User Guide for the Evaluation Kit ATAK55002-V1 and the

User Guide for the Evaluation Kit ATAK55002-V1 and the
APPLICATION NOTE
User Guide for the Evaluation Kit ATAK55002-V1 and the
ATAK55002-V2 and ATAK55002-V3 Extension Boards
ATAN0104
Features
● User guide for the evaluation kit ATAK55002-V1 and extension boards
ATAK55002-V2 and -V3
● This kit demonstrates a Flash application with the
● ATAK55002-V1 evaluation kit:
with the Atmel® SIGFOX™ ATA8520 transmitter device and an Atmel
ATmega328P AVR® microcontroller with AT30TS75A temperature sensor as a
battery-powered kit for standalone operation
● ATAK55002-V2 and -V3 extension boards:
Includes Atmel SIGFOX ATA8520 transmitter device with an AT30TS75A
temperature monitoring device. An additional MCU application development kit,
i.e. Xplained mini or Arduino UNO is required.
Description
This user guide describes an evaluation kit and the extension boards for a SIGFOX
application. This application uses an Atmel ATmega328P AVR microcontroller to
read out an AT30TS75A temperature sensor using the built-in TWI connection and controls
the RF telegram transmission using the SIGFOX ATA8520 transmitter device. This application requires a SIGFOX base station infrastructure to capture the RF telegram and supply
payload data at the SIGFOX back end of the SIGFOX Cloud. For more information on operating the SIGFOX network and SIGFOX Cloud, see http://www.sigfox.com information.
The evaluation and development kit tool packs are available for download from the Atmel
website: http://www.atmel.com/devices/ATA8520.aspx. These tool packs include
● The ATAN0054 quick start guide for the kit and the Atmel ATAN0104 user guide
● The schematic, layout and Gerber data for the ATAB0101A PCB
● The source code for the Atmel ATmega328P as an Atmel Studio 6 project
The Atmel ATA8520 SIGFOX transmitter is a SIGFOX-certified device which includes the
complete SIGFOX protocol stack to operate in the SIGFOX network within the 868MHz
ISM band. The device is controlled from any host MCU using the SPI commands as
described in the datasheet [1]. Included in the tool pack is a ATA8520 library as C source
code for the SPI commands.
9373B-AUTO-02/15
References
[1]
Atmel® ATA8520 datasheet and user guide
[2]
Atmel AT30TS75A datasheet
[3]
http://www.sigfox.com
[4]
http://backend.sigfox.com
[5]
http://www.atmel.com/devices/ATA8520.aspx
[6]
Atmel ATAN0054 – ATAK55002-V1/2/3 quick start guide
[7]
ATA55002-V123_Tool_pack_V1.0.zip
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1.
Getting Started with the ATAK55002-V1 Kit
Figure 1-1 shows the components which are included in the evaluation kit. The kit includes
● A single PCB ATAB0101A with
●
●
An Atmel® ATA8520 SIGFOX™ transmitter device
●
An Atmel ATmega328P AVR® microcontroller at 8MHz
●
An AT30TS75A temperature sensor with TWI
An 868MHz monopole antenna for connection to the SMA connector
The kit requires an external power supply or battery for 3.0V to 3.3V at 50mA which is not included in the kit.
Figure 1-1. ATAK55002-V1 Kit Components
The 868MHz monopole antenna is connected to the SMA connector of the PCB and the external power supply or battery has
to be connected to connector X1.
Caution:
Ensure correct polarity at the connection to avoid damage to the equipment. The PCB has no reverse polarity
protection for the power supply connection.
The kit comes with preconfigured devices for starting the Flash application of the Atmel ATmega328P once the power is
applied. This application controls the RF telegram transmission and reads out the temperature sensor at one-hour intervals
or when pressing the SW1 button. The red LED1 starts blinking for about 7-8s, i.e. during telegram transmission. The device
then enters power-down mode until a wake-up from the internal timer or a button press occurs.
The Atmel ATA8520 device includes the SIGFOX ID and PAC registration code (see label attached to PCB) to register the
kit with the user's account for the SIGFOX back end. The user has to open a SIGFOX cloud account to access the back end.
From this account the data payload transmitted from the devices can be retrieved in various ways as described in the
SIGFOX online help.
