USER GUIDE
Atmel SAM4L Xplained Pro
Preface
The Atmel® SAM4L Xplained Pro evaluation kit is hardware platform to evaluate
the ATSAM4LC4C microcontroller.
Supported by the Atmel Studio integrated development platform, the kit provides
easy access to the features of the Atmel ATSAM4LC4C and explains how to
integrate the device in a customer design.
The Xplained Pro MCU series evaluation kits include an on-board Embedded
Debugger, and no external tools are necessary to program or debug the
ATSAM4LC4C.
The Xplained Pro extension series evaluation kits offers additional peripherals to
extend the features of the board and ease the development of customer designs.
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Table of Contents
Preface .......................................................................................... 1
1. Introduction .............................................................................. 3
1.1. Features .... .... ....... .... .... ........... .... .... ........... .... .... ....... .... .... .. 3
1.2. Kit overview .. ....... .... .... ........... .... .... ........... .... .... ....... .... .... ... 3
2. Getting Started ........................................................................ 6
2.1. Quick-start ........... .... .... ........... .... .... ....... .... .... ........... .... .... ... 6
2.2. Connecting the kit .. ........... .... .... ....... .... .... ........... .... .... .......... 6
2.3. Design documentation and related links .... .... ........... .... .... ....... ... 6
3. Xplained Pro ............................................................................ 7
3.1. Embedded Debugger ....... .... .... ........... .... .... ........... .... .... ....... . 7
3.2. Hardware Identification System . .... .... ........... .... .... ....... .... .... ..... 7
3.3. Power supply ..... .... .... ........... .... .... ....... .... .... ........... .... .... ..... 8
3.3.1. Measuring SAM4L power consumption .......... .... .... ........ 8
3.4. Standard Headers and Connectors ... .... .... ........... .... .... ........... .. 8
3.4.1. Xplained Pro extension header ... .... ....... .... .... ........... ... 8
3.4.2. Xplained Pro segment LCD extension connector ....... .... .. 9
3.4.3. Power header ........ .... .... ........... .... .... ....... .... .... ....... 10
4. Hardware user guide ............................................................ 11
4.1. Connectors ....... .... .... ........... .... .... ........... .... .... ....... .... .... ..... 11
4.1.1. I/O extension headers .......... .... .... ........... .... .... ....... .. 11
4.1.2. Segment LCD extension connector .... .... ....... .... .... ...... 13
4.2. Peripherals ....... .... .... ........... .... .... ........... .... .... ....... .... .... ..... 14
4.2.1. QTouch button ....... .... .... ........... .... .... ....... .... .... ....... 14
4.2.2. Crystals .... ....... .... .... ........... .... .... ........... .... .... ....... . 14
4.2.3. Mechanical buttons ... .... ........... .... .... ....... .... .... ......... 15
4.2.4. LED .... .... .... ........... .... .... ....... .... .... ........... .... .... ..... 15
4.3. Embedded Debugger implementation .......... .... .... ....... .... .... ..... 15
4.3.1. Serial Wire Debug .... .... .... ....... .... .... ........... .... .... ..... 15
4.3.2. Virtual COM port .... ........... .... .... ........... .... .... ....... .... 15
4.3.3. Atmel Data Gateway Interface .......... .... .... ........... .... .. 16
4.4. Jumper description .... ........... .... .... ....... .... .... ........... .... .... ...... 16
4.4.1. LDO/BUCK Jumper ... .... ....... .... .... ........... .... .... ......... 16
4.4.2. LDO Jumper . .... ....... .... .... ........... .... .... ........... .... .... . 16
4.4.3. VLCD_A and VLCD_BC Jumpers . .... ....... .... .... ........... 16
4.4.4. VCC_MCU Jumper ... .... ........... .... .... ........... .... .... ..... 16
5. Hardware revision history and known issues ........................ 17
5.1. Identifying product ID and revision ...... .... .... ........... .... .... ....... .. 17
5.2. Revision 2 .. ........... .... .... ........... .... .... ....... .... .... ........... .... .... 17
6. Document revision history ..................................................... 18
7. Evaluation board/kit important notice .................................... 19
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1. Introduction
1.1 Features
● Atmel ATSAM4LC4C microcontroller
● Embedded debugger (EDBG)
● USB interface
● Programming and debugging (target) through Serial Wire Debug (SWD)
● Virtual COM-port interface to target via UART
● Atmel Data Gateway interface (DGI) to target via synchronous UART or TWI.
