| 摘要 |
The present invention provides a low-cost semiconductor integrated circuit on which two CPUs are mounted. The semiconductor integrated circuit integrated in a single chip includes a standby microcomputer, a main microcomputer, and a block circuit which blocks a signal between both microcomputers. The standby microcomputer includes a first Read Only Memory (ROM) which stores a first boot program and a first processing unit which executes the first boot program. The main microcomputer includes a second ROM which stores a second boot program and a second processing unit which executes the second boot program. The first processing unit executes the first boot program when the first power source is switched ON, while the second processing unit executes the second boot program when the second power source is switched ON.
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