STMicroelectronics STEVAL-BMS1T SPI to Isolated SPI Dongle

STMicroelectronics STEVAL-BMS1T SPI to Isolated SPI Dongle allows SPI signals to be converted into isolated SPI signals, thus decreasing the number of necessary wires from four to two. The ISOSPI protocol supplies differential communication to secure higher noise immunity and robustness for long-distance communications.

The STMicroelectronics STEVAL-BMS1T implements the L99BM1T general-purpose SPI to isolated SPI bidirectional transceiver, which can transfer communication data incoming from a standard 4-wire based SPI interface to a 2-wire isolated interface (and vice versa). The L99BM1T included on the STEVAL-BMS1T can be configured either as a slave or as a master of the SPI bus and supports any protocol of 8-to-64-bit SPI frames. When configured as a slave, the SPI peripheral can perform up to 10MHz. When the device is configured as a master, the SPI clock frequency can be programmed (250kHz, 1MHz, 4MHz, or 8MHz). The transceiver is initially compatible with the L99BM114 isolated SPI, permitting its usage in battery management system (BMS) applications. The basic BMS analog front-end node board is the STEVAL-BMS114. From the microcontroller side, the STEVAL-BMS1T board can be connected via SPI with SPI-enabled microcontrollers, particularly with STM32 microcontroller families.

Features

Hosts the L99BM1T general purpose SPI to isolated SPI bi-directional transceiver
Master/slave configuration through GPIOs or jumpers
Four configurable pins for the SPI protocol