An Atmel debugger (Atmel JTAGICE3 or Atmel ICE), which can be connected to connector XISP1, is required for application
development. Please see the marker for pin1 to connect with the correct orientation. The debugger can only be used if
Atmel Studio 6 is installed in the front end. Atmel Studio 6 can be downloaded from http://www.atmel.com with additional
user instructions and tools. The documentation for the kit components and for the software is included in the tool pack zip
folder [7] which can be downloaded from the Atmel website [5].
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3
2.
Getting Started with the ATAK55002-V2 and -V3 Extension Boards
Figure 2-1 and Figure 2-2 show the components which are required for the evaluation kit. The kit includes
● A single PCB ATAB0101A with
●
●
An Atmel® ATA8520 SIGFOX™ transmitter device
●
An AT30TS75A temperature sensor with TWI
An 868MHz monopole antenna for connection to the SMA connector
The kit is available in two versions depending on the connector type of the additionally required development kit:
● An ATAK52002-V2 Xplained mini (Figure 2-1): to be used with an additional Xplained mini or Arduino UNO kit
●
An ATAK52002-V3 Xplained PRO (Figure 2-2): to be used with an additional Xplained PRO kit.
Figure 2-1. ATAK55002-V2 Xplained Mini Extension Board with Attached External Antenna
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ATAN0104 [APPLICATION NOTE]
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Figure 2-2. ATAK55002-V3 Xplained PRO Extension Board with SAMD21 Xplained PRO Kit
The 868MHz monopole antenna is connected to the SMA connector of the PCB and the board is powered from the attached
evaluation kit using 3V/5V for the ATAK55002-V2 Xplained Mini and 3V for the ATAK55002-V2 Xplained PRO.
The following Flash applications are available as part of tool pack distribution:
● Xplained mini – Atmega328P application at 5V/16MHz
●
●
Arduino UNO sketch and library at 5V/16MHz
SAMD21 application for Xplained PRO at 3V/48MHz
This application controls the RF telegram transmission and reads out the temperature sensor at 15-minute intervals or when
pressing the SW1 button. The red LED1 starts blinking for about 7-8s, i.e. during telegram transmission. The device then
runs in a main loop until an event from the internal timer or a button press occurs.
The ATA8520 device includes the SIGFOX ID and PAC registration code (see label attached on the PCB) to register the kit
with the user's SIGFOX back-end account. The user has to open a SIGFOX cloud account to access the back end. From this
account the data payload transmitted from the devices can be retrieved in various ways as described in the SIGFOX online
help.
The Atmel debugger included in the development kits can be used for application development. Application development
and use of the debugger is only possible if Atmel Studio 6 is installed in the front end. Atmel Studio 6 can be downloaded
from http://www.atmel.com with additional user instructions and tools. The documentation for the kit components and for the
software is included in the tool pack zip folder [7] which can be downloaded from
http://www.atmel.com/devices/ATA8520.aspx.
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5
3.
Tool Pack for the Kits
The tool pack zip folder [7] contains the documentation and software for the kit. Extract the folder into a directory on the PC
to get the following structure:
..\Application_Notes
documentation for the kit and the application notes for the devices
..\Documentation
data sheets of the devices
..\Hardware
hardware documentation of the boards
..\Software
software for the kit
..\Software\ATAK55002-V1
Atmel® Studio 6 project directory for ATAK55002-V1 kit with ATmega328P
..\Software\ATAK55002-V2
Atmel Studio 6 project directory for ATAK55002-V2 board with Atmega328P
..\Software\ATAK55002-V3
Atmel Studio 6 project directory for ATAK55002-V3 board with SAMD21
4.
ATA8520 SIGFOX Certified Transmitter
The Atmel ATA8520 SIGFOX™ transmitter includes the SIGFOX protocol library and a SPI communication interface for
controlling device operation. The transmitter buffer of the device is loaded with a max. of 12 bytes of payload data for
transmission in the 868MHz ISM band. The Atmel ATA8520 device is certified by SIGFOX to participate in their network. A
second certification step for the module or system including antenna is also required with a classification of the module or
system RF performance, i.e. radiated RF output power. As a result, the RF path including antenna must also have SIGFOX
certification.
