Y-cable and USB-OTG / Core perimeter drawing v1

[Andy Green]

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Somebody in the thread at some point said:
| Somebody in the thread at some point said:
| | sorry for jumping into this thread so late...
| |
| | we are at the point of considering having 2! external accessible usb
| | connectors for reasons of not wanting to sacrifice charging while using
| | usb client OR host as well as providing power to usb host if wanted as
| | well as having a internal debugboard.
|
| My understanding of where we are headed is two micro USB B, probably
| both accessible from the outside.

I realized that we are not making enough documents and especially
drawings to track what we are keeping of the volume of ideas that get
discussed.  There is a fairly good mental consensus floating about but I
can imagine that is not actually obvious to a casual observer.

So this drawing tries to capture the "perimeter" of the GTA04 core and
subsystems.  Everything that comes out of the case is in a red box on
the main "core" circle.  If we see something wrong, holler.

- -Andy
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