Embest EB-SAM3U User manual

EB-SAM3U Development Board User Guide
Rev.1.1
Release: 2011-07-26
Embest info & Tech Co., Ltd.
Address：509 Room, Luohu Sci&Tech Edifice, No.85, Taining Road, Luohu
Zone, Shenzhen
Telephone: [phone] 25505451 25532557
Fax: [phone]
E-mail: [email protected] [email protected]
Website: http://www.embedinfo.com http://www.embed.com.cn

AT91SAM3U4 Chips Based on Atmel
ARM Cortex-M3 Kernel
The EB-SAM3U board is a new evaluation board based on Atmel corp. AT91SAM3U
series prosessors. The board features rich interfaces,which not only provides a good
platform for application development,but also is the first choice for learners. Combining
with our company's debugging tools ULINK2, it will offer your a better development
environment for saving time and improving efficiency.
Deliverables
The EB-SAM3U toolkit contains the following items:
1.a EB-SAM3U board
2.power supply
3.universal input AC/DC power supply with US, Europe and UK plug adapters
4.one 3V Lithium Battery type CR1225
5.one USB cable

目录
CHAPTERIJUMPERS........................................................................................1
CHAPTERIIEVALUATIONKITHARDWARE...............................................................2
2.1BoardOverview..................................................................................................2
2.2EB‐SAM3UBlockDiagram.................................................................................4
2.3Processor............................................................................................................4
2.4Memory..............................................................................................................4
2.5ClockCircuitry....................................................................................................5
2.6ResetandWake‐UpCircuitry............................................................................5
2.7PowerSupplyandManagement.......................................................................5
2.8UART..................................................................................................................5
2.9USART................................................................................................................5
2.10LEDs.....................................................................................................................6
2.11LCD,BacklightControlandTouchPanel............................................................6
2.12JTAG....................................................................................................................7
2.13AudioCodec........................................................................................................7
2.14USB......................................................................................................................7
2.15ADC......................................................................................................................8
2.16UserButtons.......................................................................................................8
2.17TemperatureSensor.........................................................................................8
2.18SDCard................................................................................................................9
2.19HardwareTesting...............................................................................................9
CHAPTERIIISOFTWAREDEVELOPMENTANDEXAMPLES..........................................10
APPENDIXA:AFTER‐SALESERVICE...................................................................13

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1-
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Chapter I Jumpers
The EB-SAM3U board jumpers are used for many purposes such as internal Flash Memory
reinitialization, power current measurement and other configurations.
Table 1. Jumpers Setting
Label Default
Setting Feature
JP1 ERASE Open Close it to reinitialize the Flash content and some
of its NVM bits. This jumper must be closed for
more than 220 ms at power-up to perform the
reinitialization.
JP2 TEST Not
populated
(open)
reserved
JP3 VBU Close
JP4 FORCE
POWER ON Open Close to force +3V3 LDO output valid
JP5 Not
populated
(open)
Close to enable 50-Ohm terminal resistor for
AD12BAD3 BNC port
JP6 Not
populated
(open)
Close to enable 50-Ohm terminal resistor for
AD0 BNC port
JP7 ADVREF Pin1 Pin2
close,Switch
to +3V3
Select the reference voltage of the 10-bit ADC to
be either 3.3V (close 1-2) or 2.5V (close 2-3)
JP8 AD12BVREF Pin1 Pin2
close,Switch
to +3V3
Select the reference voltage of the 12-bit ADC to
be either 3.3V (close 1-2) or 2.5V (close 2-3)

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Chapter ⅡEvaluation Kit Hardware
2.1 Board Overview
Table 2. A List of Hardware Interfaces
J1 TFT LCD Connector
J2 UART DB9 male connector
J3 USART DB9 male connector
J4 HEADPHONE LINE-OUT
J5 Audio LINE-IN
J6 MONO/STEREO MICRO INPUT
J7 SD/MMC Socket
J8 USB Device(B-type) interface
J9 JTAG interface
J10 Power +5V
J11 Power supply by USB
J12 external pins(at the back of the board)
J13 external pins(at the back of the board)

