View detail for SAM B11 Xplained Pro User Guide

View detail for SAM B11 Xplained Pro User Guide
ATSAMB11 BluSDK SMART
SAM B11 Xplained Pro
USER GUIDE
Preface
®
The Atmel SAM B11 Xplained Pro evaluation kit is a hardware platform to
evaluate the ATSAMB11G18A microcontroller.
Supported by the Atmel Studio integrated development platform, the kit
provides easy access to the features of the Atmel ATSAMB11G18A 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 ATSAMB11G18A.
The Xplained Pro extension kits offers additional peripherals to extend the
features of the board and ease the development of custom designs.
Atmel-42664A-ATSAMB11-Xplained-Pro_User Guide-02/2016
Table of Contents
Preface............................................................................................................................ 1
1. Introduction................................................................................................................ 3
1.1.
1.2.
Features....................................................................................................................................... 3
Kit Overview................................................................................................................................. 3
2. Getting Started...........................................................................................................5
2.1.
2.2.
Xplained Pro Quick Start.............................................................................................................. 5
Design Documentation and Relevant Links................................................................................. 5
3. Xplained Pro.............................................................................................................. 6
3.1.
3.2.
3.3.
3.4.
3.5.
3.6.
Xplained Pro.................................................................................................................................6
Embedded Debugger................................................................................................................... 6
Xplained Pro Analog Module........................................................................................................7
3.3.1.
Overview........................................................................................................................7
3.3.2.
EDBG Interface..............................................................................................................8
3.3.3.
Sample Rate.................................................................................................................. 8
3.3.4.
Measurement Ranges and Accuracy.............................................................................8
Hardware Identification System....................................................................................................9
Power Sources............................................................................................................................. 9
Xplained Pro Headers and Connectors......................................................................................10
3.6.1.
Xplained Pro Standard Extension Header................................................................... 10
3.6.2.
Xplained Pro Power Header.........................................................................................11
4. Hardware User Guide.............................................................................................. 12
4.1.
Connectors................................................................................................................................. 12
4.1.1.
Xplained Pro Extension Headers.................................................................................12
4.1.2.
VDDIO Header.............................................................................................................14
4.1.3.
Current Measurement Header..................................................................................... 14
4.1.4.
Cortex Debug Connector............................................................................................. 14
4.2.
Peripherals................................................................................................................................. 15
4.2.1.
Crystals........................................................................................................................15
4.2.2.
Mechanical Buttons..................................................................................................... 15
4.2.3.
LED..............................................................................................................................16
4.2.4.
Debug I2C and UART.................................................................................................. 16
4.3.
4.2.5.
Battery header............................................................................................................. 16
4.2.6.
Temperature Sensor.................................................................................................... 17
Embedded Debugger Implementation........................................................................................17
4.3.1.
Serial Wire Debug........................................................................................................17
4.3.2.
Virtual COM Port..........................................................................................................17
4.3.3.
Atmel Data Gateway Interface.....................................................................................18
4.3.4.
SAM B11 Xplained Pro XAM Configuration................................................................. 18
5. Document Revision History..................................................................................... 20
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1.
Introduction
1.1.
Features
•
•
•
•
•
•
•
•
•
•
•
•
1.2.
ATSAMB11G18A microcontroller
Bluetooth Host and Device mode
One mechanical reset button
One mechanical programmable button
One yellow user LED
Battery header (1x2 100mil header)
32.768kHz crystal
Two Xplained Pro extension headers
Embedded Debugger
– Auto-ID for board identification in Atmel Studio
– One yellow status LED
– One green board power LED
– Symbolic debug of complex data types icluding scope information
– Programming and debugging, including power measurements
– Data Gateway Interface: SPI, I2C, four GPIOs
– Virtual COM port (CDC)
Embedded current measurement circuitry, with Atmel Data Visualizer support for data visualization
USB powered
Supported with application examples in Atmel Software Framework
Kit Overview
The Atmel SAM B11 Xplained Pro evaluation kit is a hardware platform to evaluate the Atmel
ATSAMB11G18A.
