Method and system for extending interrupt sources and implementi

Details Method and system for extending interrupt sources and implementi Method and system for extending interrupt sources and implementi

1997-03-10

1999-07-20

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

710 8, 710128, 710260, 710266, 712 40, G06F 1324, G06F 1326

Patent

active

059251158

ABSTRACT:
The present invention comprises and interrupt controller for use with a programmable digital processor system. The interrupt controller of the present invention includes a plurality of interrupt blocks. The interrupt blocks are used for coupling to a corresponding plurality of peripheral devices. Each of the interrupt blocks are coupled to a data bus included within the interrupt controller. The interrupt controller also includes an interrupt control register. The interrupt control register is coupled to each of the interrupt blocks, and upon receiving an internal interrupt request from any of the interrupt blocks, asserts a processor interrupt request responsive to the internal interrupt request. The interrupt controller includes a processor interrupt request line adapted to couple to a programmable digital processor. The interrupt control register is coupled to the processor interrupt request line and asserts the processor interrupt request to an interrupt input of the programmable digital processor via the processor interrupt request line. The interrupt controller further includes an interrupt acknowledge line adapted to couple to the programmable digital processor. The interrupt acknowledge line is coupled to the input blocks to convey an interrupt acknowledge signal from the programmable digital processor to the interrupt blocks. The interrupt acknowledge signal is conveyed to the interrupt blocks such that each of the peripheral devices efficiently share the interrupt request input of the programmable digital processor.

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patent: 5727227 (1998-03-01), Schmidt et al.
patent: 5778236 (1998-07-01), Gephardt et al.
patent: 5778242 (1998-07-01), Wang

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