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:
Sep. 06, 2011
Filed:
Mar. 23, 2009
Mittu Xavier Kocherry, Cherry Hinton, GB;
Simon John Craske, Cambridgeshire, GB;
Chiloda Ashan Senerath Pathirane, Haverhill, GB;
David Michael Gilday, Chatteris, GB;
Mittu Xavier Kocherry, Cherry Hinton, GB;
Simon John Craske, Cambridgeshire, GB;
Chiloda Ashan Senerath Pathirane, Haverhill, GB;
David Michael Gilday, Chatteris, GB;
ARM Limited, Cambridge, GB;
Abstract
Interrupt request detection circuitry is disclosed for detecting and outputting interrupt requests to a processor. The interrupt request detection circuitry comprises: an interrupt signal input for receiving an interrupt signal; an input for receiving a signal from the processor indicating whether the processor is currently processing an interrupt; a detection circuit for detecting an interrupt request and outputting an interrupt request signal to a data processing apparatus; disabling logic for disabling at least a portion of the detection circuitry; wherein in response to detecting the processor is currently processing an interrupt; the detection circuit is configured to detect a change in value of the interrupt signal caused by assertion of the interrupt signal indicating an interrupt request and to output an interrupt request signal to output circuitry in response to detecting the interrupt signal assertion; and in response to detecting the processor is not currently processing an interrupt; the disabling logic is configured to disable at least a portion of the detection circuit; and the detection circuit with the at least a portion disabled, is configured to output the interrupt signal as the interrupt request signal to the output circuitry.