The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 05, 2007
Filed:
Mar. 16, 2004
Conrado Blasco Allue, Austin, TX (US);
Paul Kimelman, Alamo, CA (US);
Andrew Brookfield Swaine, Cambridge, GB;
Richard Roy Grisenthwaite, Nr Royston, GB;
Conrado Blasco Allue, Austin, TX (US);
Paul Kimelman, Alamo, CA (US);
Andrew Brookfield Swaine, Cambridge, GB;
Richard Roy Grisenthwaite, Nr Royston, GB;
ARM Limited, Cambridge, GB;
Abstract
A system-on-chip integrated circuitis provided with multiple data processing circuitseach with an associated diagnostic interface circuitconnected via a diagnostic transaction busto a diagnostic transaction master circuit. The diagnostic master transaction circuitissues diagnostic transaction requests to the diagnostic interface circuits. If the associated data processing circuitsare powered-down, or otherwise non responsive, then the diagnostic interface circuitreturns a diagnostic bus transaction error signal to the diagnostic transaction master circuit. A sticky-bit latchwithin each diagnostic interface circuitserves to record a power-down event and force generation of the diagnostic bus transaction error signal until that sticky bit is cleared by the diagnostic mechanisms. This ensure the diagnostic mechanisms are made aware of the power-down event so they may take any appropriate remedial action that might be necessary as a result of that power-down event.