GTA04 Block V4
OpenMoko at mauve.plus.com
Fri Aug 15 16:48:27 CEST 2008
Andy Green wrote:
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> Somebody in the thread at some point said:
> | On 8/14/08, Ian Stirling <OpenMoko at mauve.plus.com> wrote:
> |> This is part of my cunning plan to get a usable connector for expansion
> |> on the phone :)
> | Fullsize SD- Card slot for SDIO ?
> | what would you like to have accesible on an expansion slot.
> | ("nice" very small formfactor connectors are rare)
> Really USB host is very "usable" and flexible for these tasks.
In some ways, yes.
It mandates a microcontroller, USB and programming, and can't do wakeup
I'm sure I wrote up a detailed list of desirable stuff with reasons, and
put it on the wiki. I think it may have been edited, and I can't now
Connectors are the hard part.
Ideally I'd like a connector with 20 pins or so, that auto-aligns when
the new back is slammed on.
This is not going to happen.
Second choice would be a board-board connector maybe .05" centers, two
rows of 10 contacts, with pins.
Probable ending point is a FPC connector, with 20 pins.
These would be:
0: VBatt (to allow both charging and running from the battery - any
responsibility for not exploding the battery would be entirely on the
1 – debug programming/3.3V supply when on (+3.3v)
2 – TDO /GPIO
3 – TDI /GPIO
4 – nTRST
6 – TMS /GPIO
7 – GND
8 – TCK /GPIO
9 - I2C-SCL
10 - I2C-SDA
11 - SPI-CLK0
12 - SPI-MOSI
13 - SPI-MOSI
14 - SS0
15 - EINT
16 - D+ (straight connection across external port pins)
17 - D- (again, straight connection)
18 - GND
19 - VBatt
This is of course a rough scribble only.
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