The key parameters for the RF telegram are:
● RF channels:
868.0 to 868.6MHz
●
●
●
●
RF output power:
max. 14.5dBm
Data rate:
100bit/s with DBPSK modulation
Data payload:
max. 12byte with LSB first
Duty cycle:
max. 5 telegrams/hour, i.e. < 1%
The data transmission is AES encrypted.
The SIGFOX ID and PAC registration code are printed on a label attached to the PCB and can also be read out from the
device using the SPI command interface. This ID and code are required for registering the device with the user's account for
the SIGFOX back end.
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5.
ATAB0101A PCB Description
Figure 5-1 on page 8 shows the ATAB0101A PCB used as a platform for the SIGFOX™ kits. It works in three different modes
depending on the component mounted on the PCB:
1. Battery powered standalone operating mode for the ATAK55002-V1 kit:
●
Includes the Atmel® ATA8520 SIGFOX device
●
Includes the Atmel ATmega328P AVR® microcontroller with 8MHz internal clock and external 32.768kHz
crystal
●
Includes the AT30TS75A temperature sensor with TWI
●
Includes an ATAES132 crypto device (currently not in use)
●
Includes an SMA antenna connector for an 868MHz external monopole antenna
●
Two LEDs:
i.
●
ii.
Red LED LD2 connected to port pin PD5 and connector X2/pin8 and X6/pin6 for the user application
User button SW1 connected to port pin PD6 and to connectors X2/pin4 and X6/pin7
●
Supply voltage divider connected to pin ADC0 to measure the battery voltage against the internal 1.1V
reference
●
Includes the footprint for the following TWI sensor devices:
i.
2.
BMP180 air pressure sensor
ii.
HTU20D/SHT20 humidity sensor
Operating mode with an additional Xplained mini or Arduino UNO kit for the ATAK55002-V2 extension board using
an ATmega328P:
●
Includes the Atmel ATA8520 SIGFOX device
●
Includes the AT30TS75A temperature sensor with TWI
●
Includes an ATAES132 crypto device (currently not in use)
●
Includes an SMA antenna connector for an 868MHz external monopole antenna
●
Two LEDs:
i.
●
Green LED LD1 to indicate the sensor power
ii.
Red LED LD2 connected to port pin PD5 and connector X2/pin8 and X6/pin6 for the user application
User button SW1 connected to port pin PD6 and to connectors X2/pin4 and X6/pin7
●
Supply voltage divider connected to pin ADC0 to measure the supply voltage against the internal 1.1V
reference
●
Includes the footprint for the following TWI sensor devices:
i.
●
3.
Green LED LD1 to indicate the sensor power
BMP180 air pressure sensor
ii.
HTU20D / SHT20 humidity sensor
Includes the connectors X3, X4, X5 and X6 for connecting the PCB on top of an Xplained mini or an Arduino
UNO board
Operating mode with an additional Xplained PRO kit for the ATAK55002-V3 extension board using a SAMD21:
●
Includes the Atmel ATA8520 SIGFOX device
●
Includes the AT30TS75A temperature sensor with TWI
●
Includes an ATAES132 crypto device (currently not in use)
●
Includes an SMA antenna connector for an 868MHz external monopole antenna
●
Two LEDs:
i.
●
Green LED LD1 to indicate the sensor power
ii.
Red LED LD2 connected to port pin PD5 and connector X2/pin8 and X6/pin6 for the user application
User button SW1 connected to port pin PD6 and to connectors X2/pin4 and X6/pin7
ATAN0104 [APPLICATION NOTE]
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7
●
Supply voltage divider connected to pin ADC0 to measure the supply voltage against the internal 1.1V
reference
●
Includes the footprint for the following TWI sensor devices:
i.
●
BMP180 air pressure sensor
ii.
HTU20D / SHT20 humidity sensor
Includes the connector X2 to for connecting the PCB to an Xplained PRO board
Figure 5-1. ATAB0101A Board
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5.1
ATAK55002-V1 Power Consumption and Battery Selection
When using the PCB in standalone mode, the AVR® microcontroller can be set to a power-down mode while running the
Timer2 with the external 32.768kHz crystal. This will reduces the mean current consumption to ~10 to 20µA (see Table 5-1
for 5 messages per day). In this mode the sensor power is switched off and the Atmel® ATA8520 device is in OFF mode and
the MCU only wakes up by pressing the button, applying an external interrupt signal or from the internal Timer2 interrupt.