The kit offers a set of features that enables the ATSAMB11G18A user to get started with the SAM B
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. SAM B11 Xplained Pro Evaluation Kit Overview
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2.
Getting Started
2.1.
Xplained Pro Quick Start
Steps to start exploring the Atmel Xplained Pro platform:
1. Download Atmel Studio.
2. Launch Atmel Studio.
3. Connect a USB cable (Standard-A to Micro-B or Micro-AB) between the PC and the DEBUG USB
port on the kit.
When the Xplained Pro MCU kit is connected to your computer for the first time, the operating system will
®
perform a driver software installation. The driver file supports both 32- and 64-bit versions of Microsoft
®
®
Windows XP, Windows Vista , Windows 7, and Windows 8.
Once the Xplained Pro MCU board is powered the green power LED will be lit and Atmel Studio will auto
detect which Xplained Pro MCU- and extension board(s) are connected. Atmel Studio will present
relevant information like datasheets and kit documentation. The kit landing page in Atmel Studio also has
the option to launch Atmel Software Framework (ASF) example applications for the kit. The SAM B11
device is programmed and debugged by the on-board Embedded Debugger and therefore no external
programmer or debugger tool is needed.
2.2.
Design Documentation and Relevant Links
The following list contains links to the most relevant documents and software for the SAM B11 Xplained
Pro.
•
•
•
•
•
•
Xplained Pro products - Atmel Xplained Pro is a series of small-sized and easy-to-use evaluation
kits for Atmel microcontrollers and other Atmel products. It consists of a series of low-cost MCU
boards for evaluation and demonstration of features and capabilities of different MCU families.
Atmel Studio - Free Atmel IDE for development of C/C++ and assembler code for Atmel
microcontrollers.
Atmel sample store - Atmel sample store where you can order samples of devices.
EDBG User Guide - User guide containing more information about the on-board Embedded
Debugger.
®
®
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 16KB for devices with M0, M0+, and M1 cores
and 32KB for devices with other cores.
Atmel Data Visualizer - Atmel Data Visualizer is a program used for processing and visualizing
data. Data Visualizer can receive data from various sources such as the Embedded Debugger Data
Gateway Interface found on Xplained Pro boards and COM ports.
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3.
Xplained Pro
3.1.
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, which 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,
which are connected through a set of standardized headers and connectors. Each extension board has
an identification (ID) chip to uniquely identify which boards are connected to an Xplained Pro MCU board.
This information is used to present relevant user guides, application notes, datasheets, and example
code through Atmel Studio.
3.2.
Embedded Debugger
The SAM B11 Xplained Pro contains the Atmel Embedded Debugger (EDBG) for on-board debugging.
The EDBG is a composite USB device of three interfaces; a debugger, Virtual COM Port, and a Data
Gateway Interface (DGI).
Together with Atmel Studio, the EDBG debugger interface can program and debug the ATSAMB11G18A.
On SAM B11 Xplained Pro, the SWD interface is connected between the EDBG and the
ATSAMB11G18A.
The Virtual COM Port is connected to a UART on the ATSAMB11G18A and provides an easy way to
communicate with the target application through terminal software. It offers variable baud rate, parity, and
stop bit settings. Note that the settings on the ATSAMB11G18A must match the settings given in the
terminal software.
Info: The virtual COM port in the EDBG requires the terminal software to set the data terminal
ready (DTR) signal to enable the UART pins connected to the ATSAMB11G18A. If the DTR
signal is not enabled the UART pins on the EDBG is kept in high-z (tristate) rendering the COM
port unusable. The DTR signal is set automatically by some terminal software, but it may have
to be manually enabled in your terminal.
The DGI consists of several physical interfaces for communication with the host computer.
Communication over the interfaces is bidirectional. It can be used to send events and values from the
ATSAMB11G18A 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. Atmel Data Visualizer is used to send and receive data through DGI.
