The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 14, 2017
Filed:
Dec. 22, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Kei Tohyama, Kawasaki, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An electronic apparatus capable of confirming connection between a body and an accessory without performing communication therebetween. When transmitting first data to the accessory in synchronism with a clock signal and receiving second data from the accessory in synchronism with the clock signal, the body can perform data communication selectively by the first or second communication method. A body microcomputer changes the level of the first data from high level to low, and then further changes the same from low to high in a state where the clock signal is at high in the first communication method. The microcomputer detects a change in level of the second data responsive to the change in level of the first data, and detects accessory connection and compatibility with the second communication method based on detection result.