Patent ID: 11924543
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 12:
13. A control method of an accessory detachably attached to an electronic apparatus, and communicable with an electronic apparatus by a first communication method as a communication via a first contact group, and by a second communication method as a communication via a second contact group different from the first contact group, the control method comprising the steps of:
controlling the communication by the second communication method based on information communicated by the first communication method,
executing, in the second communication method, in response to a change in a signal level of a signal via a first contact included in the second contact group from a first signal level to a second signal level, communication via a second contact included in the second contact group, and
executing communication by the second communication method based on information on the second signal level included in the information communicated by the first communication method.