The EDBG controls two LEDs on SAM B11 Xplained Pro; a power LED and a status LED. The table
below shows how the LEDs are controlled in different operation modes.
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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
when any communication
happens to 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.
For further documentation on the EDBG, see the EDBG User Guide.
Xplained Pro Analog Module
3.3.1.
Overview
The Xplained Pro Analog Module (XAM) extends the embedded debugger with high dynamic range
current measurement. This enables power profiling of the target system.
Current output
3.3.
Calibration
circuitry
GPIO(s)
Control MCU
Sync
GPIO
I2C
Calibration ON/OFF
GPIO
SPI
EDBG
Clock sync
Range selection
voltage
reference
2.7V
SWD
AREF
100 Ohm
100 mOhm
Pre-amplifier
2x
ADC0
ADC1
20x20x
S&H
ADC
16x
GND
Active filter with
gain
Current input
GPIO
Xplained Pro Analog Module (XAM)
The XAM consists of:
•
•
•
•
Calibration circuitry
Voltage reference
Analog frontend
– Shunt resistors with a range selection switch
– Pre-amplifier
– Two active filters with gain
Control MCU
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–
–
–
Analog to digital converter
Signal processing
Control/communication interface to the EDBG
The current measurement frontend is a high side shunt measurement with a pre-amplifier and a second
active filter stage with gain. The wide dynamic range is achieved by four measurement ranges which are
defined by two shunts and the two parallel second stage active filters with gain.
3.3.2.
EDBG Interface
The Xplained Pro Analog Module (XAM) is connected to the EDBG with the following interfaces:
•
•
•
•
•
•
I2C: This is used to control and configure the XAM
SPI: Current measurement data is streamed to the EDBG via this interface. This is a one-way data
transfer channel from the XAM to the EDBG
SWD: The MCU in the XAM is programmed via SWD from the EDBG
GPIO: At least one GPIO that is connected to the EDBG from the target MCU is also connected to
the current measurement unit to enable the user to sync current measurements with his application
Clock sync: Synchronization signal to synchronize ADC measurements with EDBG
Reference clock: Reference clock for the XAM
3.3.3.
Sample Rate
The raw sampling rate of the Xplained Pro analog module (XAM) is up to 250kHz and with the default
averaging configuration (average of 16 samples) the actual output of the XAM is 16.67kSPS (note that
the XAM output sample rate is not an integer fraction of the raw sampling).
3.3.4.
Measurement Ranges and Accuracy
The Xplained Pro analog module has four measurement ranges. These are defined by two shunt resistors
and two gain stages.
Measurement
range
Hardware
Resolution Accuracy
Comments
Range 1
Low current shunt and
high gain stage
20nA
1 LSB ±1% Below 1μA the error will
increase. Typical error for
300nA is 1 LSB ± 10%
Range 2
Low current shunt and
low gain stage
150nA
1 LSB ±1%
Range 3
High current shunt and
high gain stage
10μA
1 LSB ±1%
Range 4
High current shunt and
low gain stage
100μA
1 LSB ±1% Above 100mA the error will
increase to 1 LSB ±5% at
400mA. Maximum current is
400mA
The ranges are switched automatically by the XAM to achieve best measurement results and the
currently active range is visualized in the Atmel Data Visualizer frontend tool. The maximum voltage drop
over the shunt resistor is 100mV and the XAM will switch the range automatically before this limit is
reached.
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3.4.
Hardware Identification System
™
All Xplained Pro compatible extension boards have an Atmel ATSHA204 CryptoAuthentication chip
mounted. This chip contains information that identifies the extension with its name and some extra data.
When an Xplained Pro extension 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. The table below shows the data fields stored in the ID
chip with example content.
Table 3-2. Xplained Pro ID Chip Content
3.5.
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’
Minimum Voltage [mV]
uint16_t
3000
Maximum Voltage [mV]
uint16_t
3600
Maximum Current [mA]
uint16_t
30
Power Sources
The SAM B11 Xplained Pro kit can be powered by several power sources as listed in the table below.
