[Microbit-Python] JTAG headers

[Carlos P.A.]

I honestly don't know really have any knowledge in that area, and as said
already, until the schematics are out I would assume the people that do
know probably won't be able to discuss it.

Just keep in mind that those pins seem to be routed to the kinetis uC
(reponsible to do the programming using the usb storage interface on the
computer), not the nordic chip itself. Taking in consideration there are 5
pins, I wouldn't be surprised if it uses a SWD interface or similar (Vcc,
Gnd, reset, clock and data). Thankfully it is not a bga package, so with a
good set of eyes you could check which pins are connected and reference
that with the datasheet to see what programming interface could be used on
those. Have a look at other mbed boards that might use a similar
configuration (maybe the NXP/Freescale freedom boards?), as there is a
chance it could have been implemented the same way and be documented
somewhere.



On 3 May 2016 at 14:11, Nicholas H.Tollervey <ntoll at ntoll.org> wrote:

> FYI, hardware design files are likely to be released in June (based on a
> recent informal BBC sourced estimate).
>
> N.
>
> On 03/05/16 14:02, Damien George wrote:
> > I don't think this information is public yet... the BBC needs to first
> > release the hardware design files.
> >
> > On Tue, May 3, 2016 at 1:16 PM, Coryan W-S <coryanws at gmail.com> wrote:
> >> Hello all,
> >>
> >> On the back of my Microbit (and very likely yours too) and located to
> the
> >> left of the MicroUSB connector are five small circular pads. A second
> group
> >> of five small circular pads are arranged in a line just below the NXP
> chip.
> >>
> >> I have a strong feeling that each of these are for JTAG, but before I
> start
> >> making a mess of my poor Microbit with a soldering iron, would anybody
> be
> >> able to confirm this? If such is the case: would anyone be kind enough
> to
> >> tell me what the pin mappings are?
> >>
> >> Thankyou very much for your help!
> >>
> >> Best,
> >>  - Coryan
> >>
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>
>
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