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SAM3S-EK
User guide
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Atmel SAM3S-EK User guide

SAM3S-EK Development Board
....................................................................................................................
User Guide
11031C–ATARM–30-Mar-11
Section 1
Introduction.................................................................................................................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 ......................................................................................................... 2-2
Section 3
Power Up....................................................................................................................3-1
3.1 Power up the Board ...........................................................................................................3-1
3.2 DevStart ............................................................................................................................. 3-1
3.4 Sample Code and Technical Support ................................................................................ 3-1
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...................................................................................................... 4-3
4.3.4 Reset Circuitry ..................................................................................................... 4-4
4.3.5 Power Supply and Management.......................................................................... 4-4
4.3.6 UART ................................................................................................................... 4-5
4.3.7 USART................................................................................................................. 4-5
4.3.8 Display Interface .................................................................................................. 4-6
4.3.9 JTAG/ICE............................................................................................................. 4-8
4.3.10 Audio Interface..................................................................................................... 4-9
4.3.11 USB Device ....................................................................................................... 4-10
4.3.12 Analog Interface ................................................................................................ 4-11
4.3.13 QTouch Elements .............................................................................................. 4-12
4.3.14 User Buttons ...................................................................................................... 4-13
4.3.15 LEDs .................................................................................................................. 4-13
4.3.16 SD/MMC Card ................................................................................................... 4-14
4.3.17 ZigBEE............................................................................................................... 4-14
4.3.18 PIO Expansion ................................................................................................... 4-14
SAM3S-EK Development Board User Guide 1-1
11031C–ATARM–30-Mar-11
4.4 Configuration.................................................................................................................... 4-15
4.4.1 PIO Usage ......................................................................................................... 4-15
4.4.2 Jumpers ............................................................................................................. 4-19
4.4.3 Test Points ......................................................................................................... 4-20
4.4.4 Solder Drops ...................................................................................................... 4-20
4.4.5 Assigned PIO Lines, Disconnection Possibility.................................................. 4-20
4.5 Connectors....................................................................................................................... 4-22
4.5.1 Power Supply Connector J9 .............................................................................. 4-22
4.5.2 USART Connector J5 With RTS/CTS Handshake Support ............................... 4-22
4.5.3 UART Connector J7 .......................................................................................... 4-23
4.5.4 USB Device Connector J15 ............................................................................... 4-23
4.5.5 TFT LCD Connector J8...................................................................................... 4-24
4.5.6 JTAG Debugging Connector J6 ......................................................................... 4-24
4.5.7 SD/MMC - MCI Connector J3 ............................................................................ 4-27
4.5.8 Analog Connector CN1 & CN2 .......................................................................... 4-27
4.5.9 RS485 Connector J14 ....................................................................................... 4-28
4.5.10 Headphone Connector J11 ................................................................................ 4-28
4.5.11 ZigBEE Connector J16 ...................................................................................... 4-28
4.5.12 PIO Expansion Port C Connector J12 ............................................................... 4-29
4.5.13 PIO Expansion Port A Connector J13 .............................................................. 4-30
4.5.14 PIO Expansion Port B Connector J14 ............................................................... 4-31
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
1-2 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11

1.1 SAM3S Evaluation Kit

The SAM3S Evaluation Kit (SAM3S-EK) enables evaluation capabilities and code development of appli­cations running on a SAM3S4C device.

1.2 User Guide

This guide focuses on the SAM3S-EK board as an evaluation platform. It is made up of 6 sections:
Section 1 includes references, applicable documents, acronyms and abbreviations.
Section 2 describes the kit contents, its main features and specifications.
Section 3 provides board specifications.
Section 4 describes the development environment.
Section 5 provides instructions to power up the SAM3S-EK and describes how to use it.
Section 6 describes the hardware resources, default jumper and switch settings, and connectors.
Section 7 provides schematics.
Section 8 describes the troubleshooting.

