qi_avt2 v1.0 board status

Adam Wang adam at qi-hardware.com
Sat Oct 3 12:06:31 EDT 2009


Hi Carlos,

But I do like your explanation and teach me about the impedance of usb 
host EMI filter and terminations. I'll find this USBDF01W5 or compatible 
part here.
I was wrong in this.
Adam

Carlos Camargo wrote:
> Hi Adam.
>
>
>
> You're totally right, If you remove Q6 as I done :(  The power 
> amplifier is enabled all the time, without signal, but enabled, so Q6 
> is necessary.
>
>
>
> Carlos
>
>
> On Sat, Oct 3, 2009 at 9:02 AM, Adam Wang <adam at qi-hardware.com 
> <mailto:adam at qi-hardware.com>> wrote:
>
>     Hi,
>
>
>     Carlos Camargo wrote:
>>     Hi
>>
>>     I'm testing the speaker, I add the following lines to
>>     arch/mips/jz4740/board-xxx.c
>>
>>     *****************************************************
>>         __gpio_disable_pull(GPIO_USB_ID);
>>         __gpio_as_input(GPIO_USB_ID);
>>
>>         __gpio_as_output(GPIO_AMP_EN);
>>         __gpio_set_pin(GPIO_AMP_EN);
>>
>>
>>         __gpio_as_output(GPIO_SHDN_HOST);
>>         __gpio_set_pin(GPIO_SHDN_HOST);
>>
>>     *****************************************************
>>     and this lines to  include/asm-mips/mach-jz4740/boad-xx.c
>>
>>
>>     *****************************************************
>>     #define GPIO_SHDN_HOST        49   /* GPB17 Active Low*/
>>     #define GPIO_USB_ID        59   /* GPB27 */
>>     #define GPIO_AMP_EN        100  /* GPD4 Active High*/
>>     *****************************************************
>>
>>
>>     With this changes the speaker works, as you can see in [1]. But I
>>     think that the Transistor Q6 is not necessary, Q6 is always ON,
>>     so on the pin 7 of U10 (CE) we have the value of AMPEN. In this
>>     configuration Q6 use the GPIO current, so we don't need tghis
>>     transistor we can remove it and connect AMPEN directly to U10's
>>     pin 7 (CE)
>>
>     No, the Q6 is designed as a role of either Earphone plugging or
>     speaker activating at the same time. If there's no earphone
>     inserted, the AMPIN pin is Low; otherwise, it is a High. So during
>     no earphone inserted, meanwhile, this Low of AMPIN can activate Q6
>     turn on, CPU can know current condition is for speaker. The AMPEN
>     can either giving a Low to MUTE speaker or giving HIGH to turn on
>     speaker. But as long as earphone inserting, the AMPIN becomes
>     High, this will let Q6 to be turn off (means automatically turn
>     off speaker if user wants to listen via earphone). Then pin7(CE)
>     of U10 is Low. So this Q6 is necessary. :-)
>     Adam
>>     I'm trying to use a USB host, but the kernel don't recognize any
>>     usb device attached to this port, I'm continuing test this port...
>>
>>
>>     Carlos
>>
>>
>>
>>     [1]http://downloads.qi-hardware.com/hardware/hacking/naruto_audio.mp4
>>
>>
>>
>>
>>
>>
>>
>>     On Wed, Sep 30, 2009 at 8:03 PM, Adam Wang <adam at qi-hardware.com
>>     <mailto:adam at qi-hardware.com>> wrote:
>>
>>         Hi Carlos,
>>
>>         Congradulations!!!
>>
>>         Carlos Camargo wrote:
>>>         Hello
>>>
>>>         Very beautiful pictures Adam!!!