● Four GPIOs connected to target for code instrumentation
● Digital I/O
● Two mechanical buttons (including one reset button)
● One user LED
● Four extension headers
● Segment LCD display header
● USB interface for host and device function (target)
● Touch
● One Atmel QTouch® button
● Three possible power sources
● External power
● Embedded debugger USB
● Target USB
● 12MHz crystal
● 32kHz crystal
1.2 Kit overview
The Atmel SAM4L Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel ATSAM4LC4C.
The kit offers a set of features that enables the SAM4L user to get started using the SAM4L's peripherals right
away and to get an understanding of how to integrate the SAM4L in their own design.
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Figure 1-1. SAM4L Xplained Pro evaluation kit overview.
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Figure 1-2. SAM4L Xplained Pro blockdiagram.
12MHz
POWER-LED
STATUS-LED
EDBG
USB
DEBUG
ID-BUS
POLARITY
PROTECTION
POWER
EXTERN
USB
SAM4L
VUSBD_P5V0
VEXT_P5V0
VUSBT_P5V0
VCC_P5V0
ON/OFF
SWITCH
TOUCH-BUTTON
USER-BUTTON
USER-LED
VREG
P3V3
VCC_TARGET
VLCD_A
VCC_MCU
Target MCU
ATSAM4LC
TARGET
DGI/CDC-BUS
BUCK/LDO
LDO
VLCD_BC
SWD-PROG/DEBUG BUS
RESET
BUTTON
EXT1
EXT2
EXT3
EXT4
SLCD
12MHz32kHz
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2. Getting Started
2.1 Quick-start
3 Steps to start exploring the Atmel Xplained Pro Platform
● Download and install Atmel Studio1.
● Launch Atmel Studio.
● Connect an USB cable to the DEBUG USB port.
2.2 Connecting the kit
When connecting Atmel SAM4L Xplained Pro to your computer for the first time, the operating system will do a
driver software installation. The driver file supports both 32-bit and 64-bit versions of Microsoft® Windows® XP
and Windows 7.
Once connected the green power LED will be lit and Atmel Studio will autodetect which Xplained Pro
evaluation- and extension kit(s) that's connected. You'll be presented with relevant information like datasheets
and kit documentation. You also have the option to launch Atmel Software Framework (ASF) example
applications. The target device is programmed and debugged by the on-board Embedded Debugger and no
external programmer or debugger tool is needed. Please refer to the Atmel Studio user guide2 for information
regarding how to compile and program the kit.
2.3 Design documentation and related links
The following list contains links to the most relevant documents and software for the SAM4L Xplained Pro.
1. Xplained Pro products 3 - Atmel Xplained Pro is a series of small-sized and easy-to-use evaluation kits
for 8- and 32-bit Atmel microcontrollers. It consists of a series of low cost MCU boards for evaluation and
demonstration of features and capabilities of different MCU families.
2. SAM4L Xplained Pro User Guide 4 - PDF version of this User Guide.
3. SAM4L Xplained Pro Design Documentation 5 - Package containing schematics, BOM, assembly
drawings, 3D plots, layer plots etc.
4. Atmel Studio 6 - Free Atmel IDE for development of C/C++ and assembler code for Atmel
microcontrollers.
5. IAR Embedded Workbench® 7 for ARM®. This is a commercial C/C++ compiler that is available for
ARM. There is a 30 day evaluation version as well as a code size limited kick-start version available from
their website. The code size limit is 16K for devices with M0, M0+ and M1 cores and 32K for devices with
other cores.
6. Atmel sample store 8 - Atmel sample store where you can order samples of devices.
1
http://www.atmel.com/atmelstudio
2
http://www.atmel.com/atmelstudio
3
http://www.atmel.com/XplainedPro
4
http://www.atmel.com/Images/Atmel-42074-SAM4L-Xplained-Pro_User-Guide.pdf
5
http://www.atmel.com/Images/Atmel-42074-SAM4L-Xplained-Pro_User-Guide.zip
6
http://www.atmel.com/atmelstudio
7
http://www.iar.com/en/Products/IAR-Embedded-Workbench/ARM/
8
http://www.atmel.com/system/samplesstore
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3. Xplained Pro
Xplained Pro is an evaluation platform that provides the full Atmel microcontroller experience. The platform
consists of a series of Microcontroller (MCU) boards and extension boards that are integrated with Atmel
Studio, have Atmel Software Framework (ASF) drivers and demo code, support data streaming and more.