Table 3-3. Power Sources for SAM B11 Xplained Pro
Power input
Voltage requirements
Current requirements
Connector marking
External power
5V ±2% (±100mV) for
USB host operation.
4.3V to 5.5V if USB host
operation is not
required.
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
Embedded debugger
USB
4.4V to 5.25V (according 500mA (according to
to USB spec.)
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.
2.
External power.
Embedded Debugger USB.
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Note: The selection for the supply of the Target MCU has a separate connector. The above priority
selects which supply is used to power the EDBG and the VCC_P3V3_CON.
Info: External power is required when 500mA from a USB connector is not enough to power
the board with possible extension boards. A connected USB device in a USB host application
might easily exceed this limit.
3.6.
Xplained Pro Headers and Connectors
3.6.1.
Xplained Pro Standard Extension Header
All Xplained Pro kits have one or more dual row, 20-pin, 100mil extension header. Xplained Pro MCU
boards have male headers, while Xplained Pro extensions have their female counterparts. Note that all
pins are not always connected. All connected pins follow the defined pin-out description in the table
below.
The extension headers can be used to connect a variety of Xplained Pro extensions to Xplained Pro MCU
boards or to access the pins of the target MCU on Xplained Pro MCU boards directly.
Table 3-4. Xplained Pro Standard Extension Header
Pin number
Name
Description
1
ID
Communication line to the ID chip on an 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 I/O
6
GPIO2
General purpose I/O
7
PWM(+)
Pulse width modulation, alternatively positive part of differential
PWM
8
PWM(-)
Pulse width modulation, alternatively negative part of differential
PWM
9
IRQ/GPIO
Interrupt request line and/or general purpose I/O
10
SPI_SS_B/
GPIO
Slave select for SPI and/or general purpose I/O
11
I2C_SDA
Data line for I2C interface. Always implemented, bus type.
12
I2C_SCL
Clock line for I2C interface. Always implemented, bus type.
13
UART_RX
Receiver line of target device UART
14
UART_TX
Transmitter line of target device UART
15
SPI_SS_A
Slave select for SPI. Should preferably be unique.
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3.6.2.
Pin number
Name
Description
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 Power Header
The power header can be used to connect external power to the SAM B11 Xplained Pro kit. The kit will
automatically detect and switch to any 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 when using the 3.3V pin.
Table 3-5. Xplained Pro Power Header
Pin number
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 supply for the kit)
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4.
Hardware User Guide
4.1.
Connectors
The following sections describes the implementation of the relevant connectors and headers on SAM B11
Xplained Pro and their connection to the ATSAMB11G18A. The tables of connections in the sections also
describes which signals are shared between the headers and on-board functionality.
4.1.1.
Xplained Pro Extension Headers
The SAM B11 Xplained Pro headers EXT1 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 are based on the
standard extension header specified in Table 3-4 Xplained Pro Standard Extension Header on page 10 .
