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Re: RE: [AVR-Chat] sleep mode in mega16

Re: RE: [AVR-Chat] sleep mode in mega16

2004-04-05 by erikc

----- Original Message -----
Show quoted textHide quoted text
From: "jay marante" <jaythesis@yahoo.com>
To: <Avr-chat@yahoogroups.com>
Sent: Monday, April 05, 2004 18:27
Subject: Fwd: RE: [AVR-Chat] sleep mode in mega16


>
> --- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> > I think it only consumes a small amount current
> since
> > i only an LCD and a keypad. Whats a DC-DC convrtr?
> Any
> > particular device i can order?

DC-DC convertor is another term for switch-mode power
supply.

Numerous companies make switch mode power supply chips, off
the top of my head, Texas Instruments, National
Semiconductor, Linear Technology, Phillips, and Thompson,
for starters.  I'm familiar with Linear Technology, and have
used these parts in the past:

http://www.linear.com/pdf/lt1305.pdf  This part will boost 3
volts to 5 volts using the circuits shown.

http://www.linear.com/pdf/1174fds.pdf This part, depending
on how you connect it, will raise 3 volts to 5 volts or
lower 9 volts to 5 volts without great loss (no where near
as much as a linear regulator).  In addition, it has a
shutdown control which effectively turns the device
completely "off" (less than 10uA leakage current), and a low
battery indicator.  There is one intersting circuit that
produces both +5 and -5 volts from the same 9 volt battery.

Lots of application circuits are shown, in some cases with
exact partnumbers and vendor names.



www.linear.com  (home page)


Erikc  - firewevr@airmail.net
///
"An Fhirinne in aghaidh an tSaoil."
"The Truth against the World."
        -- Bardic Motto

Fwd: RE: [AVR-Chat] sleep mode in mega16

2004-04-05 by jay marante

--- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> I think it only consumes a small amount current
since
> i only an LCD and a keypad. Whats a DC-DC convrtr?
Any
> particular device i can order?
> --- yahoo@barello.net <yahoo@barello.net> wrote:
> > The mega16 in max power mode consumes only 40ma. 
> Simply putting it into
> > IDLE mode between interrupts will drop the
> consumption to 5 or so ma.  If
> > you circuit is drawing 250ma then the vast bulk of
> the current draw is from
> > something OTHER than the CPU.
> > 
> > Read about the sleep modes in the data sheet.  You
> set two bits in the MCUCR
> > and then execute the "sleep" instruction. 
> Interrupts will bring you out of
> > the sleep.  Turning off peripherals (Analog
> comparator, ADC) will save you
> > about 1ma max, if even that.
> > 
> > 
> > -----Original Message-----
> > From: jay marante [mailto:jaythesis@yahoo.com]
> > Sent: Monday, April 05, 2004 7:38 AM
> > To: AVR-Chat@yahoogroups.com
> > Subject: Re: [AVR-Chat] sleep mode in mega16
> > 
> > 
> > im using max883 as a linear regulator. its output
is
> about 200-250mA of
> > current.
> > 
> > how will i code the power-save mode in ICCAVR?
> > 
> > thanks.
> > 
> > -jay
> > 
> > David VanHorn <dvanhorn@cedar.net> wrote:
> >   At 06:56 AM 4/5/2004 -0700, jay marante wrote:
> > 
> >   >Hi!
> >   >
> >   >I want to put the mega16 in a power-save mode
but
> i cant get it done. anu
> > sample C codes? i want it so badly coz my system
> comsumes so much power from
> > the 9V battery. i think it wont even last a day.
> > 
> > 
> >   First off, how are you doing your voltage
> regulation?
> >   When moderate currents are flowing, switchers
are
> more efficient.
> >   When the current is very small, linear regs win.
> > 
> > 
> >   On sleeping, you need to set your external I/O
up
> to the appropriate
> > states (only you can figure that) and then worry
> about the processor.
> > 
> >   Turning off timers that you don't need, shutting
> down analog ref and A/D.
> > In the M128, you can program the Xdiv register to
> slow the clock down quite
> > a lot.  In all the megas, you can program the
CKOPT
> fuse to use the Vittoz
> > oscillator, but you'd better do some careful
design
> there, to avoid
> > problems.
> > 
> >   Of course you need a mechanism to come out of
low
> power mode, like an
> > interrupt, or ... ?
> > 
> > 
> > 
> > 
> >
=== Message Truncated === 


