To ensure the reliability and safety in applications such as aeronautics, automotive, industrial automation, railway and space, several redundancy-based embedded architectures are used. In this work, the design of a 1oo4 safety System-on-Chip based on LEON3 processor with two different design approaches is presented. In both of the approaches, four LEON3 processors with a shared debug support unit, debug link and system peripherals are designed. However, one memory controller is interfaced with the system in the first approach while in the second approach four memory controllers are interfaced. Both the designs are implemented using the XUPV5-XC5VLX110T Xilinx development board (ML509). The performance of the system is verified in this work using the Xilinx ChipScope tool.