Xplained Pro MCU boards support a wide range of Xplained Pro extension boards that are connected through
a set of standardized headers and connectors. Each extension board has an identification (ID) chip to uniquely
identify which boards are mounted on a Xplained Pro MCU board. This information is used to present relevant
user guides, application notes, datasheets and example code through Atmel Studio. Available Xplained Pro
MCU and extension boards can be purchased in the Atmel Web Store1.
3.1 Embedded Debugger
The SAM4L Xplained Pro contains the Atmel® Embedded Debugger (EDBG) for on-board debugging. The
EDBG is a composite USB device of 3 interfaces; a debugger, Virtual COM Port and Data Gateway Interface
(DGI).
In conjunction with Atmel Studio, the EDBG debugger interface can program and debug the ATSAM4LC4C. On
the SAM4L Xplained Pro, the SWD interface is connected between the EDBG and the ATSAM4LC4C.
The Virtual COM Port is connected to a UART port on the ATSAM4LC4C (see section “Embedded Debugger
implementation” on page 15 for pinout), and provides an easy way to communicate with the target
application through a simple terminal software. It offers variable baud rate, parity and stop bit settings. Note
that the settings on the target device UART must match the settings given in the terminal software.
The DGI consists of several physical data interfaces for communication with the host computer. Please,
see section “Embedded Debugger implementation” on page 15 for available interfaces and pinout.
Communication over the interfaces are bidirectional. It can be used to send events and values from the
ATSAM4LC4C, or as a generic printf-style data channel. Traffic over the interfaces can be timestamped on the
EDBG for more accurate tracing of events. Note that timestamping imposes an overhead that reduces maximal
throughput. The DGI uses a proprietary protocol, and is thus only compatible with Atmel Studio.
The EDBG controls two LEDs on SAM4L Xplained Pro, a power LED and a status LED. Table 3-1, “EDBG LED
control” shows how the LEDs are controlled in different operation modes.
Table 3-1. EDBG LED control
Operation mode Power LED Status LED
Normal operation Power LED is lit when power is
applied to the board.
Bootloader mode (idle) The power LED and the status LED blinks simultaneously.
Bootloader mode (firmware
upgrade)
For further documentation on the EDBG, see the EDBG User Guide.
3.2 Hardware Identification System
All Xplained Pro compatible extension boards have an Atmel ATSHA204 crypto authentication chip mounted.
This chip contains information that identifies the extension with its name and some extra data. When an
Xplained Pro extension board is connected to an Xplained Pro MCU board the information is read and sent
to Atmel Studio. The Atmel Kits extension, installed with Atmel Studio, will give relevant information, code
examples and links to relevant documents. Table 3-2, “Xplained Pro ID chip content” shows the data fields
stored in the ID chip with example content.
Table 3-2. Xplained Pro ID chip content
Data Field Data Type Example Content
Manufacturer ASCII string Atmel’\0’
Product Name ASCII string Segment LCD1 Xplained Pro’\0’
Product Revision ASCII string 02’\0’
Product Serial Number ASCII string 1774020200000010’\0’
Activity indicator, LED flashes
every time something happens on
the EDBG.
The power LED and the status LED blinks in an alternating pattern.
1
http://store.atmel.com/CBC.aspx?q=c:100113
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Data Field Data Type Example Content
Minimum Voltage [mV] uint16_t 3000
Maximum Voltage [mV] uint16_t 3600
Maximum Current [mA] uint16_t 30
3.3 Power supply
The SAM4L Xplained Pro kit can be powered either by USB or by an external power source through the 4pin power header, marked PWR. This connector is described in “Power header” on page 10. The available
power sources and specifications are listed in Table 3-3, “Power sources for SAM4L Xplained Pro”.
Table 3-3. Power sources for SAM4L Xplained Pro
Power input Voltage requirements Current requirements Connector marking
External power 5V +/- 2 % (+/- 100mV)
for USB host operation.
4.3 V to 5.5 V if USB
host operation is not
required
Embedded debugger
USB
4.4V to 5.25V
(according to USB spec)
Target USB 4.4V to 5.25V
(according to USB spec)
Recommended
minimum is 1A to
be able to provide
enough current for
connected USB
devices and the board
itself. Recommended
maximum is 2A due
to the input protection
maximum current
specification.
