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:
Oct. 13, 1998
Filed:
Dec. 29, 1995
King Seng Hu, Penang, MY;
Intel Corporation, Santa Clara, CA (US);
Abstract
An interrupt handler unit (IHU) for polling and arbitrating among interrupt sources and for generating a request for interrupt to a processor if winning priority is higher than an in-progress priority. The interrupt handler unit, upon acknowledgment by the processor, generates a vector address on an interface bus and at the same time pushes an acknowledged priority onto an in-progress priority (IPP) stack. The interrupt acknowledge is then provided to the appropriate interrupt source for the source to clear a pending flag. Upon a return from interrupt (RETI) instruction, the in-progress priority (IPP) stack is popped by the interrupt handler unit. The interrupt channels are time multiplexed based on interrupt state signals, and the individual interrupt sources can be masked. Interrupt related registers, (such as enable, priority, and flag) reside in the interrupt handler unit. The priority of an individual interrupt source is programmable using an interrupt priority registers, which are also provided in the IHU.