Patent ID: 8677036

Claim:
A power control device coupled to a power supply device and an information processing device, and configured to control a power supply from the power supply device to the information processing device, the power control device comprising: a first input/output unit configured to input/output data from/to the information processing device; a second input/output unit configured to input/output data from/to the power supply device by a change of state of signal lines; a storage unit configured to store data input from the first input/output unit and the second input/output unit; and a control unit configured to execute a conversion process for converting data input from the first input/output unit to a change of state of a signal line that can be output from the second input/output unit, and converting a change of state of a signal line input from the second input/output unit to a data format that can be output from the first input/output unit, wherein the control unit determines an output destination of input data input from the first input/output unit, outputs the input data to the second input/output unit or the storage unit depending on a determination result, and adds a flag to output data output from the first input/output unit, the flag indicating which of the second input/output unit and the storage unit is an output source of the output data.