Section 1

Introduction

1.3 References and Applicable Documents

Table 1-1. References and Applicable Documents
Title Comment
SAM3S Datasheet
SAM3S-EK Development Board User Guide 1-1
http://www.atmel.com/dyn/products/datasheets.asp?family_id=605#2127
11031C–ATARM–30-Mar-11

2.1 Deliverables

The Atmel® SAM3S-EK toolkit contains the following items:
Board:
– a SAM3S-EK board
– a universal input AC/DC power supply with US, Europe and UK plug adapters
Cables:
– one USB cable
– one serial RS232 cable
A Welcome Letter
Figure 2-1. Unpacked SAM3S-EK

Section 2

Kit Contents

Unpack and inspect the kit carefully. Contact your local Atmel distributor, should you have issues con­cerning the contents of the kit.
SAM3S-EK Development Board User Guide 2-1
11031C–ATARM–30-Mar-11
Kit Contents

2.2 Electrostatic Warning

The SAM3S-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 han­dling the board. Avoid touching the components or any other metallic element of the board.
2-2 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11

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 DevStart

The on-board NAND Flash contains “SAM3S-EK DevStart”.
It is stored in the “SAM3S-EK DevStart” folder on the USB Flash disk available when the SAM3S-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 SAM3S-EK DevStart.

Section 3

Power Up

SAM3S-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 SAM3S-EK. Optionally, if you have a SAM-ICE™, instructions are also given about how to debug the code.
We recommend that you backup the “SAM3S-EK DevStart” folder on your computer before launching it.

3.3 Recovery Procedure

The DevStart ends by giving step-by-step instructions on how to recover the SAM3S-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.
SAM3S-EK Development Board User Guide 3-1
11031C–ATARM–30-Mar-11
Power Up

3.4 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/dyn/products/tools_card.asp?tool_id=4678
Figure 3-1. Atmel Website for AT91SAM Products
3-2 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11

4.1 Board Overview

This section introduces the Atmel SAM3S Evaluation Kit design. It introduces system-level concepts, such as power distribution, memory, and interface assignments.
The SAM3S-EK board is based on the integration of an ARM 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. SAM3S-EK Block Diagram

Section 4

Evaluation Kit Hardware

®
Cortex®-M3 processor with on-board
SAM3S-EK Development Board User Guide 4-1
11031C–ATARM–30-Mar-11
Evaluation Kit Hardware

4.2 Features List

Here is the list of the main board components and interfaces:
SAM3S4C chip LQFP100 package with optional socket footprint
12 MHz crystal
32.768 KHz crystal
Optional SMB connector for external system clock input
NAND Flash
2.8 inch TFT color LCD display with touch panel and backlight
UART port with level shifter circuit
USART port with level shifter circuit multiplexed with RS485 port with level shifter circuit
Microphone input and mono/stereo headphone jack output
SD/MMC interface
Reset button: NRST
User buttons: Left and Right
QTouch
Full Speed USB device port
JTAG/ICE port
On-board power regulation
Two user LEDs
Power LED
BNC connector for ADC input
BNC connector for DAC output
User potentiometer connected to the ADC input
ZigBEE connector
2x32 bit PIO connection interfaces (PIOA, PIOC) and 1x16 bit PIO connection interface (PIOB)
®
buttons: Up, Down, Left, Right, Valid and Slider

