USER GUIDE Atmel SAM4L8 Xplained Pro Preface

USER GUIDE Atmel SAM4L8 Xplained Pro Preface
USER GUIDE
Atmel SAM4L8 Xplained Pro
Preface
The Atmel® SAM4L8 Xplained Pro evaluation kit is hardware platform to
evaluate the ATSAM4LC8CA microcontroller.
Supported by the Atmel Studio integrated development platform, the kit provides
easy access to the features of the Atmel ATSAM4LC8CA 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
ATSAM4LC8CA.
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.
1.2.
Features .............................................................................. 3
Kit overview ......................................................................... 3
2. Getting Started ........................................................................ 6
2.1.
2.2.
2.3.
Quick-start ........................................................................... 6
Connecting the kit ................................................................. 6
Design documentation and related links ..................................... 6
3. Xplained Pro ............................................................................ 7
3.1.
3.2.
3.3.
3.4.
Embedded Debugger ............................................................. 7
Hardware Identification System ................................................ 7
Power supply ....................................................................... 8
3.3.1.
Measuring SAM4L8 power consumption ........................ 8
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.
Xplained Pro power header ....................................... 10
4. Hardware user guide ............................................................ 11
4.1.
4.2.
4.3.
4.4.
Connectors .........................................................................
4.1.1.
I/O extension headers ..............................................
4.1.2.
Segment LCD extension connector .............................
Peripherals .........................................................................
4.2.1.
QTouch button ........................................................
4.2.2.
Crystals .................................................................
4.2.3.
Mechanical buttons ..................................................
4.2.4.
LED ......................................................................
Embedded Debugger implementation ......................................
4.3.1.
Serial Wire Debug ...................................................
4.3.2.
Virtual COM port .....................................................
4.3.3.
Atmel Data Gateway Interface ...................................
Jumper description ...............................................................
4.4.1.
LDO/BUCK Jumper ..................................................
4.4.2.
LDO Jumper ...........................................................
4.4.3.
VLCD_A and VLCD_BC Jumpers ...............................
4.4.4.
VCC_MCU Jumper ..................................................
11
11
13
14
14
14
15
15
15
15
15
16
16
16
16
16
16
5. Hardware revision history and known issues ........................ 17
5.1.
5.2.
Identifying product ID and revision .......................................... 17
Revision 1 .......................................................................... 17
6. Document revision history ..................................................... 18
7. Evaluation board/kit important notice .................................... 19
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1.
Introduction
1.1
Features
●
Atmel ATSAM4LC8CA 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
●
●
1.2
One Atmel QTouch® button
Three possible power sources
●
External power
●
Embedded debugger USB
●
Target USB
●
12MHz crystal
●
32kHz crystal
Kit overview
The Atmel SAM4L8 Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel ATSAM4LC8CA.
The kit offers a set of features that enables the SAM4L8 user to get started using the SAM4L8's peripherals
right away and to get an understanding of how to integrate the SAM4L8 in their own design.
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Figure 1-1. SAM4L8 Xplained Pro evaluation kit overview.
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Figure 1-2. SAM4L8 Xplained Pro blockdiagram.
12MHz
POWER-LED
STATUS-LED
ID-BUS
SAM4L8
USB
ON/OFF
SWITCH
SWD-PROG/DEBUG BUS
DGI/CDC-BUS
BUCK/LDO
LDO
VLCD_BC
VREG
P3V3
VCC_MCU
VCC_P5V0
VLCD_A
VEXT_P5V0
VCC_TARGET
VUSBD_P5V0
POLARITY
PROTECTION
VUSBT_P5V0
EXTERN
POWER
DEBUG
USB
EDBG
TARGET
RESET
BUTTON
EXT1
EXT2
TOUCH-BUTTON
Target MCU
ATSAM4LC8CA
EXT3
USER-BUTTON
EXT4
USER-LED
SLCD
32kHz
12MHz
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2.
