| 摘要 |
An integrated circuit device including: a CPU which executes given processing based on an instruction code; an instruction code bus used to supply an instruction code to the CPU from a memory; and an instruction code supply line used to supply an instruction code output from a coprocessor to the CPU. The CPU includes: a fetch section which fetches an instruction code; and an instruction code select circuit which receives an instruction code input through the instruction code bus and an instruction code supplied through the instruction code supply line, and supplies one of the instruction codes to the fetch section.
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