Pierre Gielen schreef:
>
> (problem: real time clock in NMS8255 is not running)
>
> > are u sure it's a 3.6 V battery and not a 2.4 V battery.
> > This problem also occurs when one of the 3 cells is defective
> > (a 3.6V battery is made of 3 X 1.2V )
>
> I've measured 3.0 V when the computer is off and 3.5 V when power is on.
> Maybe the battery is not fully charged yet, but it does rememeber all
> settings. After disconnecting the battery and switching the power on, the
> clock doesn't work either so I assume this is not the problem.
seems to be o.k. however 3.0V is a bit low , charge it for a few hours
and it must be 3.5 V when off . on pin 18 of the rtc must be 3 V when
off
and 5V when on . and on pin 2 must be 0v when off and 5 v when on.
>
> > if that's not the problem your Xtal may be damaged.
> > maybe you hit it when replacing the battery.
>
> Not likely, but I can give it a try. Only problem is that I can't read the
> part number or frequency on it. Can you tell me what it should be?
it's 32.768 Khz (very common type)
Erik de boer
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