CP212x SPI-to-I2C Bridge Device and GPIO Port Expander

The CP2120 compact SPI-to-I²C bridge and general purpose port expander device can be easily added to a system to solve interface compatibility problems and add more GPIO when required. 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.