500 mA (according to
USB spec)
500 mA (according to
USB spec)
PWR
DEBUG USB
TARGET USB
The kit will automatically detect which power sources are available and choose which one to use according to
the following priority:
1. External power
2. Embedded debugger USB
3. Target USB
Note
External power is required when the 500mA through the USB connector is not enough to power a
connected USB device in a USB host application.
3.3.1 Measuring SAM4L power consumption
As part of an evaluation of the SAM4L it can be of interest to measure its power consumption. Because the
device has a separate power plane (VCC_MCU_P3V3) on this board it is possible to measure the current
consumption by measuring the current that is flowing into this plane. The VCC_MCU_P3V3 plane is connected
via a jumper to the main power plane (VCC_TARGET_P3V3) and by replacing the jumper with an ampere
meter it is possible to determine the current consumption. To locate the current measurement header, please
refer to Figure 1-1, “SAM4L Xplained Pro evaluation kit overview.”.
Warning
Do not power the board without having the jumper or an ampere meter mounted. This can cause
the SAM4L to be powered through its I/O pins and cause undefined operation of the device.
3.4 Standard Headers and Connectors
3.4.1 Xplained Pro extension header
All Xplained Pro kits have one or more dual row, 20 pin, 100mil extension headers. Xplained Pro MCU boards
have male headers while Xplained Pro extensions have their female counterparts. Note that all pins are
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not always connected. However, all the connected pins follow the defined pin-out described in Table 3-4,
“Xplained Pro extension header”. The extension headers can be used to connect a wide variety of Xplained Pro
extensions to Xplained Pro MCU boards and to access the pins of the target MCU on Xplained Pro MCU board
directly.
Table 3-4. Xplained Pro extension header
Pin number Name Description
1 ID Communication line to the ID chip on extension board.
2 GND Ground
3 ADC(+) Analog to digital converter , alternatively positive part of differential
ADC
4 ADC(-) Analog to digital converter , alternatively negative part of
differential ADC
5 GPIO1 General purpose IO
6 GPIO2 General purpose IO
7 PWM(+) Pulse width modulation , alternatively positive part of differential
PWM
8 PWM(-) Pulse width modulation , alternatively positive part of differential
PWM
9 IRQ/GPIO Interrupt request line and/or general purpose IO.
10 SPI_SS_B/GPIO Slave select for SPI and/or general purpose IO.
11 TWI_SDA Data line for two wire interface. Always implemented, bus type.
12 TWI_SCL Clock line for two wire interface. Always implemented, bus type.
13 USART_RX Receiver line of Universal Synchronous and Asynchronous serial
Receiver and Transmitter
14 USART_TX Transmitter line of Universal Synchronous and Asynchronous
serial Receiver and Transmitter
15 SPI_SS_A Slave select for SPI. Should be unique if possible.
16 SPI_MOSI Master out slave in line of Serial peripheral interface. Always
implemented, bus type
17 SPI_MISO Master in slave out line of Serial peripheral interface. Always
implemented, bus type
18 SPI_SCK Clock for Serial peripheral interface. Always implemented, bus
type
19 GND Ground
20 VCC Power for extension board
3.4.2 Xplained Pro segment LCD extension connector
Xplained Pro MCU boards that have a microcontroller that supports segment LCDs contain a 51-pin segment
LCD extension connector. This connector is implemented with HIROSEs DF-9 series. Xplained Pro MCU
boards use the male version DF9-51P-1V(69) and Xplained Pro extension boards use the female counterpart
DF9-51S-1V(69). This header has a standardized pin-out as shown in Table 3-5, “Xplained Pro segment LCD
extension connector definition”.
Note
All pins are not connected on all Xplained Pro MCU boards. How many pins that are used depend
on how many segments and common terminals the target MCU supports.
