[Arm-netbook] Price for A10 dev kit

[jonsmirl at gmail.com]

On Sat, Dec 31, 2011 at 2:23 AM, lkcl luke <luke.leighton at gmail.com> wrote:
> On Sat, Dec 31, 2011 at 1:20 AM, jonsmirl at gmail.com <jonsmirl at gmail.com> wrote:
>> On Fri, Dec 30, 2011 at 8:14 PM, Tom Cubie <tangliang at allwinnertech.com> wrote:
>>> On 12/31/2011 08:35 AM, jonsmirl at gmail.com wrote:
>>>> Does anyone know the price for the A10 dev kit?
>>>> http://www.wits-tech.com/pages/board.jsp
>>>>
>>>
>>> I'm sorry to say that the current price is $1000. It's mainly for
>>> enterprise. Our market guys said there will be a re-designed dev board
>>> of A10 at the price of less than 1000RMB soon for diyer.
>>
>> Is there a datasheet available for the A10?
>
>  yes... but it would be, not being funny or anything, of absolutely no
> use to you [see discussion last week].  summary is: the source code is
> of far more use to you than the datasheet, which is more in the form
> of "note-taking and incomplete reminder to engineers of the existence
> of feature x y and z".
>
>  that having been said, a post was kindly made which has a link to an
> unauthorised leaked copy of the datasheet [which, i promise you, will
> be of no use to you, i'm looking at the official RHT copy right now
> and section 21.2 AC97 Signal Description has a table with the signal
> names and that's it].
>
>> We have an audio application that maybe good for the chip and I need
>> to know about the I2S channels.
>
>  in shorthand, the datasheet says "they exist".
>
>  section 20.1 it's the usual stuff - PCM, 8-bit u-law or A-law, I2S or
> PCM, data rate from 8khz to 192, support of 8 channel output and 2
> channel input, exactly as (i hope!) you'd expect an I2S interface to
> have.
>
>  ok there is an AC97 interface [it's referred to as AC97_MCLK, BCLK,
> SYNC, DO and DI] shared pins with I2S
>
>  but there is also an on-board embedded 24-bit Audio Codec *including*
> headphone, FM, Line and MIC (all of them stereo).  hm, that's weird,
> the FM radio, Line and MIC are IN.  section 22.
>
>  anyway, again: that just says "these things exist" and so for details
> of how it works, you really do have to go to the source code.
>
>  so, that aside: could you let me know a bit about what it is that you
> would like to do?  we have about 6 (!) possibly 8 pins spare on the
> 44-pin expansion header (unless another one is added, or unless it's
> taken up to 50-pin)

The company I work for builds embedded audio processors. They do a lot
of math on the audio signals so we are always looking for cost
effective ways to get more CPU power. They are currently based on the
TI AM3503. The A10 provides a lot more CPU horsepower. We have enough
volume that we'd use the A10 directly if we decide that it will work.

For your product I'd put the LINE and MIC signals onto the connector.
That will allow someone to hook up a mic and speaker by using a simple
amp.

Does the chip support Intel HD Audio? If not, it is complicated
getting 5.1 out of it. If it does, route that to the edge connector
too and then use an external CODEC chip.


>
>  if the 4 HP and MICIN signals were on the expansion header, would
> that help?  or, would you prefer the AC97 interface (pins of that are
> shared with the I2S pins, hmmm there's up to 8 of those because
> there's 4 data-bits.
>
>  l.
>
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-- 
Jon Smirl
jonsmirl at gmail.com