Patent ID: 8826053

Claim:
A coordination operation method, in which a host section for performing processing relating to communication with an external section, and an engine section for executing applications using at least one of a display output section and an audio output section under management by the host section, are operated in a coordinated fashion in a mobile communication terminal, comprising the steps of: transmitting an engine processor program, stored in non-volatile storage means connected to a host processor of the host section, for execution in an engine processor of the engine section, from the host section to the engine section; storing the engine processor program received by the engine section into a volatile engine memory means connected to the engine processor; executing an instruction of a specified program, one of the engine processor program, transmitted from the host section, stored in the engine memory means; executing the specified program using the engine storage means, in the engine section that has received the execution instruction of the specified program; selecting a host display image signal from the host section or an engine display image signal from the engine section; supplying the selected image signal to a main display section, said selecting and supplying being performed by a display output selection section in the engine processor; and controlling supply of a first operating power to the engine processor and a second operating power to the volatile engine memory means independently, said controlling being performed in dependence upon one or more control signals from the host section, wherein the main display section is controlled by the engine section in an engine mode during an application operation state and is controlled by the host section in a host mode during an idle state, wherein the selecting by the display output selection section is performed in dependence upon a designation by a host output control signal from the host section and an engine output control signal from the engine section; wherein when priority display of a host image is designated by the host output control signal, the display output selection section selects the host display image signal and outputs it as the selected image signal regardless of designation by the engine output control signal; wherein when priority display of a host image is not designated by the host output control signal, the display output selection section selects one of the host display image signal and the engine display image signal for output as the selected image signal in dependence upon designation by the engine output control signal.