Getting Started
2.1
Quick-start
3 Steps to start exploring the Atmel Xplained Pro Platform
2.2
1
●
Download and install Atmel Studio .
●
Launch Atmel Studio.
●
Connect an USB cable to the DEBUG USB port.
Connecting the kit
When connecting Atmel SAM4L8 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
2
external programmer or debugger tool is needed. Please refer to the Atmel Studio user guide 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 SAM4L8 Xplained Pro.
3
1.
Xplained Pro products - 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.
SAM4L8 Xplained Pro User Guide - PDF version of this User Guide.
3.
SAM4L8 Xplained Pro Design Documentation - Package containing schematics, BOM, assembly
drawings, 3D plots, layer plots etc.
4.
Atmel Studio - Free Atmel IDE for development of C/C++ and assembler code for Atmel
microcontrollers.
5.
IAR Embedded Workbench® 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 - Atmel sample store where you can order samples of devices.
4
5
6
7
8
1
http://www.atmel.com/atmelstudio
http://www.atmel.com/atmelstudio
http://www.atmel.com/XplainedPro
4
http://www.atmel.com/Images/Atmel-42103-SAM4L8-Xplained-Pro_User-Guide.pdf
5
http://www.atmel.com/Images/Atmel-42103-SAM4L8-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
2
3
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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
1
MCU and extension boards can be purchased in the Atmel Web Store .
3.1
Embedded Debugger
The SAM4L8 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 ATSAM4LC8CA.
On the SAM4L8 Xplained Pro, the SWD interface is connected between the EDBG and the ATSAM4LC8CA.
The Virtual COM Port is connected to a UART port on the ATSAM4LC8CA (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
ATSAM4LC8CA, 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 SAM4L8 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.
Activity indicator, LED flashes
every time something happens on
the EDBG.
Bootloader mode (idle)
The power LED and the status LED blinks simultaneously.
Bootloader mode (firmware
upgrade)
The power LED and the status LED blinks in an alternating pattern.
2
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
1
2
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’
http://store.atmel.com/CBC.aspx?q=c:100113
http://www.atmel.com/Images/Atmel-42096-Microcontrollers-Embedded-Debugger_User-Guide.pdf
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3.3
Data Field
Data Type
Example Content
Minimum Voltage [mV]
uint16_t
3000
Maximum Voltage [mV]
uint16_t
3600
Maximum Current [mA]
uint16_t
30
Power supply
The SAM4L8 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 10. The
available power sources and specifications are listed in Table 3-3, “Power sources for SAM4L8 Xplained Pro”.
Table 3-3. Power sources for SAM4L8 Xplained Pro
Power input
Voltage requirements
Current requirements
Connector marking
External power
5V +/- 2 % (+/- 100mV)
for USB host operation.
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.
PWR
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)
500 mA (according to
USB spec)
DEBUG USB
Target USB
4.4V to 5.25V
(according to USB spec)
500 mA (according to
USB spec)
TARGET USB
The kit will automatically detect which power sources are available and choose which one to use according to
the following priority:
Note
3.3.1
1.
External power
2.
Embedded debugger USB
3.
Target USB
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.
Measuring SAM4L8 power consumption
As part of an evaluation of the SAM4L8 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, “SAM4L8 Xplained Pro evaluation kit overview.”.
Warning
Do not power the board without having the jumper or an ampere meter mounted. This can cause
the SAM4L8 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
3.4.2
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
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
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3.4.3
Description
Function
Pin
Pin
Function
Description
Common terminal 1
COM1
3
4
COM0
Common terminal 0
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
CTRL
49
50
ID
Xplained Pro ID line
Ground
GND
51
Xplained Pro power header
The power header can be used to connect external power to the SAM4L8 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, “SAM4L8 Xplained Pro evaluation kit overview.”
Table 3-6. Power header PWR
Note
Pin number PWR header
Pin name
Description
1
VEXT_P5V0
External 5V input
2
GND
Ground
3
VCC_P5V0
Unregulated 5V (output, derived
from one of the input sources)
4
VCC_P3V3
Regulated 3.3V (output, used as
main power for the kit)
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.