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Re: RE: [AVR-Chat] sleep mode in mega16

2004-04-06 by jay marante

can i order a free sample from linear technology?
 
the system only consumes a small amount of current since im only connec a 4x20 LCD. but later i'll connect a motor to the system. so for now, i think it only comsumes a small amount of current.
 
-jay

erikc <firewevr@airmail.net> wrote:
Show quoted textHide quoted text
----- Original Message -----
From: "jay marante" <jaythesis@yahoo.com>
To: <Avr-chat@yahoogroups.com>
Sent: Monday, April 05, 2004 18:27
Subject: Fwd: RE: [AVR-Chat] sleep mode in mega16


>
> --- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> > I think it only consumes a small amount current
> since
> > i only an LCD and a keypad. Whats a DC-DC convrtr?
> Any
> > particular device i can order?

DC-DC convertor is another term for switch-mode power
supply.

Numerous companies make switch mode power supply chips, off
the top of my head, Texas Instruments, National
Semiconductor, Linear Technology, Phillips, and Thompson,
for starters.  I'm familiar with Linear Technology, and have
used these parts in the past:

http://www.linear.com/pdf/lt1305.pdf  This part will boost 3
volts to 5 volts using the circuits shown.

http://www.linear.com/pdf/1174fds.pdf This part, depending
on how you connect it, will raise 3 volts to 5 volts or
lower 9 volts to 5 volts without great loss (no where near
as much as a linear regulator).  In addition, it has a
shutdown control which effectively turns the device
completely "off" (less than 10uA leakage current), and a low
battery indicator.  There is one intersting circuit that
produces both +5 and -5 volts from the same 9 volt battery.

Lots of application circuits are shown, in some cases with
exact partnumbers and vendor names.



www.linear.com  (home page)


Erikc  - firewevr@airmail.net
///
"An Fhirinne in aghaidh an tSaoil."
"The Truth against the World."
        -- Bardic Motto



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Re: RE: [AVR-Chat] sleep mode in mega16

2004-04-06 by erikc

If you live in the U.S.A. you can.

Erikc  - firewevr@airmail.net
///
"An Fhirinne in aghaidh an tSaoil."
"The Truth against the World."
        -- Bardic Motto
Show quoted textHide quoted text
----- Original Message -----
From: "jay marante" <jaythesis@yahoo.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Tuesday, April 06, 2004 01:52
Subject: Re: RE: [AVR-Chat] sleep mode in mega16


