Atmel SAM4N Xplained Pro (USER GUIDE)
USER GUIDE
Atmel SAM4N Xplained Pro
Preface
The Atmel® SAM4N Xplained Pro evaluation kit is a hardware platform to evaluate the ATSAM4N16C microcontroller.
Supported by the Atmel Studio integrated development platform, the kit provides easy access to the features of the Atmel ATSAM4N16C and explains how to integrate the device in a custom 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
ATSAM4N16C.
The Xplained Pro extension kits offers additional peripherals to extend the features of the board and ease the development of custom 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 ......................................................................... 5
2.1.
Quick-start ........................................................................... 5
2.2.
Connecting the kit ................................................................. 5
2.3.
Design documentation and related links ..................................... 5
3. Xplained Pro ............................................................................ 6
3.1.
Embedded Debugger ............................................................. 6
3.2.
Hardware identification system ................................................. 6
3.3.
Power supply ....................................................................... 7
3.3.1.
Measuring SAM4N power consumption ......................... 7
3.4.
Standard headers and connectors ............................................ 7
3.4.1.
Xplained Pro extension header .................................... 7
3.4.2.
Xplained Pro power header ......................................... 8
4. Hardware user guide .............................................................. 9
4.1.
Connectors .......................................................................... 9
4.1.1.
I/O extension headers ................................................ 9
4.1.2.
Other headers ........................................................ 10
4.2.
Peripherals ......................................................................... 11
4.2.1.
Crystals ................................................................. 11
4.2.2.
Mechanical buttons .................................................. 12
4.2.3.
LED ...................................................................... 12
4.2.4.
Analog reference ..................................................... 12
4.3.
Embedded Debugger implementation ...................................... 12
4.3.1.
Serial Wire Debug ................................................... 12
4.3.2.
Virtual COM port ..................................................... 12
4.3.3.
Atmel Data Gateway Interface ................................... 13
5. Hardware revision history and known issues ........................ 14
5.1.
Identifying product ID and revision .......................................... 14
5.2.
Revision 2 .......................................................................... 14
6. Document revision history ..................................................... 15
7. Evaluation board/kit important notice .................................... 16
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1.
1.1
Introduction
Features
● Atmel ATSAM4N16C 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 USART or TWI
● Four GPIOs connected to target for code instrumentation
● Digital I/O
● Two mechanical buttons (user and reset button)
● One user LED
● Three extension headers
● Three spare signal headers
● Two possible power sources
● External power
● Embedded debugger USB
● 12MHz crystal
● 32kHz crystal
1.2
Kit overview
The Atmel SAM4N Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel ATSAM4N16C.
The kit offers a set of features that enables the ATSAM4N16C user to get started using the ATSAM4N16C peripherals right away and to get an understanding of how to integrate the device in their own design.
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Figure 1-1. SAM4N Xplained Pro evaluation kit overview
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2.
2.1
2.2
2.3
Getting started
Quick-start
3 Steps to start exploring the Atmel Xplained Pro Platform
● Download and install
Atmel Studio
1
.
● Launch Atmel Studio.
● Connect an USB cable to the DEBUG USB port.
Connecting the kit
When connecting Atmel SAM4N 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 guide
2 regarding how to compile and program the kit.
for information
Design documentation and related links
The following list contains links to the most relevant documents and software for SAM4N 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.
SAM4N Xplained Pro User Guide
4
- PDF version of this User Guide.
3.
SAM4N Xplained Pro Design Documentation
5 drawings, 3D plots, layer plots etc.
- Package containing schematics, BOM, assembly
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-42104-SAM4N-Xplained-Pro_User-Guide.pdf
5
http://www.atmel.com/Images/Atmel-42104-SAM4N-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.
3.1
3.2
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 Store
1
.
Embedded Debugger
The SAM4N 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 ATSAM4N16C. On the SAM4N Xplained Pro, the SWD interface is connected between the EDBG and the ATSAM4N16C.
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 12
for available interfaces and pinout.
Communication over the interfaces are bidirectional. It can be used to send events and values from the
ATSAM4N16C, 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 SAM4N Xplained Pro, a power LED and a status LED.
shows how the LEDs are controlled in different operation modes.
