X-NUCLEO-S2868A1
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
Support to SMD and SMA antennas
BALF-SPI2-01D3
IPD balun for matching network and harmonics filter
Sigfox compatible
Sample firmware for P2P communication
6LoWPAN compatible thanks to
STM32Cube
RoHS compliant
Product summary
Sub-1 GHz RF
expansion board
based on S2-LP
radio for STM32
Nucleo
Ultra-low power,
high
performance,
sub-1 GHz
transceiver
50 Ω nominal
input/conjugate
match balun to
S2-LP, 868-930
MHz with
integrated
harmonics filter
X-NUCLEO-S2868A1
Description
The
X-NUCLEO-S2868A1
expansion board is based on the
S2-LP
radio and
operates in the 868 MHz ISM frequency band.
The expansion board is compatible with
ST
morpho and Arduino UNO R3
connectors.
The X-NUCLEO-S2868A1 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.
S2-LP
BALF-SPI2-01D3
DB3602
-
Rev 1
-
May 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
X-NUCLEO-S2868A1
X-NUCLEO-S2868A1 schematic diagram
1
X-NUCLEO-S2868A1 schematic diagram
Figure 1.
X-NUCLEO-S2868A1 circuit schematic
VDD
VDDSMPS
C2
C1
C_4.7U_0603
C_150n_0402
VDD
VDDVCOTX
C4
C_100p_0402
VDD
VDDANASYNTH
C6
C5
C_150n_0402
C_100p_0402
VDD
VDDRXDIG
C8
C_100p_0402
+3V3
VRSYNTH
R1
C30
C_150n_0402
R_100k_0402
U1
nS
SDO
C10
GPIO2
GPIO3
GPIO0
GPIO1
CSN
C_150n_0402
R2
R_100k_040
1
2
3
4
nS
Q
nW
VSS
VCC
nHOLD
C
D
8
7
6
5
SCLK
SDI
R3
C9
C_100n_0402
M95640
24
23
22
21
GPIO3
GPIO2
GPIO1
GPIO0
C_150n_0402 C_1u_0603
R33
L2
L_10U_0805
VRDIG
CSN
C32
C12
VDDSMPS
20
19
U2
R_100k_0402
1
2
3
VDDSMPS
SMPS1
SMPS2
XOUT
VDDANASYNTH
XIN
SDN
SCLK
SDI
SDO
VDDRXDIG
RXP
VDDVCOTX
VRSYNTH
VREFVCO
RXN
VRRF
GND
18
17
16
15
14
13
SCLK
SDI
SDO
R37
0R
VDDRXDIG
U3
1. 4 V t o 1. 8 V m
ax
VSMPS2
0R
OUT
IN
SDN
4
5
6
A1
B1
C1
RX_P GND1
RX_N ANT
TX
GND2
A2
B2
C2
C16
100pF
C17
NM
L11
NM
J1
SMA ANT ENNA
VDDVCOTX
VDDANASYNTH
Y1
OUT
C14
C_12pF_0603
VRSYNTH
R24
10R
C25
IN
25
9
10
11
12
7
8
S2-LP
TX
BALF-SPI2-01D3
L12
NM
C22
C_150n_0402
L13
NM
3
2
1
C_470p_0402
C36
100pF
L7
4
CRYST AL_NX1612SA
C13
L_12nH_0603
10pF
VSMPS2
C34
C35
E1
C_150n_0402 C_100p_0402
L8
4.7nH
U4
AM11DG-ST 01
NM
+3V3
+3V3
C42
10uF
R38
2.2K
1
2
RESET
VCC
NC
GND
NC
SCL
NC
SDA
8
7
6
5
SDA
R35
2.2K
R36
2.2K
SCL
C41
100nF
3
4
ST SAFE-A100
NM
+3V3
+3V3
Figure 2.
X-NUCLEO-S2868A1 circuit schematic - Arduino connectors
ARDUINO UNO R3 SX connector
CN6
SCL
SDA
AVDD
SCLK
SDO
SDI
CSN
PC7
nS
R6
R4
R5
R9
R17
R7
NM
0
0
NM
NM
NM
ARDUINO UNO R3 DX connector
CN5
NC
IOREF
RESET
3V3
5V
GND
GND
VIN
1
2
3
4
5
6
7
8
IOREF
RESET
+5V
VIN
+3V3
JP1
VDD
1
JUMPER
2
10
9
8
7
6
5
4
3
2
1
SCL
SDA
AREF
GND
SCK/D13
MISO/D12
MOSI/PWM/D11
PWM/D10
PWM/D9
D8
8 pass-through:
male on bottom
and female on top
Pass-through:
male on bottom
and female on top
CN9
CN8
A0
A1
A2
A3
A4
A5
1
2
3
4
5
6
R12
R13
R14
R15
R18
R16
0
0
0
0
NM
0
GPIO0
CSN
GPIO1
GPIO2
GPIO0
GPIO3
PC7
SDN
SDN
nS
SCLK
D11
R10
R19
R22
R11
0
NM
0
0
PA2
PA3
R23
330
LED
8
7
6
5
4
3
2
1
D7
D6
D5
D4
D3
D2
TXD/D1
RXD/D0
6 pass-through:
male on bottom
and female on top
Pass-through:
male on bottom
and female on top
DB3602
-
Rev 1
page 2/5
X-NUCLEO-S2868A1
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.
© 2018 STMicroelectronics – All rights reserved
DB3602
-
Rev 1
page 5/5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
