[Arm-netbook] next step is a boot image

[Andreas Grapentin]

> On 23. Jan 2023, at 13:49, Andreas Grapentin <andreas at grapentin.org> wrote:
> 
>> On 22. Jan 2023, at 23:15, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>> On Sun, Jan 22, 2023 at 7:46 PM Andreas Grapentin <andreas at grapentin.org> wrote:
>>> 
>>> I removed the RT8288, and now the 5V rail is no longer short to ground. However, I still can’t power the board over USB, I only get around 13mV on the 5V rail. I’ll check around some more and see what I can find. maybe a resistor is faulty.
>> 
>> next thing to check will be the SY6280 which is a current-limiter IC.
>> datasheets and schematics:
>> https://hands.com/~lkcl/eoma/microdesktop/
> 
> I’m looking at the SY6280, but I’m not sure what I’m looking at. I see 5V at the OUT pin going to the USB OTG, and I see no voltage an the IN line to the 5V rail. Enable is pulled high, and both resistors are good at 10k and 6.8k respectively. I have no idea how to check C9 or C8, but I assume those are good.
> 
> In my limited understanding, this does seem to indicate that the chip is faulty, right? I’ll try to get a replacement and see if swapping it out changes anything. I’ll also try to get a replacement for the RT8288 just for kicks.

Seems like the actual SY6280 is tricky to get — Can I use this one as a drop-in replacement?

https://www.digikey.de/en/products/detail/glf-integrated-power/GLF2311A-T1G7/16681132 <https://www.digikey.de/en/products/detail/glf-integrated-power/GLF2311A-T1G7/16681132>

-A