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:
Apr. 03, 2012
Filed:
Feb. 01, 2008
Katsuhisa Ike, Hitachinaka, JP;
Katsuhisa Ike, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A data communications system having a plurality of processing devices connected to a serial via a serial bus interface. The processing device provides a communication control line which connects each processing device in order and performs the transfer of transmission right of the serial bus, a transmission right management unit which is connected to the communication control line, performs the transfer of the transmission right and manages the state of the transmission right within its own processing device, a data transmission unit which starts data transmission when the transmission right is valid and holds the data transmission when the transmission right is invalid, and a state initialization unit which sets the initial state of the transmission right so that the transmission right of only one processing device is made to be valid at the initialization.