Hardware user guide
4.1
Connectors
This chapter describes the implementation of the relevant connectors and headers on SAM4L8 Xplained Pro
and their connection to the ATSAM4LC8CA. 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 SAM4L8 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
SAM4L8 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
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
LCD connector (EXT5)
Table 4-2. Extension header EXT2.
Pin on EXT2
SAM4L8 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
7
PC04
TC/1/A2
8
PC05
TC/1/B2
LCD connector (EXT5)
LCD connector (EXT5)
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Pin on EXT2
SAM4L8 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
SAM4L8 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
SAM4L8 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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4.1.2
Pin on EXT4
SAM4L8 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
Segment LCD extension connector
Extension connector EXT5 is a special connector for segment LCD displays. SAM4L8 Xplained Pro implements
one segment LCD extension connector for Xplained Pro extensions.
Table 4-5. Segment LCD display connector EXT5 .
Pin on EXT5
SAM4L8 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
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
EXT4
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Pin on EXT5
SAM4L8 pin
Function
Shared functionality
25
PA20
SEG20
EXT3 and EXT4
26
PB07
SEG21
27
PB06
SEG22
28
PA08
SEG23
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
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
50
-
ID
51
-
GND
4.2
Peripherals
4.2.1
QTouch button
EXT3
EXT1 and EXT2
EXT2
The SAM4L8 Xplained Pro kit has one QTouch button and the connection to the SAM4L8 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.
4.2.2
Pin on SAM4L8
Function
PC13
CATB_SENSE15
PC14
CATB_DIS
Crystals
The SAM4L8 Xplained Pro kit contains two crystals that can be used as clock sources for the SAM4L8 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
1
factor can be found in appnote AVR4100 .
1
http://www.atmel.com/images/doc8333.pdf
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Table 4-7. External 32.768kHz crystals.
Pin on SAM4L8
Function
XIN32
XIN32
XOUT32
XOUT32
Table 4-8. External 12MHz crystals.
4.2.3
Pin on SAM4L8
Function
PA00
XIN0
PA01
XOUT0
Mechanical buttons
The SAM4L8 Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the
SAM4L8 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.
4.2.4
Pin on SAM4L8
Silkscreen text
RESET_N
RESET
PC24
SW0
LED
There is one yellow LED available on the SAM4L8 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.
4.3
Pin on SAM4L8
LED
PC07
Yellow LED0
Embedded Debugger implementation
The SAM4L8 Xplained Pro contains an Embedded Debugger (EDBG) that can be used to program and debug
the ATSAM4LC8CA 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 SAM4L8 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.
4.3.2
Pin on SAM4L8
Function
TCK
SWD clock
PA03
SWD data
PA23
SWD trace data
Virtual COM port
The Embedded Debugger act as a Virtual Com Port gateway by using one of the ATSAM4LC8CA 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 SAM4L8
Function
PC27
UART TXD (SAM4L8 TX line)
PC26
UART RXD (SAM4L8 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 SAM4L8 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 SAM4L8
Function
PC29
USART TXD (SAM4L8 TX line)
PC28
USART RXD (SAM4L8 RX line)
PC31
USART CLK
Table 4-14. DGI interface connections when using TWI.
Pin on SAM4L8
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 SAM4L8 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.
4.4
Pin on SAM4L8
Function
PB05
GPIO
PB06
GPIO
PB07
GPIO
PB10
GPIO
Jumper description
The SAM4L8 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, “SAM4L8 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 SAM4L8 Xplained Pro is 1988.
5.2
Revision 1
Revision 1 of SAM4L8 Xplained Pro is the initial released version, there are no known issues.
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6.
Document revision history
Doc. Rev.
Date
Comment
A
06/2013
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.
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Atmel Corporation
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© 2013 Atmel Corporation. All rights reserved. / Rev.: 42103A-MCU-06/2013
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