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How is the Dialer I/O interrupt setup?

April 26, 2017Dialer interrupt Setup

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How is the Dialer I/O interrupt setup?

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• Set the master interrupt flag EMI ([0Bh].0) and Dialer I/O interrupt master flag EDRI ([1Eh].2) to 1. • Three Dialer I/O pins will influence the interrupts: HKS, HDI and HFI. Changes when the HKS occurs Falling or Rising edge, the HDI occurs Falling edge and HFI occurs Rising edge will all cause interrupts. The Dialer I/O interrupt vector is 18h. • When the Dialer I/O is in On-Hook or Hold-Line state, a falling edge on HDI pin will not trigger the interrupt.