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Interrupt

Pratik Mahajan

Hello guys, can I monitor interrupt0 of 8051 by any h/w means like by LED or something? I have connected RTC DS12887 IRQ to INT0 however I couldn't see logic 1 on DMM

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  • 0 in reply to Pratik Mahajan

    I don't need what you mean by "exclusively read".

    The chip can generate three different interrupts.

    How can you "service" an interrupt, unless you read the status register to check which interrupt source (or sources) that generated the interrupt?

    How do you expect the chip will know that you have "serviced" the interrupt if you have a one-way communication, i.e. you only let the interrupt line trig your ISR, but you do not perform any action to report back to the Dallas chip that it may deactivate the interrupt line?

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  • 0 in reply to Pratik Mahajan

    I don't need what you mean by "exclusively read".

    The chip can generate three different interrupts.

    How can you "service" an interrupt, unless you read the status register to check which interrupt source (or sources) that generated the interrupt?

    How do you expect the chip will know that you have "serviced" the interrupt if you have a one-way communication, i.e. you only let the interrupt line trig your ISR, but you do not perform any action to report back to the Dallas chip that it may deactivate the interrupt line?

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