4.3 Function Blocks

4.3.1 Processor
The SAM3S-EK is equipped with a SAM3S4C device in LQFP100 package.
4.3.2 Memory
The SAM3S4 chip embeds:
256 Kbytes of embedded Flash
48 Kbytes of embedded SRAM
16 Kbytes of ROM with embedded BootLoader routines (UART, USB) and In-Application Programming
functions (IAP) routines.
4-2 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11
Evaluation Kit Hardware
MT29F2G08AADWP
PC7
PC6
PC5
PC4
PC3
PC2
PC1
PC0
PC10
PC9
PC16
PC17
PC1
8
PC1
4
+
3V3
DGND
+3V3
DGND
+3V3
+3
V3
PC[0..31
]{3,5,7
}
MN3MN3
W
E
18
N.C
6
6
VCC
37
CE
9
RE
8
N.C11
20
W
P
1
9
N.C
5
5
N.C1
1
N.C2
2
N.C3
3
N.C
4
4
N.C12
2
1
N.C
13
2
2
N.C14
23
N.C15
24
R
/B
7
N.C17
26
N
.C18
27
N
.C19
28
I/O0
29
N
.C21
34
N
.C22
35
VSS
3
6
PR
E
3
8
N.C2
3
3
9
VCC
12
VSS
1
3
AL
E
17
N.C
8
11
N.C
7
1
0
N.C9
14
N.C10
15
CLE
16
N.C16
25
N
.C20
33
I/O1
30
I/O3
32
I/O2
31
N.C2
7
47
N.C2
6
46
N.C2
5
4
5
I/O7
44
I/O6
4
3
I/O5
42
I/O4
41
N.C2
4
4
0
N
.C28
48
C2
7
100nF
C2
7
100nF
R15 47K
R15 47K
R2147KR2147K
R1
6
47K
R1
6
47K
C29 1uF
C29 1uF
R190
R
R190
R
R22 DN
P
R22 DN
P
JP9J
P9
C
28
100nF
C
28
100nF
NOT POPULATE
D
D
NP
XOUT32
XIN32
XIN
32
XOUT32
PA7 PA8
XIN
XO
UT
PB8
PB9
DGND
DG
ND
DGND
DGND
DGND
R
3 DNP
R
3 DNP
R6 DN
P
R6 DN
P
R
9D
NPR
9D
NP
R1 DNPR1 DNP
C
3
20pF
C
3
20pF
R40RR40R
C4 20pFC420pF
R2
49.9R 1%R249.9R 1%
Y1Y1
12
3
R8 DN
P
R8 DN
P
R
7DN
PR
7DN
P
AT91SAM3S
MN1
AT91SAM3S
MN1
PA7_RTS0_PWMH3
49
PA8_CTS0_AD
12BTRG
4
8
PB8_XO
U
T
96
PB9_XIN
97
R1
1
0R
R1
1
0R
Y
212MHz
Y
212MHz
C
120pF
C
120pF
R10DNPR10DNP
Y3
32.768KHz
Y3
32.768KHz
12
3
R50
R
R50
R
R12 0
R
R12 0
R
J1J1
1
2 3
54
C
220pF
C
220pF
The SAM3S features an External Bus Interface (EBI) that permits interfacing to a broad range of external memories and virtually to any parallel peripheral. The SAM3S-EK board is equipped with a memory device connected to the SAM3 EBI:
One NAND Flash MT29F2G08AADWP.
Figure 4-2. NAND Flash
NCS0 chip select signal is used for NAND Flash chip selection. Furthermore, a dedicated jumper can disconnect it from the on-board memories, thereby letting NCS0 free for other custom purpose.
4.3.3 Clock Circuitry
The clock generator of a SAM3S 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 (default
value), 8 or 12 MHz.
A 60 to 130 MHz PLL (PLLB) providing a clock for the USB Full Speed Controller.
A 60 to 130 MHz programmable PLL (PLLA), capable to provide the clock MCK to the processor and
to the peripherals. The input frequency of PLLA is from 7.5 and 20 MHz.
The SAM3S-EK board is equipped with one 12 MHz crystal, optional Piezoelectric Ceramic Resonator 12 Mhz (Murata ref. CSTCE12M0G15L99-R0), one 32.768 Hz crystal and an external clock input con­nector (optional, not populated by default).
Figure 4-3. External Clock Source
SAM3S-EK Development Board User Guide 4-3
11031C–ATARM–30-Mar-11
Evaluation Kit Hardware
DGND
+
5V
+5V +3V3
C75 100uF
+
C75 100uF
C65 22uF
+
C65 22uF
C64 100nF
C64 100nF
MN10 BN
X002-01
MN10 BN
X002-01
