STMicroelectronics – Wirless M-Bus stack for SPIRIT1 Sub 1GHz transceiver
For this stack ST provides a user manual available under the following link:
http://www.st.com/st-web-ui/static/active/en/resource/technical/document/user_manual/DM00115100.pdf
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
