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How is IRQ (interrupt) detected?

April 26, 2017detected interrupt IRQ

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How is IRQ (interrupt) detected?

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A1 IRQ is detected either of the following two ways. (1)Hardware: By connecting the IRQ pin to the INT pin of the host CPU. (2)Software: By detecting IRQ (flag of FLG register) via polling. Note, however, that in the case of (2), if the communication rate is fast or the amount of data to be communicated is large, IRQ detection may be missed. We therefore recommend using method (1).

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