SV
1
SG
2
C
V
3
CG
1
4
CG2
5
CG3
6
C76 100nF
C76 100nF
C66 22u
F
+
C66 22u
F
MN9 ZEN056V130A24LS
MN9 ZEN056V130A24LS
1
2
3
R92 102K
1%
R92 102K
1%
MN12 MIC29152WU
Mic
rel's 1.5A LDO, TO263-5
MN12 MIC29152WU
Mic
rel's 1.5A LDO, TO263-5
VI
N
2
VOUT
4
SD
1
GND1
3
ADJ
5
GND2
6
R89 169K 1%
R89 169K 1%
J9
MP179P 2.1mm
J9
MP179P 2.1mm
1 2
3
The SAM3S chip internally generates the following clocks:
SLCK, the Slow Clock, which is the only permanent clock of the system
MAINCK, the output of the Main Clock Oscillator selection: either a Crystal Oscillator or a 4/8/12 MHz
Fast RC Oscillator
PLLACK, the output of the Divider and 60 to 130 MHz programmable PLL (PLLA)
PLLBCK, the output of the Divider and 60 to 130 MHz programmable PLL (PLLB)
4.3.4 Reset Circuitry
On-board NRST button BP1 provides an external reset control of the SAM3S.
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 Core and the peripherals. The NRST pin integrates a permanent pull-up resistor of about 100 kOhm to VDDIO.
On the SAM3S-EK board, the NRST signal is connected to the LCD module and JTAG port.
Note: At power-on, the NRST signal is asserted with a default duration of 2 clock cycles. That duration may not be
sufficient to correctly reset any other system or board devices connected to that signal. First, in your custom application, you need to check for these devices' datasheets about reset duration requirements. Then, you need to set an appropriate configuration in the NRST Manager. This is done through the ERSTL field in the RSTC_MR register. The NRST duration is thereby configurable between 60 µs and 2 s, whether it is subse­quently activated by a software reset or a user reset. Refer to the SAM3S datasheet for in depth information.
4.3.5 Power Supply and Management
The SAM3S-EK board is supplied with an external 5V DC block through input J9. It is protected by a PolyZen diode MN9 and an LC combinatory filter MN10. The PolyZen is used in the event of an incorrect power supply connection.
The adjustable LDO regulator MN12 is used for the 3.3V rail main supply. It powers all the 3.3V compo­nents on the board.
Figure 4-4. Power Block
The SAM3S4/2/1 product series has different types of power supply pins:
VDDIN pin:
Power for the internal voltage regulator, ADC, DAC, and analog comparator power supplies. The voltage ranges from 1.8V to 3.6V.
4-4 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11
4.3.6 UART
+3V3
D
GND
DGND
+
3V3
+3V3
FGND
PA10 PA9
C3
9
100nF
C3
9
100nF
C40 100nF
C40 100nF
T
P5
SMD
T
P5
SMD
J7J7
5
4
3
2
1
9
8
7
6
10
11
R46 100
K
R46 100
K
C38 100nF
C38 100nF
TP6 SM
D
TP6 SM
D
C41 100nF
C41 100nF
R470
R
R470
R
R480
R
R480
R
C42 100nF
C42 100nF
MN6 MAX3232CSE
MN6 MAX3232CSE
T1
IN
1
1
T2
IN
1
0
R1O
UT
1
2
R2O
UT
9
T1OUT
1
4
T2OUT
7
R1IN
1
3
R2I
N
8
V+
2
C1+
1
C1-
3
C2+
4
C2-
5
V-
6
VCC
16
GND
1
5
R
45
100K
R
45
100K
Evaluation Kit Hardware
VDDIO pins:
Power for the Peripherals I/O lines. The voltage ranges from 1.62V to 3.6V.
