X-NUCLEO-S2868A2

X-NUCLEO-S2868A2 Data brief Sub-1 GHz 868 MHz RF expansion board based on S2-LP radio for STM32 Nucleo Features 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 +16 dBm Modulation schemes: 2-FSK, 2-GFSK, 4-FSK, 4-GFSK, OOK and ASK Air data rate from 0.1 to 500 kbps Ultra-low power consumption: 7 mA RX and 10 mA TX at +10 dBm IEEE 802.15.4g hardware packet support with whitening, FEC, CRC and dual SYNC word detection RX and TX 128 byte FIFO buffers 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 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 Product summary Description Sub-1 GHz RF The X-NUCLEO-S2868A2 expansion board is based on the S2-LP ultra-low power expansion board based X-NUCLEO- RF transceiver and operates in the 868 MHz ISM frequency band. on S2-LP radio for S2868A2 STM32 Nucleo 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 Ultra-low power, high performance, sub-1 GHz S2-LP removing the resistors. transceiver The expansion board is compatible with ST morpho and Arduino UNO R3 50 nominal input/ connectors. conjugate match balun to BALF- S2-LP, 868-930 MHz SPI2-01D3 with integrated harmonic filter ISM Radio SubGHz Applications Sigfox DB4048 - Rev 1 - December 2019 www.st.com For further information contact your local STMicroelectronics sales office.X-NUCLEO-S2868A2 Schematic diagrams 1 Schematic diagrams Figure 1. X-NUCLEO-S2868A2 circuit schematic VDD VDD VDD VDD VDDSMPS VDDVCOTX VDDANASYNTH VDDRXDIG +3V3 CC22 CC44 CC66 CC88 CC11 CC55 CC 44..77UU 00660033 CC 115500nn 00440022 CC 110000pp 00440022 CC 115500nn 00440022 CC 110000pp 00440022 CC 110000pp 00440022 VRSYNTH RR22 RR11 RR 110000kk 004400 CC3300 CC 115500nn 00440022 RR 110000kk 00440022 UU11 nS 1 8 nS VCC SDO 2 7 Q nHOLD CC1100 3 6 SCLK nW C CC99 CC 115500nn 00440022 SDI CC 110000nn 00440022 4 5 VSS D RR33 MM9955664400 UU22 RR 110000kk 00440022 CC3322 CC1122 CC 115500nn 00440022 CC 11uu 00660033 VDDSMPS 1 18 SCLK LL22 VDDSMPS SCLK LL33 1. 4 V t o 1. 8 V max VSMPS2 2 17 SDI SMPS1 SDI LL 3399nnHH 00440022 LL 1100UU 00880055 SDO 3 16 SMPS2 SDO OUT RR3377 VDDRXDIG UU33 4 15 XOUT VDDRXDIG 00RR IN 5 14 A1 A2 XIN RXP RX P GND1 CC1166 SDN 110000ppFF 6 13 B1 B2 SDN RXN RX N ANT SSMMAA AANNTTEENNNNAA C1 C2 JJ11 TX GND2 CC1177 CC1188 NNMM 22..77ppFF,,00440022 LL1111 SS22--LLPP BBAALLFF--SSPPII22--0011DD33 NNMM VDDANASYNTH LL1122 VRSYNTH RR2244 NNMM YY11 1100RR OUT 3 CC2222 2 CC2255 CC 115500nn 00440022 CC1144 IN 1 CC 447700pp 00440022 LL1133 CC 1122ppFF 00660033 4 NNMM CC3366 110000ppFF LL77 CCRRYYSSTTAALL NNXX11661122SSAA CC1133 VSMPS2 EE11 LL 1122nnHH 00660033 1100ppFF CC3344 CC3355 CC 115500nn 00440022 CC 110000pp 00440022 AAMM1111DDGG--SSTT0011 NM LL88 44..77nnHH UU44 RR3388 22..22KK 1 8 +3V3 RESET NC 2 7 SCL +3V3 VCC SCL 3 6 NC NC CC4422 CC4411 SDA 4 5 RR3366 GND SDA 1100uuFF 110000nnFF 22..22KK RR3355 SSTTSSAAFFEE--AA110000 22..22KK Arduino UNO R3 SX connector Arduino UNO R3 DX connector +3V3 NM +3V3 Figure 2. X-NUCLEO-S2868A2 circuit schematic - Arduino connectors CCNN55 CCNN66 SCL 10 SCL SDA 1 9 NC SDA IOREF +3V3 VDD AVDD 2 8 IOREF AREF RESET JJPP11 3 7 RESET GND SCLK RR66 NNMM 4 1 2 6 3V3 SCK/D13 +5V SDO RR44 00 5 5 5V MISO/D12 JJUUMMPPEERR SDI RR55 00 6 4 GND MOSI/PWM/D11 CSN 7 RR99 NNMM 3 GND PWM/D10 VIN PC7 RR1177 NNMM 8 2 VIN PWM/D9 nS RR77 NNMM 1 D8 8 Pass-Through: Male on Bottom Pass-Through: and Female on Male on Bottom Top and Female on Top CCNN99 CCNN88 SDN RR1100 00 8 D7 RR1122 00 GPIO0 SDN RR1199 NNMM 1 7 A0 D6 RR1133 00 CSN nS RR2222 00 2 6 A1 D5 RR1144 00 GPIO1 3 5 A2 D4 GPIO2 SCLK 4 RR1155 00 RR1111 00 4 A3 D3 RR1188 NNMM GPIO0 5 3 A4 D2 RR1166 00 GPIO3 DD11 PA2 6 2 A5 TXD/D1 PC7 RR2233 333300 PA3 1 RXD/D0 6 Pass-Through: LLEEDD Pass-Through: Male on Bottom Male on Bottom and Female on and Female on Top Top DB4048 - Rev 1 page 2/5 7 24 VDDANASYNTH VRDIG 8 23 GPIO3 VRSYNTH GPIO3 9 22 GPIO2 VREFVCO GPIO2 VDDVCOTX 10 21 GPIO1 VDDVCOTX GPIO1 11 20 GPIO0 TX GPIO0 CSN 12 19 VRRF CSN 25 GND