Figure 5-2 shows the typical current consumption profile from the different operating modes of the Flash application during a
telegram transmission. This allows the calculation of a mean current consumption depending on the wake-up intervals.
The shown current profile is a typical profile and depends on the Flash application of the Atmel ATmega328P device and the
attached sensors.
Figure 5-2. Standalone Mode Current Consumption at 24°C
Table 5-1 summarizes battery service life for a typical Lithium battery which can be used with the ATAB0101A. When
selecting the battery, it is important to know the peak current consumption which has to be supplied by the battery cells. It is
assumed that the battery voltage drops from the initial value of 3V down to 2V at the end of its service life. The self-discharge
is defined by the manufacturer as typically 1% per year at an ambient temperature of 20°C.
Table 5-1.
Battery Life at 20°C
Battery Lifetime (Days and Years)
3V Lithium Battery (1800mAh)
Messages/Day
Note:
1.
Mean Current [mA]
(1)
Days
Years
140
0.421
178
0.5
100
0.301
249
0.7
50
0.151
497
1.4
20
0.061
1230
3.4
5
0.016
4689
12.8
The mean current values shown in the table are only for indication and cannot be taken as reference.
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5.2
Connector Description
The PCB has several connectors which are used differently depending on the PCB configuration. Table 5-2 summarizes the
connectors and how different PCB versions are used.
The placement of the connectors at the PCB is shown in Figure 5-1 on page 8.
Table 5-2.
5.2.1
ATAB0101A Connectors
Connector
ATAK55002-V1 Standalone
Version
ATAK55002-V3
Xplained PRO Extension
ATAK55002-V2 Xplained
Mini Extension
X1 ext. power
External 3V power supply
--
--
X2 Xplained PRO
--
Extension connector
--
X3 Xplained mini
--
--
Shield connector1
X4 Xplained mini
--
--
Shield connector2
X5 Xplained mini
--
--
Shield connector3
X6 Xplained mini
--
--
Shield connector4
X7 RF debug
--
--
--
X8 sensor
External sensors
External sensors
External sensors
J1 RF config.
PB0/PB1 pin usage
PB0/PB1 pin usage
PB0/PB1 pin usage
XISP1
ISP-microcontroller connector
--
--
XISP2
--
--
--
Connector X1
Connector X1 is used for supplying an external 3V power source for standalone battery powered applications for the
ATAK55002-V1 kit.
10
Caution:
These pins have no reverse polarity protection.
Table 5-3.
Connector X1
Function
Pin
Pin
Function
+3.3V
1
2
GND
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5.2.2
Connector X2
Connector X2 is used for connecting to an XplainedPRO MCU kit. In this connection mode the PCB is supplied with 3V of
power from the XplainedPRO MCU board.
Table 5-4.
5.2.3
Connector X2
Function
Pin
Pin
Function
ID_data
1
2
GND
PC0 (PB00)
3
4
SW1 (PB01)
PB1/RF_NRES (PB06)
5
6
PB0/RF_PWRON (PB07)
SNS_PWR (PB02)
7
8
LED1 (PB03)
RF_EVNT (PB04)
9
10
AES_NSS (PB05)
SDA (PA08)
11
12
SCL (PA09)
PD0 (PB09)
13
14
PD1 (PB08)
RF_NSS (PA05)
15
16
MOSI (PA06)
MISO (PA04)
17
18
SCK (PA07)
GND
19
20
+3.3V
Connectors X3, X4, X5 and X6
Connectors X3, X4, X5 and X6 are used for connecting to an Xplained mini or Arduino UNO kit. In this connection mode the
PCB is supplied with 3V and 5V of power from the Xplained mini or Arduino UNO board.
Connector X3 is used for supplying power to the add-on boards.
Table 5-5.
Connector X3
Function
Pin
-
1
-
2
-
3
+3.3V
4
+5V
5
GND
6
GND
7
-
8
Connector X4 is used for the port C pins of the MCU.
