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:
Nov. 30, 2010
Filed:
Dec. 22, 2006
Pasi Kolinummi, Kangasala, FI;
Klaus Melakari, Oulu, FI;
Marko Winblad, Oulu, FI;
Nokia Corporation, Espoo, FI;
Abstract
An integrated circuit comprises a processor, a controller and plural terminals. Each terminal constitutes a connection between the integrated circuit and a peripheral device. Each terminal is connected to a logic circuit on the integrated circuit by a respective IO cell in series connection with a respective IO isolation circuit and wherein the controller is operable on power up of the integrated circuit to activate a reset state and to release the reset state prior to releasing IO isolation by one or more of the IO isolation circuits. Each IO isolation circuit may be arranged so that a default state of the IO isolation circuit is a state in which the IO cell is isolated from the logic circuit. The IO isolation circuits may be controllable by software, for instance a driver for a peripheral device connected to the terminal associated with the IO isolation circuit. Plural IO isolation circuits may be connected so as to be commonly controllable by a single control signal from the controller.