Table 3-1. EDBG LED control
Operation mode
Normal operation
Power LED
Power LED is lit when power is applied to the board.
Bootloader mode (idle)
Bootloader mode (firmware upgrade)
For further documentation on the EDBG, see the EDBG User Guide
2
.
Status LED
Activity indicator, LED flashes every time something happens on the EDBG.
The power LED and the status LED blinks simultaneously.
The power LED and the status LED blinks in an alternating pattern.
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
Manufacturer ASCII string
Product Name
Product Revision
Product Serial Number
ASCII string
ASCII string
ASCII string
Example Content
Atmel’\0’
Segment LCD1 Xplained Pro’\0’
02’\0’
1774020200000010’\0’
1
http://store.atmel.com/CBC.aspx?q=c:100113
2
http://www.atmel.com/Images/Atmel-42096-Microcontrollers-Embedded-Debugger_User-Guide.pdf
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3.3
3.3.1
Data Field
Minimum Voltage [mV]
Maximum Voltage [mV]
Maximum Current [mA]
Data Type
uint16_t uint16_t uint16_t
Example Content
3000
3600
30
Power supply
The SAM4N Xplained Pro kit can be powered either by USB or by an external power source through the 4-pin power header, marked PWR. This connector is described in
“Xplained Pro power header” on page 8
. The
.
Table 3-3. Power sources for SAM4N Xplained Pro
Power input Voltage requirements
External power 4.3V to 5.5V
Connector marking
PWR
Embedded debugger
USB
4.4V to 5.25V
(according to USB spec)
Current requirements
Recommended minimum is 500mA to be able to provide enough current for extentions and the board itself.
Recommended maximum is 2A due to the input protection maximum current specification.
500 mA (according to
USB spec)
DEBUG 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
Measuring SAM4N power consumption
As part of an evaluation of the SAM4N 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, “SAM4N Xplained Pro evaluation kit overview” .
Warning
3.4
3.4.1
Do not power the board without having the jumper or an ampere meter mounted. This can cause the SAM4N to be powered through its I/O pins and cause undefined operation of the device.
Standard headers and connectors
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
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
1 ID
Description
Communication line to the ID chip on extension board.
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3.4.2
Pin number Name
2 GND
3 ADC(+)
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ADC(-)
GPIO1
GPIO2
PWM(+)
PWM(-)
IRQ/GPIO
SPI_SS_B/GPIO
TWI_SDA
TWI_SCL
USART_RX
USART_TX
SPI_SS_A
SPI_MOSI
SPI_MISO
SPI_SCK
GND
VCC
Description
Ground
Analog to digital converter , alternatively positive part of differential ADC
Analog to digital converter , alternatively negative part of differential ADC
General purpose IO
General purpose IO
Pulse width modulation , alternatively positive part of differential PWM
Pulse width modulation , alternatively positive part of differential PWM
Interrupt request line and/or general purpose IO.
Slave select for SPI and/or general purpose IO.
Data line for two wire interface. Always implemented, bus type.
Clock line for two wire interface. Always implemented, bus type.
Receiver line of Universal Synchronous and Asynchronous serial Receiver and Transmitter
Transmitter line of Universal Synchronous and
Asynchronous serial Receiver and Transmitter
Slave select for SPI. Should be unique if possible.
Master out slave in line of Serial peripheral interface. Always implemented, bus type
Master in slave out line of Serial peripheral interface. Always implemented, bus type
Clock for Serial peripheral interface. Always implemented, bus type
Ground
Power for extension board
Xplained Pro power header
The power header can be used to connect external power to the SAM4N 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, “SAM4N Xplained Pro evaluation kit overview”
Table 3-5. Power header PWR
Pin number PWR header
1
2
3
4
Pin name
VEXT_P5V0
GND
VCC_P5V0
VCC_P3V3
Description
External 5V input
Ground
Unregulated 5V (output, derived from one of the input sources)
Regulated 3.3V (output, used as main power for the kit)
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.
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4.
4.1
4.1.1
Hardware user guide
Connectors
This chapter describes the implementation of the relevant connectors and headers on SAM4N Xplained Pro and their connection to the ATSAM4N16C. The tables of connections in this chapter also describes which signals are shared between the headers and on-board functionality.
