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. 14, 1999
Filed:
Sep. 24, 1997
Takehiko Hojo, Kanagawa-ken, JP;
Motohiro Enkaku, Kanagawa-ken, JP;
Kabushiki Kaisha Toshiba, , JP;
Abstract
An I/O circuit is capable of achieving a reduction of power consumption by preventing leak current while performing the pull-down or pull-up operation. The I/O circuit of the present invention is constructed so that an I/O terminal 5 is pulled down or pulled up only when the I/O terminal 5 is in an open state or at the same potential as the pull-down or pull-up potential provided to the I/O terminal 5 when the high impedance state is input to the I/O terminal 5. The I/O circuit comprises an output circuit providing tri-state outputs, a switch circuit for the pull-up or pull-down operation, and an input circuit connected to the I/O terminal, the switch circuit and internal circuits of a device.