Positive pulse format noise-filter and negative pulse format extension circuit for conditioning interrupt request signals
作者： John A. Landry , Dale J. Mayer
DOI:
关键词: Double fault 、 Interrupt handler 、 Interrupt latency 、 Computer science 、 Interrupt 、 Computer hardware 、 Filter (video) 、 Interrupt priority level 、 Programmable Interrupt Controller 、 Interrupt request
摘要: A computer system includes a filter at an interrupt request input for microprocessor system. The signal suppresses any positive pulse that is shorter than 9 cycles of the host clock. Only signals are asserted least 17 HCLK guaranteed passage to controller assert request. In addition, negative on IRQ latched and extended thus noise prevent unnecessary interrupts, provides enhanced detection levels rising edges negative-going signals.
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