Integrated circuits

Details Integrated circuits Integrated circuits

2006-12-22

2010-11-30

Tran, Anh Q (Department: 2819)

Electronic digital logic circuitry

Interface

C326S056000, C326S080000, C326S083000

Reexamination Certificate

active

07843220

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.

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“International Search Report and The Written Opinion of the International Searching Authority”, received in corresponding PCT Application No. PCT/IB2006/055022, Dated Sep. 21, 2007, 10 pages.

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