System on a chip with an arbitration unit to grant right of access to a common resource in response to conflicting requests for access from initiator modules, and storage key incorporating the arbitration unit
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United States of America Patent
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Jun 10, 2008
Grant Date -
Nov 17, 2005
app pub date -
May 2, 2005
filing date -
May 3, 2004
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An electronic system comprises a defined number N of functional modules, including a defined number P of initiator modules and a defined number Q of target modules, where N, P and Q are integer numbers such that 2.ltoreq.P.ltoreq.N and 1.ltoreq.Q.ltoreq.N. In the event of a plurality of conflicting requests to access a common resource originating from a plurality of respective initiator modules, an arbitration unit grants an exclusive right of access to the resource to a defined one of these initiator modules. The arbitration unit is constructed either to apply a standard arbitration mechanism to these respective initiators, or to apply as a priority a specific arbitration mechanism only to the members of a subset of these initiator modules, for each of which it receives a linked privileged access signal.
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