VDDOUT pin:
Output of the internal voltage regulator.
VDDCORE pins:
Power for the core, including the processor, embedded memories and peripherals. The voltage ranges from 1.62V to 1.95V.
VDDPLL pin:
Power for the PLL A, PLL B and 12 MHz oscillator. The voltage ranges from 1.62V to 1.95V.
Note: VDDPLL should be decoupled and filtered from VDDCORE.
The Universal Asynchronous Receiver Transmitter features a two-pin UART that can be used for com­munication 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 J7.
4.3.7 USART
Figure 4-5. UART
The Universal Synchronous/Asynchronous Receiver Transmitter (USART) provides one full duplex uni­versal 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.
Note: For design optimization purposes, both transmitters have been implemented on the same
PIO lines, that is PA21, 22, 23, 24 25.
To avoid any electrical conflict, the RS485 transceiver is isolated from the receiving line PA21.
SAM3S-EK Development Board User Guide 4-5
Should you need to implement an RS485 channel in place of the RS232, follow the procedure below:
1. make sure your software will permanently set PA23 to a high level - this will permanently disable the
2. solder a shunt resistor in place of R25 (a solder drop will do).
RS232 receiver.
11031C–ATARM–30-Mar-11
Evaluation Kit Hardware
PA2
5
PA2
4
PA2
1
PA2
2
PA23
F
GND
DGND
+3V3
DGND
+
3V3
+
3V3
DGND
R360
R
R360
R
C3
4
100nF
C3
4
100nF
C35 100nF
C35 100nF
C36 100nF
C36 100nF
R3
2
47K
R3
2
47K
MN5 ADM3312EAR
U
MN5 ADM3312EAR
U
C1+
6
C1-
2
0
C2+
2
C2-
4
C3
+
24
C3-
22
VC
C
3
V
+
1
V-
2
1
GND
23
SD
19
EN
5
T1I
N
7
T1OU
T
18
R1IN
15
R1OU
T
10
T2I
N
8
T
2OU
T
17
R2IN
14
R2OU
T
11
T3I
N
9
T
3OU
T
16
R3IN
13
R3O
UT
1
2
R38 0RR38 0R
C31 4
.7u
F
C31 4
.7u
F
C32 1
00nF
C32 1
00nF
R350
R
R350
R
C37 100nF
C37 100nF
C3
3
100nF
C3
3
100nF
J5J5
5
4
3
2
1
9
8
7
6
10
11
R340
R
R340
R
R33 0RR33 0R
R310RR310R
R3747KR3747K
PA2
2
PA2
4
PA2
5
PA2
1
PA2
3
DGND
+3V3
+3V3 +3V3
DGND
FGND
MN4 ADM3485AR
Z
MN4 ADM3485AR
Z
R
O
1
R
E
2
D
E
3
D
I
4
VCC
8
G
ND
5
A
6
B
7
R28
0
R
R28
0
R
R3
0
DNP
R3
0
DNP
J4J4
1
2
3
R29 120
R
R29 120
R
C30 100nF
C30 100nF
R26
0
R
R26
0
R
JP11JP11JP12JP12
JP10JP1
0
R27
0
R
R27
0
R
R23 D
N
P
R23 D
N
P
R25
DN
P
R25
DN
P
R24 D
N
P
R24 D
N
P
4.3.7.1 RS232
SAM3S-EK connects the USART1 bus (including TXD, RXD, RTS, CTS handshake signal controls and EN command) to the DB9 male connector J5 through the RS232 Transceiver MN5.
Figure 4-6. USART
4.3.7.2 RS485
As noticed above, the USART1 is shared with the RS485 port, connected to the transceiver MN4, con­nected to the 3-point connector J4. The design includes selectable jumpers for RS485 bus termination resistors selection (JP10, JP11, JP12).
Figure 4-7. RS485
4.3.8 Display Interface
The SAM3S-EK carries a TFT Transmissive LCD module with touch panel, FTM280C34D. Its integrated driver IC is ILI9325. The LCD display area is 2.8 inches diagonally measured, with a native resolution of 240 x 320 dots.
