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Table 5. S2-LP interface (optional) with Nucleo board

S2-LP signal

Default STM32

port

Optional STM32 port

CSn

PA1

PB6

To use optional connection mount R9, demount R13

CLK

PB3

PA5

To use optional connection

mount R6, demount R11

PB4

PA9

To use optional connection mount R7, demount R19

SDN

PA8

PB10
To use optional connection mount R18, demount R10

To use the optional connections, modify the firmware on the basis of the

STM32 resources used.

SKY66420 power amplifier setting:

SW1

SW2

LNA ON

soldered a 100 pF cap between 1 – 2

soldered a 100 pF cap between 1 - 3

LNA OFF

soldered a 100 pF cap between 1 - 3

soldered a 100 pF cap between 1 - 2

SKY66420
signal

Default STM32 port

Optional STM32 port

GPIO0

PA0

PC1

To use optional connection mount R25,

demount R12

GPIO1

PA4

GPIO2

PB0

Summary of Contents for X-NUCLEO-S915A1

Page 1: ...Arduino UNO R3 connectors The 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 The boards are equipped with the following features On board S2 LP sub 1 GHz transceiver device SPI EEPROM for saving parameters 860 to 930 MHz RF Front End Module power amplifier LED for user interf...

Page 2: ...scription and configuration 8 3 1 Interconnection details 8 3 2 SPI and GPIO connection options 9 3 3 Current measurement 11 3 4 X NUCLEO S2915A1 component placement details 11 4 Component description 12 4 1 S2 LP Radio 12 4 2 SPI EEPROM 12 5 Formal Notices Required by the U S Federal Communications Commission FCC 13 6 Formal Notices Required by the Industry Canada IC 14 7 OEM Integration Instruct...

Page 3: ...plications The evaluation boards can be used for evaluation of the S2 LP device in multiple applications The following demo examples are available for testing with the evaluation boards wM Bus Wireless Metering Bus demo Point to point communication protocol demo 6LoWPAN applications SigFox Communication Please refer to the data brief for the firmware available on www st com Users can develop other...

Page 4: ...erasable programmable read 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 TBD To Be Done ...

Page 5: ...rs Support to wireless M Bus Excellent performance of receiver sensitivity up to 130 dBm Automatic acknowledgement retransmission and timeout protocol engine Compatible with STM32 Nucleo boards Compatible with Arduino UNO R3 connectors Support SMA antennas BALF SPI2 01D3 IPD balun for matching network and harmonics filter Sigfox compatible Sample firmware for P2P communication 6LoWPAN compatible t...

Page 6: ...ow 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 any STM32 Nucleo board although complete testing has been performed using NUCLEO L053R8 NUCLEOF401RE and NUCLEO L152RE boards hosting the ultra low power STM32 The following software and hardware specifica...

Page 7: ...ard setup Perform the following steps to set up the board Step 1 Check that the jumper on J1 connector is connected to provide the required voltage to the board devices Step 2 Connect the X NUCLEO S2915A1 to the STM32 Nucleo board as shown in Figure 2 X NUCLEOS2915A1 expansion board connected to an STM32 Nucleo development board Step 3 Power the Nucleo development board using the Mini B USB cable ...

Page 8: ...h could be useful to understand the board schematics 3 1 Interconnection details The X NUCLEO S2915A1 expansion board and the NUCLEO F401RE or NUCLEO L152RE board connection details are listed in the table below Table 3 Left connector connection details Left connector CN6 Power CN8 Analog 1 2 3 4 5 6 7 8 1 2 3 4 5 6 GPIO0 CSN GPIO1 GPIO2 GPIO0 GPIO3 ...

Page 9: ...8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 SCL SDA GND SPI_CLK SPI_MISO SPI_MOSI SPI_CSN nS SDN SDN nS SPI_CLK Note Optional connection 3 2 SPI and GPIO connection options The SPI and GPIO connection options between the STM32 and S2 LP can be used to enable different configurations in case a signal conflict occurs when using other expansion boards ...

Page 10: ...mount R19 SDN PA8 PB10 To use optional connection mount R18 demount R10 To use the optional connections modify the firmware on the basis of the STM32 resources used SKY66420 power amplifier setting SW1 SW2 LNA ON soldered a 100 pF cap between 1 2 soldered a 100 pF cap between 1 3 LNA OFF soldered a 100 pF cap between 1 3 soldered a 100 pF cap between 1 2 SKY66420 signal Default STM32 port Optional...

Page 11: ...re S2 LP X NUCLEO S2915A1 board jumper J1 can be used Connect an ammeter probe between pins 1 and 2 of the connector for measurements 3 4 X NUCLEO S2915A1 component placement details Figure 3 shows the component placement on the S2 LP expansion X NUCLEO S2915A1 board Figure 3 X NUCLEO S2915A1 component placement details ...

Page 12: ...o 3 6 V S2 LP narrow band ultra low power sub 1 GHz transceiver is tuned for 902 928 MHz frequency bands 4 2 SPI EEPROM The M95640 R is a 64 Kbit serial SPI bus EEPROM with high speed clock interface The device can be used to store the configuration parameters related to application or settings of the S2 LP RF device The part numbers used to develop this application are shown in Table 8 Table 8 SP...

Page 13: ...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 the interference s by one or more of the following measures Reorient or r...

Page 14: ...s d entraîner un fonctionnement indésirable Les changements ou les modifications non expressément approuvés par le fabricant pourraient annuler le permis d utiliser l équipement Radio Frequency RF Exposure Information The radiated output power of the Wireless Device is below the Industry Canada IC radio frequency exposure limits The Wireless Device should be used in such a manner such that the pot...

Page 15: ...ated for any type listed are strictly prohibited for use with this device Le présent émetteur radio 8976C S2915A1 a été approuvé par Innovation Sciences et Développement économique Canada pour fonctionner avec les types d antenne énumérés ci dessous et ayant un gain admissible maximal Les types d antenne non inclus dans cette liste et dont le gain est supérieur au gain maximal indiqué pour tout ty...

Page 16: ...sional Installation policy is applicable to that host and then the C2PC or New Filing is required for that host to approve the antenna requirement is complied with As long as two conditions above are met this module could be installed into that host However the OEM integrator is still responsible for testing their end product for any additional compliance requirement with this module installed exa...

Page 17: ...ment 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...

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