Table 3-5. Xplained Pro segment LCD extension connector definition
Description Function Pin Pin Function Description
Common terminal 3 COM3 1 2 COM2 Common terminal 2
Common terminal 1 COM1 3 4 COM0 Common terminal 0
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Description Function Pin Pin Function Description
Segment 0 SEG0 5 6 SEG1 Segment 1
Segment 2 SEG2 7 8 SEG3 Segment 3
Segment 4 SEG4 9 10 SEG5 Segment 5
Segment 6 SEG6 11 12 SEG7 Segment 7
Segment 8 SEG8 13 14 SEG9 Segment 9
Segment 10 SEG10 15 16 SEG11 Segment 11
Segment 12 SEG12 17 18 SEG13 Segment 13
Segment 14 SEG14 19 20 SEG15 Segment 15
Segment 16 SEG16 21 22 SEG17 Segment 17
Segment 18 SEG18 23 24 SEG19 Segment 19
Segment 20 SEG20 25 26 SEG21 Segment 21
Segment 22 SEG22 27 28 SEG23 Segment 23
Segment 24 SEG24 29 30 SEG25 Segment 25
Segment 26 SEG26 31 32 SEG27 Segment 27
Segment 28 SEG28 33 34 SEG29 Segment 29
Segment 30 SEG30 35 36 SEG31 Segment 31
Segment 32 SEG32 37 38 SEG33 Segment 33
Segment 34 SEG34 39 40 SEG35 Segment 35
Segment 36 SEG36 41 42 SEG37 Segment 37
Segment 38 SEG38 43 44 SEG39 Segment 39
Not Connected NC 45 46 NC Not Connected
Backlight Anode Backlight V+ 47 48 Backlight V- Backlight Cathode
Backlight Control Backlight
49 50 ID Xplained Pro ID line
CTRL
Ground GND 51
3.4.3 Power header
The power header can be used to connect external power to the SAM4L Xplained Pro kit. The kit will
automatically detect and switch to the external power if supplied. The power header can also be used as supply
for external peripherals or extension boards. Care must be taken not to exceed the total current limitation of the
on-board regulator for the 3.3V regulated output. To locate the current measurement header, please refer to
Figure 1-1, “SAM4L Xplained Pro evaluation kit overview.”
Table 3-6. Power header PWR
Pin number PWR header Pin name Description
1 VEXT_P5V0 External 5V input
2 GND Ground
3 VCC_P5V0 Unregulated 5V (output, derived
4 VCC_P3V3 Regulated 3.3V (output, used as
Note
If the board is powered from a battery source it is recommended to use the PWR header. If there
is a power source connected to EDBG USB, the EDBG is activated and it will consume more
power.
from one of the input sources)
main power for the kit)
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4. Hardware user guide
4.1 Connectors
This chapter describes the implementation of the relevant connectors and headers on SAM4L Xplained Pro
and their connection to the ATSAM4LC4C. The tables of connections in this chapter also describes which
signals are shared between the headers and on-board functionality.
4.1.1 I/O extension headers
The SAM4L Xplained Pro headers EXT1, EXT2, EXT3 and EXT4 offers access to the I/O of the microcontroller
in order to expand the board e.g. by connecting extensions to the board. These headers all comply with the
standard extension header specified in Xplained Pro Standard Extension Header. All headers have a pitch of
2.54 mm.
Table 4-1. Extension header EXT1.
Pin on EXT1 SAM4L pin Function Shared functionality
1 - - Communication line to ID chip on
extension board.
2 - - GND
3 PA04 ADCIFE/AD[0]
4 PA05 ADCIFE/AD[1]
5 PB12 GPIO LCD connector (EXT5)
6 PC02 GPIO
7 PC00 TC/1/A0
8 PC01 TC/1/B0
9 PC25 EIC/EXTINT[2] LCD connector (EXT5)
10 PB13 SPI/NPCS[1] LCD connector (EXT5)
11 PA23 TWIMS/0/TWD LCD connector (EXT5)
12 PA24 TWIMS/0/TWCK LCD connector (EXT5)
13 PB00 USART/0/RXD EXT4
14 PB01 USART/0/TXD EXT4
15 PC03 SPI/NPCS[0]
16 PA22 SPI/MOSI EXT2 and LCD connector (EXT5)
17 PA21 SPI/MISO EXT2 and LCD connector (EXT5)
18 PC30 SPI/SCK EXT2 and LCD connector (EXT5)
19 - - GND
20 - - VCC
Table 4-2. Extension header EXT2.
Pin on EXT2 SAM4L pin Function Shared functionality
1 - - Communication line to ID chip on
extension board.
