Design of CMOS Image Sensor´s Initialization Based on FPGA

CMOS image sensor can convert analog video signals into digital video signals, so the initialization of CMOS image sensor is essential to image capture and processing system. This paper briefly introduces the specification of I²C bus and working principle of COMS image sensor, then it detailedly presents a new design of I²C bus controller which can initialize CMOS image sensor. The I²C bus controller programmed by Verilog hardware description language based on FPGA has three function modules. According to the given block diagram of the I²C bus controller, this paper focuses on analyzing the designing thought of each module and the transform process of the I²C bus state. Finally, the function of Controller is verified according to the simulation test and the initialization of CMOS Image Sensor is implemented through the hardware circuit successfully.