Atmel SAM3U-EK User manual

6478B–ATARM–05-Oct-09
SAM3U-EK Development Board
....................................................................................................................
User Guide

1-2 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09

SAM3U-EK Development Board User Guide 1-1
6478B–ATARM–05-Oct-09
Section 1
Introduction.................................................................................................................1-1
1.1 SAM3U-EK......................................................................................................................... 1-1
1.2 User Guide ......................................................................................................................... 1-1
1.3 References and Applicable Documents ............................................................................. 1-1
Section 2
Kit Contents ................................................................................................................2-1
2.1 Deliverables ....................................................................................................................... 2-1
2.2 Electrostatic Warning ......................................................................................................... 2-1
Section 3
Power Up....................................................................................................................3-1
3.1 Power up the Board ...........................................................................................................3-1
3.2 Battery................................................................................................................................ 3-1
3.3 DevStart ............................................................................................................................. 3-1
3.4 Recovery Procedure .......................................................................................................... 3-1
3.5 Sample Code and Technical Support ................................................................................ 3-2
Section 4
Evaluation Kit Hardware .............................................................................................4-1
4.1 Board Overview.................................................................................................................. 4-1
4.2 Features List ...................................................................................................................... 4-2
4.3 Function Blocks.................................................................................................................. 4-2
4.3.1 Processor............................................................................................................. 4-2
4.3.2 Memory................................................................................................................ 4-2
4.3.3 Clock Circuitry...................................................................................................... 4-4
4.3.4 Reset and Wake-Up Circuitry .............................................................................. 4-5
4.3.5 Power Supply and Management.......................................................................... 4-6
4.3.6 UART ................................................................................................................... 4-7
4.3.7 USART................................................................................................................. 4-7
4.3.8 LEDs .................................................................................................................... 4-8
4.3.9 LCD, Backlight Control and Touch Panel ............................................................ 4-8
4.3.10 JTAG.................................................................................................................. 4-11
4.3.11 Audio Codec ...................................................................................................... 4-11
4.3.12 USB ................................................................................................................... 4-13
4.3.13 ADC Input ........................................................................................................ 4-14
4.3.14 User Buttons ...................................................................................................... 4-14
4.3.15 G-Sensor ........................................................................................................... 4-15
4.3.16 Temperature Sensor .......................................................................................... 4-16
4.3.17 SD Card ............................................................................................................. 4-16

1-2 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
4.3.18 ZigBee ............................................................................................................... 4-17
4.3.19 PIO Expansion................................................................................................... 4-18
4.4 Configuration.................................................................................................................... 4-19
4.4.1 PIO Usage ......................................................................................................... 4-19
4.4.2 Jumpers ............................................................................................................. 4-22
4.4.3 Test Points ......................................................................................................... 4-23
4.4.4 Solder Drops...................................................................................................... 4-23
4.4.5 Assigned PIO Lines, Disconnection Possibility.................................................. 4-23
Section 5
Schematics .................................................................................................................5-1
5.1 Schematics......................................................................................................................... 5-1
Section 6
Troubleshooting..........................................................................................................6-1
6.1 Self-Test............................................................................................................................. 6-1
6.2 Board Recovery ................................................................................................................. 6-1
Section 7
Revision History..........................................................................................................7-1
7.1 Revision History ................................................................................................................. 7-1

SAM3U-EK Development Board User Guide 1-1
6478B–ATARM–05-Oct-09
Section 1
Introduction
1.1 SAM3U Evaluation Kit
The SAM3U Evaluation Kit (SAM3U-EK) allows the evaluation of the SAM3U series devices. It has
enough features to demonstrate most of the product’s capabilities to the users. The SAM3U-EK also fea-
tures extension connectors to allow the users to add new interfaces in case they are not on-board.
1.2 User Guide
This guide gives details on how the SAM3U-EK has been designed. It is made up of 6 sections:
Section 1 includes references, applicable documents
Section 2 describes the kit contents, its main features
Section 3 provides instructions to power up the SAM3U-EK and describes how to use it.
Section 4 describes the hardware resources, and includes default jumper and switch settings, and the
schematics.
Section 5 provides all the board schematics
Section 6 give troubleshooting recommendations
1.3 References and Applicable Documents
Table 1-1. References and Applicable Documents
Title Comment
SAM3U Datasheet http://www.atmel.com/dyn/products/product_card.asp?part_id=4562

