AVR-Chat

Nope. This is a low dropout regulator, and there is plenty of battery voltage. The supply voltage to the chip IS (not "is supposed to be") 3.30V.
 


> -----Original Message-----
> From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
> Behalf Of greggy
> Sent: Thursday, September 15, 2011 3:36 PM
> To: AVR-Chat@yahoogroups.com
> Subject: [AVR-Chat] Re: Mega644 Brown Out Detector Problem
> 
> The regulator probably needs 1 - 1.5 volts head room, which your
> battery is not supplying. Just remove the regulator. Or use two
> batteries in series to push the voltage up.
> 
> --- In AVR-Chat@yahoogroups.com, Phillip Vogel <phillip@...> wrote:
> >
> >
> > I'm having what I hope is a minor problem. My circuit contains a
> mega644p powered by a lithium battery through a 3.3V regulator. There
> is a 12MHz crystal, and the CKDIV8 fuse is set, resulting in a clock
> speed of 1.5MHz.
> >
> > If I set the brown out detector to 2.7V, the chip never comes out of
> reset. It starts up OK if I set the BOD to off or 1.8V, but not 2.7V. I
> have checked the supply voltage, and it is, indeed, 3.30V.
> >
> > What am I missing here?
> >
> 
> 
> 
> 
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