Discovery Kit For LoRaWAN™ And LPWAN Protocols With STM32L0 B L072Z LRWAN1 User Manual
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UM2115
User manual
Discovery kit for LoRaWAN™ and LPWAN protocols with STM32L0
Introduction
The B-L072Z-LRWAN1 Discovery kit embeds the CMWX1ZZABZ-091 LoRa® module
(Murata). This Discovery kit allows users to develop easily applications with the
STM32L072CZ and the LoRa® RF connectivity in one single module.
The B-L072Z-LRWAN1 Discovery kit has the full set of features available in the STM32L0
Series and offers ultra-low-power and LoRa® RF features. The B-L072Z-LRWAN1
Discovery kit is a low-cost and easy-to-use development kit to quickly evaluate and start a
development with an STM32L072CZ microcontroller.
The B-L072Z-LRWAN1 Discovery kit includes LoRa® RF interface, LEDs, push-buttons,
antenna, Arduino™ Uno V3 connectors, USB 2.0 FS connector in Micro-B format. The
integrated ST-LINK/V2-1 provides an embedded in-circuit debugger and programmer for the
STM32L0 MCUs.
The LoRaWAN™ stack is certified class A and C compliant. It is available inside the
I-CUBE-LRWAN firmware package.
To help users setting up a complete LoRaWAN™ node, the B-L072Z-LRWAN1 Discovery kit
comes with the STM32 comprehensive free software libraries and examples available with
the STM32Cube package, as well as a direct access to the Arm® Mbed Enabled™
resources at the http://mbed.org website.
Figure 1. B-L072Z-LRWAN1 LoRa® Discovery kit
1. Picture is not contractual.
September 2017
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www.st.com
1
Contents
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Contents
1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Product marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Development toolchains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6
Demonstration software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7
Ordering and product information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8
Hardware layout and configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9
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8.1
B-L072Z-LRWAN1 Discovery kit mechanical drawing . . . . . . . . . . . . . . . 12
8.2
Embedded ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.2.1
Drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.2.2
ST-LINK/V2-1 firmware upgrade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.3
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8.4
IDD measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.5
Clock sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.6
Reset sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
8.7
Antenna and RF connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.8
Virtual COM port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.9
Buttons and LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8.10
USB FS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.1
Arduino Uno V3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9.2
B-L072Z-LRWAN1 Discovery kit CN2 and CN3 connectors . . . . . . . . . . 20
9.3
Other connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.3.1
Debug connector SWD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.3.2
SWD Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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Contents
9.3.3
10
External +3.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.4
Description of the jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9.5
Configuration of the solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
B-L072Z-LRWAN1 Discovery kit information . . . . . . . . . . . . . . . . . . . . 27
10.1
Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.2
Board revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10.3
Known limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Appendix A Schematic diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Appendix B Federal Communications Commission (FCC),
Industry Canada (IC) Compliance and other Certifications . . . . . . 35
B.1
FCC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
B.1.1
B.2
B.3
ANSI C63.4 (2014) American National Standard for Methods of
Measurement of Radio-Noise Emissions from Low-Voltage Electrical
and Electronic Equipment in the Range of 9 kHz to 40 GHz . . . . . . . . . 35
IC Compliance Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
B.2.1
Industry Canada Licence-Exempt Radio Apparatus . . . . . . . . . . . . . . . . 35
B.2.2
Radio Frequency (RF) Exposure Compliance of
Radiocommunication Apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Other certifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B.3.1
EN 55032 (2012) / EN 55024 (2010) ETSI EN 301 489-1 (v1.9.2) /
ETSI EN 301 489-3 (v1.6.1) EN 60950-1
(2006+A11/2009+A1/2010+A12/2011+A2/2013) CFR 47,
FCC Part 15,Subpart B (Class B Digital Device) and
Industry Canada ICES-003 (Issue 6/2016). . . . . . . . . . . . . . . . . . . . . . . 36
B.3.2
Electrical Safety qualification for CE marking: EN 60950-1
(2006+A11/2009+A1/2010+A12/2011+A2/2013) IEC 60650-1
(2005+A1/2009+A2/2013) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B.3.3
EMC qualification accordingly to standard CFR 47, FCC Part 15,
Subpart B & Industry Canada ICES-003 (Issue 6/2016)
Class B Digital Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
B.3.4
CE qualification according to standards:
ETSI EN 300 220-1 V2.4.1 (2012) / V3.1.1 (2017) ETSI EN
300 220-2 V2.4.1 (2012) / V3.1.1 (2017) RF Module already
certified – Partial test only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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3
List of tables
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List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
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ON/OFF conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
IDD measurements and solder-bridge settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Assignment of the control ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Arduino Uno V3 connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Connector CN2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connector CN3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Debug connector SWD (CN12) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
External +3.3 V (CN13). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Description of the jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Configuration of the solder bridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
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List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
B-L072Z-LRWAN1 LoRa® Discovery kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B-L072Z-LRWAN1 top layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
B-L072Z-LRWAN1 bottom layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
B-L072Z-LRWAN1 mechanical drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
USB composite device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
RF signal path and connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
B-L072Z-LRWAN1: location of the solder bridges (top view) . . . . . . . . . . . . . . . . . . . . . . . 25
B-L072Z-LRWAN1: location of the solder bridges (bottom view) . . . . . . . . . . . . . . . . . . . . 26
B-L072Z-LRWAN1 Discovery kit, Top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ST-LINK/V2-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
LoRa module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
USB 2.0 FS and antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
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5
Features
1
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Features
The B-L072Z-LRWAN1 Discovery kit offers the following features:
•
CMWX1ZZABZ-091 LoRa® module (Murata)
–
Embedded ultra-low-power STM32L072CZ Series MCUs, based on Arm®Cortex®
-M0+ core, with 192 Kbytes of Flash memory, 20 Kbytes of RAM, 20 Kbytes of
EEPROM
–
USB 2.0 FS
–
4-channel,12-bit ADC, 2xDAC
–
6-bit timers, LP-UART, I2C and SPI
–
Embedded SX1276 transceiver
–
LoRa®, FSK, GFSK, MSK, GMSK and OOK modulations
–
+14 dBm or +20 dBm selectable output power
–
157 dB maximum link budget
–
Programmable bit rate up to 300 Kbit/s
–
High sensitivity: down to -137 dBm
–
Bullet-proof front end: IIP3 = -12.5 dBm
–
89 dB blocking immunity
–
Low RX current of 10 mA, 200 nA register retention
–
Fully integrated synthesizer with a resolution of 61 Hz
–
Built-in bit synchronizer for clock recovery
–
Sync word recognition
–
Preamble detection
–
127 dB+ dynamic range RSSI
•
Including 50 Ohm SMA RF antenna
•
1 user and reset push-buttons
•
Board connectors:
•
–
USB FS connector
–
SMA and U.FL RF
Board expansion connectors:
–
•
6/38
Arduino Uno V3
7 LEDs:
–
4 general-purpose LEDs
–
5 V-power LED
–
ST-LINK-communication LED
–
Fault-power LED
•
Flexible power-supply options: ST-LINK USB VBUS or external sources
•
On-board ST-LINK/V2-1 debugger/programmer with USB re-enumeration capability:
mass storage, virtual COM port and debug port
•
Comprehensive free software libraries and examples available with the STM32Cube
package
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2
Product marking
•
Support of a wide choice of Integrated Development Environments (IDES) including
IAR™, Keil®, GCC-based IDEs, Arm® Mbed
•
Arm® Mbed Enabled™ compliant
Product marking
Evaluation tools marked as "ES" or "E" are not yet qualified and are therefore not ready to
be used as reference designs or in production. Any consequences arising from such usage
will not be at ST’s charge. In no event will ST be liable for any customer usage of these
engineering sample tools as reference designs or in production.