SAM3U-EK Development Board User Guide 2-1
6478B–ATARM–05-Oct-09
Section 2
Kit Contents
2.1 Deliverables
The Atmel®SAM3U-EK toolkit contains the following items:
a SAM3U-EK board
power supply
universal input AC/DC power supply with US, Europe and UK plug adapters
one 3V Lithium Battery type CR1225
one USB cable
one serial RS232 cable
A Welcome Letter
Figure 2-1. Unpacked SAM3U-EK
Unpack and inspect the kit carefully. Contact your local Atmel distributor, should you have issues con-
cerning the contents of the kit.

Kit Contents
2-2 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
2.2 Electrostatic Warning
The SAM3U-EK board is shipped in a protective anti-static package. The board must not be subjected to
high electrostatic potentials. A grounding strap or similar protective device should be worn when han-
dling the board. Avoid touching the components or any other metallic element of the board.

SAM3U-EK Development Board User Guide 3-1
6478B–ATARM–05-Oct-09
Section 3
Power Up
3.1 Power up the Board
Unpack the board taking care to avoid electrostatic discharge. Unpack the power supply, select the right
power plug adapter corresponding to that of your country, and insert it in the power supply.
Connect the power supply DC connector to the board and plug the power supply to an AC power plug.
The board LCD should light up and display a welcome page. Then, click or touch icons displayed on the
screen and enjoy the demo.
3.2 Battery
The SAM3U-EK ships with a 3V coin battery.
This battery is not required for the board to start up.
The coin battery is provided for user convenience in case the user would like to exercise the date and
time backup function of the SAM3U series devices when the board is switched off.
3.3 DevStart
The on-board NAND Flash contains “SAM3U-EK DevStart”.
It is stored in the “SAM3U-EK DevStart” folder on the USB Flash disk available when the SAM3U-EK is
connected to a host computer and you click on the Flash Disk icon of the on-board demo.
Click the file “welcome.html” in this folder to launch SAM3U-EK DevStart.
SAM3U-EK DevStart guides you through installation processes of IAR™EWARM, Keil MDK and GNU
toolkits. Then, it gives you step-by-step instructions on how to rebuild a single example project and how
to program it into the SAM3U-EK. Optionally, if you have a SAM-ICE™, instructions are also given about
how to debug the code.
We recommend that you backup the “SAM3U-EK DevStart” folder on your computer before
launching it.
3.4 Recovery Procedure
The DevStart ends by giving step-by-step instructions on how to recover the SAM3U-EK to the state as it
was when shipped by Atmel.
Follow the instructions if you deleted the contents of the embedded Flash or the NAND Flash and want
to recover from this situation.

Power Up
3-2 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
3.5 Sample Code and Technical Support
After boot up, you can run some sample code or your own application on the development kit. You can
download sample code and get technical support from Atmel website
http://www.atmel.com/products/at91/sam3landing.asp?family_id=605
Figure 3-1. Atmel Website for SAM3U Series

SAM3U-EK Development Board User Guide 4-1
6478B–ATARM–05-Oct-09
Section 4
Evaluation Kit Hardware
4.1 Board Overview
This section introduces the Atmel SAM3U Evaluation Kit design. It introduces system-level concepts,
such as power distribution, memory, and interface assignments.
The SAM3U-EK board is based on the integration of an ARM®Cortex®-M3 processor with on-board fast
PSRAM (pseudo-static RAM), NAND-Flash and a set of popular peripherals. It is designed to provide a
high performance processor evaluation solution with high flexibility for various kinds of applications.
Figure 4-1. SAM3U-EK Block Diagram
PIO
SAM3U-LQFP144
SAM3U
SWJ-DPUART
System Controller
System Controller
External Memory
External Memory
EBI / 3.3v
EBI / 3.3v
PSRAM
NAND
FLASH
Multimédia Cards Interface
Multimedia Cards Interface
MCI
MCI
USART
USART USB
USB
Device
Device
PIO
PIO
TWI
TWI
oooooooo
oooooooo
4/8 bits
interface
SD/MMC
Micro
Line In
HeadPh
oooooooo
oooooooo
LCD TFT
240 * 320
LCD TFT
240 * 320
PWM
PWM
RS232
Codec
WM8731
Led
User I/OAudioMultimedia CardTFT LCDMain Memory
Touch
Screen
Touch
Screen
BNC * 2VCC 5V JTAGRS232USB Device
High / Full
RS232ZIGBEET°
Power /
Shdn
Push Btn
ADS7843
ADS7843
HX8347
HX8347
SPI
SPI
CD
SSC
SSC
ooooo
ooooo
ZIGBEE
ZIGBEE
Analog
Analog
TWI
TWI
MCP9800
Back Light
AAT3194
RS232

