Semiconductor device and control method thereof

A control method of a semiconductor device, the semiconductor device comprising:

• a first memory that stores a plurality of instructions;
• a second memory that stores a plurality of data items;
• a first bus and a second bus;
• a microprocessor that fetches, through the first bus, an instruction at a specified address among the plurality of instructions stored in the first memory, executes the instruction, and accesses the second memory through the second bus based on a result of the execution;
• and
• a trace information output unit that outputs trace information,
• the method comprising:
• acquiring, when a branch instruction is generated in the microprocessor, address information of the first memory specified before branching, and outputting the information as the trace information;
• and
• writing the trace information output from the trace information output unit into the second memory through the second bus in a period in which the microprocessor does not access the second memory during execution of the branch instruction.