"E" or "ES" marking examples of location:
3
•
On the targeted microcontroller that is soldered on the board (for illustration of
microcontroller marking, refer to the section "Package information" of the
microcontroller datasheet at www.st.com).
•
Next to the evaluation tool ordering part number, that is stuck or silkscreen printed on
the board
Conventions
Table 1 provides the definition of some conventions used in the present document.
Table 1. ON/OFF conventions
4
Convention
Definition
Jumper JPx ON
Jumper fitted
Jumper JPx OFF
Jumper not fitted
Solder bridge SBx ON
SBx connections closed by solder
Solder bridge SBx OFF
SBx connections left open
System requirements
•
Windows® OS (7, 8 and 10), Linux® 64-bit or macOS™
•
USB Type-A to Micro-B cable
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Development toolchains
5
6
UM2115
Development toolchains
•
Keil® MDK-ARM(a)
•
IAR™ EWARM(a)
•
GCC-based IDEs including free SW4STM32 from AC6
•
Arm® Mbed Enabled™ online (see http://mbed.org)
Demonstration software
The demonstration software, included in the STM32Cube package, is preloaded in the
STM32 Flash memory for easy demonstration of the device peripherals in standalone mode.
The latest versions of the demonstration source code and associated documentation can be
downloaded from the www.st.com/i-cube-lrwan webpage.
7
Ordering and product information
Before installing and using the product, accept the Evaluation Product License Agreement
at the www.st.com/stm32app-discovery webpage.
For more information on the STM32L072 Discovery kit visit the www.st.com/stm32appdiscovery webpage.
To order the B-L072Z-LRWAN1 Discovery kit refer to Table 2.
Table 2. Ordering information
a. On Windows
8/38
®
RPN
Target STM32
B-L072Z-LRWAN1
STM32L072CZ
only.
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Hardware layout and configuration
The B-L072Z-LRWAN1 Discovery kit has been designed around the Murata LoRa® module
including the STM32L072CZ microcontroller in a 49-pin WLCSP package.
Figure 2 illustrates the connection between the Murata LoRa® module and the peripherals
(ST-LINK/V2, RF Antenna, LEDs, push-buttons, USB 2.0 FS Micro-B connector, 3xAAA
battery holder).
Figure 3 and Figure 4 help users to locate these features on the STM32L072 Discovery kit.
Figure 2. Hardware block diagram
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Hardware layout and configuration
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Hardware layout and configuration
UM2115
Figure 3. B-L072Z-LRWAN1 top layout
Micro-B ST-LINK USB
connector
SWD connector
ST-LINK COM LED
User push-button
RESET push-button
External +3.3V
power supply
Arduino Uno V3
connectors
Arduino Uno V3
connectors
User LEDs
Micro-B USB 2.0 FS
user connector
LoRa module
CMWX1ZZABZ-091
with STM32L072CZY6
U.FL connector (option)
RF SMA connector
10/38
On-board Antenna matching
designed filter
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Hardware layout and configuration
Figure 4. B-L072Z-LRWAN1 bottom layout
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Hardware layout and configuration
8.1
UM2115
B-L072Z-LRWAN1 Discovery kit mechanical drawing
Figure 5. B-L072Z-LRWAN1 mechanical drawing
1. Plastic spacer height = 14 mm, overall height = 22 mm +/- 1 mm.
2. The overall dimensions of the B-L072Z-LRWAN1 is 106 x 65,07 mm including antenna and USB
connectors.
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8.2
Hardware layout and configuration
Embedded ST-LINK/V2-1
The ST-LINK/V2-1 programming and debugging tool is integrated on the B-L072Z-LRWAN1
Discovery kit. Compared to ST-LINK/V2 the changes are listed below.
The new features supported on ST-LINK/V2-1 are:
•
USB software re-enumeration
•
Virtual COM port interface on USB
•
Mass storage interface on USB
•
USB power management request for more than 100mA power on USB
These features are no more supported on ST-LINK/V2-1:
•
SWIM interface
•
Application voltage lower than 3 V
For general information concerning the debugging and programming features that are
common to both versions V2 and V2-1, refer to ST-LINK/V2 in-circuit debugger/programmer
for STM8 and STM32 User manual (UM1075).
8.2.1
Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows® 7, 8 and 10 is
available at the www.st.com website.
In case the B-L072Z-LRWAN1 Discovery kit is connected to the PC before the driver is
installed, some B-L072Z-LRWAN1 interfaces may be declared as "unknown" in the PC
device manager. In this case the user must install the driver files and update the driver of the
connected device from the device manager.
Note:
Prefer using the "USB Composite Device" handle for a full recovery.
Figure 6. USB composite device
8.2.2
ST-LINK/V2-1 firmware upgrade
The ST-LINK/V2-1 embeds a firmware upgrade mechanism for in-situ upgrade through the
USB port. As the firmware may evolve during the life time of the ST-LINK/V2-1 product (for
example new functionalities, bug fixes, support for new microcontroller families), it is
recommended to visit the www.st.com website before starting to use the B-L072Z-LRWAN1
Discovery kit and periodically, to stay up-to-date with the latest firmware version.
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Hardware layout and configuration
8.3
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Power supply
The B-L072Z-LRWAN1 Discovery kit is designed to be powered in various ways. It can be
simply plugged on a USB PC port with a Micro-B USB cable. In this mode, the board is
programmed and debugged via the ST-LINK/V2-1 USB port on CN7. It is possible to use
one of the different following sources:
•
External +3.3 V connected to CN13 (+3.3 V and GND pins of CN13 must be
connected).
•
7-12 V DC power supply plugged on Arduino™ Uno V3 connectors: VIN on pin 8 and
GND on pin 7 of CN4 (VIN and GND pins must be both connected)
•
USB 2.0 FS Micro-B on CN11 connector (Device mode). The power supply is provided
by the USB port connected to CN11.
•
On-board 3xAAA-sized battery holder BT1 located on the bottom side of the Discovery
kit (batteries are not delivered inside the Discovery kit package). Respect the battery
polarities mentioned in the battery case.
