is implemented on the SAM3N-EK for the connection of a com-
patible ARM JTAG emulator interface, such as the SAM-ICE from Segger.

Notes: 1.

The NRST signal is connected to BP1 system button. The 0 ohm resistor R30 may be
removed in order to isolate the JTAG port from this system reset signal.

The TDO pin is in input mode with the pull-up resistor disabled when the Cortex M3 is
not in debug mode. To avoid current consumption on VDDIO and/or VDDCORE due to
floating input, the internal pull-up resistor corresponding to this PIO line must be
enabled.

Figure 4-8.

JTAG Connector

4.3.10

PWM Buzzer

A small, magnetic audio transducer connects through a MOSFET to PWM, allowing a range of options
for generating simple and complex tones.

Figure 4-9.

PWM Buzzer

4.3.11

SD/MMC Card

The SAM3N 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.

LCD BACKLIGHT

LED_A

PC13

LED_K1
LED_K2
LED_K3

+3V3

DGND

R16

47K

R16

47K

R20

19.1k, 1%

R20

19.1k, 1%

C34
1uF

C32
1uF

MN5
AAT3193IJQ-1-T1

C+

C-

EN/SET

RSET

OUT

GND

R17

C33
4.7uF

B1
BN03K314S300R

ICE INTERFACE

PB5

PB7

PB6

PB4

+3V3

DGND

PB[0..14]

NRST

R26

100K

R26

100K

R24

100K

R24

100K

R22

100K

R22

100K

VTref

Vsupply

nTRST

GND1

TDI

GND2

TMS

GND3

TCK

GND4

RTCK

GND5

TDO

GND6

nSRST

GND7

DBGRQ

GND8

DBGACK

GND9

R25

100K

R25

100K

R23

100K

R23

100K

R30

PA1

DGND

+3V3

B2
BN03K314S300R

R59

22R

R59

22R

MN9
SMD-050020F-03640

IRLML2502

R58
10K