Patent ID: 8166322
Filing Date: 2012-04-24
Classification: G06F,Y02D

Abstract:
1. A portable terminal device comprising: a CPU; a supplying unit configured to supply, to the CPU, an operating frequency of a clock signal used to operate the CPU; a setting unit configured to set one clock level out of a plurality of clock levels assigned with the operating frequency in accordance with an operating state of the CPU and to change the operating frequency stepwise at the clock levels to set the clock level of the operating frequency; a control unit configured to control the operating frequency supplied to the CPU at the clock levels based on the setting made by the setting unit; and an input accepting unit configured to accept any key input including key event which is irrelevant to an input of a command regarding the operating frequency of the CPU; wherein the setting unit determines whether a processing accompanying key event is generated and, when the setting unit determines that the processing accompanying key event is generated, the setting unit sets the clock level to a predetermined level irrespective of the operating state of the CPU.