•
5V_ST_LINK DC power with limitation from ST-LINK USB connector. The USB type
Micro-B connector CN7 of ST-LINK/V2-1. If the USB enumeration succeeds (as
explained below), the ST-LINK 5 V link power is enabled, by asserting the PWR_ENn
signal. This pin is connected to a power switch ST890, which powers the board. This
power switch features also a current limitation to protect the PC in case of a shortcircuit on board (more than 625mA). The Discovery kit can be powered from the STLINK USB connector, but only the ST-LINK circuit has the power before USB
enumeration, because the host PC only provides 100 mA to the board at that time.
During the USB enumeration, the Discovery kit requires 300 mA power from the host
PC. If the host is able to provide the required power, the enumeration finishes by a
"SetConfiguration" command and then, the power transistor ST890 is switched ON, the
red LED LD7 is turned ON, thus the Discovery kit can consume maximum 300 mA
current, but no more. If the host is not able to provide the requested current, the
enumeration fails. Therefore the ST890 remains OFF and the STM32 part including the
extension board is not powered. As a consequence the red LED LD7 remains turned
OFF. In this case it is mandatory to use an external power supply.
To further decrease the current consumption of the board, the LED7 must be disconnected
by opening SB18.
Users do not have to manage the different configurations with jumpers or switches. The
power supplies are internally managed by a set of diodes on the respective power supply
branches.
If the board is supplied by CN13, by battery or by CN11, SB37 must be removed to release
the RESET pin managed by ST-LINK. In that case the ST-LINK is no more powered.
The red LED LD7 (+5 V power supply) is turned on (with SB18 ON) as soon as one of the
power sources listed above is present.
Note:
14/38
The Discovery kit must be powered by a power supply unit or by an auxiliary equipment
complying with the standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low
Voltage (SELV) with limited power capability.
DocID029802 Rev 2
UM2115
8.4
Hardware layout and configuration
IDD measurements
The B-L072Z-LRWAN1 Discovery kit power consumption is measured by mean of three
connectors (not fitted initially) JP1, JP2 and JP3. These three connectors are respectively
connected to the power-supply inputs VDD_RF_LRA, VDD_USB_LRA and
VDD_MCU_LRA of the LoRa® module. The purpose is to monitor separately the different
power consumptions by branches which are divided in three sections: RF, USB and MCU.
To be able to insert a multimeter in each branch where the measurements must take place,
users have to remove the associated solder bridge that initially shortcut the JPx connectors
in the default configuration.
The Table 3 below summarizes the possible configurations:
Table 3. IDD measurements and solder-bridge settings
Jumper name
JP1 VDD_RF_LRA
JP2 VDD_USB_LRA
JP3 VDD_MCU_LRA
8.5
Status
IDD Measurement
SB17 ON (default)
N/A
SB17 OFF
IDD VDD_RF_LRA
SB19 ON (default)
N/A
SB19 OFF
IDD VDD_USB_LRA
SB14 ON (default)
N/A
SB14 OFF
IDD VDD_MCU_LRA
Clock sources
The Murata LoRa® module embeds its own TCXO running at 32 MHz when enabled.
The TCXO is either controlled by the STM32 pin PA12 (when pin 1 of JP9 is connected to
pin 2 of JP9) or always enabled (when pin 2 of JP9 is connected to pin 3 of JP9). For the
description of the jumpers refer to Table 10.
When an accurate external-high-speed clock is needed by the STM32, the TCXO_OUT
clock pin is supplied by the module pin PH0_OSC_IN by closing SB13.
The B-L072Z-LRWAN1 Discovery kit can be equipped, if needed, with an external crystal
oscillator. An 8 MHz oscillator with 20 pF capacitors can be added on the board (X1, C1 and
C2 are not fitted by default) for user needs.
8.6
Reset sources
The reset signal of the B-L072Z-LRWAN1 Discovery kit is active low and the reset sources
is one of the following:
•
Reset button B2
•
Arduino Uno V3 shield board from CN4
•
LoRa® module internal reset coming either from STSAFE security IC or STM32L072CZ
(selectable by jumper JP10)
•
Embedded ST-LINK/V2-1
DocID029802 Rev 2
15/38
37
Hardware layout and configuration
8.7
UM2115
Antenna and RF connection
The B-L072Z-LRWAN1 Discovery kit includes a stubby straight 900 MHz 50 ohm antenna
that must be connected to the SMA connector CN10 for any RF communication purpose.
There are two paths designed for RF signal (the blue arrow in the Figure 7), the default path
is connected to the SMA connector output (the red arrow in the Figure 7) and the second
one is U.FL CN9 connector (the green arrow in the Figure 7). Each RF signal path includes
an antenna matching circuitry that can be mounted and adjusted by advanced users.
Initially, the default path connects the LoRa® module RF signal to the SMA connector
through 0 Ohm resistors that are fitted at the location of C14 and C15. Notice that C13 and
C14, as shown below in Figure 7, have a common pad on layout from antenna circuitry. If
the users want to connect the U.FL connector instead of the SMA, they need to redirect the
RF signal through C13 and then rotate the component on the expected footprint.
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Figure 7. RF signal path and connectors
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8.8
Virtual COM port
The serial interface USART2 is directly available as a virtual COM port of the PC, connected
to the ST-LINK/V2-1 USB connector CN7. For configuration details refer to “STM32 LoRa®
software expansion for STM32Cube” User manual (UM2073).
8.9
Buttons and LEDs
The black button B2 located at the top side of the Discovery kit, is the reset of the
microcontroller STM32L072CZ.
16/38
DocID029802 Rev 2
UM2115
Hardware layout and configuration
The blue button B1 located at the top side is available to be used as a digital input or as a
wakeup-alternate function. When the button is depressed the logic state is 1, otherwise the
logic state is 0.
By default the user button is connected to PB2, it can also be connected to PA0 as wakeup
source. In this case, SB31 must be removed and SB30 must be fitted.
Seven LEDs located at the top side are available, four of which are general purpose LEDs
for user needs. To light a LED write a high-logic state 1 in the corresponding GPIO register.
Table 4 shows the assignment of the control ports to the LED indicators.
Table 4. Assignment of the control ports
8.10
Reference
Color
Name
Comment/function
B1
Blue
USER
Alternate function wakeup
B2
Black
RESET
Microcontroller reset
LD1
Green
GP
User defined
LD2
Green
GP
User defined
LD3
Blue
GP
User defined
LD4
Red
GP
User defined
LD5
Red/Green
LD6
Red
Fault power
LD7
Red
5 V Power
ST-LINK COM Green when communication
Current upper than 625mA
5 V present
USB FS
The B-L072Z-LRWAN1 board supports USB FS 2.0 communication via a USB Micro-B
connector. VBUS is powered by another USB host when B-L072Z-LRWAN1 board works as
a USB device.
Note:
When the B-L072Z-LRWAN1 board is powered by an external power supply through USB
FS connector (CN11), in device mode, do not use a PC as power source if the current
consumption is greater than 100 mA, otherwise the PC can be damaged.
