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Batterie Voltage Control LPC2300

richard muller
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Hello, I'm using an LPC2368. The RTC is supplied by a battery. Is there a possability to check the battery voltage to generate an error for the customer? I don't want measure by AD Converter. Do you have a solution how can I do this with software?
thanks

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    The processor can't measure the battery. So you just need to connect the battery to an ADC - and having a FET that allows you to just connect the ADC when measuring, to avoid extra drain of the battery between measurements.

    Note that the LPC23xx chips are a bit hungry, in some cases stealing quite a lot of current from that RTC battery. See for example the chip errata.

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    The processor can't measure the battery. So you just need to connect the battery to an ADC - and having a FET that allows you to just connect the ADC when measuring, to avoid extra drain of the battery between measurements.

    Note that the LPC23xx chips are a bit hungry, in some cases stealing quite a lot of current from that RTC battery. See for example the chip errata.

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