To provide an information processing apparatus, capable of preventing improper connections to the peripheral devices and peripheral devices for connecting to the processing apparatus, in an information processing apparatus, to which the peripheral devices can be electrically connected and the peripheral devices for connecting to the processing apparatus.

When the peripheral devices are electrically connected, the processing apparatus detects electrical connecting statuses to the peripheral devices and notifies the statuses, based on the results of detections of the statuses. At this time, it becomes possible to set circuits of the peripheral devices to predetermined connecting statuses from the processing apparatus.