Andrej,
thank you very much for this suggestions!
Obviously, you are talking about 16F62x, not 16F84..
At the moment I must use the 2.nd (I have about 10 ~15  'F84), but I will
start also in developement
with 'F628, if my programmer can manage it.

bye
Marco



----- Original Message -----
From: "Andy Jancura" <andy_jancura@HOTMAIL.COM>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: 8 febbraio, 2002 14.56
Subject: Re: [EE]: 16F84 Datalogger - current consumption


> Hello Marco,
>
> >The only doubt I have, using a 32 Khz unit, is a lowered capability in
> >frequency measure: or I'm wrong?
> >
> >Bye
> >Marco
>
> My ideas were:
>
> 1) you have two crystals 4MHz and 32KHz. First for measure-task, second
for
> counting the time in sleep mode with timer1 and wake-up from sleep. MCU
runs
> on 4MHz allways except in sleep.
>
> 2) principe is the same as in one, but you use internal RC for clock
> generation, so no external components are needed. The speed control bit
> changes the frequency into MCU to 4MHz in measure-task and before entering
> sleep it slows down to 37kHz and reduces power consuption. This mode is
> exactly what your application needs.
>
> More details are in datasheet.
>
> Andrej
>
>
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