4
5
6
2
3
7
8
9
13
14
15
16
17
18
19
20
8
9
6
7
10
11
12
2
3
4
5
I/O extension headers
The SAM4N Xplained Pro headers EXT1, EXT2 and EXT3 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
2.54 mm.
Table 4-1. Extension header EXT1
Pin on EXT1
1 -
SAM4N pin
-
Function
PA21
PA22
PA11
PA13
-
PA12
-
PA14
-
PA17
PA18
PA24
PA25
PC23
PC24
PA0
PA23
PA3
PA4
-
AD0
AD1
GPIO
GPIO
TIOA3
TIOB3
WKUP0
GPIO
TWD0
TWCK0
RXD1
TXD1
NPCS0
SPI_MOSI
-
SPI_MISO
-
SPI_SCK
Shared functionality
Communication line to ID chip on extension board.
GND
SPARE HEADER2
SPARE HEADER2
SPARE HEADER2
EXT3
EXT3, SPARE HEADER1
EXT2, EXT3
EXT2, EXT3
EXT2, EXT3
GND
VCC
Table 4-2. Extension header EXT2
Pin on EXT2
1 -
SAM4N pin
-
Function
-
PA19
PA20
PC0
PC1
PC26
PC27
PA1
-
AD2
AD3
GPIO
GPIO
TIOA4
TIOB4
WKUP1
Shared functionality
Communication line to ID chip on extension board.
GND
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4.1.2
16
17
18
19
20
13
14
15
Pin on EXT2
10
11
12
Table 4-3. Extension header EXT3
Pin on EXT3
1 -
SAM4N pin
-
PA13
PA12
-
PA14
SAM4N pin
PC8
PB0
PB1
PA5
PA6
PC4
Function
GPIO
TWD2
TWCK2
RXD0
TXD0
NPCS1
-
SPI_MOSI
SPI_MISO
-
SPI_SCK
Shared functionality
EDBG
EDBG
EXT1, EXT3
EXT1, EXT3
EXT1, EXT3
GND
VCC
8
9
10
11
12
13
14
4
5
6
7
2
3
15
16
17
18
19
20
-
PC29
PC30
PC2
PC3
PA26
PA27
PB2
PB3
PA3
PA4
PB10
PB11
-
-
PC7
PA13
PA12
PA14
-
Function
-
AD13
AD14
GPIO
GPIO
TIOA2
TIOB2
WKUP12
GPIO
TWD0
TWCK0
URXD3
UTXD3
-
-
NPCS2
SPI_MOSI
SPI_MISO
SPI_SCK
Shared functionality
Communication line to ID chip on extension board.
GND
EXT1
EXT1, SPARE HEADER1
EXT1, EXT2
EXT1, EXT2
EXT1, EXT2
GND
VCC
Other headers
In addition to the
“I/O extension headers” on page 9 , SAM4N Xplained Pro has two additional headers
with spare signals that offers access to the I/O of the microcontroller which are otherwise not easily available elsewhere or might be favourable to have collected toghether. All headers have a pitch of 2.54mm.
Table 4-4. SPARE SIGNALS header 1
Pin on header
1
SAM4N pin
PA4
2
3
PA28
PA29
Function
TWCK0
TCLK1
TCLK2
Shared functionality
EXT1, EXT3
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4.2
4.2.1
10
11
12
7
8
9
5
6
Pin on header
4
SAM4N pin
PC25
PC28
PC31
PC16
PC17
PA31
-
-
PB4
10
11
12
6
7
8
9
4
5
2
3
Table 4-5. SPARE SIGNALS header 2
Pin on header
1
SAM4N pin
PA15
PA16
PC5
PC6
PC11
-
-
PC22
PC23
PC24
PA25
PC12
4
5
2
3
6
Table 4-6. SPARE SIGNALS header 3
Pin on header
1
SAM4N pin
PC13
-
-
PC15
PA2
PB13
Function
UTXD2
URXD2
GPIO
GPIO
GPIO
GPIO
TIOA3
TIOB3
GPIO
-
-
AD12
Function
TCLK3
TCLK4
TCLK5
PCK0
PCK1
PCK2
-
-
PWM2
Function
AD10
AD11
DATRG
-
-
DAC0
Shared functionality
VCC
GND
Shared functionality
EXT1
EXT1
EXT1
VCC
GND
Shared functionality
VCC
GND
Peripherals
Crystals
The SAM4N Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4N 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 AVR4100 documentation
2
of the board.
