About the hardware resources of media signal processor, this paper especially analyze the collision′problems on the data bus of SDRAM,and put forward solutions about it .meanwhile it also make use of functions encapsulated in function storeroom of Blackfin DSP to realize the register configuration of CMOS image sensor and ADSP—BF533. the experimental results show that the program is more stabilization, the power consumption of DSP is lower ,and more saving transimission bandwidth of SDRAM. It satisfy the requriments of real—time image collection and coding system.