Table 5-6.
Connector X4
Function
Pin
PC0
1
PC1
2
PC2
3
PC3
4
PC4/SDA
5
PC5/SCL
6
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Connector X5 is used for the port B pins of the MCU. Pins 1 to 6 are connected to a 3V/5V level shifter to convert the signals
to 3V at PCB level.
Table 5-7.
Connector X5
Function
Pin
PB0/RF_PWRON
1
PB1/RF_NRES
2
PB2/RF_NSS
3
PB3/MOSI
4
PB4/MISO
5
PB5/SCK/LED
6
GND
7
-
8
-
9
-
10
Connector X6 is used for the port D pins of the MCU. Pins 3 and 8 are connected to a 3V/5V level shifter to convert the
signals to 3V at PCB level.
Table 5-8.
5.2.4
Connector X6
Function
Pin
PD0
1
PD1
2
PD2/RF_EVNT
3
PD3/SNS_PWR
4
PD4
5
PD5/LED1
6
PD6/SW1
7
PD7/AES_NSS
8
Connector X7
Connector X7 is not typically mounted. These Atmel® ATA8520 pins can also be used as supplementary I/O pins.
Table 5-9.
12
Connector X7
Function
Pin
RPC1/RF_NPRON1
1
RPC2/RF_TRPA
2
RPC3/RF_TMDO
3
RPC4/RF_TMDI
4
RPC5/RF_TRPB
5
RPB7/RF_RX_ACTIVE
6
ATAN0104 [APPLICATION NOTE]
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5.2.5
Connector X8
Connector X8 is not typically mounted and is used for the TWI bus connection with the switched power supply. This
connector can be used to attach additional sensors and devices with the TWI connection. The power consumption is limited
to ~50mA.
Table 5-10.
5.2.6
Connector X8
Function
Pin
+3.3Vsens
1
SDA
2
SCL
3
GND
4
Connector J1
The connector J1 is used for connecting the PWRON and NRES pins of the ATA8520 to the PB0 and PB1 port pins of the
MCU. If the PB0 and PB1 pins are used for other purposes, these connections are removed. In this case the PWRON pin
can be connected to pin NSS of the ATA8520 using the 0 resistor BR8. A device reset can also be forced using the
“system reset” SPI command.
Table 5-11. Connector J1
5.2.7
Function
Pin
Pin
Function
RF_PWRON
1
2
PB0
RF_NRES
3
4
PB1
Connector ISP-TRX
Connector ISP-TRX is not mounted and is not required for applications.
Table 5-12. Connector ISP-TRX
5.2.8
Function
Pin
Pin
Function
MISO
1
2
VCC
SCK
3
4
MOSI
nRES
5
6
GND
Connector ISP-microcontroller
Connector ISP-microcontroller is used for ATmega328P programming and debugging for the kit ATAK55002-V1. This
connector is not mounted in the ATAK55002-V2 kit.
Table 5-13. Connector ISP-microcontroller
Function
Pin
Pin
Function
MISO
1
2
VCC
SCK
3
4
MOSI
nRES
5
6
GND
ATAN0104 [APPLICATION NOTE]
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13
5.3
LED, Button and Sensors
The green LED LD1 is connected to the sensor power and indicates if the sensor power is switched on.
The red LED LD2 is connected to port PD5 on Atmel® ATmega328P and to the connectors X2/pin8 and X6/pin6 and can be
controlled by the MCU application.
The button SW1 is connected to port PD6 on Atmel ATmega328P and to the connectors X2/pin4 and X6/pin7 and can be
read by the MCU application.
The PCB contains a temperature sensor connected to the TWI bus of the MCU and in addition two footprints for additional
sensors, i.e. an air pressure sensor and a humidity sensor device. With the TWI connector X8 additional sensors can be
connected as long as the current on the 3.3V supply will not exceed 50mA.
The PCB contains also a AES crypto device connected to the SPI bus which can be controlled from the MCU or from the RF
device. Currently only the MCU will control this device using the AES_NSS signal for the chip select. This chip select is
connected to port pin PD7 and to the connectors X2/pin10 and X6/pin8.
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ATAN0104 [APPLICATION NOTE]
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6.