> can i order a free sample from linear technology?
>
> the system only consumes a small amount of current since
im only connec a 4x20 LCD. but later i'll connect a motor to
the system. so for now, i think it only comsumes a small
amount of current.
>
> -jay
>
> erikc <firewevr@airmail.net> wrote:
>
> ----- Original Message -----
> From: "jay marante" <jaythesis@yahoo.com>
> To: <Avr-chat@yahoogroups.com>
> Sent: Monday, April 05, 2004 18:27
> Subject: Fwd: RE: [AVR-Chat] sleep mode in mega16
>
>
> >
> > --- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> > > I think it only consumes a small amount current
> > since
> > > i only an LCD and a keypad. Whats a DC-DC convrtr?
> > Any
> > > particular device i can order?
>
> DC-DC convertor is another term for switch-mode power
> supply.
>
> Numerous companies make switch mode power supply chips,
off
> the top of my head, Texas Instruments, National
> Semiconductor, Linear Technology, Phillips, and Thompson,
> for starters.  I'm familiar with Linear Technology, and
have
> used these parts in the past:
>
> http://www.linear.com/pdf/lt1305.pdf  This part will boost
3
> volts to 5 volts using the circuits shown.
>
> http://www.linear.com/pdf/1174fds.pdf This part, depending
> on how you connect it, will raise 3 volts to 5 volts or
> lower 9 volts to 5 volts without great loss (no where near
> as much as a linear regulator).  In addition, it has a
> shutdown control which effectively turns the device
> completely "off" (less than 10uA leakage current), and a
low
> battery indicator.  There is one intersting circuit that
> produces both +5 and -5 volts from the same 9 volt
battery.
>
> Lots of application circuits are shown, in some cases with
> exact partnumbers and vendor names.
>
>
>
> www.linear.com  (home page)
>
>
> Erikc  - firewevr@airmail.net
> ///
> "An Fhirinne in aghaidh an tSaoil."
> "The Truth against the World."
>         -- Bardic Motto
>
>
>
> ---------------------------------
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>
>    To visit your group on the web, go to:
> http://groups.yahoo.com/group/AVR-Chat/
>
>    To unsubscribe from this group, send an email to:
> AVR-Chat-unsubscribe@yahoogroups.com
>
>    Your use of Yahoo! Groups is subject to the Yahoo!
Terms of Service.
>
>
>
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RE: RE: [AVR-Chat] sleep mode in mega16

2004-04-10 by LightYearCS

Yes, from almost any company, although Linear Technology is a bit harder
since you will need to go through a factory representative (a "rep" for
short).  TI and ADI are relatively easy.  With TI you just go online and
answer a few questions and they will send you five pieces of just about
anything.

 

Again, please don't abuse this privilege okay?

 

TI does make some nice DC-DC converters but make sure you can get it in
a package you can work with.  I'm using the TPS61027 right now which is
a WONDERFUL part (can step up 0.9 volts to 5 volts and even drop 6.5
volts down to 5 volts) but it's in an MLF type leadless package with a
solder thermal pad and the only effective way to work with it is to
solder reflow the part.  Most people are not equipped to do this kind of
work.

 

Barry
Show quoted textHide quoted text
-----Original Message-----
From: jay marante [mailto:jaythesis@yahoo.com] 
Sent: Monday, April 05, 2004 5:53 PM
Subject: Re: RE: [AVR-Chat] sleep mode in mega16

 

can i order a free sample from linear technology?

 

the system only consumes a small amount of current since im only connec
a 4x20 LCD. but later i'll connect a motor to the system. so for now, i
think it only comsumes a small amount of current.

 

-jay

erikc <firewevr@airmail.net> wrote:


----- Original Message -----
From: "jay marante" <jaythesis@yahoo.com>
To: <Avr-chat@yahoogroups.com>
Sent: Monday, April 05, 2004 18:27
Subject: Fwd: RE: [AVR-Chat] sleep mode in mega16


>
> --- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> > I think it only consumes a small amount current
> since
> > i only an LCD and a keypad. Whats a DC-DC convrtr?
> Any
> > particular device i can order?

DC-DC convertor is another term for switch-mode power
supply.

Numerous companies make switch mode power supply chips, off
the top of my head, Texas Instruments, National
Semiconductor, Linear Technology, Phillips, and Thompson,
for starters.  I'm familiar with Linear Technology, and have
used these parts in the past:

http://www.linear.com/pdf/lt1305.pdf  This part will boost 3
volts to 5 volts using the circuits shown.

http://www.linear.com/pdf/1174fds.pdf This part, depending
on how you connect it, will raise 3 volts to 5 volts or
lower 9 volts to 5 volts without great loss (no where near
as much as a linear regulator).  In addition, it has a
shutdown control which effectively turns the device
completely "off" (less than 10uA leakage current), and a low
battery indicator.  There is one intersting circuit that
produces both +5 and -5 volts from the same 9 volt battery.

Lots of application circuits are shown, in some cases with
exact partnumbers and vendor names.



www.linear.com  (home page)


Erikc  - firewevr@airmail.net
///
"An Fhirinne in aghaidh an tSaoil."
"The Truth against the World."
        -- Bardic Motto

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