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:
Aug. 30, 2011
Filed:
Mar. 01, 2004
Hedley James Francis, Newmarket, GB;
Hedley James Francis, Newmarket, GB;
ARM Limited, Cambridge, GB;
Abstract
A data processing apparatus and method for handling interrupts is provided, the apparatus having an interrupt controller operable to receive interrupts generated by a number of interrupt sources, and to determine based on predetermined criteria whether to output an interrupt request signal. A processing unit is provided which is operable upon receipt of the interrupt request signal to perform an interrupt service routine for a selected one of the received interrupts in order to generate an interrupt response for the corresponding interrupt source. Timer logic is also provided which is operable upon receipt of an interrupt generated by an associated interrupt source to produce a timing indication. As a result of this, the processing unit is operable, when performing the interrupt service routine for the interrupt generated by that associated interrupt source, to reference the timer logic in order to obtain the timing indication, and to control a predetermined aspect of the interrupt response in dependence on the timing indication. This has been found to provide a significantly improved technique for handling interrupts from interrupt sources which desire deterministic behavior with regards to the interrupt response.