Evaluation Kit Hardware
4-2 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
4.2 Features List
Here is the list of the main board components and interfaces:
SAM3U4E QFP chip with optional socket footprint
12 MHz crystal
32.768 KHz crystal
Optional SMB connector, for external system clock input
PSRAM
NAND-Flash
Backup Battery
2.8 inch TFT color LCD display with touch-panel and backlight
UART port with level shifter IC
USART port with level shifter IC
Audio codec with input and output jacks: stereo headphone out, stereo line in, mono microphone in
SD/MMC interface
3-D accelerometer sensor
Temperature sensor
Reset and Wake-Up buttons: NRST, NRSTB, FWUP
User buttons: Left and Right
High Speed USB device port
JTAG port
On-board power regulation with shutdown control (by the SAM3 chip)
Two user LEDs
Power LED
BNC connectors for ADC input
User potentiometer connected to the ADC input
ZigBee®connector
3x32 bit PIO connection interfaces (PIOA, PIOB, PIOC)
4.3 Function Blocks
4.3.1 Processor
The SAM3U-EK is equipped with a SAM3U4E in LQFP144 package.
4.3.2 Memory
The SAM3U4E chip embeds:
256 Kbytes of embedded Flash
48 Kbytes of embedded SRAM with dual bank
16 Kbytes of ROM with embedded bootloader routines (UART, USB) and IAP (In-Application
Programming functions) routines.

Evaluation Kit Hardware
SAM3U-EK Development Board User Guide 4-3
6478B–ATARM–05-Oct-09
The SAM3U4E features an External Bus Interface (EBI) that permits interfacing to a broad range of
external memories and virtually to any parallel peripheral. The SAM3U-EK board is equipped with two
kinds of memory devices connected to the SAM3U4E EBI:
One PSRAM (Micron MT45V512KW16PEGA 512K*16, 48-ball VFBGA), 16 bits data interface
One NAND-Flash MT29F2G16ABD.
Figure 4-2. PSRAM
PB9
PB10
PB11
PB12
PB16
PB13
PB15
PB14
PB28
PB25
PB27
PB6
PB29
PB26
PB30
PB31
PC2
PC20
PC1
PC6
PC3
PC0
PC21
PC4
PC8
PC10
PC22
PC5
PC11
PC7
PC9
PC25
PC24
PC23
PB19
PB23
PC15
PB8
PB7
PB19
PB20
PB23
PB7
PB20
+3V3+3V3
+3V 3
DGND
PB[31:0]
PC[31:0]
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D1 0
D11
D1 2
D13
D14
D1 5
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
NBS 0
NBS 1
NCS0
NR D
NWE
C28
100nF
C28
100nF
R1
0
47K
R1
0
47K
JP12
JP
JP12
JP
C29
1uF
C29
1uF
R1
1
47K
R1
1
47K
MN2
MT45V512K W16PE G A
MN2
MT45V512K W16PE G A
A0
3
A1
4
A2
5
A3
9
A4
10
A5
15
A6
16
A7
22
A8
44
A9
45
A10
46
A11
47
A12
39
A13
40
A14
33
A15
34
A16
28
A17
21
A18
43
DQ0 12
DQ1 17
DQ2 18
DQ3 23
DQ4 29
DQ5 35
DQ6 36
DQ7 42
DQ8 7
DQ9 13
DQ10 14
DQ11 20
DQ1226
DQ13 32
DQ14 31
DQ15 37
LB#
1
UB#
8
CE#
11
OE#
2
WE#
41
NC127
NC2 38
NC3 48
VCC 24
VCCQ 25
VSS30
VSSQ19
ZZ#
6

