STMICROELECTRONICS STEVAL-BMS1T Evaluation Board, L99BM1T-TR, Dongle, SPI to Isolated SPI Transceiver

STEVAL-BMS1T is a SPI to isolated SPI dongle based on the L99BM1T transceiver. allows converting SPI signals into isolated SPI signals, thus reducing the number of necessary wires from 4 to 2. The ISOSPI protocol features differential communication to ensure higher noise immunity and robustness for long-distance communications. The STEVAL-BMS1T is based on the L99BM1T general-purpose SPI to isolated SPI bidirectional transceiver, which can transfer communication data incoming from a classical 4-wire based SPI interface to a 2-wire isolated interface (and vice versa). The L99BM1T hosted on the STEVAL-BMS1T can be configured either as a server or as a host of the SPI bus and supports any protocol of 8-to-64-bit SPI frames. The SPI peripheral can work up to 1MHz when configured as a server. The SPI clock frequency can be programmed (250kHz, 1MHz, 4MHz, or 8MHz) when the device is configured as a host. The transceiver is natively compatible with the L99BM114 isolated SPI.

• Hosts the L99BM1T general purpose SPI to isolated SPI bi-directional transceiver
• Host/server configuration through GPIOs or jumpers
• 4 configurable pins for the SPI protocol
• 2 configurable pins for amplitude and frequency of the converted signal (ISOSPI)
• Dimension is 85mm x 30mm