Stuck in reset

chatoooo
 
Posts: 5
Joined: Wed Jan 14, 2015 9:09 pm

Stuck in reset

Sat Jan 24, 2015 8:00 pm

Hi, one of my vocores have some issue. It looks like it stucks in reset. When I connect it to 5V, it does nothing. All GPIOs are in high and when I connect to UARTLite even U-Boot is not starting. Does anyone have some tips how to fix that, or should I send it back for replacement (RMA)?

Greenwire-Elektronik
 
Posts: 101
Joined: Thu Dec 04, 2014 6:31 am

Re: Stuck in reset

Sat Jan 24, 2015 10:38 pm

You could just check whether the reset pin (http://vonger.cn/upload/VoCore.v1.0.pcb.pdf page 3) is pulled low.
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chatoooo
 
Posts: 5
Joined: Wed Jan 14, 2015 9:09 pm

Re: Stuck in reset

Tue Jan 27, 2015 5:52 pm

I have investigated it more further.

Not all GPIOs are high, but all LED pins and few others (green led on vocore is on).
3.3V...OK
1.8V... OK
Manual Reset (Reset pin to ground)...no change
809S looks fine

Maybe flash does not contains U-Boot

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