Stmicroelectronics S.a.

Stéphane Audrain

Alain Artieri

Jacques Dumarest

Vincent Lefftz

Frederic Robin

Systems and methods are provided for processing different concurrent tasks by a subsystem managed by a central processor. Each tasks is comprised of successive messages including a first message, intermediate messages, and a last message. Each intermediate message comprises a subtask parameter and a link to the next message that indicates the time when the next message is to be processed. The central processor and the subsystem are connected to a storage memory and several counters associated with respective tasks. The system and method reduce task disruptions of the system.

Method of executing concurrent tasks by a subsystem managed by a central processor

An electronic device for data processing may include p synchronous processor cores each respectively clocked by one of p clock signals all having a same period T and being phase-shifted by 2&#x3c0;/p relative to one other. The electronic device may further include a single access shared memory with an access time less than or equal to T/p. The memory may be clocked by an access signal with a period T/p and that is synchronous with the clock signals. The processors cores may sequentially and cyclically access the memory at consecutive intervals spaced apart in time with a period equal to T/p. The electronic device is particularly well suited for use in audio processors of digital versatile disk (DVD) decoders, for example.

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Grenoble, France

Stéphane Audrain