Searching \ for '[PIC]: Is it possible?' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: www.piclist.com/techref/microchip/devices.htm?key=pic
Search entire site for: 'Is it possible?'.

Exact match. Not showing close matches.
PICList Thread
'[PIC]: Is it possible?'
2001\12\23@080053 by Tal Bejerano - AMC

flavicon
face
Hi all

Is it possible that 16F84 will work without a crystal, and only with a
resistor and a capacitor
clocking the OSC1 with OCS2 disconnected?

I found a design that use this method - can it be?

Tal

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\12\23@080713 by uter van ooijen & floortje hanneman

picon face
> Is it possible that 16F84 will work without a crystal, and only with a
> resistor and a capacitor
> clocking the OSC1 with OCS2 disconnected?

RTFM? It is called RC oscillator mode. Cheap and reliable, but not very
accurate. Some PICs even haven the R+C on chip.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal
PICs kopen? http://www.voti.nl/shop

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\12\23@083458 by Tal Bejerano - AMC

flavicon
face
What was bother me is the accuracy Wouter, that what I mean.
Thanks Anyway :-)

Tal

-----Original Message-----
From: pic microcontroller discussion list
[spam_OUTPICLISTTakeThisOuTspamMITVMA.MIT.EDU]On Behalf Of wouter van ooijen & floortje
hanneman
Sent: Sunday, December 23, 2001 12:06 PM
To: .....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU
Subject: Re: [PIC]: Is it possible?


> Is it possible that 16F84 will work without a crystal, and only with a
> resistor and a capacitor
> clocking the OSC1 with OCS2 disconnected?

RTFM? It is called RC oscillator mode. Cheap and reliable, but not very
accurate. Some PICs even haven the R+C on chip.

Wouter van Ooijen

Van Ooijen Technische Informatica: http://www.voti.nl
Jal compiler for PIC uC's:  http://www.voti.nl/jal
PICs kopen? http://www.voti.nl/shop

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\12\23@090031 by uter van ooijen & floortje hanneman

picon face
> What was bother me is the accuracy Wouter, that what I mean.
> Thanks Anyway :-)

There are graphs in the datasheet. For absolute accuracy the tolerance of
the C (10%?) will have a big influence. Over the temperature range the PIC
has a big influenece. If you can live with an accuracy 20% or so an external
RC is a good (and cheap) idea.

Wouter

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads


2001\12\23@133325 by Rudy Rudy

flavicon
face
Tal,

Get 16F628 (Internal RC oscillator, better, more RAM, more programmable
memory, and to top it all, it's cheaper).  I tried using the internal RC
oscillator, and find that it's pretty accurate.  I, however, never tried it
across huge temperature range.


Rudy

{Original Message removed}

2001\12\23@173659 by andy n1yew

picon face
Yes, you can use that.

If you had looked at the data sheet, you would have seen that this is called
RC oscillator mode.

Andy
{Original Message removed}

More... (looser matching)
- Last day of these posts
- In 2001 , 2002 only
- Today
- New search...