Bug 6468

Summary: MinnowMax can be run on power from either USB port
Product: [Hardware Platforms] MinnowBoard MAX Reporter: Max Eliaser <max.eliaser>
Component: hw-minnowmaxAssignee: David Anders <david.anders>
Status: RESOLVED MOVED QA Contact:
Severity: minor    
Priority: Low CC: sjolley.yp.pm, yoctoproject
Version: 2C A0   
Target Milestone: A4 Release   
Hardware: MinnowBoard Max   
OS: Multiple   
Whiteboard:
OS type for building Yocto: --- Type of Regression: ---
Verified: Documentation change: Yes (doc changes required)

Description Max Eliaser 2014-06-19 17:28:15 UTC 
Some powered USB hubs feed power to the MinnowMax back through the USB port. This does not cause the MinnowMax to power on. However if it's already powered on, removing the MinnowMax's power adapter will not cause it to shut down. Instead, it will continue running happily on power from the USB hub. This works with either the USB 2 or USB 3 port.

I have no idea how it would behave if some load were placed on the MinnowMax-- perhaps forcing the CPU into a higher clock/power state would cause it to run out of power and reset.

This was with a dual-core A0 board, although A1s probably have the same problem.

The specific USB hub tested was this one:
http://www.amazon.com/iXCC-Firmware-backwards-compatibility-External/dp/B00GLJLXJG/ref=sr_1_10?ie=UTF8&qid=1403198448&sr=8-10&keywords=ixcc+usb+3
Comment 1 Stephen K Jolley 2014-06-19 17:49:39 UTC 
Assigning this to David to fix in a future version of MinnowBoard-MAX.  Adding John to the CC list.
Comment 2 David Anders 2014-11-07 19:39:33 UTC 
schematic and board layout are complete. performing design review...
Comment 3 David Anders 2014-12-18 22:06:12 UTC 
design review complete, ready to order prototypes.
Comment 4 Michael Halstead 2015-01-12 21:37:31 UTC 
Updating assignee to new office e-mail address.
Comment 5 Stephen K Jolley 2017-06-13 18:02:41 UTC 
We are no longer tracking in Yocto Project Bugzilla MinnowBoard and MinnowBoard-MAX HW and firmware bugs.