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Interrupt

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 ImPer Westermark over 17 years ago in reply to Pratik Mahajan

The interrupt output is open-drain, i.e. it will basically tristate when not signaling an interrupt. Have you remembered to connect a pull-up resistor?
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0 ImPer Westermark over 17 years ago in reply to Pratik Mahajan

The interrupt output is open-drain, i.e. it will basically tristate when not signaling an interrupt. Have you remembered to connect a pull-up resistor?
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