2 - - GND
3 PA07 ADCIFE/AD[2]
4 PB02 ADCIFE/AD[3]
5 PC08 GPIO
6 PB10 GPIO LCD connector (EXT5)
7 PC04 TC/1/A2
8 PC05 TC/1/B2 LCD connector (EXT5)
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Pin on EXT2 SAM4L pin Function Shared functionality
9 PC06 EIC/EXTINT[8]
10 PC09 GPIO
11 PB14 TWIMS/3/TWD EXT3, EXT4 and LCD connector (EXT5)
12 PB15 TWIMS/3/TWCK EXT3, EXT4 and LCD connector (EXT5)
13 PC26 USART/1/RXD EXT3 and LCD connector (EXT5)
14 PC27 USART/1/TXD EXT3 and LCD connector (EXT5)
15 PB11 SPI/NPCS[2] LCD connector (EXT5)
16 PA22 SPI/MOSI EXT1 and LCD connector (EXT5)
17 PA21 SPI/MISO EXT1 and LCD connector (EXT5)
18 PC30 SPI/SCK EXT1 and LCD connector (EXT5)
19 - - GND
20 - - VCC
Table 4-3. Extension header EXT3.
Pin on EXT3 SAM4L pin Function Shared functionality
1 - - Communication line to ID chip on
extension board.
2 - - GND
3 PB03 ADCIFE/AD[4]
4 PB04 ADCIFE/AD[5]
5 PC15 GPIO LCD connector (EXT5)
6 PC16 GPIO LCD connector (EXT5)
7 PA08 TC/0/A0 LCD connector (EXT5)
8 PA09 TC/0/B0 LCD connector (EXT5)
9 PA06 EIC/EXTINT[1]
10 PA10 GPIO LCD connector (EXT5)
11 PB14 TWIMS/3/TWD EXT2, EXT4 and LCD connector (EXT5)
12 PB15 TWIMS/3/TWCK EXT2, EXT4 and LCD connector (EXT5)
13 PC26 USART/1/RXD EXT2 and LCD connector (EXT5)
14 PC27 USART/1/TXD EXT2 and LCD connector (EXT5)
15 PA17 GPIO LCD connector (EXT5)
16 PA20 UART/2/TXD EXT4 and LCD connector (EXT5)
17 PA19 UART/2/RXD EXT4 and LCD connector (EXT5)
18 PA18 UART/2/CLK EXT4 and LCD connector (EXT5)
19 - - GND
20 - - VCC
Table 4-4. Extension header EXT4.
Pin on EXT4 SAM4L pin Function Shared functionality
1 - - Communication line to ID chip on
extension board.
2 - - GND
3 PB05 ADCIFE/AD[6]
4 PC10 ADCIFE/AD[7] USB_ID
5 PC17 GPIO LCD connector (EXT5)
6 PC18 GPIO LCD connector (EXT5)
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Pin on EXT4 SAM4L pin Function Shared functionality
7 PA12 TC/0/A2 LCD connector (EXT5)
8 PA13 TC/0/B2 LCD connector (EXT5)
9 PA16 GPIO LCD connector (EXT5)
10 PA15 GPIO LCD connector (EXT5)
11 PB14 TWIMS/3/TWD EXT2, EXT3 and LCD connector (EXT5)
12 PB15 TWIMS/3/TWCK EXT2, EXT3 and LCD connector (EXT5)
13 PB00 USART/0/RXD EXT1
14 PB01 USART/0/TXD EXT1
15 PA11 GPIO LCD connector (EXT5)
16 PA20 UART/2/TXD EXT3 and LCD connector (EXT5)
17 PA19 UART/2/RXD EXT3 and LCD connector (EXT5)
18 PA18 UART/2/CLK EXT3 and LCD connector (EXT5)
19 - - GND
20 - - VCC
4.1.2 Segment LCD extension connector
Extension connector EXT5 is a special connector for segment LCD displays. SAM4L Xplained Pro implements
one segment LCD extension connector for Xplained Pro extensions.
Table 4-5. Segment LCD display connector EXT5 .