>>>
>>>         I have two boards with 64MB and works fine, I have a little
>>>         problem with the LCD connector, I Think that this connector
>>>         change its shape in the soldering process,
>>         Yes, you are right. The LCD connector should be normally in
>>         mounting by SMT process, but for cob process they need a
>>         smooth and flat bottom side which so i cannot
>>         use automatically mount machine to do it first because it
>>         will need an extra expense for jig to meet the bottom side's
>>         all components' shape on cob site. If having more quantities,
>>         the jig can be applied, so this condition should won't be
>>         occurred. :-)
>>>         so I replace this connector in both boards by another one
>>>         (thanks Adam) and I can use both LCDs. I'm starting to test
>>>         the sound and USB host port. I'm attaching 
>>         The whole new picture of Nanonote for avt2 is now same as me
>>         here. :-)     The sound and USB host port yeah need your help
>>         later. And the current status of avt2 v2.0 is at here, you
>>         all can quickly see that.
>>         http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/qi_avt2_v1.0_report.ods
>>
>>
>>
>>>         some Nano pictures [1] New Nano show openwrt Logo  [2] Using
>>>         a custom FTDI USB-serial (I think that we can provide this
>>>         board with a Nano developer version)
>>         Do you think that the serial console cable provided to you is
>>         good for h/w hacker in purpose? It was made by here vendor in
>>         free. The question is that I've not been used to meet the
>>         FTDI USB-serial board's female pin holders, from the pictures
>>         it seems a 2.54mm or 2.00mm pitch, right? I have 20 pcs about
>>         such kind of serial console cable. We can do this work by
>>         ourselves to meet any board we're using. But I am not sure if
>>         this is easy and reachable for s/w hacker.
>>         Adam
>>>         [3] With usb host connector attached
>>>
>>>
>>>         [1]
>>>         http://downloads.qi-hardware.com/hardware/hacking/Nano_works.jpg
>>>         [2]
>>>         http://downloads.qi-hardware.com/hardware/hacking/usb_serial.jpg
>>>         [3]
>>>         http://downloads.qi-hardware.com/hardware/hacking/usb_host.jpg
>>>
>>>         Best Regards
>>>
>>>
>>>         Carlos
>>>
>>>
>>>         On Wed, Sep 30, 2009 at 5:05 AM, Wolfgang Spraul
>>>         <wolfgang at qi-hardware.com <mailto:wolfgang at qi-hardware.com>>
>>>         wrote:
>>>
>>>             Andres,
>>>
>>>             > The price of the jz4720  plus the bonding wire price
>>>              is competitive
>>>             > against the  jz4740 price plus the BGA soldering process?
>>>
>>>             Well that's a very long story, as always with prices :-)
>>>             COB is getting more popular in China (and that means in
>>>             most consumer
>>>             electronics), because it is cheaper. At least that's
>>>             what the manufacturers
>>>             are saying but I'm sure companies that are producing
>>>             millions of devices each
>>>             month know their numbers.
>>>
>>>             For the 20 boards we produced, we paid about 30 USD /
>>>             chip for the COB :-)
>>>             Not exactly cheaper...
>>>             See a more detailed cost breakdown for the 20 boards at
>>>             http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/expense/avt2_v1.0_expense.ods
>>>             For 500 boards the price would go down to ca. 15 USD /
>>>             chip for the COB alone.
>>>
>>>             Now, one problem we had was that Adam could not find COB
>>>             places in northern
>>>             Taiwan that could do .8mil aluminum wires (see Adam's
>>>             mail that you just
>>>             responded to). So in order to just 'get the boards
>>>             done', he chose .7mil
>>>             gold wires.
>>>
>>>             Going forward we need to improve all this.
>>>             Maybe for another few small runs we continue to do COB,
>>>             especially since
>>>             Adam has it all figured out now. But then we will
>>>             probably look into QFP/QFN
>>>             versions, or BGA. The problem with switching to BGA on
>>>             the current NanoNote
>>>             board was that Adam said because the other side of the
>>>             PCB was all covered
>>>             by keys, we would need to go from a 4-layer to a 6-layer
>>>             PCB when using BGA.
