[Arm-netbook] tablet casework prototype done

[Luke Kenneth Casson Leighton]

http://rhombus-tech.net/community_ideas/kde_tablet/news/

the mendel90 printer is working really well, and was absolutely worth
it to use for prototyping of casework. the 7in tablet project is now
being done as an open hardware project, under the GPLv3+. files are
available at http://hands.com/~lkcl/eoma/kde_tablet

with a preliminary casework finished that has been prepared in
conjunction with the pcb layout, work can proceed to finalise the pcb
and then send it off for assembly. there are a couple of risky areas
on the tablet pcb, due to datasheets and app notes simply not being
available: the usb audio and the usb camera IC. these are a CM108AH
and a Vi Micro VC0345 respectively. perhaps prior to sending off this
PCB it may be worthwhile tracking down small USB devices with those
chipsets in, in order to inspect them and check their PCB layout.

however if anyone already _has_ a USB audio dongle with a CM108AH or a
USB camera with a VC0345 chipset please do say so as i would greatly
appreciate some hi-res photos of the PCB, both sides.

l.

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[Christopher Havel]

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[Christopher Havel]

Cracked it open, out of curiosity. It's a Micronas UAC-3556B. Probably
counterfeit, given the SimSun style font on the chip. LOL.

I can send you photos if it would help somehow, but it's definitely not
what you're looking for.

The Plantronics dongle is a "USB DSP v2", for the record.

Post by Christopher Havel
Luke, I have a Plantronics USB Audio dongle, don't recall model # offhand.
Is there a way to determine the chipset easily without cracking the case?
I'd send you a picture but I, er, can't find one on Google Images. LOL.
On Tue, Dec 30, 2014 at 5:04 PM, Luke Kenneth Casson Leighton <

Post by Luke Kenneth Casson Leighton
http://rhombus-tech.net/community_ideas/kde_tablet/news/
the mendel90 printer is working really well, and was absolutely worth
it to use for prototyping of casework. the 7in tablet project is now
being done as an open hardware project, under the GPLv3+. files are
available at http://hands.com/~lkcl/eoma/kde_tablet
with a preliminary casework finished that has been prepared in
conjunction with the pcb layout, work can proceed to finalise the pcb
and then send it off for assembly. there are a couple of risky areas
on the tablet pcb, due to datasheets and app notes simply not being
available: the usb audio and the usb camera IC. these are a CM108AH
and a Vi Micro VC0345 respectively. perhaps prior to sending off this
PCB it may be worthwhile tracking down small USB devices with those
chipsets in, in order to inspect them and check their PCB layout.
however if anyone already _has_ a USB audio dongle with a CM108AH or a
USB camera with a VC0345 chipset please do say so as i would greatly
appreciate some hi-res photos of the PCB, both sides.
l.
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[Luke Kenneth Casson Leighton]

On Tue, Dec 30, 2014 at 10:26 PM, Christopher Havel

Post by Christopher Havel
Cracked it open, out of curiosity. It's a Micronas UAC-3556B. Probably
counterfeit, given the SimSun style font on the chip. LOL.

:)

i need something with a CM108AH.... but ironically it's possible to
find the datasheet and app notes for the UAC3556B... or whatever it
is. hmmm... when did you buy that dongle?

l.

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[Christopher Havel]

Post by Luke Kenneth Casson Leighton
i need something with a CM108AH.... but ironically it's possible to
find the datasheet and app notes for the UAC3556B... or whatever it
is. hmmm... when did you buy that dongle?

I don't know when it was originally purchased. I got it secondhand. Don't
need it anymore... if you're willing to cover postage to wherever you are
(I'm in the US, North Carolina) I'll send it to you.

[Luke Kenneth Casson Leighton]

On Wed, Dec 31, 2014 at 5:29 PM, Christopher Havel

On Wed, Dec 31, 2014 at 2:12 AM, Luke Kenneth Casson Leighton

Post by Luke Kenneth Casson Leighton
i need something with a CM108AH.... but ironically it's possible to
find the datasheet and app notes for the UAC3556B... or whatever it
is. hmmm... when did you buy that dongle?

I don't know when it was originally purchased. I got it secondhand. Don't
need it anymore... if you're willing to cover postage to wherever you are
(I'm in the US, North Carolina) I'll send it to you.

i'll keep it in mind, i want to try to stick with the CM108AH for now
as the datasheets are publicly available.

l.

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[Dominique Dumont]

Post by Luke Kenneth Casson Leighton
there are a couple of risky areas
on the tablet pcb, due to datasheets and app notes simply not being
available: the usb audio and the usb camera IC. these are a CM108AH
and a Vi Micro VC0345 respectively.

I found this datasheet with duckduckgo:
http://www.hardwaresecrets.com/datasheets/CM108AH.pdf

and with google:
http://www.stet.com.cn/%E4%B8%AD%E6%98%9F%E5%BE%AE%E8%A7%86%E9%A2%91%E8%8A%AF%E7%89%87%E4%BA%A7%E5%93%81%E8%A7%84%E6%A0%BC%E4%B9%A6/VC0345TLNA-1102-V10-EN.pdf

HTH

[Luke Kenneth Casson Leighton]

Post by Dominique Dumont

Post by Luke Kenneth Casson Leighton
there are a couple of risky areas
on the tablet pcb, due to datasheets and app notes simply not being
available: the usb audio and the usb camera IC. these are a CM108AH
and a Vi Micro VC0345 respectively.

http://www.hardwaresecrets.com/datasheets/CM108AH.pdf
http://www.stet.com.cn/%E4%B8%AD%E6%98%9F%E5%BE%AE%E8%A7%86%E9%A2%91%E8%8A%AF%E7%89%87%E4%BA%A7%E5%93%81%E8%A7%84%E6%A0%BC%E4%B9%A6/VC0345TLNA-1102-V10-EN.pdf

yes, me too, here:
http://hands.com/~lkcl/eoma/kde_tablet/VC0345TLNA-1102-V10-EN.pdf
and http://hands.com/~lkcl/eoma/kde_tablet/CM108_DataSheet_v1.6.pdf
and i also found an app note for the VC0345:
http://hands.com/~lkcl/eoma/kde_tablet/VC0345_app_notes.pdf

i believe i even also found someone who had released ORCAD schematics
for the CM108AH (looks that way from the list of files here
http://hands.com/~lkcl/eoma/kde_tablet/)

but i would preferr to have something actually in my hands, or
close-up hi-res photos, as i can then be much more confident that i
have a decent layout.

l.

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