Evaluation Kit Hardware
4-4 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
Figure 4-3. NAND-Flash
The chip select signals NCS0 and NCS1 are used for PSRAM and NAND-Flash chips selection, respec-
tively. Furthermore, a dedicated jumper can disconnect these from the memories, to let NCS0 and NCS1
be used for other custom purpose.
4.3.3 Clock Circuitry
The clock generator of a SAM3U4E microcontroller is made up of:
A Low Power 32,768 Hz Slow Clock Oscillator with bypass mode
A 3 to 20 MHz Crystal Oscillator, which can be bypassed (12 MHz needed in case of USB)
A factory programmed fast internal RC Oscillator. 3 output frequencies can be selected: 4, 8 or
12 MHz (default value is 4 MHz).
A 480 MHz UTMI PLL providing a clock for the USB High Speed Device Controller
A 96 to 192 MHz programmable PLL (input from 8 to 16 MHz), capable of providing the clock MCK to
the processor and to the peripherals.
The SAM3U-EK board is equipped with one 12 MHz crystal, one 32,768 Hz crystal and an external clock
input connector (optional, not populated by default).
PB21
PB22
PB18
PB17
PB24
PB6
PB31
PB30
PB16
PB15
PB14
PB13
PB29
PB28
PB12
PB11
PB10
PB9
PB27
PB26
PB25
PC12
+3V 3 +3V3
+3V 3
DGND
+3V 3
DGND
+3V 3
PB[31:0]
PC[31:0]
NANDR DY
NANDOE
NANDCLE
NANDAL E
NANDWE
NCS 1
R18
DNP
R18
DNP
C30
100nF
C30
100nF
C33
100nF
C33
100nF
C31
100nF
C31
100nF
R17 47K R17 47K
R13
47K
R13
47K
R12
47K
R12
47K
C32
100nF
C32
100nF
R14 0R R14 0R
JP13
JP
JP13
JP
MN3
MT29F2G16AADWP
MN3
MT29F2G16AADWP
NC1
1
NC2
2
NC3
3
NC4
4
NC5
5
NC6
6
R/B#
7
RE#
8
CE#
9
NC7
10
NC8
11
VCC1
12
VSS1
13
NC9
14
NC10
15
CLE
16
ALE
17
WE#
18
WP#
19
NC11
20
NC12
21
NC13
22
NC14
23
NC15
24 VSS2 25
IO8 26
IO9 27
IO10 28
IO0 29
IO1 30
IO2 31
IO3 32
IO11 33
VCC2 34
NC16 35
VSS3 36
VCC3 37
NC17 38
VCC4 39
IO12 40
IO4 41
IO5 42
IO6 43
IO7 44
IO13 45
IO14 46
IO15 47
VSS4 48

Evaluation Kit Hardware
SAM3U-EK Development Board User Guide 4-5
6478B–ATARM–05-Oct-09
Figure 4-4. External Clock Source
4.3.4 Reset and Wake-Up Circuitry
The on-board NRST button BP1 and NRSTB button BP2 provide the SAM3U4E with external reset con-
trol. The on-board WAKE-UP button BP3 can be used to wake up the chip from low power modes.
Figure 4-5. System Buttons
The NRST pin is bidirectional. It is handled by the on-chip reset controller. It can be driven low to provide
a reset signal out to the external components. Conversely, it can be asserted low from the outside to
reset the microcontroller, its core and peripherals, Backup region (RTC, RTT and Supply Controller)
excepted. The NRST pin integrates a permanent pull-up resistor of about 100 kOhm to VDDIO.
On the SAM3U-EK board, the NRST signal is connected to the LCD module and JTAG port.
The NRSTB pin is an input-only signal that enables the asynchronous reset of the SAM3U4E series
when asserted low. The NRSTB pin integrates a permanent pull-up resistor of about 15 kOhm. This
allows the connection of a simple push button for implementing a system-user reset. Whatever the
mode, this pin will reset the chip including the Backup region (RTC, RTT and Supply Controller). It
makes the chip behave as for a Power-on reset. An external capacitor (10 nF) is connected between
NRSTB and VDDIO to enforce the signal stability on this pin.
XIN32
XIN1
XOUT32
XOUT1
XOUT1
XIN1
XOUT32
XIN32
DGND
DGND
DGND
DGND
XIN
XOUT
XIN32
XOUT32
C26
20pF
C26
20pF
R7 0RR7 0R
Y1
12.000MHz
Y1
12.000MHz
C25
20pF
C25
20pF
MN1B
SAM3U
MN1B
SAM3U
XIN32
144
XOUT32
143
XIN
36
XOUT
35
GND1
18
GNDPLL
33
GNDUTMI
43
GND2
52
GND3
60
GNDANA
75
GND4
90
GND5
126
GNDBU
140
C27
20pF
C27
20pF
R60 RR 60 R
Y2
32.768KHz
Y2
32.768KHz
1 2
3
C24
20pF
C24
20pF
J1 J1
1
2 3
5
4
R8 DNPR8 DNP
DGND
VBU
NR ST
NR STB
FWUP
W
AKE_UP#
BP2B P2
1
42
3
BP1B P1
1
42
3
BP3B P3
1
42
3
R65
100K
R65
100K

