Aiming at the problems in use of foreign soft processor core

such as high license fees need to be paid

hardware description language（ HDL） source code files are not provided

system based on soft processor core can not be configured flexibly

technical support provided is limited

micro architecture and features of Loongson soft processor core LS232 are researched

and the field programmable gate array（ FPGA） is used for hardware platform is proposed

and an improved system on chip（ SoC） based on LS232 is designed and implemented. Also

the boot program PMON is succeeded installed to run on the SoC

and the light real-time operating system Linux is ported on the system and run steadily. The whole So C can be used for embedded system

and it runs at 68 MHz. The system has characteristics of strong real-time and high performance

and it can meet the needs of security and reliability of embedded processors in the aerospace field.