Interrupt controller with external in-service indication for pow

Details Interrupt controller with external in-service indication for pow Interrupt controller with external in-service indication for pow

1993-09-22

1999-04-13

Ray, Gopal C.

395736, 395737, 39575004, G06F 946, G06F 132

Patent

active

058945776

ABSTRACT:
An interrupt controller includes an interrupt request register for receiving interrupt requests from various peripherals or I/O devices via a set of request lines. A priority resolver is further provided for comparing the priority level of the interrupt lines, latching the lower priority requests in a stand-by mode, and directing servicing of the highest priority level. An in-service register is provided for storing the identification of any request line that is being serviced by the microprocessor. In one embodiment, a set of signal lines are coupled between the in-service register and external terminals of the integrated circuit on which the interrupt controller is fabricated. A power management unit may be coupled to the external pins of the integrated circuit and thereby receives real-time information regarding an interrupt request that is currently being serviced and regarding interrupt service routines that have completed. Using this information, the power management unit advantageously stops unused clock signals and/or removes power from inactive circuit portions when an interrupt routine completes without having to estimate the time of completion. By accurately stopping unused clock signals and removing power, a reduction in the overall power consumption of the computer system can be attained.

REFERENCES:
patent: 3905025 (1975-09-01), Davis et al.
patent: 4615005 (1986-09-01), Maejima
patent: 4851987 (1989-07-01), Day
patent: 5101497 (1992-03-01), Culley et al.
patent: 5167024 (1992-11-01), Smith et al.
patent: 5214767 (1993-05-01), Wannet et al.
patent: 5218703 (1993-06-01), Fleck et al.
patent: 5237692 (1993-08-01), Raasch et al.
patent: 5283904 (1994-02-01), Carson et al.
patent: 5349667 (1994-09-01), Kaneko et al.
patent: 5392435 (1995-02-01), Masui et al.
patent: 5410708 (1995-04-01), Miyamori

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