Test points - a possible future direction

[Uwe Klein]

On 7/24/08, Andy Green <andy at openmoko.com> wrote:
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>  Somebody in the thread at some point said:
>  | On 7/24/08, Thomas Seiler <thseiler at gmail.com> wrote:
>  |>  You would just need a 2x3 block or so:
>  |>  VBAT  VIO_3v3  (power these cannot pe but on FPC)
>  |>  GND   GND
>  |>  I2C     I2C         (these are nice because a single connector for
>  |>  most basic mods is sufficient)
>  |
>  | mindreader!
>  | Though I think VBAT is a bad idea. and
>  | The 3.3V supply should be switchable from the host.
>
>  I think this whole testpoint and connector thing is definitively the
>  wrong direction.
>
>  The USB host socket
>
>  ~ - doesn't need you to open the case of Freerunner
>  ~ - provides 2.5W power for the external device
>  ~ - gives ~1MByte/sec bandwidth in one direction or the other
>  ~ - has many standard classes supported in kernel
>  ~ - does not need delicate cables
>  ~ - allows Y cable so incoming power and charge is possible too

Well, its two different things.
There are lots of _small_ devices that attach to the I2C bus
and would integrate well inside the enclosure. temp sensors
and da/ad converters come to mind.

attaching external usb devices is on an entirely different level.

uwe