Design of General Synchronous Serial Interface Circuit

A synchronous serial interface circuit of slave is designed on the basis of I2C bus and SPI bus protocol. The circuit is compatible with I2C bus and SPI bus protocol and it is focused on the application in sensor. The interface circuit's structure and modularization,timing,Verilog- HDL design and implementation are introduced in this paper. Simulation results of the circuit are also presented. Test results show the proposed interface circuit can transmit data with master through I2C and SPI bus. The circuit can meet the communication need of the sensor systems in Internet of Things.