Evaluation Kit Hardware
4-6 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
The FWUP pin is Force Wake-Up active low input. It is enabled as a wake-up source with external pull-
up. If the FWUP pin is asserted for a time longer than the debouncing period (configurable for 100 µs,
1ms, 16 ms, 128 ms or 1 second), a core power supply wake-up is initiated.
4.3.5 Power Supply and Management
The SAM3U-EK board is supplied with an external 5V DC block through input J11. Protection circuitry is
obtained by a PolyZen diode MN13 and an LC combinatory filter MN14.
The adjustable LDO regulator MN12 is employed for the main supply of the 3.3V rail. It powers all the
3.3V board components. The shut down control of this LDO is made by MOSFETs Q1, Q2 piloted by the
SAM3U4E SHDN pin. When SAM3U4E is in backup mode, SHDN pin outputs a low level signal, which
shuts down the LDO. When the device is running (not in backup mode), SHDN pin output a high level
signal, which enables the LDO.
By closing the “FORCE POWER ON” jumper JP17, the P-channel MOSFET Q1 will be forced on, no
matter the level present on the SHDN pin, and the LDO 3.3V output will thereby be forced active.
Figure 4-6. Power Block
The SAM3U-EK board uses the 3.3V LDO output as its main supply source. VDDUTMI, VDDANA,
VDDIO, VDDIN are powered directly from that source.
The internal 1.8V regulator output feeds VDDCORE and VDDPLL.
VDDCORE and VDDPLL can also be powered by an external supply. (Refer to the SAM3U datasheet for
more details).
VDDBU pin is powered from the 3.3V rail and a backup battery BT1 via a dual Schottky diode D6.
PWR_CN
PWR_
CN
DGND
+5V +5V
DGND
+3V 3
+5V
DGND
DGND
+3V3 +5V
DGND
DGND
SHDN
D12BVREF
ADVREF
+3V3
+3V3
+2V5
+2V5
C92
100nF
C92
100nF
C104
100nF
C104
100nF
MN13
ZEN056V130A24LS
MN13
ZEN056V130A24LS
1
2
3
+
C95
100uF
+
C95
100uF
R90
4.7K
R90
4.7K
MN12
MIC29152WU
Micrel's 1.5A LDO, TO263-5
MN12
MIC29152WU
Micrel's 1.5A LDO, TO263-5
VIN
2VOUT 4
SD
1
GND1
3
ADJ 5
GND2
6
C96
100nF
C96
100nF
TP3
+3V 3
TP3
+3V 3
R80
10K
R80
10K
Q2
IRLM L2502
Q2
IRLM L2502
1
3
2
JP20
JUMP_3
JP20
JUMP_3
1
2
3
R7
7
200R 1%
R7
7
200R 1%
JP17
JP
JP17
JP
C94
15pF
C94
15pF
TP4
+5V
TP4
+5V
MN14
BNX002-01
MN14
BNX002-01
SV
1
SG
2
CV3
CG1 4
CG2 5
CG3 6
+
C93
22uF
+
C93
22uF
R79
100K
R79
100K
C103
100nF
C103
100nF
R78
100K
R78
100K
JP5
JUMP_3
JP5
JUMP_3
1
2
3
J11
MP179P 2.1mm
J11
MP179P 2.1mm
1
2
3
R76
330R 1%
R76
330R 1%
MN15
LM4040-2.5
MN15
LM4040-2.5
Q1
IRLML6401
Q1
IRLML6401
1
3
2

