可以将 CP2120 紧凑式 SPI 至 I2C 桥和通用端口扩展器轻松添加到系统，从而解决接口兼容问题，并在需要时添加更多 GPIO。CP2120 includes a four-wire slave SPI bus, bridge control logic, a bidirectional I2C bus interface, and eight general-purpose input/output (I/O) pins. A SPI master communicates with other I2C devices by instructing the CP2120 to send and receive I2C data traffic using the simple command set. CP2120 can act as a master-transmitter and a master-receiver on the I2C bus and handle all I2C timing, addressing, and arbitration.
