Fourthly,on the ground of studing of UART IP and I~2C bus controller IP,the whole progress of wrapping two IPs are shown in the paper and the criteria of wrapping IPs as slave device of APB is put forward.

• 在对UART和I~2C总线控制器IP核研究的基础上,详述了基于AMBA APB总线的IP核封装过程,提出基于APB总线从设备的IP核封装规范。