Been down that hard road before myself.  It's easy to get low power, 
it's hard to get it lowest.

*Actively* turn off all peripherals.  Return the clock modules to 
their default values.  All unconnected pins outputs set low.

JJS

> Ok, now, all the pins have correct settings, the
lcd on and the 
power
> consumption is 600uA while sleeping.  I still
think that this is 
way too
> high.  It should be about 20 or 30 uA at most when
LPM3.  Any more
> ideas?

> All unconnected pins outputs set low.

If an unconnected pin is made output high will there be measurably more
current consumption than if it were output low, due to leakage through the
output's lower transistor?  No, wait, the same type of relationship would
exist if the pin were output low.  So there's no difference.  Or is there?

--Bruce

What is the power source for the board, and what power regulation if 
any, sorry I missed a couple of earlier posts, didn't make it past the 
firewall. Do you have any power management of peripherals?

Al

Bruce Cannon wrote:

> If this is a custom board the absolutely easiest
way to go is to populate
> it one element at a time.  Start with the MSP430, verify that you do indeed
> get the current you want to see, then add one more element at a time,
> retesting as you go.  If you only have the one PCB you can cut traces like
> crazy, then reconnect them one at a time.  Or work in reverse, severing one
> element at a time, but this is not as straightforward.
> 
> I think no one will be able to remote debug a system for you.
> 
> --Bruce
> 
> 
>>Ok, now, all the pins have correct settings, the lcd on and the power
>>consumption is 600uA while sleeping.  I still think that this is way too
>>high.  It should be about 20 or 30 uA at most when LPM3.  Any more
>>ideas?
> 
> 
> 
> 
> 
> .
> 
>  
> 
> ">http://docs.yahoo.com/info/terms/ 
> 
> 
> 

Since the board is already made and it is smd I will start by removing
(cutting traces) parts.  I have the msp and 3 other major parts plus the
lcd.  I'll let you know what happens.
 

Omer,
Try first changing the software , just put the LCD in LPM3 mode after you setup
the ports.
Karl.

  ----- Original Message ----- 
  From: Omer Yalhi 
  To: msp430@msp4... 
  Sent: Monday, August 11, 2003 12:38 AM
  Subject: RE: [msp430] Unreasonably high power consumption


  Since the board is already made and it is smd I will start by removing
  (cutting traces) parts.  I have the msp and 3 other major parts plus the
  lcd.  I'll let you know what happens.



  


        
             
       
       

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