DocID029802 Rev 2
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37
Connectors
UM2115
9
Connectors
9.1
Arduino Uno V3 connectors
Table 5. Arduino Uno V3 connectors
Connector
CN1
CN4
CN5
18/38
Pin
Pin name
STM32 Pin
Function
10
D15
PB8
I2C1_SCL
9
D14
PB9
I2C1_SDA
8
AVDD
VREF+
VREF+
7
GND
GND
Ground
6
D13
PA5 or PB13
SPI1_SCK or
SPI2_SCK
5
D12
PB14
SPI2_MISO
4
D11
PB15
SPI2_MOSI
3
D10
PB6
LPTIM1_ETR
2
D9
PB12
SPI2_NSS
1
D8
PA9
USART1_TX
1
NC
-
-
2
IOREF
-
+3.3 V Ref
3
RESET
NRST
MCU_nRST
4
+3.3 V
-
+3.3 V
input/output
5
+5 V
-
5 V output
6
GND
-
Ground
7
GND
-
Ground
8
VIN
-
Power input
8
D7
PA8
MCO
7
D6
PB2
LPTIM1_OUT
6
D5
PB7
LPTIM1_IN2
5
D4
PB5
LPTIM1_IN1
4
D3
PB13 or NC
TIM21_CH1 or NC
3
D2
PA10
USART1_RX
2
D1
PA2
USART2_TX
1
D0
PA3
USART2_RX
DocID029802 Rev 2
UM2115
Connectors
Table 5. Arduino Uno V3 connectors (continued)
Connector
CN6
Pin
Pin name
STM32 Pin
Function
1
A0
PA0
ADC_IN0
2
A1
NC or PA0
NC or ADC_IN0
3
A2
PA4
ADC_IN4
4
A3
NC or PA4
NC or ADC_IN4
5
A4
PH1 or PB9
OSC_IN or
I2C1_SDA
6
A5
PH0 or PB8
OSC_OUT or
I2C1_SCL
DocID029802 Rev 2
19/38
37
Connectors
9.2
UM2115
B-L072Z-LRWAN1 Discovery kit CN2 and CN3 connectors
Table 6. Connector CN2
Connector
CN2
20/38
Pin
Pin name
STM32 Pin
Function
®
1
TCXO_VCC
-
LoRa module TCXO power
2
VDD_MCU_LRA
-
MCU section power supply
3
GND
-
Ground
4
VDD_RF_LRA
-
MCU section power supply
5
GND
-
Ground
6
VDD_USB_LRA
-
MCU section power supply
7
GND
-
Ground
8
BOOT0
BOOT0
BOOT0
9
PA13
PA13
SWDIO
10
PA14
PA14
SWCLK
®
11
SX1276_DIO0
-
LoRa module debug pin
12
SX1276_DIO1
-
LoRa® module debug pin
13
SX1276_DIO2
-
LoRa® module debug pin
14
SX1276_DIO3
-
LoRa® module debug pin
15
SX1276_DIO4
-
LoRa® module debug pin
16
SX1276_DIO5
-
LoRa® module debug pin
17
GND
-
Ground
18
MCU_nRST
NRST
RESET
19
+3.3 V
-
+3.3 V power supply input/output
20
+5 V
-
+5 V power supply input
21
VIN
-
VIN power supply input (7-12Vdc)
22
GND
-
Ground
23
PA0
PA0
ADC_IN0
24
PA4
PA4
ADC_IN4
25
PH1
PH1
OSC_OUT
26
PH0
PH0
OSC_IN
DocID029802 Rev 2
UM2115
Connectors
Table 7. Connector CN3
Connector
CN3
Pin
Pin name
STM32 Pin
Function
1
CRF1
PA1
LoRa® module dedicated pin
2
CRF2
PC2
LoRa® module dedicated pin
3
CRF3
PC1
LoRa® module dedicated pin
4
STSAFE_nRST
-
STSAFE security IC reset pin
5
AVDD
VREF+
VREF+
6
GND
-
Ground
7
PA5
PA5
ADC_IN5
8
PB13
PB13
SPI2_SCK
9
PB14
PB14
SPI2_MISO
10
PB15
PB15
SPI2_MOSI
11
PB6
PB6
LPTIM1_ETR
12
GND
-
Ground
13
PA9
PA9
USART1_TX
14
PA12
PA12
USB_DP
15
PA11
PA11
USB_DM
16
PB12
PB12
SPI2_NSS
17
PB2
PB2
LPTIM1_OUT
18
PA8
PA8
MCO
19
PB7
PB7
LPTIM1_IN2
20
PB5
PB5
LPTIM1_IN1
21
PA10
PA10
USART1_RX
22
PA2
PA2
ADC_IN2
23
PA3
PA3
ADC_IN3
24
PB9
PB9
I2C1_SDA
25
PB8
PB8
I2C1_SCL
26
GND
-
Ground
DocID029802 Rev 2
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37
Connectors
UM2115
9.3
Other connectors
9.3.1
Debug connector SWD
Table 8. Debug connector SWD (CN12)
Connector
CN12
9.3.2
Pin
Pin name
Function
1
VDD_TARGET
VDD from application
2
SWCLK
SWD clock
3
GND
Ground
4
SWDIO
SWD data input/output
5
NRST
RESET of target MCU
6
SWO
Reserved
SWD Interface
It is very easy to use ST-LINK/V2-1 to program an STM32 microcontroller on an external
application. Simply remove the two jumpers from CN8 and connect the application to the
CN12 debug connector according to Table 8.
9.3.3
External +3.3 V
Table 9. External +3.3 V (CN13)
Connector
CN13
Pin
Pin name
Function
1
+3.3 V external
External +3.3 V power supply input
2
GND
Ground
Caution:
When using the external +3.3 V power supply input, SB6 must be OFF.
9.4
Description of the jumpers
Table 10. Description of the jumpers
22/38
Jumper
Pin
number
Designation
Default
state
JP1
2
VDD_RF_LRA
OFF
Allows IDD VDD_RF_LRA measurement
JP2
2
VDD_USB_LRA
OFF
Allows IDD VDD_USB_LRA measurement
JP3
2
VDD_MCU_LRA
OFF
Allows IDD VDD_MCU_LRA measurement
JP5
2
USB charger
OFF
USB charger
JP7,
JP8
2
GND
ON
Ground
JP6
2
ST-LINK TX/RX
OFF
ST-LINK TX/RX signals
Function
DocID029802 Rev 2
UM2115
Connectors
Table 10. Description of the jumpers (continued)
9.5
Jumper
Pin
number
Designation
Default
state
JP9
3
TCXO selection
2-3
Selection TCXO to VDD or external TCXO
power
JP10
3
Reset source
selection
1-2
Reset source selection between STSAFE or
PA11
Function
Configuration of the solder bridges
Refer to Figure 8 and Figure 9 to locate the solder bridges.
