Patent attributes
The present invention provides a configuration capable of further suppressing power required for monitoring connection between devices. The device includes a controller capable of selecting an active state and a low power consumption state, and a switch device for controlling electrical connection/disconnection between an interrupt signal line and a bus in accordance with an output signal from the controller. In the low power consumption state, the controller returns to the active state when the potential appearing on the interrupt signal wiring substantially matches the potential of the bus, and after the return to the active state, provides the output signal to the switch device to electrically connect the interrupt signal wiring and the bus.