The headers have a pitch of 2.54mm
Table 4-1. Extension Header EXT1
EXT1 pin
SAM B11 Function
pin
Shared functionality
1 [ID]
-
-
Communication line to the ID
chip on an extension board
2 [GND]
-
-
Ground
3 [ADC(+)]
GPIO_M
S1
ADC
4 [ADC(-)]
GPIO_M
S2
ADC
5 [GPIO1]
GPIO4
GPIO
6 [GPIO2]
AO_GPIO GPIO/IRQ
_2
7 [PWM(+)]
-
-
8 [PWM(-)]
-
-
9 [IRQ/GPIO]
AO_GPIO IRQ/GPIO
_0
10 [SPI_SS_B/GPIO] GPIO_5
GPIO
EDBG SPI
Temperature Sensor on page
17
11 [TWI_SDA]
LP_GPIO I²C SDA
_8
EDBG I²C, Temperature Sensor
12 [TWI_SCL]
LP_GPIO I²C SCL
_9
EDBG I²C, Temperature Sensor
13 [USART_RX]
LP_GPIO UART1 RXD
_2
14 [USART_TX]
LP_GPIO UART TXD
_3
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EXT1 pin
SAM B11 Function
pin
Shared functionality
15 [SPI_SS_A]
LP_GPIO SPI_SSN
_12
16 [SPI_MOSI]
LP_GPIO SPI MOSI
_11
EDBG SPI
17 [SPI_MISO]
LP_GPIO SPI MISO
_13
EDBG SPI
18 [SPI_SCK]
LP_GPIO SPI SCK
_10
EDBG SPI
19 [GND]
-
-
Ground
20 [VCC]
-
-
Power for extension board
Table 4-2. Extension Header EXT3
EXT3 pin
SAM B11 Function
pin
Shared functionality
1 [ID]
-
-
Communication line to the ID
chip on an extension board
2 [GND]
-
-
Ground
3 [ADC(+)]
GPIO_M
S3
ADC
4 [ADC(-)]
GPIO_M
S4
ADC
5 [GPIO1]
LP_GPIO GPIO
_20
6 [GPIO2]
-
-
7 [PWM(+)]
-
-
8 [PWM(-)]
-
-
9 [IRQ/GPIO]
AO_GPIO IRQ/GPIO
_1
10 [SPI_SS_B/GPIO] -
EDBG GPIO3
-
11 [TWI_SDA]
LP_GPIO I²C SDA
_14
DEBUG I²C
12 [TWI_SCL]
LP_GPIO I²C SCL
_15
DEBUG I²C
13 [USART_RX]
LP_GPIO UART2 RX
_6
DEBUG UART
14 [USART_TX]
LP_GPIO UART2 TX
_7
DEBUG UART
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4.1.2.
EXT3 pin
SAM B11 Function
pin
Shared functionality
15 [SPI_SS_A]
LP_GPIO SPI1 SSN
_16
16 [SPI_MOSI]
LP_GPIO SPI1 MOSI
_19
17 [SPI_MISO]
LP_GPIO SPI1 MISO
_18
18 [SPI_SCK]
LP_GPIO SPI1 SCK
_17
19 [GND]
-
-
Ground
20 [VCC]
-
-
Power for extension board
VDDIO Header
The SAM B11 Xplained Pro has a 2-pin header connecting the power supply from the VCC_MCU net to
VCC_IO net through a jumper. This header can be used to measure the current to the I/O block of the
SAM B11 device by removing the jumper and connect an ammeter. SAM B11 has the possibility to run the
I/O block at a lower voltage level than the MCU is running and thus support interfacing devices that
require lower operating voltages. The header can then be used to power the VCC_IO pin at a different
voltage level by removing the jumper and connecting a power supply with the desired voltage. Refer to
the datasheet of the device for valid operating voltages.
Table 4-3. VDDIO Header
4.1.3.
VDDIO header pin
Function
1
VCC_MCU power supply
2
VCC_IO power input
Current Measurement Header
An angled 1x2, 100mil pin-header marked with MCU current measurement is located at the upper edge of
the SAM B11 Xplained Pro. All power to the ATSAMB11G18A is routed through this header. To measure
the power consumption of the device remove the jumper and replace it with an ammeter.
Caution: Removing the jumper from the pin-header while the kit is powered may cause the
ATSAMB11G18A to be powered through its I/O pins. This may cause permanent damage to the
device.
4.1.4.
Cortex Debug Connector
®
SAM B11 Xplained Pro has a 10-pin 50-mil Cortex Debug Connector that can be used to attach external
debuggers to the ATSAMB11G18A.
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Table 4-4. Cortex Debug Connector
Cortex Debug
Connector pin
Pin / Net
Function
Shared functionality
1
VCC_TARGET_P3V3
ATSAMB11G18A
voltage
2
GPIO_1
SWD data signal
3
GND
Ground
4
GPIO_2
SWD clock signal
5
GND
Ground
6
-
-
7
-
-
8
-
-
9
GND
Ground
10
RESETN
Target reset signal
EDBG SWD
EDBG SWD
The Target reset is isolated from the Cortex Debug Connector by R300 (0 Ohm link) which is not mounted
by default in the PCBA
4.2.
