[Arm-netbook] Laptop PCB schematics

[Luke Kenneth Casson Leighton]

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crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68

On Wed, Feb 22, 2017 at 6:35 PM, Internet <internet at devpi.de> wrote:

> The power issue is pretty tough I think. Do you want to allow charging
> from both sides (12v dc jack and eoma-5v0)
>

yes.

> or does the power from the card only act as additional power for the
> system (without charging and just taking the load off the battery)?
>

no.  an OTG cable into the EOMA68 Card should be capable of charging (not
necessarily *running* the system as it's far too much current required).

> How do you want to control the power switch (SY6280) and detect whether
> the card is passive or active (taking power/providing power)?
>
 usual OTG software detection, then communicated (quickly) to avoid any
current bun-fights.  OTG generates IRQs from the cable being plugged in
(usual way) - the extra bit will be to ensure that the required GPIOs are
pulled high/low - there's quite a few.

l.
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