STMicroelectronics – Wirless M-Bus stack for SPIRIT1 Sub 1GHz transceiver

For this stack ST provides a user manual available under the following link:

The SPIRIT1 device is a very low-power, high performance RF transceiver intended for RF wireless applications in the sub-1 GHz band. It is designed to operate at 169, 315, 433, 868, and 915 MHz frequencies, and supports the following modulations: 2-FSK, GFSK, MSK, OOK, and ASK. The air data rate is programmable from 1 to 500 kbps, depending on the selected modulation.

It has an integrated SMPS for very low power consumption: 9 mA in Rx and 21 mA in Tx mode at +11 dBm.
It uses a very small number of discrete external components and integrates a configurable baseband modem which supports data management, modulation and demodulation. Data management supports our proprietary, fully-programmable packet format, as well as the MBus standard compliance format (all performance classes).

The SPIRIT1 is the native HW supporting the low level of the WM-Bus PHY protocol.

Key Features:

•        Frequency bands: 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz
•        Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK
•        Air data rate from 1 to 500 kbps
•        Very low power consumption (9 mA RX and 21 mA TX at +11 dBm)
•        Programmable RX digital filter from 1 kHz to 800 kHz
•        Programmable channel spacing (12.5 kHz min.)
•        Excellent performance of receiver sensitivity (-118 dBm), selectivity, and blocking

•        Programmable output power up to +16 dBm
•        Fast startup and frequency synthesizer settling time (6 μs)
•        Frequency offset compensation
•        Integrated temperature sensor
•        Battery indicator and low battery detector
•        RX and TX FIFO buffer (96 bytes each)
•        Configurability via SPI interface
•        Automatic acknowledgment, retransmission, and timeout protocol engine
•        AES 128-bit encryption co-processor
•        Antenna diversity algorithm
•        Fully integrated ultra low power RC oscillator
•        Wake-up on internal timer and wake-up on external event
•        Flexible packet length with dynamic payload length
•        Sync word detection
•        Address check
•        Automatic CRC handling
•        FEC with interleaving
•        Digital RSSI output
•        Programmable carrier sense (CS) indicator
•        Automatic clear channel assessment (CCA) before transmitting (for listen-before-talk systems). Embedded CSMA/CA protocol

•        Programmable preamble quality indicator (PQI)
•        Link quality indication (LQI)
•        Whitening and de-whitening of data
•        Wireless M-BUS, EN 300 220, FCC CFR47 15 (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant

•        QFN20 4×4 mm RoHS package
•        Operating temperature range from -40 °C to 85 °C

See also

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