A microprocessor is a single integrated circuit on which functions, such as arithmetic and control, are implemented. In recent years, microprocessors equipped with a CPU, memory, communication interfaces etc., have been widely used in smartphones, automobiles, electric devices, etc. The microprocessor is also an indispensable component for spacecraft and is a strategic part that strengthens their competitiveness. The Japan Aerospace Exploration Agency (JAXA) has positioned space-use microprocessors as key components of the space industry and has been proceeding with their development. The "next-generation space-grade microprocessor (next-generation MPU)" presented in this report is the successor to the current space grade microprocessor, developed by JAXA. Mitsubishi Heavy Industries, Ltd. (MHI), on the other hand, has successfully developed space-use microprocessor (SOI-SOC2), by applying our patents related to radiation tolerance enhancement. And due to such capabilities, MHI was selected by JAXA to lead the development of next-generation MPU as the manufacturer. As of fiscal 2021, the development of the prototype has been completed and the design and manufacture of the flight model is in progress.
