Patent ID: 7765415

Claim:
A semiconductor integrated circuit having an internal circuit to which operation power is supplied or interrupted, and a power supply control circuit for controlling the supply and interruption of operation power to the internal circuit in accordance with an operation mode, wherein the power supply control circuit has a storage circuit and a power supply control sequence circuit, wherein the storage circuit inputs and holds switching instruction data for instructing switching between supply and interruption of the operation power and low-power-consumption-mode data determining an operation mode of the interruption of operation power and cancellation of the interruption, wherein the held switching instruction data and the low-power-consumption-mode data is initialized in response to a reset instruction from the outside, wherein the switching instruction data and the low-power-consumption-mode data initialized instructs supply of operation power to the internal circuit, and wherein the power supply control sequence circuit performs a control of transition between the interruption and supply of the operation power with reference to the switching instruction data and the low-power-consumption-mode data held in the storage circuit and, at the time of cancelling a state of interrupting the supply of operation power in response to the switching instruction data in the operation power supply interruption state according to the low-power-consumption-mode data, stops newly referring to the low-power-consumption mode data until an operation of the internal circuit to which the operation power is to be supplied is assured.