The LCD module gets reset from the NRST signal. As explained, this NRST is shared with the JTAG port and the push-button BP1. The LCD chip select signal is connected to NCS1; the jumper JP13 can dis­connect it so that this PIO line is available for other custom usage.
The SAM3S communicates with the LCD through PIOC where an 8-bit parallel “8080-like” protocol data bus has to be implemented by software.
4.3.8.1 LCD Module
4-6 SAM3S-EK Development Board User Guide
11031C–ATARM–30-Mar-11
Figure 4-8. LCD Block
LED_
A
LED_
K1
LED_
K2
LED_K
3
LED_
K4
PC13
+
3
V3
+3V3
DG
N
D
DGND
R6
8
0
R
R6
8
0
R
C
5
7
4.7uF
C
5
7
4.7uF
C55 1uF
C55 1uF
MN8 AAT3155ITP-T1
MN8 AAT3155ITP-T1
C1+
1
0
C1-
9
EN/
SET
1
1
C2+
7
C2-
6
O
UTC
P
8
I
N
5
GND
4
D
1
3
D
2
2
D3
1
D
4
1
2
R
64
47
K
R
64
47
K
B1 BN03K314S300
R
B1 BN03K314S300
R
C5
6
1uF
C5
6
1uF
C5
4
1uF
C5
4
1uF
T
P7
SM
D
T
P7
SM
D
PC[0..31]
Evaluation Kit Hardware
V3
+3
+
+
C
C43
C43 10uF
10uF
C 100nF
100nF
5
5
44
44
C4
C4
49
49
R
R
100nF
100nF
47K
47K
NRST
X_RIGHT Y_UP X_L
EFT
Y_DOW
+3V3
DGND
N
R5
R5 10K
10K
R5
R5
4.7K
4.7K
1
PC13 PC22 PC23 PC24 PC2 PC2 PC2 PC2 PC2 PC3 PC31
5 6 7
8
9 0
6
6
RST
N
8
8
5
2
DGND
PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0
PC11
8
PC PC1
PC1
3
4
D
D
1
1
PACDN044Y5R
PACDN044Y5R
TVS, SOT23-5
TVS, SOT23-5
NOT POPULAT
DGND
7
LCD_DB1
LCD_DB1
6
LCD_DB1
5
LCD_DB1
4
LCD_DB1
3 LCD_DB12 LCD_DB11 LCD_DB10
LCD_DB9 LCD_
DB8
LCD_
DB7
LCD_
DB6
LCD_
DB5 LCD_DB4 LCD_
DB3 LCD_DB2 LCD_DB1 LCD_DB0
9
JP13JP13
5
LED_A
R590RR590R
ED_
L
ED_
L
ED_K3
L
ED_K4
L
_UP
Y
_DOWN
Y
RIGHT
X_
LEFT
X_
K1 K2
DGND
J8
J8 FH26-39S-0.3SH
FH26-39S-0.3SH
1
D
VD
2
B17
D
3
B16
D
4
B15
D
5
B14
D
6
B13
D
7
DB12
8
DB11
9
DB10
0
1
DB9
11
DB8
12
B7
D
13
DB6
14
DB5
5
1
DB4
6
1
DB3
17
DB2
18
DB1
19
DB0
20
VDD
21
RD
22
WR
23
RS
24
CS
25
RESET
26
IM0
27
IM1
8
2
ND
G
9
2
ED-A
L
0
3
EDK1
L
1
3
EDK2
L
2
3
EDK3
L
3
3
EDK4
L
4
3
Y+
5
3
Y-
6
3
X+
7
3
X-
8
3
NC
9
3
GND
W
W
2.8" 320x240
PIN 3
PIN 3
PIN 1
PIN 1
PINs
PINs on
on BOT
BOT
9
9
LCD_DB0
LCD_DB4 LCD_DB2 LCD_DB3 LCD_DB1 LCD_DB8 LCD_DB6 LCD_DB7 LCD_DB5
LCD_DB9
TFT
FTM28
FTM28
R61 DNPR61 DNP
1 2
3
4 5
R63DN
R63DN
LCD DI
0C34D-8bi
0C34D-8bi
1 2
3
4 5
SPLAY
t
t
8
7
R
R
A2
A2
6
D
D
NP
NP
8
7
R
R
A3
A3
6
D
D
NP
NP
P
P
DGND
ED
4.3.8.2 Backlight Control
The LCD backlight is made of four integrated white chip-LEDs arranged in parallel. These are driven by an AAT3155 charge pump, MN8.The AAT3155 is controlled by the SAM3S through a single PIO line PC13 interface; the 0 Ohm resistor R68 is mounted in series on this line, which permits to use it for other custom purposes. In that case, the pull-up resistor R64 maintains the charge pump permanently enabled by default.
On the anode drive line, a 0 Ohm resistor R59 is implemented in series for an optional current limitation.
Figure 4-9. Backlight Control
SAM3S-EK Development Board User Guide 4-7
11031C–ATARM–30-Mar-11
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