Table 11. Configuration of the solder bridges
Solder
bridges
Designation
Default
state
SB19
Short VDD_USB_LRA
ON
Short VDD_USB_LRA connection
SB14
Short VDD_MCU_LRA
ON
Short VDD_MCU_LRA connection
SB17
Short VDD_RF_LRA
ON
Short VDD_RF_LRA connection
SB20
Short D4
OFF
D4 bypass
SB4
Short D6
OFF
D6 bypass
SB5
Short D7
OFF
D7 bypass
SB18
+5 V LED
ON
+5 V power supply ON
SB6
+3.3 V regulator output
ON
Used to disconnect internal +3.3 V regulator when
external source applied on External 3.3 V pin
SB38,SB40,
SB22, SB24
ST-LINK default
ON
Reserved
SB39,
SB41,
SB23, SB25
ST-LINK reserved
OFF
Reserved
SB37
ST-LINK RESET
ON
Connection between ST-LINK reset signal and
LoRa® module reset
SB36
ST-LINK MCO
OFF
Optional ST-LINK MCO redirected to LoRa®
module input clock OSC_IN
SB6
ST-LINK +5 V power
ON
Optional ST-LINK regulator disconnected from +5 V
SB21
ST-LINK force RESET
OFF
Reserved
SB26
PA5 to DIO4
OFF
Reserved to LoRa® module debug
SB27
PA4 to DIO5
OFF
Reserved to LoRa® module debug
SB28
ST-LINK TX
ON
Virtual COM port TX
SB29
ST-LINK RX
ON
Virtual COM port RX
SB15
LRA_USB_DP
OFF
Optional USB_DP connection
SB16
LRA_USB_DM
OFF
Optional USB_DM connection
Function
DocID029802 Rev 2
23/38
37
Connectors
UM2115
Table 11. Configuration of the solder bridges (continued)
24/38
Solder
bridges
Designation
Default
state
SB13
TCXO_OUT to
OSC_IN
OFF
Allows connection of TXCO output to
STM32L072CZY6 OSC_IN input
SB31
USER button PB2
ON
User push-button connected to PB2
SB30
USER button PA0
OFF
User push-button connected to PA0
SB32
LED LD1
ON
LD1 ON
SB33
LED LD3
ON
LD3 ON
SB35
LED LD4
ON
LD4 ON
SB34
LED LD2
ON
LD2 ON
SB10
PH1 Arduino
OFF
Connection A5(CN6) Arduino to PH1
SB3
PA5 Arduino
ON
Connection D13(CN1) Arduino to PA5
SB9
PB13 Arduino
ON
Connection D3(CN5) Arduino to PB13
SB2
PB13 Arduino
OFF
Connection D13(CN5) Arduino to PB13
SB7
PA0 alias Arduino
OFF
Connection A1(CN6) Arduino to PA0
SB8
PA4 alias Arduino
OFF
Connection A3(CN6) Arduino to PA4
SB11
PB9 Arduino
OFF
Connection A4(CN6) Arduino to PB9
SB12
PB8 Arduino
OFF
Connection A54(CN6) Arduino to PB8
SB1
PH0 Arduino
OFF
Connection A4(CN6) Arduino to PH0
Function
DocID029802 Rev 2
UM2115
Connectors
Figure 8. B-L072Z-LRWAN1: location of the solder bridges (top view)
DocID029802 Rev 2
25/38
37
Connectors
UM2115
Figure 9. B-L072Z-LRWAN1: location of the solder bridges (bottom view)
26/38
DocID029802 Rev 2
UM2115
B-L072Z-LRWAN1 Discovery kit information
10
B-L072Z-LRWAN1 Discovery kit information
10.1
Identification
The sticker located on the bottom side of the PCB board shows the information about
the B-L072Z-LRWAN1 Discovery kit identification such as board reference, revision and
serial number. The format of the identification is the following:
10.2
•
MBxxxx p-bb:
the board reference is MB1296, “p” corresponds to the PCB revision and “bb” to the
BOM revision: for example A-01.
•
yywwnnnnn:
"yy" are the two last digits of the manufacturing year, "ww" identifies the manufacturing
week and "nnnnn" is the board serial number.
Board revision history
Revision C-01
The revision C-01 of the B-L072Z-LRWAN1 Discovery kit is the initial released version.
Revision D-01
The revision D-01 of the B-L072Z-LRWAN1 Discovery removes the limitations of the
revision C-01.
10.3
Known limitations
Revision C-01
The power current consumption on VDD_MCU_LRA and on VDD_USB_LRA cannot be
measured as independent branches.To measure the total power consumption including the
MCU LRA and the USB LRA currents, both SB14 and SB19 must be removed. A multimeter
can be placed indifferently where JP2 or JP3 connectors are located. No workaround is
available.
Revision D-01
No limitations. All VDD_MCU_LRA, VDD_USB_LRA, VDD_RF_LRA branches can be
measured separately.
DocID029802 Rev 2
27/38
37
Schematic diagrams
Appendix A
UM2115
Schematic diagrams
This section provides design schematics for the B-L072Z-LRWAN1 Discovery kit features:
28/38
•
Top view of the Discovery kit, see Figure 10
•
Internal/External Power Supply section, see Figure 11
•
Embedded ST-LINK/V2-1, see Figure 12
•
LoRa module connections, see Figure 13
•
USB 2.0 FS antenna and miscellaneous features, see Figure 14
•
Arduino Uno V3 extension connectors and headers, see Figure 15
DocID029802 Rev 2
MB1296-Connectors
MB1296-Connectors.SchDoc
PA[0..15]
PB[0..15]
PC[0..15]
PH[0..1]
SX1276_DIO[0..5]
CRF[1..3]
STSAFE_nRST
MCU_nRST
TCXO_VCC
BOOT0
UM2115
Figure 10. B-L072Z-LRWAN1 Discovery kit, Top view
MB1296-LRA_Module
MB1296-LRA_Module.SchDoc
PA[0..15]
PB[0..15]
PC[0..15]
PH[0..1]
SX1276_DIO[0..5]
CRF[1..3]
STSAFE_nRST
MCU_nRST
TCXO_VCC
BOOT0
MB1296-USB_Antenna
MB1296-USB_Antenna.SchDoc
DocID029802 Rev 2
ANT
MCU_nRST
LRA_USB_P
LRA_USB_N
ANT
LRA_USB_P
LRA_USB_N
PA[0..15]
PB[0..15]
MB1296-Power