Evaluation Kit Hardware
SAM3U-EK Development Board User Guide 4-7
6478B–ATARM–05-Oct-09
Figure 4-7. Backup Battery
4.3.6 UART
The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for com-
munication and trace purposes. It offers an ideal channel for in-situ programming solutions. This UART
is associated with two PDC channels to reduce the processor time on packet handling.
This two-pin UART (TXD and RXD only) is buffered through an RS232 Transceiver MN6 and brought to
the DB9 male connector J3.
Figure 4-8. UART
4.3.7 USART
The Universal Synchronous/Asynchronous Receiver Transmitter (USART) provides one full duplex uni-
versal synchronous/asynchronous serial link. The data frame format is extensively configurable (data
length, parity, number of stop bits) to support a broad range of serial communication standards. The
USART is also associated with PDC channels for TX/RX data access.
There are 3 USARTs on the SAM3U4E device, SAM3U-EK connects the USART1 bus (including TXD,
RXD, RTS, CTS handshake signals control) to the DB9 male connector J4 through the RS232 Trans-
ceiver MN7.
+3V 3
DGND
VBU
DGND
D6
BAT54C
D6
BAT54C
3
2
1
MN1B
SAM3U
MN1B
SAM3U
VDDBU 139
CR1225
3V
BT1
KY001
CR1225
3V
BT1
KY001
+
1-2
3
344
C21
1uF
C21
1uF
JP4
JP
JP4
JP
PA12
PA11
DGND
+3V3
DGND
+3V3+3V3
PA[31:0]
UT XD
URXD
C45
100nF
C45
100nF
C44
100nF
C44
100nF
C46
100nF
C46
100nF
R330RR330R
MN6
MAX3232C S E
MN6
MAX3232C S E
T1IN
11
T2IN
10 R1OUT
12
R2OUT
9
T1OUT 14
T2OUT 7
R1IN 13
R2IN 8
V+
2
C1+ 1
C1- 3
C2+ 4
C2- 5
V-
6
VCC
16
GND
15
C48
100nF
C48
100nF
R3
1
100K
R3
1
100K
J3
MALE R IG HT ANG LE D
J3
MALE R IG HT ANG LE D
5
4
3
2
1
9
8
7
6
10 11
C47
100nF
C47
100nF
R1
030RR1 030R
TP17
SM
D
TP17
SM
D
TP18
SMD
TP18
SMD
R32
100K
R32
100K

Evaluation Kit Hardware
4-8 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
Figure 4-9. USART
4.3.8 LEDs
There are three LEDs on the SAM3U-EK board:
D2 and D3 green LEDs are user defined and controlled by the GPIO.
D4 red LED is a power LED indicating that the 3.3V rail is enabled. It can also be controlled by the
GPIO (by default, the GPIO is disabled and an on-board pull-up to 3.3V lights the LED).
Figure 4-10. LEDs
4.3.9 LCD, Backlight Control and Touch Panel
SAM3U-EK carries one TFT/Transmissive LCD module with touch screen, FTM280C12D, with inte-
grated driver IC HX8347. The LCD display size is 2.8 inches, with a native resolution of 240 x 320 pixels.
PA22
PA21
PA20
PA23
+3V3
DGND
DGND
+3V3+3V3
PA[31:0]
TXD1
RXD1
RTS1
CTS1
TP20
SM
D
TP20
SM
D
C52
100nF
C52
100nF
C50
100nF
C50
100nF
MN7
MAX3232C S E
MN7
MAX3232C S E
T1IN
11
T2IN
10R1
OUT
12
R2
OUT
9
T1OUT 14
T2OUT 7
R1IN13
R2
IN8
V+
2
C1+ 1
C1- 3
C2+ 4
C2- 5
V-
6
VCC
16
GND
15
C51
100nF
C51
100nF
R104 0RR104 0R
C49
100nF
C49
100nF
R1
050R
R1
050R
R3
4
100K
R3
4
100K
C53
100nF
C53
100nF
R3
5
100K
R3
5
100K
J4
MALE R IG HT ANG LE D
J4
MALE R IG HT ANG LE D
5
4
3
2
1
9
8
7
6
10 11
TP19
SMD
TP19
SMD
PB1
PB2
PB0
PB5
PB4
DGND
+3V 3
PB[31:0]
USR_LED1#
USR_LED2#
POWER_LED#
D2 green-led
0603
D2 green-led
0603
R89 100K R89 100K
D4 red-led
0603
D4 red-led
0603
R8
7
220R
R8
7
220R
Q3
IR LML2502
Q3
IR LML2502
1
32
R92
220R
R92
220R
R8
5
220R
R8
5
220R
D3 green-led
0603
D3 green-led
0603