Application Description
The Flash application for both kits is set up in the same way with the exceptions described in Table 6-1. The main differences
are found in the CPU and system and Timer2 clock and sleep modes.
Table 6-1.
Flash Application Differences
Feature
ATAK55002-V1
ATAK55002-V2
Xplained Mini
ATAK55002-V3
Xplained PRO
Oscillator and CPU clock
Internal 8MHz RC oscillator
External 16MHz clock
External 32.768kHz crystal
Timer2
External 32.768kHz crystal
Internal system clock 16MHz
Internal system clock 48MHz
Sleep mode
Power down mode
Idle in main loop
Idle in main loop
System clock
8MHz
16MHz
48MHz
The source code for all applications is available within the tool pack distribution [7].
The program flow for the Flash application is illustrated in Figure 6-1. The application first initializes all required peripherals
such as pins, timers, SPI, ADC, UART, TWI and the ATA8520 SIGFOX transmitter by reading out the ID/PAC information
required for SIGFOX™ registration. This ID/PAC data is send via the UART interface to a PC terminal application. The
Timer2 is used as a real-time clock and uses either the
● External 32.768kHz crystal for the ATAK51002-V1 kit or the
●
Internal system clock for the ATAK55002-V2 and -V3 kits.
Timer2 is configured to wake up the MCU every hour or every 15 minutes. Pressing button SW1 also causes the MCU to
wake up. The temperature sensor is powered up and read out and after this a data telegram is transmitted. The device then
enters power-down mode again until the next wake-up by the RTC (or manually by pressing SW1).
Figure 6-1. Flash Application Flow Chart
Start
Switch sensor power RF
transmitter and LED on
Initialisation 1
Init pins, Timer0, Timer2,
SPI, ADC
Read-out temp. sensor
and convert result
Initialisation 2
Init UART, TWI, ATA8520 and
read and print ID/PAC
Switch sensor power off
Switch to power-down mode
Load data in TX buffer
and transmit
(ATAK55002-V1 only)
Timer2 event
or button
pressed?
no
yes
no
Is transmit
finished?
Blink LED
yes
Switch RF transmitter
and LED off
Check and wait if button
released
ATAN0104 [APPLICATION NOTE]
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6.1
Software Development
Atmel® Studio 6 is required for software development and can be downloaded from the Atmel website [5]. The tool pack [7]
with software and documentation is also required. When unpacking the tool pack, the folder structure as described in Section
3. “Tool Pack for the Kits” on page 6 is generated.
Four different applications and folder structures are included with sample applications for the kit versions.
..\ATAK55002-V1\ATAB0101A
ATmega328P project for ATAK55002-V1 kit
..\ATAK55002-V2\XplainedMini_SW
Xplained Mini project for ATAK55002-V2 kit
..\ATAK55002-V2\ArduinoUNO_SW
Arduino IDE sketch for ATAK55002-V2 kit
..\ATAK55002-V3\SAMD21_XplainedPRO_SW
SAMD21 Xplained PRO project for ATAK55002-V3 kit
The Atmel Studio 6 installation makes all USB drivers and debugger supports available when plugging in the development
kits. Not included is the ATAK55002-V1 standalone kit which requires an AVR® debugger to be connected to the connector
ISP-microcontroller for debugging and programming.
When using the Arduino UNO sketch application, the Arduino IDE has to be installed first along with the Atmel ATA8520
library.
16
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7.
Revision History
Please note that the following page numbers referred to in this section refer to the specific revision mentioned, not to this
document.
Revision No.
History
Title on page 1 updated
Section “Features” on page 1 updated
Section “Description” on page 1 updated
Section “References” on page 2 updated
Section 1 “Getting Started with the ATAK55002-V1 Kit” on page 3 updated
9373B-AUTO-02/15
Section 2 “Getting Started with the ATAK55002-V2 and -V3 Extension Boards” on
page 4 updated
Section 3 “Tool Pack for the Kits” on page 6 updated
Section 5 “ATAB0101A PCB Description” on page 7 updated
Table 5-2 “ATAB0101A Connectors” on page 10 updated
Section 6 “Application Description” on pages 15 to 16 updated
ATAN0104 [APPLICATION NOTE]
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