1
. Calculations for the selected crystal can be found in the schematics
Table 4-7. External 32.768kHz crystals
Pin on SAM4N
PA7
Function
XIN32
1
http://www.atmel.com/images/doc8333.pdf
2
http://www.atmel.com/Images/Atmel-42104-SAM4N-Xplained-Pro_User-Guide.zip
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4.2.2
4.2.3
4.2.4
Note
4.3
4.3.1
4.3.2
Pin on SAM4N
PA8
Table 4-8. External 12MHz crystals
Pin on SAM4N
PB9
PB8
Function
XOUT32
Function
XIN
XOUT
Mechanical buttons
SAM4N Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the
SAM4N 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 SAM4N
NRST
PA30
Silkscreen text
RESET
SW0
LED
There is one yellow LED available on the SAM4N 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 SAM4N
PB14
LED
Yellow LED0
Analog reference
The ADVREF is available on a 2-pin header to measure the analog reference voltage of the SAM4N device.
The ADREF pin can only be used for measuring and must not be used as an input for an external voltage reference.
Embedded Debugger implementation
SAM4N Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and debug the
ATSAM4N16C using Serial Wire Debug (SWD). The Embedded Debugger also include a Virtual Com port interface over UART, an Atmel Data Gateway Interface over SPI and TWI and it monitors four of the SAM4N
GPIOs. Atmel Studio can be used as a front end for the Embedded Debugger.
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 6 .
Table 4-11. SWD connections
Pin on SAM4N
PB7
PB6
PB5
PB12
Function
SWD clock
SWD data
SWD trace output
Erase
Virtual COM port
The Embedded Debugger act as a Virtual Com Port gateway by using one of the ATSAM4N16C UARTs. For
further information on how to use the Virtual COM port see “Embedded Debugger” on page 6
.
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4.3.3
Table 4-12. Virtual COM port connections
Pin on SAM4N
PA10
PA9
Function
UART TXD (SAM4N TX line)
UART RXD (SAM4N RX line)
Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a USART or TWI port. The DGI can be used to send a variety of data from the SAM4N to the host PC. For further information on how to use the DGI interface see
.
Table 4-13. DGI interface connections when using USART
Pin on SAM4N
PC10
Function
USART TXD (SAM4N TX line)
PC9
PC14
USART RXD (SAM4N RX line)
USART CLK
Table 4-14. DGI interface connections when using TWI
Pin on SAM4N
PB0
PB1
Function
SDA (Data line)
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 SAM4N application
code. For further information on how to configure and use the GPIO monitoring features see “Embedded
.
Table 4-15. GPIO lines connected to the EDBG
Pin on SAM4N
PC21
PC20
PC19
PC18
Function
GPIO0
GPIO1
GPIO2
GPIO3
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5.
5.1
Hardware revision history and known issues
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:
5.2
"nnnnrrssssssssss"
n = product identifier
r = revision
s = serial number
The kit identifier for SAM4N Xplained Pro is 1967.
Revision 2
Revision 2 of SAM4N Xplained Pro is the initial released version.
Known issues:
● In backup mode, the ERASE pin will only work with a power toggle of the SAM4N. This however can't be done by the embedded debugger because there is no switch to control the power to the target. So in cases where e.g. an application is in backup mode and the user needs access in order to program/debug it is necessary to do a manual erase procedure.
Workaround:
● Please connect ERASE test point on the bottom side of the board to VCC (3.3V) e.g. pin 4 on the
PWR header. Remove power from the board and reconnect again. The device should be erased by this procedure and it is possible to program/debug via the embedded debugger.
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6.
Document revision history
Doc. Rev.
A
Date
07/2013
Comment
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.
Atmel SAM4N Xplained Pro [USER GUIDE]
42104A-MCU-06/2013
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