MB1296-Power.SchDoc
MB1296-STLINK
MB1296-STLINK.SchDoc
PWR_ENn
PWR_ENn
STLINK_TX
STLINK_RX
MCO
MCU_nRST
SWDIO
SWCLK
STLINK_TX
STLINK_RX
MCO
SWDIO
SWCLK
Title: Top
Project: STM32 LoRa Discovery
Reference: MB1296
Date: 25/01/2017
Revision: D-01
Sheet: 1 of 6
29/38
Schematic diagrams
Size: A4
Schematic diagrams
30/38
Figure 11. Power
Internal/External Power Supply Selection
External 3V3
CN13
IDD jumpers
1
2
+3V3
SB19
Fitted
VDD_USB_LRA
VDD_USB_LRA
JP2
Not Fitted
SB14
Fitted
VDD_MCU_LRA
VDD_MCU_LRA
JP3
Not Fitted
SB17
Fitted
VDD_RF_LRA
VDD_RF_LRA
JP1
Not Fitted
GND
L5
BLM15HG102SN1D
Power Section
Not Fitted
SB20
D4
USB_LRA_5V
STPS2L30A
BT1
Not Fitted
SB4
D5
STPS2L30A
STPS2L30A
LD39050PU33R
U7
Not Fitted
Fitted
SB18
SB5
U5V
D7
USB_CHARGER
JP5
Fitted
C21
C20 STPS2L30A
100nF
4.7uF(25V)
R39
1K
1
2
LD6
A
K
8
IN
IN
FAULT
OUT
OUT
SET
6
7
5
Red
PWR_ENn
3
ON
GND
ST890CDR
Power Switch to supply +5V
from STLINK USB
4
1
C38
C40
100nF
VI
PG
EN
VO
NC
+3V3
3
4
5
Fitted
C39
SB6
C19
100nF
A
U8
K
R38
10K
R37
1K_5%_0603
1uF_X5R_0603
6
1uF_X5R_0603
+5V
GND
C37
10uF(25V)
GND
10uF(25V)
1
C36
3 x AAA Battery Holder
D6
U2 LD1117S50TR
2
Vin
Vout
0
DocID029802 Rev 2
3
2
VIN_REG_5V
VIN
LD7
Red
R24
2K2
Ilim = 625mA
1.2Ilim = 750mA < Isc
1.5Ilim = 938mA > Isc
Title: Power
Project: STM32 LoRa Discovery
Size: A4
Reference: MB1296
Date: 25/01/2017
Revision: D-01
Sheet: 2 of 6
UM2115
R14
4K7
R17
10K
ST-LINK
SWD Interface
48
47
46
45
44
43
42
41
40
39
38
37
8MHz(12pF)
OSC_IN
OSC_OUT
STM_RST
C25
+3V3_ST_LINK
100nF
+3V3
R26
4K7
R27
4K7
AIN_1
JP6
STLK_RX
STLINK_RX
VDD_3
VSS_3
PB9
PB8
BOOT0
PB7
PB6
PB5
PB4/JNTRST
PB3/JTDO
PA15/JTDI
JTCK/SWCLK
36
35
34
33
32
31
30
29
28
27
26
25
+3V3_ST_LINK
STM_JTMS
USB_STLK _P
USB_STLK _N
T_SWO
LED_STLINK
R25 100
Header 6X1
C24
100nF
SB36
AIN_1
SB38
SB39
SB40
SB41
SB22
SB23
SB24
SB25
T_JTCK
R21 22
T_JTMS
R22 22
T_NRST
R23 22
T_SWO
MCO
Not fitted
T_JTMS
T_JTCK
+3V3_ST_LINK
STM_JTCK
SWCLK
STM_JTMS
SWDIO
MCO
PWR_ENn
CN8
Jumpers ON --> Board Selected
Jumpers OFF --> ST-LINK Selected
R28
100
+3V3_ST_LINK
T_SWDIO_IN
C26
100nF
13
14
15
16
17
18
19
20
21
22
23
24
STLINK_TX
TX
RX
VDD_2
VSS_2
JTMS/SWDIO
PA12
PA11
PA10
PA9
PA8
PB15
PB14
PB13
PB12
T_JTCK
C27
100nF
C28
100nF
C29
100nF
LD5
COM
+3V3_ST_LINK
R29
Red
2
1
100
Wired on Bottom Side
R30
LED_STLINK
4 R31
3
0
100
JP7
+3V3_ST_LINK
_Green
D3
LD_BICOLOR_CMS
U5V
U4 LD3985M33R
1
VIN_REG_5V
U5V
BAT60JFILM
i
Diff Pair 90ohm
6
I/O1 I/O1
5
GND Vbus
4
I/O2 I/O2
3
U5V
+3V3_ST_LINK
INH
GND
2
C30
BYPASS
C32
100nF
+3V3_ST_LINK
5
C31
C33
10nF_X7R_0603
C34
100nF
U5
1
2
3
U5V
USBLC6-2SC6
C35
100nF
R33
1K5
R34
10K
3
6
7
8
9
10
11
R32
100K
USB_STLK _N
USB_STLK _P
T1
9013
2
USB_Micro-B receptacle
Shield
Shield
Shield
Shield
EXP
EXP
1
2
3
4
5
Vout
1
R36
36K
R35
USB_RENUMn
100
Title: STLINK/V2-1
Project: STM32 LoRa Discovery
Size: A4
Reference: MB1296
Date: 25/01/2017
Revision: D-01
Sheet: 3 of 6
31/38
Schematic diagrams
1050170001
VBUS
DM
DP
ID
GND
1uF_X5R_0603
Diff Pair 90ohm
i
CN7
Vin
1uF_X5R_0603
USB ST-LINK
PWR
BAT60JFILM
D8
JP8
4
DocID029802 Rev 2
STLK_TX
SB21
VBAT
PC13
PC14
PC15
OSCIN
OSCOUT
NRST
VSSA
VDDA
PA0
PA1
PA2
T_NRST
Not Fitted
1
2
3
4
5
6
7
8
9
10
11
12
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2/BOOT1
PB10
PB11
VSS_1
VDD_1
20 pF
C23
R20 22
1
2
3
4
5
6
U3
STM32F103CBT6
Not fitted
R19
100
BAT60JFILM
CN12
+3V3_ST_LINK
20 pF
C22
X2
1
2
D1
RESERVED
SB37
100K
R18 Not fitted
10K
SWCLK
SWDIO
MCU_nRST
T_NRST
PWR_EXT
10K
Board Ident: PC13=0
SWD
TCK/SWCLK
TMS/SWDIO
1
2
3
4
R7
R13
2K7
BAT60JFILM JP4
+3V3_ST_LINK
R16
USB_RENUMn
STM_JTCK
+5V
DEFAULT
D2
POWER EXT
UM2115
Figure 12. ST-LINK/V2-1
C1, C2, X1, R3, R4, SB13 and SB14 must be placed the closest as possible from U1
PA[0..15]
Not fitted
TCXO_OUT
1
2
3
TCXO Selection
JP9
VDD_RF_LRA
20 pF
C1
X1
1
2
20 pF
C2
Not fitted
0R_0603
VDD_MCU_LRA
PH[0..1]
100K
PH0 /OSC_IN
PH1 /OSC_OUT
PA14/SWCLK
PA13/SWDIO
PB5 /LPTIM1_IN1
PB6 /LPTIM1_ETR
PB7 /LPTIM1_IN2
PB2 /LPTIM1_OUT
R4
DocID029802 Rev 2
VDD_USB_LRA
VDD_MCU_LRA
VDD_RF_LRA
48
47
46
45
44
43
42
41
40
39
38
37
SX1276_DIO[0..5]
CRF[1..3]
PB[0..15]
PC[0..15]
PH[0..1]
SX1276_DIO[0..5]
CRF[1..3]
SWCLK
SWDIO
BOOT0
BOOT0
U1
LRA Module ES0
RESET source selection
JP10
PB9/I2C1_SDA
PB8/I2C1_SCL
MCU_nRST
PA0/WKUP1
VREF+
STSAFE_nRST
DBG_CRF2
DBG_CRF3
DBG_CRF1
GND
ANT
GND
36
35
34
33
32
31
30
29
28
27
26
25
PB9 /I2C1_SDA
PB8 /I2C1_SCL
MCU_nRST
PA0
VDD_MCU_LRA
STSAFE_nRST
CRF2
CRF3
CRF1
ANT
PA11/USB_DM
STSAFE_nRST
MCU_nRST
ANT
Decoupling capacitors
VDD_MCU_LRA
LoRa Module (Murata)
Not fitted
C3
1uF
PB15/SPI2_MOSI
PB14/SPI2_MISO
PB13/SPI2_SCK
PB12/SPI2_NSS
PA10/USART1_RX
PA9 /USART1_TX
PA[0..15]
1
2
3
GND
GND
GND
GND
GND
PA12/USB_DP
PA11/USB_DM
GND
VDD_USB
VDD_MCU
VDD_RF
GND
DBG_SX1276_DIO2
DBG_SX1276_DIO3
SX1276_DIO4
DBG_SX1276_DIO5
DBG_SX1276_DIO1