Evaluation Kit Hardware
SAM3U-EK Development Board User Guide 4-9
6478B–ATARM–05-Oct-09
The LCD module gets its reset from NRST. As explained previously, this NRST is shared with the JTAG
port and the push button BP1. The LCD chip select signal is connected to NCS2 (a dedicated jumper can
disable it, making NCS2 available for other custom usage).
The SAM3U4E communicates with the LCD through PIOB where a 16-bit parallel “8080-like” protocol
data bus has to be implemented by software.
Table 4-1. LCD Module Pin Out
Pin Symbol Function
1 GND Ground
2CS ChipSelect
3 RS Register select signal
4 WR Write operation signal
5 RD Read operation signal
6~21 DB0~DB15 Data bus
22~23 NC No connection
24 RESET Reset signal
25 GND Ground
26 X+ Touch panel X_RIGHT
27 Y+ Touch panel Y_UP
28 X- Touch panel X_LEFT
29 Y- Touch panel Y_DOWN
30 GND Ground
31 VDD1 Power supply for digital IO Pad
32 VDD2 Power supply for analog circuit
33~36 A1~A4 Power supply for backlight
37~38 NC No connection
39 K Backlight ground

Evaluation Kit Hardware
4-10 SAM3U-EK Development Board User Guide
6478B–ATARM–05-Oct-09
Figure 4-11. LCD Block
LCD backlight is made of 4 white chip LEDs in parallel, driven by an AAT3194 charge pump, MN4. The
AAT3194 is controlled by the SAM3U4E through a single line Simple Serial Control (S2Cwire) interface,
which permits to enable, disable, and set the LED drive current (LED brightness control) from a 32-level
logarithmic scale. Four 0-Ohm resistors R93/R94/R95/R96 are implemented for optional current limita-
tion (replace 0 Ohm with the required resistor value).
The LCD module integrates a 4-wire touch screen panel controlled by MN5, ADS7843, which is a slave
device on the SAM3U4E SPI bus.
The ADS7843 touch ADC auxiliary inputs IN3/IN4 are connected to test points for optional function
extension.
PB10
PB28
PB31
PB6
X_LEFT
PB13
PB19
PB15
Y_DOWN
PB26
PB11
PB23
PB16
PB29
PB30
PB9
PB8
PB14
CS#
PB27
PB25
X_RIGHT
Y_UP
PB12
PC16
LED_A2
PC19
LED_A1
LED_A4
LED_A3
LED_A1
LED_A2
LED_A3
LED_A4
LED_A1
LED_A2
LED_A3
LED_A4
X_RIGHT
X_LEFT
Y_UP
Y_DOWN
DGND
DGND
+3V3
DGND
VLED
+3V 3
DGND
+3V 3
DGND
PB[31:0]
NR ST
NOT P OPUL AT E D
C34
1uF
C34
1uF
TP14
SMD
TP14
SMD
TP13
SMD
TP13
SMD
TP16
SMD
TP16
SMD
R94 0RR 94 0R
B7
BN03K314S 300R
B7
BN03K314S 300R
D5
PACDN044Y5R
TVS, SOT23-5
D5
PACDN044Y5R
TVS, SOT23-5
1
2
3 4 5
MN4
AAT3194ITP
MN4
AAT3194ITP
C1+
4
C1-
3
EN/SET
9
C2+ 1
C2- 12
OUT 2
IN
10
GND
11
D1 8
D2 7
D3 6
D4 5
R95 0RR95 0R
R19
47K
R19
47K
R20
0R
R20
0R
C35
1uF
C35
1uF
C39
100nF
C39
100nF
J2
FH26-39S -0.3S HW
J2
FH26-39S -0.3S HW
GND1
1
CS
2
RS
3
WR
4
RD
5
DB0
6
DB1
7
DB2
8
DB3
9
DB4
10
DB5
11
DB6
12
DB7
13
DB8
14
DB9
15
DB10
16
DB11
17
DB12
18
DB13
19
DB14
20
DB15
21
NC1
22
NC2
23
RESET
24
GND2
25
X+
26
Y+
27
X-
28
Y-
29
GND3
30
VDD1
31
VDD2
32
A1
33
A2
34
A3
35
A4
36
NC3
37
NC4
38
K
39
shelled1
40
shelled2
41
JP14
JP
JP14
JP
R93 0RR93 0R
R96 0RR96 0R
TP15
SMD
TP15
SMD
+
C38
10uF
+
C38
10uF
C37
1uF
C37
1uF
C36
4.7uF
C36
4.7uF