Peripherals
4.2.1.
Crystals
The SAM B11 Xplained Pro kit contains one mounted 32.768kHz crystal that can be used as clock
sources for the SAM B11. The crystal has cut-straps next to them that can be used to measure the
oscillator safety factor. This is done by cutting the strap and adding a resistor across the strap.
Information about oscillator allowance and safety factor can be found in application note AVR41001,
information about clock calibration and compensation can be found in application note AT03155.
The footprint for the external crystal is based on the Fox FQ5032B series
Table 4-5. External 32.768kHz Crystal
4.2.2.
SAM B11 pin
Function
Shared functionality
RTC_CLKP
XIN32
-
RTC_CLKN
XOUT32
-
Mechanical Buttons
SAM B11 Xplained Pro contains two mechanical buttons. One button is the RESET button connected to
the SAM B11 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.
Note: There is no pull-up resistor connected to the generic user button. Remember to enable the
internal pull-up in the SAM B11 to use the button.
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Table 4-6. Mechanical Buttons
4.2.3.
SAM B11 pin
Silkscreen text
Shared functionality
RESET
RESET
-
GPIO_23
SW0
EDBG GPIO
LED
There is one yellow LED available on the SAM B11 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 4-7. LED Connection
4.2.4.
SAM B11 pin
Function
Shared functionality
GPIO_22
Yellow LED0
EDBG GPIO
Debug I2C and UART
Debug I2C and UART are used for debugging the BLE stack in the SAM B11 boards. Both these headers
are not mounted on the production variant.
Pinout for the Debug I2C:
Table 4-8. Debug I2C Pinout Specification
SAM B11 pin
Function
Shared functionality
I2C SCL
Clock line for I2C
EXT3
GND
Ground
I2C SDA
Data line for I2C
EXT3
NC
Pinout for Debug UART:
Table 4-9. Debug UART Pinout Specification
SAM B11 pin
Function
Shared functionality
UART TXD
UART TX pin
EXT3
UART RXD
UART RX pin
EXT3
GND
4.2.5.
Battery header
The SAM B11 Xplained Pro has a BATTERY HEADER for connecting the battery for use with the SAM
B11 module. The battery header has a VCC and GND pin and disconnects the LDO for the MCU. It is
polarity protected. The batter power supply can be given to the device by placing a jumper over pin 1-2 on
the 3-pin VBAT SELECT header.
By default the jumper is placed over pin 2-3 to select the board power supply. This configuration is
selected to avoid draining the battery and can be used during development.
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Table 4-10. VBAT SELECT Header
4.2.6.
VBAT SELECT pin
Function
1
Power from battery
2
VCC pin of SAM B11 board, powers both MCU and Extensions
3
Power from board supply
Temperature Sensor
The SAM B11 Xplained Pro has an on board temperature sensor AT30TSE758A, powered by the
VCC_TARGET_P3V3 of the board. The temperature sensor is I²C controlled and is available on the
address 0x48 (7bit MSB address)
AT30TSE758A also has a serial EEPROM accessible through I²C
4.3.
SAMB11 pin
Function
Shared functionality
LP_GPIO_8
SDA (Data line)
EXT1, EDBG I²C
LP_GPIO_9
SCL (Clock line)
EXT1, EDBG I²C
LP_GPIO_5
ALERT
EXT1
Embedded Debugger Implementation
SAM B11 Xplained Pro contain an Embedded Debugger (EDBG) that can be used to program and debug
the ATSAMB11G18A 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 I2C and it includes four of
the SAM B11 GPIOs. The kit also includes a XAM extension processor to the Embedded Debugger for
on-board current measurement. 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
6.
