Access authorization device for controlling access requested by an OCDS module
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United States of America Patent
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Jul 27, 2004
Grant Date -
Aug 23, 2001
app pub date -
Feb 6, 2001
filing date -
Aug 6, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A program-controlled unit with an on-chip debug support (OCDS) module and a method for debugging a program-controlled unit fitted with the OCDS module by using an external debugger. The described program-controlled unit is characterized in that it includes an access authorization controller unit ensuring that read and/or write accesses to internal and/or external registers, storage and/or the like requested to the OCDS module by components that can be addressed by the OCDS module are executed only when the device requesting relevant access has proven its access authorization. This minimizes the danger of misusing the OCDS module in case of unlimited OCDS module performance.
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