Patent ID: 7142140

Claim:
A system for monitoring interrupts to a processor, comprising: a multiplexer having a plurality of inputs connected to receive various analog inputs and an output, wherein a selected one of the plurality of inputs is connected to the output responsive to a control signal which output can result in the generation of an interrupt to the processor; an analog to digital converter connected to the output of the multiplexer for converting an analog signal at the output to a digital signal during a conversion cycle that occurs within a time slot; and an auto-scan block for generating the control signal provided to the multiplexer over a plurality of time slots, the control signal selecting ones of the plurality of inputs for connection to the output in a programmably defined order during each of the time slots, said auto scan block, at the end of a given time slot, initiating a change in the control signal to select another of the outputs and initiating a conversion cycle in the analog-to-digital converter.