13
14
15
16
17
18
19
20
21
22
23
24
SX1276_DIO2
SX1276_DIO3
SX1276_DIO4
SX1276_DIO5
SX1276_DIO1
SX1276_DIO0
1
2
3
4
5
6
7
8
9
10
11
12
TCXO_VCC
TCXO_OUT
PH0-OSC_IN
PH1-OSC_OUT
GND
BOOT0
PA14/SWCLK
PA13/SWDIO
PB5/LPTIM1_IN1
PB6/LPTIM1_ETR
PB7/LPTIM1_IN2
PB2/LPTIM1_OUT
PA12/USB_DP
PA11/USB_DM
DBG_SX1276_DIO0
PB15/SPI2_MOSI
PB14/SPI2_MISO
PB13/SPI2_SCK
PB12/SPI2_NSS
PA10/USART1_RX
PA9/USART1_TX
PA8/MCO
PA5/ADC5/DAC2
PA4/ADC4/DAC1
PA3/ADC3
PA2/ADC2
Not fitted
SB15
SB16
Not fitted
GND
GND
GND
GND
PC[0..15]
R2
0R_0603
53
52
51
50
49
LRA_USB_P
LRA_USB_N
R1
0R_0603
TCXO_VCC
54
55
56
57
LRA_USB_P
LRA_USB_N
BOOT0
R3
NU/8MHz(12pF)
TCXO_VCC
MCO
SB13
PB[0..15]
Schematic diagrams
32/38
Figure 13. LoRa module
VDD_USB_LRA
Not fitted
C4
100nF
VDD_MCU_LRA
VDD_RF_LRA
PA8 /MCO
STLINK_TX
STLINK_RX
SX1276_DIO4
SX1276_DIO5
Not fitted
Not fitted
SB26
SB27
PA5 /ADC5/DAC2
PA4 /ADC4/DAC1
STLINK_TX
STLINK_RX
Fitted
Fitted
SB28
SB29
PA3 /ADC3
PA2 /ADC2
C5
10μF
C8
100nF
C6
10μF
C9
100nF
C7
10μF
C10
1uF
C11
100nF
Title: LoRa Module
Project: STM32 LoRa Discovery
Size: A4
Reference: MB1296
Date: 25/01/2017
Revision: D-01
Sheet: 4 of 6
UM2115
Antenna section with connectors
50R
i
50R
i
C12
UM2115
Figure 14. USB 2.0 FS and antenna
General purpose User Button (or LoRa Wake Up)
CN9
U.FL-R-SMT
Not fitted
Not fitted
L2
Not fitted
VDD_MCU_LRA
C39 and C40 have a common pad
on Antenna side signal
50R
i
ANT
ANT
PA0
Not fitted
SB30
RESET button
R5
4K7
Fitted
50R
i
C15
SB31
CN10
MCU_nRST
2
50R
i
MCU_nRST
3
PB2
C14
3
C13
Not fitted
2
L1
Not fitted
SMA
C16
100nF
C17
100nF
4
B2
Reset (Black)
1
B1
USER (Blue)
L4
Not fitted
4
L3
Not fitted
1
C14 and C15 are temporarily replaced by 0OHm resistor
R6
100R
USB Interface LoRa module
USB_LRA_5V
I/O1 I/O1
GND Vbus
I/O2 I/O2
USBLC6-2SC6
USB_LRA_5V
6
5
4
C18
100nF
CN11
USB_Micro-B receptacle
DocID029802 Rev 2
General purpose LEDs
U6
1
2
3
VBUS
DM
DP
ID
GND
Shield
Shield
Shield
Shield
EXP
EXP
1
2
3
4
5
6
7
8
9
10
11
LRA_USB_N
LRA_USB_P
R9
100K
Diff Pair 90ohm
i
LRA_USB_N
LRA_USB_P
i
Diff Pair 90ohm
LD2
PA5 SB34
Fitted
R8
PB5 SB32
Fitted
R11
A
K Red
510R
LD1
A
510R
PB6 SB33
Fitted
R10
PB7 SB35
Fitted
R12
K Green
LD3
K Blue
A
680R
LD4
A
K Red
680R
1050170001
To be placed on the opposite side of USB STLINK connector
PA[0..15]
PB[0..15]
PA[0..15]
PB[0..15]
Title: LoRa USB - Antenna
Project: STM32 LoRa Discovery
Size: A4
Reference: MB1296
Revision: D-01
Sheet: 5 of 6
33/38
Schematic diagrams
Date: 25/01/2017
PA[0..15]
PB[0..15]
PC[0..15]
PH[0..1]
SX1276_DIO[0..5]
CRF[1..3]
STSAFE_nRST
MCU_nRST
BOOT0
TCXO_VCC
Schematic diagrams
34/38
Figure 15. Connectors
PA[0..15]
PB[0..15]
PC[0..15]
PH[0..1]
SX1276_DIO[0..5]
CRF[1..3]
STSAFE_nRST
MCU_nRST
Extension connectors
BOOT0
TCXO_VCC
PB13
PA5
SB2
SB3
Fitted
Not fitted
VIN +5V +3V3 +5V
VDD_MCU_LRA
DocID029802 Rev 2
BOOT0
PA13
PA14
SX1276_DIO0
SX1276_DIO1
SX1276_DIO2
SX1276_DIO3
SX1276_DIO4
SX1276_DIO5
MCU_nRST
+3V3
+5V
VIN
PA0
PA4
PH1
PH0
IOREF
MCU_nRST
+3V3
+5V
GND
GND
VIN
1
2
3
4
5
6
7
8
Header 8X1_Female
CN6
A0
A1
A2
A3
A4
A5
SB7 Not fitted
SB8 Not fitted
PA0
PA0 Alias
PA4
PA4 Alias
A4
A5
1
2
3
4
5
6
Header 6X1_Female
Not fitted
Not fitted
SB10
SB1
PH1
PH0
Not fitted
Not fitted
SB11
SB12
PB9
PB8
Arduino Connector Arduino Connector
VDD_RF_LRA
VDD_USB_LRA
CN1
CN4
Arduino Connector
VDD_MCU_LRA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Arduino
Connector
TCXO_VCC
Arduino
R15
10K
CN2
10
9
8
7
6
5
4
3
2
1
D15
D14
AVDD
GND
PA5/PB13
D13
PB14
D12
PB15
D11
PB6
D10
D9
PB12
PA9
D8
PB8
PB9
Header 10X1_Female
CN5
PA8
8
PB2
7
PB7
6
PB5
5
PB13/NC
4
PA10
3
PA2
2
PA3
1
CN3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
D7
D6
D5
D4
D3
D2
D1
D0
Header 8X1_Female
PB13
SB9
Fitted
CRF1
CRF2
CRF3
STSAFE_nRST
VDD_MCU_LRA
PA5
PB13
PB14
PB15
PB6
PA9
PA12
PA11
PB12
PB2
PA8
PB7
PB5
PA10
PA2
PA3
PB9
PB8
Title: Connectors
Project: STM32 LoRa Discovery
Size: A4
Reference: MB1296
Date: 26/04/2017
Revision: D-01
Sheet: 6 of 6
UM2115
UM2115Federal Communications Commission (FCC), Industry Canada (IC) Compliance and other
Appendix B
Federal Communications Commission (FCC),
Industry Canada (IC) Compliance and other
Certifications
B.1
FCC Compliance Statement
B.1.1
ANSI C63.4 (2014) American National Standard for Methods of
Measurement of Radio-Noise Emissions from Low-Voltage Electrical
and Electronic Equipment in the Range of 9 kHz to 40 GHz
•
FCC CFR 47, PART 15, Subpart B
•
Industry Canada ICES-003 (Information Technology Equipment (ITE)) — Limits and
methods of measurement. Issue 6 (2016)
•
FCC Part 15 compliance statement
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation. This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, radiates radio frequency energy and, if not installed and used in
