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'[PIC]: PIC Processor with several internal oscilla'
2007\02\14@164507 by Chris McSweeny

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The 12f683 does - I presume there must be others, but that's the one I have
knowledge of. A choice of 31kHz or 125kHz to 8MHz in 3dB steps. Not
something you can set with config bits though - you need to write to the
OSCCON register in software, and it will always start at 4MHz after a reset.

On 2/14/07, PAUL James <spam_OUTJames.PaulTakeThisOuTspamcolibrys.com> wrote:
{Quote hidden}

> -

2007\02\14@165459 by Marcel Birthelmer

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16F88 has an intosc that goes from about 32khz (RC) to 8MHz, using
configuration bits and the OSCCON register. I think this is identical
to most other parts, though a lot of them also don't go beyond 4MHz by
themselves.
- Marcel

On 2/14/07, Chris McSweeny <.....cpmcsweenyKILLspamspam@spam@gmail.com> wrote:
{Quote hidden}

2007\02\14@165528 by William Bross

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PAUL James wrote:

>All,
>
>It seems to me I have seen a PIC that has several internal RC Osc
>frequencies available just by giving the correct configuration bits.
>I seem to remember there being maybe 5 or 6 frequencies that started at
>30Khz and went to maybe 8 or 10 Mhz.
>But now for the life of me I can't seem to find it.   Does anyone here
>have any ideas as to a part like this?   Or am I halucinating?
>
>Someone let me know please.
>
>
>
>
>Thanks and Regards,
>
>
>Jim
>  
>
Jim,

The PIC16F690 and its associated series has the LFINTOSC that runs at
8mhz and has a postscaler to run it at 4/2/1mhz 500/250/125khz and
31khz.  If you do a site search and key off LFINTOSC you'll get the list
of processors that support this option.

Bill

2007\02\14@165904 by Jan-Erik Söderholm

face picon face
*Any* Nanowatt part.

Usualy 32 Khz -> 8 Mhz, sometimes including
16/32 Mhz when using the 4xPLL with the INTOSC...

Jan-Erik.




PAUL James skrev:
{Quote hidden}

2007\02\14@170422 by Marcel duchamp

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'f88's and associated family have this.

Chris McSweeny wrote:
> The 12f683 does - I presume there must be others, but that's the one I have
> knowledge of. A choice of 31kHz or 125kHz to 8MHz in 3dB steps. Not
> something you can set with config bits though - you need to write to the
> OSCCON register in software, and it will always start at 4MHz after a reset.
>
> On 2/14/07, PAUL James <.....James.PaulKILLspamspam.....colibrys.com> wrote:
>> All,
>>
>> It seems to me I have seen a PIC that has several internal RC Osc
>> frequencies available just by giving the correct configuration bits.
>> I seem to remember there being maybe 5 or 6 frequencies that started at
>> 30Khz and went to maybe 8 or 10 Mhz.
>> But now for the life of me I can't seem to find it.   Does anyone here
>> have any ideas as to a part like this?   Or am I halucinating?
>>
>> Someone let me know please.


2007\02\14@173127 by Jan-Erik Söderholm

face picon face
Why does everyone mention specific part numbers ?
Look for 8 Mhz intosc (or "nanowatt")in the
parametric search on http://www.microchip.com instead.

It would be a *lot* of posts if one would make
one post for each nanowatt device...

Regards,
Jan-Erik.

2007\02\14@182402 by Byron A Jeff

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On Wed, Feb 14, 2007 at 03:31:25PM -0600, PAUL James wrote:
> All,
>  
> It seems to me I have seen a PIC that has several internal RC Osc
> frequencies available just by giving the correct configuration bits.
> I seem to remember there being maybe 5 or 6 frequencies that started at
> 30Khz and went to maybe 8 or 10 Mhz.
> But now for the life of me I can't seem to find it.   Does anyone here
> have any ideas as to a part like this?   Or am I halucinating?
>  
> Someone let me know please.

You're lucid. That oscillator is part of Microchip's nanowatt package.

This microchip document outlines the facility:

http://ww1.microchip.com/downloads/en/devicedoc/30620a.pdf

The low end is 31.25 kHz. The high end is 8 MHz.

Parts such as the 16F88 and the new 16F887 utilize this package.

Hope this helps,

BAJ

2007\02\15@061413 by Jan-Erik Söderholm

face picon face
Byron A Jeff wrote :

> The low end is 31.25 kHz. The high end is 8 MHz.

High end is 16/32 Mhz on some of the newer PIC18
devices since the 4x PLL can also be used with
INTOSC in 4 and 8 Mhz mode (and not only with
the external crystal oscillator). Real nice...

Jan-Erik.

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