Filter
Top Products
2-22 Functional Description
consecutive reads to ensure that the interrupts clear properly. Both
the SCSI and DMA interrupt conditions should be handled before
leaving the ISR. It is recommended that the DMA interrupt is
serviced before the SCSI interrupt, because a serious DMA interrupt
condition could influence how the SCSI interrupt is acted upon.
6. When using polled interrupts, go back to Step 1 before leaving the
ISR, in case any stacked interrupts moved in when the first interrupt
was cleared. When using hardware interrupts, the IRQ/ pin will be
asserted again if there are any stacked interrupts. This should cause
the system to re-enter the ISR.