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US 7,843,220 B2Granted
Integrated circuits
AssigneeNokia Corporation
InventorsPasi Kolinummi, Klaus Melakari, Marko Winblad
Life of this patent
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AssigneeNokia Corporation
InventorsPasi Kolinummi, Klaus Melakari, Marko Winblad
Estimating the term…
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.
An apparatus comprising a processor, a controller and plural terminals, each terminal comprising a connection between the apparatus and a peripheral device,
A method of operating an integrated circuit comprising a processor, a controller and plural terminals, each terminal comprising a connection between the integrated circuit and a peripheral device, wherein each terminal interfaces to a logic circuit on the integrated circuit by a respective input/output IO cell in series connection with a respective IO isolation circuit, the method comprising, on power up of the integrated circuit:
A memory storing machine readable instructions, which when executed by computing apparatus control it to perform a method of operating an integrated circuit comprising a processor, a controller and plural terminals, each terminal comprising a connection between the integrated circuit and a peripheral device, wherein each terminal interfaces to a logic circuit on the integrated circuit by a respective input/output IO cell in series connection with a respective IO isolation circuit,
Dependencies are inferred from the claim text.