Patent ID: 7088164

Claim:
A semiconductor integrated circuit device comprising: a clock generator that generates a clock signal for time-keeping even when main power to an electronic appliance is off; a drive control signal generator that generates a drive control signal for controlling a power supply circuit that supplies a supply voltage to a main controller that controls the electronic appliance as a whole; a state control signal generator that generates a state control signal for controlling an operation state of the main controller; and a timing controller that controls operation timing of a remaining part of the electronic appliance other than the main controller, wherein the drive control signal generator, the state control signal generator, and the timing controller are logic circuits that operate based on the clock signal from the clock generator, and wherein, when the main power to the electronic appliance is detected to be on, electric power is supplied to individual blocks of the electronic appliance and, when the main power to the electronic appliance is detected to be off, electric power is not supplied to the individual blocks of the electronic appliance.