Evaluation Kit Hardware
SAM3U-EK Development Board User Guide 4-11
6478B–ATARM–05-Oct-09
Figure 4-12. Touch Screen Controller
4.3.10 JTAG
A standard 20-pin JTAG connector is implemented on the SAM3U-EK for any ARM JTAG emulator con-
nection, such as SAM-ICE.
Note that the NRST net is connected to the system button BP1, and is also used to reset the LCD mod-
ule. 0-Ohm resistor R75 may be removed in order to isolate the JTAG port from the system reset signal.
Figure 4-13. JTAG Connector
4.3.11 Audio Codec
The SAM3U-EK includes a WOLFSON codec WM8731 for digital sound input and output. This interface
includes audio jacks for:
microphone input,
line audio input, and
headphone output.
X_RI
GHT
X_RI
GHT
Y_UP
X_LEFT
Y_DOWN
PA13
PA14
PA15
PA2
PA24
PC14
PC14
DGND
+3V3
+3V 3 +3V 3
AGND1
PA[31:0]
PC[31:0]
SPCK
MOS I
M
IS
O
NP CS 2
BUY_TSC
IRQ_
TSC
C43
4.7uF
C43
4.7uF
C40
100nF
C40
100nF
R28
100K
R28
100K
TP2
SMD
TP2
SMD
TP1
SMD
TP1
SMD
R2
70
RR2
70
R
R2
60
RR2
60
R
C41
100nF
C41
100nF
R25 0RR25 0R
R2
9
100K
R2
9
100K
R2
40
RR2
40
R
R22
100K
R22
100K
R3
0
0R
R3
0
0R
C42
100nF
C42
100nF
R21
100K
R21
100K
MN5
ADS 7843E
MN5
ADS 7843E
XP
2
YP
3
XM
4
YM
5
DCLK16
DIN 14
DOUT 12
CS15
BUSY13
PENI RQ11
VREF 9
VCC11
VCC210
GND 6
IN3
7
IN4
8
L1
10uH/100mA
L1
10uH/100mA
R91
1R
R91
1R
X_LEFT
Y_DOWN
Y_UP
J2
FH26-39S -0.3S HW
J2
FH26-39S -0.3S HW
X+
26
Y+
27
X-
28
Y-
29
DGND
DGND
+3V3
NR S T
TDI
TCK
TDO
TMS
R72
100K
R72
100K
R73
100K
R73
100K J10
IDC20-2.54mm
J10
IDC20-2.54mm
VTref
1Vsupply 2
nT R S T
3GND1 4
TDI
5GND2 6
TMS
7GND3 8
TCK
9GND4 10
RTCK
11 GND5 12
TDO
13 GND6 14
nS RST
15 GND7 16
DBG R Q
17 GND8 18
DBGACK
19 GND920
+
C91
10uF
+
C91
10uF
C90
100nF
C90
100nF
R7
1
100K
R7
1
100K
R75 0R R75 0R
R74
100K
R74
100K
R70
100K
R70
100K