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:
Sep. 04, 2001
Filed:
Mar. 30, 1999
Method and apparatus for signal interfacing capable of infallibly notifying a status of an apparatus
Shunpei Tamaki, Hadano, JP;
Keizo Baba, Atsugi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An interfacing apparatus, connecting between a host system and a data processing device and including a parallel interface function for transmitting signals, includes an energy saving mode controller and an interface circuit controller. The energy saving mode controller selectively switches the apparatus into an energy saving mode from an idling mode. In the energy saving mode, the energy saving mode controller cuts off power for driving an interface circuit, except for a minimal power required to be supplied to at least one predefined portion of the interface circuit. The interface circuit controller notifies the host system of statuses of the interface apparatus using at least one status signal line. After having entered the energy saving mode, the interface circuit controller maintains the at least one logic level signal line at a status which is reversed from a usual logic level thereof in the idling mode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile