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rk2926 board


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#1 x58

x58

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Posted 02 July 2014 - 11:49 PM

So when playing a little bit too much with it i broke a part of the protection ic or pmu chip on the rk2926 board :(

However i was able to start it and it seems to fully work, the only problem is that its looping in the battery charging mode. So in order to bypass this now i have to supply it with 3.7v 200mah lipo battery and then add usb pwr start it disconnect the usb power and short GND with J3Y transistor you see next to the pmu (T659102 A1).

So i was thinking of an much easier way, a micro usb A to B factory cable. Well i didn't really had a cable to mess with for this. So i came up with this factory cable with active power. Works on mini and mirco usb and probably others.

 

ID(N/C or GND with resistor?) -> VCCD 

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But the problem really is that it isn't work properly, sometimes this works and the devices starts and other times it just loops until i shut it down.. Will keep this updated, i have the datasheet of the pmu chip. The only problem is that i cannot find one of the rk2926..


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