MOBILE INFORMATION PROCESSING DEVICE POWER SAVING METHOD AND MOBILE INFORMATION PROCESSING SYSTEM

摘要

When an external device (4) receiving power from a mobile information processing device (1) is connected to the mobile information processing device (1), power saving of the mobile information processing device (1) including the external device (4) is realized. An operation mode based on a power state of the external device (2) is set in the mobile information processing device (1) and the set operation mode is notified to the external device (4) according to the power state. Accordingly, it is possible to select the operation mode of the external device according to a power state desired by a user. Moreover, when the external device (4) performs data processing in response to request from the mobile information processing device (1), the processing is continued until it is completed even if the operation mode modification is notified. Thus, it is possible to modify the operation mode without disturbing the operation in the external device, thereby realizing operation with low power consumption including the external device.