accordance with the instruction, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception which can
be determined by turning the equipment off and on, the user is encouraged to try to correct
interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Increase the separation between the equipment and receiver.
•
Connect the equipment into an outlet on circuit different from that to which the receiver
is connected.
•
Consult the dealer or an experienced radio/TV technician for help.
B.2
IC Compliance Statement
B.2.1
Industry Canada Licence-Exempt Radio Apparatus
This device complies with Industry Canada licence-exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils
radio exempts de licence.
L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas
produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage
radioélectrique subi, même si le brouillage est susceptible d'en compromettre le
fonctionnement.
DocID029802 Rev 2
35/38
37
Federal Communications Commission (FCC), Industry Canada (IC) Compliance and other Certifi-
B.2.2
Radio Frequency (RF) Exposure Compliance of
Radiocommunication Apparatus
To satisfy FCC and IC RF Exposure requirements for mobile devices, a separation distance
of 20 cm or more should be maintained between the antenna of this device and persons
during operation. To ensure compliance, operation at closer than this distance is not
recommended. This transmitter must not be co-located or operating in conjunction with any
other antenna or transmitter.
Pour satisfaire aux exigences FCC et IC concernant l'exposition aux champs RF pour les
appareils mobiles, une distance de séparation de 20 cm ou plus doit être maintenue entre
l'antenne de ce dispositif et les personnes pendant le fonctionnement. Pour assurer la
conformité, il est déconseillé d'utiliser cet équipement à une distance inférieure. Cet
émetteur ne doit pas être co-situé ou fonctionner conjointement avec une autre antenne ou
un autre émetteur.
Measures and tests performed on the sample of the product B-L072Z-LRWAN1, show
compliance with standards FCC CFR 47, PART 15, Subpart B and ICES-003.
B.3
Other certifications
B.3.1
EN 55032 (2012) / EN 55024 (2010) ETSI EN 301 489-1 (v1.9.2) /
ETSI EN 301 489-3 (v1.6.1) EN 60950-1
(2006+A11/2009+A1/2010+A12/2011+A2/2013) CFR 47,
FCC Part 15,Subpart B (Class B Digital Device) and
Industry Canada ICES-003 (Issue 6/2016)
The sample examined is in conformance with the requirements of above standards.
Note: The sample examined shall be powered by a power supply unit or auxiliary equipment
complying with standard:
EN 60950-1: 2006+A11/2009+A1/2010+A12/2011+A2/2013, and shall be Safety Extra Low
Voltage (SELV) with limited power capability.
B.3.2
Electrical Safety qualification for CE marking: EN 60950-1
(2006+A11/2009+A1/2010+A12/2011+A2/2013) IEC 60650-1
(2005+A1/2009+A2/2013)
The appliance complies with requirements of above mentioned standards.
B.3.3
EMC qualification accordingly to standard CFR 47, FCC Part 15,
Subpart B & Industry Canada ICES-003 (Issue 6/2016)
Class B Digital Device
The appliance complies with requirements of above mentioned standards.
B.3.4
CE qualification according to standards:
ETSI EN 300 220-1 V2.4.1 (2012) / V3.1.1 (2017) ETSI EN
300 220-2 V2.4.1 (2012) / V3.1.1 (2017) RF Module already
certified – Partial test only
The appliance complies with requirements of above mentioned standards.
36/38
DocID029802 Rev 2
UM2115
Revision history
Revision history
Table 12. Document revision history
Date
Revision
14-Feb-2017
1
Initial version.
2
Added Section Appendix A: Schematic diagrams.
Updated Section 10.2: Board revision history and Section 10.3:
Known limitations.
Updated Section Appendix A: Schematic diagrams with Rev. D
board schematics.
26-Sep-2017
Changes
DocID029802 Rev 2
37/38
37
UM2115
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order
acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2017 STMicroelectronics – All rights reserved
38/38
DocID029802 Rev 2
Source Exif Data:
File Type : PDF File Type Extension : pdf MIME Type : application/pdf PDF Version : 1.3 Linearized : No Tagged PDF : Yes Page Layout : SinglePage Page Mode : UseNone Page Count : 38 Producer : Acrobat Elements 10.0.0 (Windows); modified using iText 2.1.7 by 1T3XT Keywords : Technical Literature, 029802, Product Development, Specification, User manual, B-L072Z-LRWAN1 Subject : - Modify Date : 2017:10:05 09:55:55+02:00 Creator : C2 v4.2.0220 build 670 - c2_rendition_config : Techlit_Active Title : Discovery kit for LoRaWAN™ and LPWAN protocols with STM32L0 Revision : 2 Classification : Unclassified Alternate Name : UM2115 Alternate ID : 029802 Document Type : User manual Author : STMICROELECTRONICS Create Date : 2017:09:26 17:10:12ZEXIF Metadata provided by EXIF.tools