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'[EE]: Excessive current going into sleep!'
2000\07\05@071334 by Graham North

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Hi

I am currently fault finding on a board that spends most of it's life in
sleep mode (battery operated), when a key is pressed it wakes up, does what
it has to and then returns to sleep mode.

The micro wakes up fine, does what it needs to, but then seems to use a lot
of current before returning to sleep mode.
Has anyone ever seen anything like this before?

Sorry this is not a [PIC]: subject as the micro is an Intel 80C32, but I
would still like to here your comments.

Thanks

Graham North

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2000\07\05@104155 by Gerry Cox

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Hi Graham,

My first thought is that you probably have cmos IC's connected to the I/O
and  which are spending some time neither high nor low after sleep is
actioned. Therefore these  devices are in the 'linear' state and drawing
lots of current. The fix is probably a 100K resistor(s) to ground to pull
the node(s) down quickly.

Gerry Cox
Weymouth Dorset U.K.




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Hi

I am currently fault finding on a board that spends most of it's life in
sleep mode (battery operated), when a key is pressed it wakes up, does what
it has to and then returns to sleep mode.

The micro wakes up fine, does what it needs to, but then seems to use a lot
of current before returning to sleep mode.
Has anyone ever seen anything like this before?

Sorry this is not a [PIC]: subject as the micro is an Intel 80C32, but I
would still like to here your comments.

Thanks

Graham North

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]: PIC only [EE]: engineering [OT]: off topic [AD]: advertisements

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2000\07\05@150826 by Arthur Brown

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Yes Me!
I like to sleep alot My Wife, Kids wake me up Ihave a lot of surplus enegey
to burn off the go back to sleep,
I have a lot in common with Hommer
regards Art */ sorry could not resist */

{Original Message removed}

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