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CN1 BNC interface1 supporting ADC12B
CN2 BNC interface2 supporting ADC0
MN1 SAM3 chip
MN2 PSRAM
MN3 NAND Flash(under the LCD)
MN4 Touch Screen controller(under the LCD)
MN5 RS232 Transceiver 1
MN6 RS232 Transceiver 2
MN7 WM8731 CODEC(under the LCD)
MN8 Temperature Sensor
MN9 USB Slave Device interface
MN10 Voltage Regulator
MN11 LM4040-2.5 PNP
BP1 NRST button
BP2 USR-LEFT button
BP3 NRSTB button
BP4 FWUP button
BP5 USR-RIGHT button

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2.2 EB-SAM3U Block Diagram
2.
2.
3 Processor
The EB-SAM3U is equipped with a AT91SAM3U in LQFP144 package.
4 Memory
The AT91SAM3U 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.
The AT91SAM3U features an External Bus Interface (EBI) that permits interfacing to a
broad range of external memories and virtually to any parallel peripheral. The EB-SAM3U
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.

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2.
2.
2.
2.
2.
5 Clock Circuitry
The clock generator of a AT91SAM3U 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 EB-SAM3U board is equipped with one 12 MHz crystal, one 32,768 Hz crystal and an
external clock input connector (optional, not populated by default).
6 Reset and Wake-Up Circuitry
The on-board NRST button BP1 and NRSTB button BP3 provide the AT91SAM3U with
external reset control.The on-board WAKE-UP button BP4 can be used to wake up the
chip from low power modes.
7 Power Supply and Management
The EB-SAM3U board is supplied with an external 5V DC block through input J10.
It can also be powered by USB, close J11 to the right hand.
8 UART
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 MN5
and brought to the DB9 male connector J2.
9 USART
The Universal Synchronous/Asynchronous Receiver Transmitter (USART) provides one

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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.
There are 3 USARTs on the SAM3U4E device, EB-SAM3U connects the USART1 bus
(including TXD, RXD, RTS, CTS handshake signals control) to the DB9 male connector
J3 through the RS232 Transceiver MN6.
2.
2.
10 LEDs
There are three LEDs on the EB-SAM3U board:
· D3 and D4green LEDs are user defined and controlled by the GPIO.
· D5 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).
11 LCD, Backlight Control and Touch Panel
EB-SAM3U carries one TFT/Transmissive LCD module with touch screen, FTM280C12D,
with integrated driver IC HX8347. The LCD display size is 2.8 inches, with a native
resolution of 240 x 320 pixels.
Table 3. LCD Module Pin Out
Pin Symbol Function
1 GND Ground
2 CS Chip Select
3 RS Register select signal
4 WR Write operation signal
5 RD Read operition signal
6~21 DB0~DB15 Data bus
22~23 NC No connection
24 RESET Reset signal
25 GND Ground
26 X+ Touch panel Y_RIGHT
27 Y+ Touch panel Y_UP
28 X- Touch panel Y_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

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2.
2.
12 JTAG
A standard 20-pin JTAG connector is implemented on the EB-SAM3U for any ARM JTAG
emulator connection, such as SAM-ICE.
Note that the NRST net is connected to the system button BP1, and is also used to reset
the LCD module. 0-Ohm resistor R75 may be removed in order to isolate the JTAG port
from the system reset signal.
13 Audio Codec
The EB-SAM3U includes a WOLFSON codec WM8731 for digital sound input and output.
This
interface includes audio jacks for:
· microphone input,
· line audio input,
· headphone output.
The AT91SAM3U programmable clock output is used to generate the WM8731 master
clock (MCLK). The AT91SAM3U ODT (On-Die Termination) feature guarantees a signal
integrity on this clock line without the need for external discrete components.
WM8731 pin 21 MODE is pulled down by default; this configures the device as a TWI
device for internal register access.
Pin15 CSB is pulled up, which sets its TWI address as 33 [0x0011011].
The WM8731 digital interface works in slave mode on the AT91SAM3U Synchronous
Serial Controller (SSC) interface, which means that Codec digital audio bit clock and
ADC/DAC left/right control clock are to be generated by the AT91SAM3U.
Figure 1. Codec Slave Mode
2.14 USB
The AT91SAM3U UDPHS port is compliant with the Universal Serial Bus (USB) rev 2.0
High Speed device specification. J8 is a B-type receptacle for USB device.