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Introduction

The 

X-NUCLEO-S2868A2

 expansion board is based on the 

S2-LP

 ultra-low power RF transceiver and operates in the 868 MHz

ISM frequency band.

The 

X-NUCLEO-S2868A2

 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.

The expansion board is compatible with ST morpho and Arduino UNO R3 connectors.

Figure 1. 

X-NUCLEO-S2868A2 expansion board

Getting started with the X-NUCLEO-S2868A2 Sub-1 GHz 868 MHz RF expansion 

board based on S2-LP radio for STM32 Nucleo

UM2638

User manual

UM2638

 - 

Rev 1

 - 

December 2019

For further information contact your local STMicroelectronics sales office.

www.st.com

Содержание X-NUCLEO-S2868A2

Страница 1: ...IO pins You can change some of the GPIOs by mounting or removing the resistors The expansion board is compatible with ST morpho and Arduino UNO R3 connectors Figure 1 X NUCLEO S2868A2 expansion board Getting started with the X NUCLEO S2868A2 Sub 1 GHz 868 MHz RF expansion board based on S2 LP radio for STM32 Nucleo UM2638 User manual UM2638 Rev 1 December 2019 For further information contact your ...

Страница 2: ...ead only memory GHz Giga Hertz GUI Graphical user interface LED Light emitting diode MCU Microcontroller unit P2P Point to point communication RF Radio frequency communication SPI Serial peripheral interface USB Universal serial bus wM Bus Wireless metering bus WSN Wireless sensors network UM2638 Acronyms and abbreviations UM2638 Rev 1 page 2 19 ...

Страница 3: ...nowledgement retransmission and timeout protocol engine Compatible with STM32 Nucleo boards Compatible with Arduino UNO R3 connectors BALF SPI2 01D3 IPD balun for matching network and harmonics filter Sigfox compatible Sample firmware for P2P communication 6LoWPAN compatible thanks to STM32Cube RoHS and WEEE compliant The X NUCLEO S2868A2 expansion board can be used for the evaluation of the S2 LP...

Страница 4: ...e to connect the STM32 Nucleo board to the PC laptop 128 MB of RAM Approximately 40 MB of hard disk space for the firmware Approximately 15 MB of hard disk space for the wM Bus GUI The use of the wM Bus concentrator with the GUI requires additional boards to be connected to the PC The GUI can be used to check the wM Bus communication protocol 2 3 Board setup Step 1 Check that the jumper on JP1 con...

Страница 5: ...ct occurs when using other expansion board refer to next section Table 3 X NUCLEO S2868A2 and NUCLEO L152RE connection details right connector Signal name D15 D14 AREF GND D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Connector name CN5 Digital CN9 Digital Pin number 10 9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 NUCLEO L152RE MCU port PB8 PB9 PA5 PA6 PA7 PB6 PC7 PA9 PA8 PB10 PB4 PB5 PB3 PA10 PA2 PA3 X NUCL...

Страница 6: ...ion mount R19 unmount R10 To use the optional connections modify the firmware on the basis of the STM32 resources used 3 3 Current measurement To monitor the X NUCLEO S2868A2 expansion board power consumption use jumper JP1 connect an ammeter probe between the connector pins 1 and 2 for measurements 3 4 X NUCLEO S2868A2 component placement details The figure below shows the component placement on ...

Страница 7: ... to 5 5 V 4 2 S2 LP RF transceiver The X NUCLEO S2868A2 expansion board is based on the S2 LP standalone RF transceiver It operates in the 868 MHz ISM frequency band and wireless M Bus The 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 Table 5 S2 LP details Features Description Order cod...

Страница 8: ... F C C1 13 3 NC 6 4 VSS CSN 14 15 S SM MA A A AN NT TE EN NN NA A M M9 95 56 64 40 0 7 C C2 25 5 3V3 3V3 C C4 4 C C8 8 4 4 7 7n nH H RXP SDN 6 C C_ _1 15 50 0n n_ _0 04 40 02 2 SCLK VSMPS2 nS VRSYNTH 9 VDD 1 L L8 8 C C_ _1 10 00 0n n_ _0 04 40 02 2 C C_ _4 47 70 0p p_ _0 04 40 02 2 SCL SCLK 3V3 VDDRXDIG SDO Q 2 3V3 2 2 2 2K K nHOLD C 6 C C4 41 1 VDDRXDIG SDA VDDVCOTX C C_ _1 15 50 0n n_ _0 04 40 0...

