There is a signal, on P9 I believe, called “power”. 

If you pull this pin low with a pushbutton switch, you will get the clean 
shutdown you are looking for.

 

 

 

"No one could make a greater mistake than he who did nothing because he could 
do only a little."

"All that is necessary for the triumph of evil is that good men do nothing" 
Edmond Burke (1729 - 1797)

http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book

http://ca.linkedin.com/pub/bill-pretty/2b/b07/602

 

 

From: [email protected] [mailto:[email protected]] On 
Behalf Of toni incog
Sent: Wednesday, February 25, 2015 12:34 PM
To: [email protected]
Cc: [email protected]
Subject: Re: [beagleboard] BeagleBone Black powers down when AC adapter is 
removed while the USB is connected.

 

I like this behaviour and thought I could use it to cleanly shutdown the bbb. I 
therefore connected a 'powerbar' usb battery to the usb otg port. Now when I 
remove the 5V (strangely called ac) I expect a clean shutdown on power 
delivered by my cheap 'ups'. Only I find out that in /this/ case the bbb 
shutdown immediate instead of a clean shutdown!

So there seams to be a difference in connecting the otg usb to a pc or just to 
a powerbar.

Anyone who can explain this behaviour? In my quest to shutdown a bbb simple, 
cheap and clean.

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No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.5646 / Virus Database: 4299/9178 - Release Date: 02/25/15

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