Micro controller unit

A micro controller unit capable of controlling a power conversion device, comprising:

• an arithmetic processing unit that executes an arithmetic processing based on a program;
• a data storage unit that stores data used in the arithmetic processing;
• a peripheral circuit unit that outputs an event signal, which is a trigger for start of the arithmetic processing by the arithmetic processing unit, based on an operation state;
• and
• a data access control unit,
• wherein, when an instruction to access the data designated by a first address is received from the arithmetic processing unit, the data access control unit selectively executes, depending on the event signal input from the peripheral circuit unit:
• a processing of instructing the data storage unit to access data designated by the first address indicating a storage location of the data on the data storage unit;
• and
• a processing of processing of converting the first address and instructing the data storage unit to access data designated by a second address, which is associated with the first address and is different from the first address.