Pin on EXT5 SAM4L pin Function Shared functionality
1 PA09 COM3 EXT3
2 PA10 COM2 EXT3
3 PA11 COM1 EXT4
4 PA12 COM0 EXT4
5 PC15 SEG0 EXT3
6 PC16 SEG1 EXT3
7 PC17 SEG2 EXT4
8 PC18 SEG3 EXT4
9 PC19 SEG4
10 PA13 SEG5 EXT4
11 PA14 SEG6
12 PA15 SEG7 EXT4
13 PA16 SEG8 EXT4
14 PA17 SEG9 EXT3
15 PC20 SEG10
16 PC21 SEG11
17 PC22 SEG12
18 PC23 SEG13
19 PB08 SEG14
20 PB09 SEG15
21 PB10 SEG16 EXT2
22 PB11 SEG17 EXT2
23 PA18 SEG18 EXT3 and EXT4
24 PA19 SEG19 EXT3 and EXT4
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Pin on EXT5 SAM4L pin Function Shared functionality
25 PA20 SEG20 EXT3 and EXT4
26 PB07 SEG21
27 PB06 SEG22
28 PA08 SEG23 EXT3
29 PC24 SEG24
30 PC25 SEG25 EXT1
31 PC26 SEG26 EXT2 and EXT3
32 PC27 SEG27 EXT2 and EXT3
33 PC28 SEG28
34 PC29 SEG29
35 PC30 SEG30 EXT1 and EXT2
36 PC31 SEG31
37 PB12 SEG32 EXT1
38 PB13 SEG33 EXT1
39 PA21 SEG34 EXT1 and EXT2
40 PA22 SEG35 EXT1 and EXT2
41 PB14 SEG36 EXT2, EXT3 and EXT4
42 PB15 SEG37 EXT2, EXT3 and EXT4
43 PA23 SEG38 EXT1
44 PA24 SEG39 EXT1
45 - Not Connected
46 - Not Connected
47 - VCC_P3V3
48 - GND
49 PC05 Backlight EXT2
50 - ID
51 - GND
4.2 Peripherals
4.2.1 QTouch button
The SAM4L Xplained Pro kit has one QTouch button and the connection to the SAM4L is shown in the table
below. The QTouch sensor, a copper fill, is located on the second layer (GND) of the board. The sensor is
shielded by the third and the bottome layer (VCC and signal layer respectively) and therefore the sensor is not
affected by any touches from the back side of the board.
Table 4-6. QTouch button connections.
Pin on SAM4L Function
PC13 CATB_SENSE15
PC14 CATB_DIS
4.2.2 Crystals
The SAM4L Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4L device.
Each crystal has a cut-strap next to it that can be used to measure the oscillator safety factor. This is done by
cutting the strap and adding a resistor across the strap. More information about oscillator allowance and safety
factor can be found in appnote AVR41001.
1
http://www.atmel.com/images/doc8333.pdf
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Table 4-7. External 32.768kHz crystals.
Pin on SAM4L Function
XIN32 XIN32
XOUT32 XOUT32
Table 4-8. External 12MHz crystals.
Pin on SAM4L Function
PA00 XIN0
PA01 XOUT0
4.2.3 Mechanical buttons
The SAM4L Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the
SAM4L reset line and the other is a generic user configurable button. When a button is pressed it will drive the
I/O line to GND.
Table 4-9. Mechanical buttons.
Pin on SAM4L Silkscreen text
RESET_N RESET
PC24 SW0
4.2.4 LED
There is one yellow LED available on the SAM4L Xplained Pro board that can be turned on and off. The LED
can be activated by driving the connected I/O line to GND.
Table 4-10. LED connections.
Pin on SAM4L LED
PC07 Yellow LED0
4.3 Embedded Debugger implementation
The SAM4L Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and debug
the ATSAM4LC4C using Serial Wire Debug (SWD). The Embedded debugger also include a Virtual Com port
interface over UART, an Atmel Data Gateway Interface over synchronous UART and TWI and it monitors four
of the SAM4L GPIOs. Atmel Studio can be used as a front end for the Embedded Debugger.
4.3.1 Serial Wire Debug
The Serial Wire Debug (SWD) use two pins to communicate with the target. For further information on how to
use the programming and debugging capabilities of the EDBG, see “Embedded Debugger” on page 7.
Table 4-11. SWD connections.
Pin on SAM4L Function
TCK SWD clock
PA03 SWD data
PA23 SWD trace data
4.3.2 Virtual COM port
The Embedded Debugger act as a Virtual Com Port gateway by using one of the ATSAM4LC4C UARTs. For
further information on how to use the Virtual COM port see “Embedded Debugger” on page 7.
Table 4-12. Virtual COM port connections.
Pin on SAM4L Function
PC27 UART TXD (SAM4L TX line)
PC26 UART RXD (SAM4L RX line)
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4.3.3 Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a synchronous
USART or TWI port. The DGI can be used to send a variety of data from the SAM4L to the host PC. For further
information on how to use the DGI interface see “Embedded Debugger” on page 7.
Table 4-13. DGI interface connections when using USART.