Table 4-11. SWD Connections
4.3.2.
SAM B11 pin
Function
Shared functionality
LP_GPIO_0
SWD clock
Table 4-4 Cortex Debug Connector on
page 15
LP_GPIO_1
SWD data
Table 4-4 Cortex Debug Connector on
page 15
Virtual COM Port
The Embedded Debugger acts as a Virtual Com Port gateway by using one of the ATSAMB11G18A
UARTs. For further information on how to use the Virtual COM port, see Embedded Debugger on page 6.
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Table 4-12. Virtual COM Port Connections
4.3.3.
SAM B11 pin
Function
Shared functionality
LP_GPIO_2
UART TXD(SAM B11 TX line)
EXT1
LP_GPIO_3
UART RXD (SAM B11 RX line)
EXT1
Atmel Data Gateway Interface
The Embedded Debugger features an Atmel Data Gateway Interface (DGI) by using either a SPI or I²C.
The DGI can be used to send a variety of data from the ATSAMB11G18A to the host PC. For further
information on how to use the DGI interface, see Atmel Data Visualizer and the EDBG User Guide.
Table 4-13. DGI Interface Connections When Using SPI
SAM B11 pin
Function
Shared functionality
LP_GPIO_7
GPIO/SPI SS (Slave select) ((SAM B11
is Master))
-
LP_GPIO_13
SPI MISO (Master In, Slave Out)
EXT1
LP_GPIO_11
SERCOM5 PAD[2] SPI MOSI (Master
Out, Slave in)
EXT1
LP_GPIO_10
SERCOM5 PAD[3] SPI SCK (Clock Out) EXT1
Table 4-14. DGI Interface Connections When Using I²C
SAM B11 pin
Function
Shared functionality
LP_GPIO_8
SDA (Data line)
EXT1
LP_GPIO_9
SCL (Clock line)
EXT1
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 SAM B11
application code. For further information on how to configure and use the GPIO monitoring features, see
Atmel Data Visualizer and the EDBG User Guide.
Table 4-15. GPIO Lines Connected to the EDBG
4.3.4.
SAM B11 pin
Function
Shared functionality
LP_GPIO_22
GPIO0
USER LED
LP_GPIO_23
GPIO1
USER BUTTON
LP_GPIO_18
GPIO2
EXT3
LP_GPIO_20
GPIO3
SAM B11 Xplained Pro XAM Configuration
On the SAM B11 Xplained Pro the MCU and the MCU peripherals (e.g. extensions) are powered by its
own regulator as show in the following figure. All other parts of the board, mainly embedded debugger
and accompanying Xplained Pro Analog Module (XAM), are powered from a separate regulator. The
current to the MCU and peripherals can be measured by connecting them to the XAM output through
jumper settings.
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Figure 4-1. SAMB11 XAM Implementation Block Diagram
On the SAM B11 Xplained Pro the XAM can be used in four configurations:
1. No current measurement or external MCU current measurement: The XAM is bypassed and
thus the MCU and peripherals are supplied directly by the regulator. Set both jumpers in the
"BYPASS" position. In this configuration it is also possible to connect external measurement tools
on the Xplained Pro MCU power measurement header to measure MCU current directly instead of
using the XAM.
2. MCU current measurement: The XAM measures only the MCU current while the peripherals are
supplied directly by the regulator. For this configurations place the jumper for "I/O" (peripherals) into
the "BYPASS" position and the for "MCU" into the "MEASURE" position.
3. Peripherals measurement: The XAM measures only the peripherals current while the MCU is
directly supplied by the regulator. For this configuration place the jumper for "MCU" into the
"BYPASS" position and the "I/O" jumper into the "MEASURE" position.
4. MCU and peripherals measurement: In this configuration both MCU and peripherals are
measured by the XAM. Place both jumpers on "I/O" and "MCU" headers in the "MEASURE"
position.
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5.
Document Revision History
Doc. rev.
Date
Comment
42664A
02/2016
Initial document release.
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