AVR-Chat

Sorry guys, It was a Timer initialization problem, nothing 
related to the Power-On Reset.  My bad...

	Thanks for your help!

	Mark Jordan

On 23 Oct 2004 at 11:01, Larry Barello wrote:

> 
> Putting a capacitor and resistor on the reset line is archaic and doesn't do
> anything to improve the performance of the AVR chip.  Period.  It comes from
> the "classic" AVR days - and even then it was useless.  You need a proper
> external reset chip for those processors.  Any of the mega or tiny series
> processors has a built in BOD circuit which (IMHO) renders all the external
> doodads pointless.
> 
> My recommendation: take off the R-C, enable the BOD (that is separate from
> setting the voltage), and set your fuses for the maximum delay (64ms).
> 
> -----Original Message-----
> ...
> >
> >         I'm having a weird problem with a Mega8 running on the
> >internal clock oscilator at 1 MHz. The internal Power-on Reset
> >seems not to be working.
> >         Every time I power up the circuit, I have to manually reset
> >the Mega8. The power at the Vcc pin rises from 0 to +5V in 4mS.
> >The RESET pin has a 22k to +5V and 4.7uF to GND.
> >         Have tried several fuses combinations but no luck.
> >         Am I missing something?
> >
> >         Thanks.
> >         Mark Jordan
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