ST X-NUCLEO-S2915A1 User Manual
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ST X-NUCLEO-S2915A1 User Manual

Sub-1 ghz 915 mhz rf expansion board based on s2-lp radio for stm32 nucleo
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Getting started with the X-NUCLEO-S2915A1 Sub-1 GHz 915 MHz RF expansion
Introduction
The
X-NUCLEO-S2915A1
expansion board is based on the
The expansion board is compatible with ST morpho and Arduino UNO R3 connectors.
The
X-NUCLEO-S2915A1
interfaces with the
change some of the GPIOs by mounting or removing the resistors.
UM2641 - Rev 1 - November 2019
For further information contact your local STMicroelectronics sales office.
board based on S2-LP radio for STM32 Nucleo
S2-LP
STM32 Nucleo
microcontroller via SPI connections and GPIO pins. You can
Figure 1.
X-NUCLEO-S2915A1 expansion board
radio and operates in the 915 MHz ISM frequency band.
UM2641
User manual
www.st.com

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Summary of Contents for ST X-NUCLEO-S2915A1

  • Page 1 X-NUCLEO-S2915A1 expansion board is based on the S2-LP radio and operates in the 915 MHz ISM frequency band. The expansion board is compatible with ST morpho and Arduino UNO R3 connectors. X-NUCLEO-S2915A1 interfaces with the STM32 Nucleo microcontroller via SPI connections and GPIO pins. You can change some of the GPIOs by mounting or removing the resistors.

  • Page 2: Acronyms And Abbreviations

    UM2641 Acronyms and abbreviations Acronyms and abbreviations Table 1. List of acronyms Acronym Description Automatic meter reading EEPROM Electrically erasable programmable read only memory Giga Hertz Graphical user interface Light emitting diode Microcontroller unit Point-to-point communication Radio frequency communication Serial peripheral interface Universal serial bus wM-Bus Wireless metering bus...

  • Page 3: Getting Started

    UM2641 Getting started Getting started Overview X-NUCLEO-S2915A1 main features are: • Based on S2-LP radio • S2-LP narrow band ultra-low power sub-1 GHz transceiver tuned for 860-940 MHz frequency band • Programmable RF output power up to +27 dBm •...

  • Page 4: Hardware And Software Requirements

    X-NUCLEO-S2915A1 expansion board, connect the boards as shown below. Figure 2. X-NUCLEO-S2915A1 expansion board connected to an STM32 Nucleo development board The interconnection between the STM32 Nucleo and the X-NUCLEO-S2915A1 has been designed to allow using...

  • Page 5: Hardware Description And Configuration

    Interconnection details X-NUCLEO-S2915A1 expansion board and the NUCLEO-F401RE NUCLEO-L152RE board connection details are listed in the table below. Table 2. X-NUCLEO-S2915A1 and NUCLEO-L152RE connection details (left connector) Signal name IOREF RESET Connector name CN6 Power CN8 Analog Pin number NUCLEO-L152RE MCU port...

  • Page 6: Current Measurement

    To monitor the X-NUCLEO-S2915A1 expansion board power consumption, use jumper J1: connect an ammeter probe between the connector pins 1 and 2 for measurements. X-NUCLEO-S2915A1 component placement details The figure below shows the component placement on the X-NUCLEO-S2915A1 expansion board.
  • Page 7 UM2641 X-NUCLEO-S2915A1 component placement details Figure 3. X-NUCLEO-S2915A1 on-board device placement Arduino UNO R3 left connector Arduino UNO R3 right connector S2-LP SKY66420 UM2641 - Rev 1 page 7/20...

  • Page 8: X-Nucleo-S2915A1 On-Board Device Description

    UM2641 X-NUCLEO-S2915A1 on-board device description X-NUCLEO-S2915A1 on-board device description S2-LP radio X-NUCLEO-S2915A1 expansion board is based on the S2-LP standalone RF transceiver. It operates in the 915 MHz ISM frequency band and wireless M-Bus. S2-LP narrow band ultra-low power sub-1 GHz transceiver is tuned for 430-470 MHz and 860 - 940 MHz, frequency bands and programmable RF output power up to +16 dBm.

  • Page 9: Schematic Diagrams

    Schematic diagrams Figure 4. X-NUCLEO-S2915A1 circuit schematic +3V3 VDDSMPS VDDVCOTX VDDANASYNTH VDDRXDIG LNA ON: SW1 soldered a 100 pF cap between 1 - 2 SW2 soldered a 100 pF cap between 1 - 3 LNA OFF: SW1 soldered a 100 pF cap between 1 - 3 C_4.7U_0402...
  • Page 10 RXD/D0 6 pass-through: Pass-through: male on bottom male on bottom and female on top and female on top Figure 6. X-NUCLEO-S2915A1 circuit schematic - ST morpho connectors ST morpho SX connector ST morpho DX connector CN10 PC10 PC11 PC12 BOOT0...

  • Page 11: Bill Of Materials

    UM2641 Bill of materials Bill of materials Table 8. X-NUCLEO-S2915A1 bill of materials Item Ref. Part/Value Description Manufacturer Order code CON10 550 V 2.54 Connector SAMTEC SSQ-110-03-F-S mm pitch CON8 550 V 2.54 CN6, CN9 Connectors SAMTEC SSQ-108-03-F-S mm pitch...
  • Page 12 UM2641 Bill of materials Item Ref. Part/Value Description Manufacturer Order code 1 nF 50 V ±10% Capacitors Murata GCM155R71H102KA37D SMD-0402 4.7 µF 10 V ±10% C57, C1 Capacitors Murata ZRB15XR61A475KE01D SMD-0402 120 pF 50 V ±2% Capacitors Murata GRM1555C1H121GA01D SMD-0402 10 nF 16 V ±10% Capacitors Taiyo Yuden...
  • Page 13 UM2641 Bill of materials Item Ref. Part/Value Description Manufacturer Order code VBAT bypass SW KEY-SPDT (100 capacitors (SW1 : SW1, SW2 pF) 25 V ±5% Kemet C0402C101J3GACTU 1-3 NM SW2 : 1-2 SMD-0402 64 Kbit SPI bus M95640 8-SOIC EEPROM with M95640-RMN6 high-speed clock Ultra-low power,...

  • Page 14: Formal Notices Required By The U.s. Federal Communications Commission ("Fcc")

    UM2641 Formal notices required by the U.S. Federal Communications Commission ("FCC") Formal notices required by the U.S. Federal Communications Commission ("FCC") FCC NOTICE: This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

  • Page 15: Formal Product Notice Required By The Industry Canada ("Ic")

    UM2641 Formal product notice required by the Industry Canada ("IC") Formal product notice required by the Industry Canada ("IC") Innovation, Science and Economic Development Canada Compliance - This device complies with Innovation, Science and Economic Development RSS standards. 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.

  • Page 16: Revision History

    UM2641 Revision history Table 9. Document revision history Date Revision Changes 18-Nov-2019 Initial release. UM2641 - Rev 1 page 16/20...

  • Page 17: Table Of Contents

    X-NUCLEO-S2915A1 component placement details ....... . . 6 X-NUCLEO-S2915A1 on-board device description ........8 S2-LP radio .
  • Page 18 List of acronyms ..............2 Table 2. X-NUCLEO-S2915A1 and NUCLEO-L152RE connection details (left connector) ......5 Table 3.
  • Page 19 X-NUCLEO-S2915A1 circuit schematic - ST morpho connectors....... . . 10...
  • Page 20 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’...

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