Does an enabled internal pullup remain active in power-down sleep mode?

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kk6gm
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Posted by kk6gm: Fri. Jan 12, 2018 - 08:09 PM
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Device is ATTINY_13.  I don't see anything in the data sheet about this (looking in the wrong places?).  I need a pullup (internal or external) on an INT pin for wakeup.  Thanks.

 

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AVR Microcontrollers, megaAVR and tinyAVR, solved
Last Edited: Fri. Jan 12, 2018 - 10:33 PM
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ki0bk
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Posted by ki0bk: Fri. Jan 12, 2018 - 08:10 PM
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Yes, ..... show me in the DS where it does not!

 

 

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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frog_jr
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Posted by frog_jr: Fri. Jan 12, 2018 - 08:19 PM
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Edit: Posted wrong image (should be):

 

David

Last Edited: Fri. Jan 12, 2018 - 08:27 PM
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ki0bk
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Posted by ki0bk: Fri. Jan 12, 2018 - 09:14 PM
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The port registers are not changed by the cpu entering sleep mode, so they will stay in what ever configuration they were in when the cpu enters sleep (cpu clock stopped),

port bits will be high/low, and pullup enabled/disabled as before.  Reset as pointed out above will change their state back to initial values.......

 

Have fun.

 

Jim

 

 

(Possum Lodge oath) Quando omni flunkus, moritati.

"I thought growing old would take longer"

 

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kk6gm
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This reply has been marked as the solution. 
Posted by kk6gm: Fri. Jan 12, 2018 - 10:32 PM
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Great, thanks for the confirmation.

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