Страница 9: ...10 21 E5V PA14 PB0 PC1 26 28 PB15 PC12 PB10 2 30 27 29 PB13 12 14 CN7 PC0 PC5 PC15 PA3 PB14 PA8 33 PA10 PH1 PF1 PD1 PA12 35 1 3 5 7 9 34 NC PF7 32 PC11 PD2 1 3 5 7 9 PH0 PF0 PD0 PA2 PA4 PA9 2 4 6 8 10 PC14 16 PA11 30 32 35 34 PB4 PB1 9 18 PC7 12 14 PC6 PB12 23 PA5 33 36 38 28 19 PB5 17 1 20 PB8 PC13 U5V VIN PB6 16 PC4 NC PF6 PB2 NC PF4 25 18 PB9 AVDD 3 37 CN10 21 23 22 24 PB3 PB7 15 PA0 PA1 5V NC ...

Страница 10: ... Murata GRM155R71C104KA88D 9 1 C12 1 µF 16 V 10 SMD 0603 SMPS OUT filter capacitor Murata EMK107BJ105KA T 10 1 C13 10 pF 50 VDC 5 SMD 0402 Capacitor KEMET C0402C100J5GACAUTO7411 or equivalent 11 1 C14 12 pF 50 V 5 SMD 0402 Capacitor Yageo CC0402JRNPO9BN120 or equivalent 12 2 C16 C36 100 pF 16V 5 SMD 0402 KEMET C0402C101J3GACTU 13 1 C17 100 pF 16V 5 SMD 0402 not mounted KEMET C0402C101J3GACTU 14 1 ...

Страница 11: ...10 R 1 16 W 1 SMD 0402 Resistor Yageo RC0402FR 0710RL 31 1 R37 0 R 1 16 W 1 SMD 0402 Resistor Tyco Electronics CRG0402ZR 32 3 R35 R36 R38 2 2 K 1 16 W 1 SMD 0402 Resistors Yageo RC0402FR 072K2L 33 1 TP1 Test point Any Any 34 1 U1 M95640 8 SOIC 64 Kbit SPI bus EEPROM with high speed clock ST M95640 RMN6TP 35 1 U2 S2 LP QFN 24L Ultra low power high performance sub 1 GHz transceiver ST S2 LPQTR 36 1 ...

Страница 12: ...Item Q ty Ref Part Value Description Manufacturer Order code 41 1 C18 2 7 pF 100 V 0 25 pF SMD_0402 Shunt Murata GRM1555C2A2R7CA01D UM2638 Bill of materials UM2638 Rev 1 page 12 19 ...

Страница 13: ...esidential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions 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 b...

Страница 14: ... the user s authority to operate the equipment Conformité à Innovation Sciences et Développement Économique Canada Cet appareil est conforme aux normes RSS d Innovation Science et Développement économique L utilisation est soumise aux deux conditions suivantes 1 cet appareil ne doit pas causer d interférences nuisibles et 2 cet appareil doit accepter de recevoir tous les types d interférence y com...

Страница 15: ...Revision history Table 7 Document revision history Date Revision Changes 12 Dec 2019 1 Initial release UM2638 UM2638 Rev 1 page 15 19 ...

Страница 16: ...ction options 5 3 3 Current measurement 6 3 4 X NUCLEO S2868A2 component placement details 6 4 X NUCLEO S2868A2 on board device description 7 4 1 SPI EEPROM 7 4 2 S2 LP RF transceiver 7 5 Schematic diagrams 8 6 Bill of materials 10 7 Formal notices required by the U S Federal Communications Commission FCC 13 8 Formal product notice required by the Industry Canada IC 14 Revision history 15 UM2638 C...

Страница 17: ...eft connector 5 Table 3 X NUCLEO S2868A2 and NUCLEO L152RE connection details right connector 5 Table 4 S2 LP interface optional with STM32 Nucleo board 6 Table 5 S2 LP details 7 Table 6 X NUCLEO S2868A2 bill of materials 10 Table 7 Document revision history 15 UM2638 List of tables UM2638 Rev 1 page 17 19 ...

Страница 18: ... an STM32 Nucleo development board 4 Figure 3 X NUCLEO S2868A2 on board device placement 6 Figure 4 X NUCLEO S2868A2 circuit schematic 8 Figure 5 X NUCLEO S2868A2 circuit schematic Arduino connectors 8 Figure 6 X NUCLEO S2868A2 circuit schematic ST morpho connectors 9 UM2638 List of figures UM2638 Rev 1 page 18 19 ...

Страница 19: ...cts 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 For additional information about S...

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