Interrupt control method for controlling an interrupt from a per

Details Interrupt control method for controlling an interrupt from a per Interrupt control method for controlling an interrupt from a per

1997-08-04

1999-12-14

Auve, Glenn A.

395870, 395742, G06F 946

Patent

active

060028777

ABSTRACT:
A method for controlling an interrupt from a peripheral device to a processor, the peripheral device including at least an interrupt control unit, an interrupt request level holding unit, and an interrupt vector holding unit, which includes the steps of: a) updating the contents of the interrupt request level holding unit in accordance with commands in a software sent from an external device, for example, a subprocessor; b) updating the contents of the interrupt vector holding unit in accordance with commands in the software sent from the external device; c) reading an interrupt request level from the interrupt request level holding unit to the interrupt control unit; d) issuing the interrupt request level from the interrupt control unit to the processor when the peripheral device performs the interrupt operation; e) performing various processes and asserting the results of the signal processes from the processor to the peripheral device; f) reading an interrupt vector from the interrupt vector holding unit to the interrupt control unit, and setting a vector number to lower byte of data to assert data and a size acknowledgment; g) notifying the interrupt vector from the interrupt control unit to the processor; i) latching the vector number and negating address and data strobes in the processor; k) negating the data and the size acknowledge in the interrupt control unit; and l) starting the next cycle of the interrupt operation in said processor.

REFERENCES:
patent: 5287523 (1994-02-01), Allison et al.
patent: 5448743 (1995-09-01), Gulick et al.
patent: 5471620 (1995-11-01), Shimizu et al.
patent: 5481725 (1996-01-01), Jayakumar et al.

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