Pin on SAM4L Function
PC29 USART TXD (SAM4L TX line)
PC28 USART RXD (SAM4L RX line)
PC31 USART CLK
Table 4-14. DGI interface connections when using TWI.
Pin on SAM4L Function
PA23 SDA (Data line)
PA24 SCL (Clock line)
Four GPIO lines are connected to the Embedded Debugger. The EDBG can monitor these lines and time
stamp pin value changes. This makes it possible to accurately time stamp events in the SAM4L application
code. For further information on how to configure and use the GPIO monitoring features see “Embedded
Debugger” on page 7.
Table 4-15. GPIO lines connected to the EDBG.
Pin on SAM4L Function
PB05 GPIO
PB06 GPIO
PB07 GPIO
PB10 GPIO
4.4 Jumper description
The SAM4L Xplained Pro contains five jumpers that can be used to adjust the functionality of the board. You
can locate the jumpers in figure Figure 1-1, “SAM4L Xplained Pro evaluation kit overview.”.Here is a description
of the jumpers.
4.4.1 LDO/BUCK Jumper
This jumper selelcts the power mode of the internal voltage regulator in the target MCU. It can be either LDO
mode, which is a linear regulator or BUCK mode, which is a switch mode regulator. If LDO mode is selected,
the LDO jumper should be mounted as well.
4.4.2 LDO Jumper
This jumper should be mounted when the power mode jumper is set to LDO mode. It will bypass the BUCK
mode inductor and increase efficiency for this mode. If the poewr mode jumper is set to BUCK mode, this
jumper needs to be removed to make it work.
4.4.3 VLCD_A and VLCD_BC Jumpers
When the Segment LCD is not used, these jumpers needs to be mounted to power the pins used for segment
LCD in GPIO mode.
4.4.4 VCC_MCU Jumper
This jumper connects VCC to the target MCU. This jumper can be replaced with an ampere meter to measure
the current used by the target device. Remeber to mount this jumper or an ampere meter to make the target
MCU work properly.
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5. Hardware revision history and known issues
5.1 Identifying product ID and revision
The revision and product identifier of Xplained Pro boards can be found in two ways, through Atmel Studio or
by looking at the sticker on the bottom side of the PCB.
By connecting a Xplained Pro MCU board to a computer with Atmel Studio running, an information window will
pop up. The first 6 digits of the serial number, which is listed under kit details, contain the product identifier and
revision. Information about connected Xplained Pro extension boards will also appear in the Atmel Kits window.
The same information can be found on the sticker on the bottom side of the PCB. Most kits will print the
identifier and revision in plain text as A09-nnnn\rr where nnnn is the identifier and rr is the revision. Boards with
limited space have a sticker with only a QR-code which contains a serial number string.
The serial number string has the following format:
"nnnnrrssssssssss"
n = product identifier
r = revision
s = serial number
The kit identifier for SAM4L Xplained Pro is 1783.
5.2 Revision 2
Revision 2 of SAM4L Xplained Pro is the initial released version, there are no known issues.
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6. Document revision history
Doc. Rev. Date Comment
B 22/05/2013 Corrected SW0 pin to PC24 from PA24
A 26/02/2013 First release
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7. Evaluation board/kit important notice
This evaluation board/kit is intended for use for FURTHER ENGINEERING, DEVELOPMENT,
DEMONSTRATION, OR EVALUATION PURPOSES ONLY. It is not a finished product and may not (yet)
comply with some or any technical or legal requirements that are applicable to finished products, including,
without limitation, directives regarding electromagnetic compatibility, recycling (WEEE), FCC, CE or UL
(except as may be otherwise noted on the board/kit). Atmel supplied this board/kit "AS IS," without any
warranties, with all faults, at the buyer's and further users' sole risk. The user assumes all responsibility
and liability for proper and safe handling of the goods. Further, the user indemnifies Atmel from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user's
responsibility to take any and all appropriate precautions with regard to electrostatic discharge and any other
technical or legal concerns.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER USER NOR
ATMEL SHALL BE LIABLE TO EACH OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES.
No license is granted under any patent right or other intellectual property right of Atmel covering or relating
to any machine, process, or combination in which such Atmel products or services might be or are used.
Mailing Address: Atmel Corporation
1600 Technology Drive
San Jose, CA 95110
USA
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Atmel Corporation 1600 Technology Drive, San Jose, CA 95110 USA T: (+1)(408) 441.0311 F: (+1)(408) 436.4200 | www.atmel.com
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