Cable and connection device

A cable connected between a first device and a second device, the cable comprising:

• a power line configured to supply a current from the first device to the second device;
• a current consumption unit configured to:
• receive the supply of the current from the first device through the power line, and
• adjust a signal quality interposed in a data line on a side of the first device;
• a detection unit configured to detect that the second device is in a first operating state;
• and
• a control unit configured to cancel a stop state of current consumption of the current consumption unit based on the detection that the second device is in the first operating state.