DocID027622 Rev 2
11/21
UM1872
Component description
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4
Component description
This section describes the devices on the board.
4.1
SPSGRF-868 / SPSGRF-915 module
The SPSGRF modules are based on the SPIRIT1 device which is a low data rate, low
power sub-1 GHz transceiver. The SPSGRF-868 module is for 868 MHz RF communication
and the SPSGRF-915 module is for 915 MHz RF communication. The SPSGRF-868 is an
ETSI certified module and SPSGRF-915 is an FCC and IC certified module SPSGRF-915
(FCC ID: S9NSPSGRF and IC: 8976C-SPSGRF).
The interface of the device to the STM32 Nucleo boards is through an SPI interface and
some GPIOs. The SPSGRF module also integrates the balun BALF-SPI-01D3 and a chip
antenna.
The part numbers used to develop this application are shown in
Table 7
.
The SPIRIT1 device is designed to operate both in the license-free ISM and SRD frequency
bands at 169, 315, 433, 868, and 915 MHz.
The SPSGRF modules are designed for fixed frequencies specified in the part number.
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 SPIRIT1 device.
The part numbers used to develop this application are shown in
Table 8
.
To use the on-board SPI EEPROM, mount the R3 resistor on the board.
Table 7. SPIRIT1 details
Features
Description
Order code
SPSGRF-868, SPSGRF-915
Package
SMD 11 pin
Operating voltage
1.8 to 3.6 V
Table 8. SPI EEPROM details
Features
Description
Order code
M95640-RMC6TG
Package
MLP8
Operating voltage
1.8 to 5.5 V
