Image capturing apparatus, accessory apparatus, and control method therefor
AssigneeCanon Kabushiki Kaisha
InventorsTomoki Tanaka, Hideya Takanashi
Life of this patent
Estimating the term…
Abstract
A camera microcomputer receives first accessory attribute information of the accessory attribute information through the third communication channel by using a first communication method and then switches from the first communication method to a second communication method different from the first communication method, and controls communication so as to receive second accessory attribute information of the accessory attribute information through the third communication channel by using the second communication method.
Claims1
An image capturing apparatus to which an accessory apparatus is attachable, the image capturing apparatus comprising:
- a communication control section that controls transmission of a signal to the accessory apparatus through a first communication channel, transmission of data to the accessory apparatus through a third communication channel, and reception of data from the accessory apparatus through a second communication channel, and controls reception of accessory attribute information of the accessory apparatus through the second communication channel, wherein the communication control section controls communication so as to receive first accessory attribute information of the accessory attribute information through the second communication channel by using a first communication method, then switches from the first communication method to a second communication method different from the first communication method, and receives second accessory attribute information of the accessory attribute information through the second communication channel by using the second communication method,
- the first communication method is a communication method in which, at a timing corresponding to transmission, through the first communication channel, of a clock signal of which a signal level switches alternately between a first signal level and a second level different from the first signal level, transmission of data through the third communication channel and reception of data through the second communication channel are performed,
- the second communication method is a communication method in which, in response to reception, through the second communication channel, of data transmitted in response to switching of the signal level of the first communication channel from the first signal level to the second signal level, transmission of data is performed through the third communication channel, and
- the communication control section is implemented by at least one processor or circuitry, or combination thereof.
Dependencies are inferred from the claim text.