Large-scale integrated circuit (LSI) circuit for controlling electronic device including LSI, and method of controlling the circuit

摘要

There is provided an integrated circuit electrically connected to both a central processing unit and a memory, for controlling an electronic device, the integrated circuit including (a) a peripheral functional block operating under an operation mode the central processing unit indicated, (b) a communicator for communicating an internal signal to the peripheral functional block, (c) at least two registers capable of being initialized with a desired initial value stored in the memory in accordance with indications from the central processing unit, and (d) a switch receiving an external signal to select one of the registers, a signal being transmitted to the communicator through the thus selected register. The integrated circuit makes it no longer necessary to initialize registers when an operation mode is switched, unlike a conventional integrated circuit.