>>>
>>>             Wolfgang
>>>
>>>             On Tue, Sep 29, 2009 at 10:38:44PM -0500, Andrés
>>>             Calderón wrote:
>>>             > On Tue, Sep 29, 2009 at 10:52 AM, Adam Wang
>>>             <adam at qi-hardware.com <mailto:adam at qi-hardware.com>> wrote:
>>>             > > Hi Carlos,
>>>             > >
>>>             > > Sorry for the late, you can check those pictures of
>>>             actual bonding wire
>>>             > > here[1]. It's an 0.7mil golden wire. I can
>>>             illustrate a little bit in report
>>>             > > to show how make
>>>             > > it layout right. Local vendors here are having
>>>             aluminum capability but can
>>>             > > not meet our die's pitch between pads, because they
>>>             have only 1.0 mil. Will
>>>             > > not have
>>>             > > good quality in aluminum process on our case.
>>>             Fortunately here have 0.7 mil
>>>             > > gold wire process but expensive. :-)  And most early
>>>             vendors here had moved
>>>             > > into China.
>>>             > >
>>>             > > [1]
>>>             > >
>>>             http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/pcb/cob/bonding_wire/
>>>             > >
>>>             >
>>>             > Amazing pictures (the bonding_wire7.jpg  is my new
>>>             desktop background :) )
>>>             >
>>>             > The price of the jz4720  plus the bonding wire price
>>>              is competitive
>>>             > against the  jz4740 price plus the BGA soldering process?
>>>             >
>>>             > BR,
>>>             >
>>>             >     Andrés Calderón
>>>             >     Cel:     +57 (300) 275 3666
>>>             >     Email: andres.calderon at emqbit.com
>>>             <mailto:andres.calderon at emqbit.com>
>>>             >     Web:    www.emqbit.com <http://www.emqbit.com>
>>>             >
>>>             >
>>>             > > Adam
>>>             > >
>>>             > > Carlos Camargo wrote:
>>>             > >
>>>             > > Hi Adam
>>>             > >
>>>             > > Can you please upload a processor close-up photo?
>>>             > >
>>>             > > Best Regards
>>>             > >
>>>             > >
>>>             > > Carlos
>>>             > >
>>>             > >
>>>             > > On Sun, Sep 13, 2009 at 8:30 AM, Carlos Camargo
>>>             <cicamargoba at gmail.com <mailto:cicamargoba at gmail.com>>
>>>             > > wrote:
>>>             > >>
>>>             > >> hi adam, good job. i want one new board :).
>>>             > >> when finish all tests, please check the kicad brd
>>>             file. we want that
>>>             > >> the next board will be designed in kicad.
>>>             > >> We've already uploaded pcb and footprints files,
>>>             all components placed,
>>>             > >> and remove a lot of test-points
>>>             > >>
>>>             > >> Can you please check if the placement and size are
>>>             right ?
>>>             > >>
>>>             > >> Best Regards
>>>             > >>
>>>             > >>
>>>             > >> Carlos
>>>             > >>
>>>             > >> On Sun, Sep 13, 2009 at 3:52 AM, Adam Wang
>>>             <adam at qi-hardware.com <mailto:adam at qi-hardware.com>> wrote:
>>>             > >>>
>>>             > >>> Hi All,
>>>             > >>>
>>>             > >>> The picture of avt2_v1.0 board with die is here[1].
>>>             > >>> And it just works and shown up[2].
>>>             > >>> I'll keep do more basic IO tests.
>>>             > >>> Adam
>>>             > >>>
>>>             > >>> [1]
>>>             > >>>
>>>             http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/smt/pictures/top_jz4720.jpg
>>>             > >>> [2]
>>>             > >>>
>>>             http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/report/photos/avt2_v1.0_works.JPG
>>>             > >>>
>>>             > >>> Adam Wang wrote:
>>>             > >>>>
>>>             > >>>> Hi All,
>>>             > >>>>
>>>             > >>>> We're now on the process to produce small run of
>>>             avt2 board, here is the
>>>             > >>>> top side of avt2 without jz4720 temporarily;
>>>             > >>>>
>>>             > >>>>
>>>             http://downloads.qi-hardware.com/hardware/qi_avt2/v1.0/smt/pictures/top.jpg
>>>             > >>>> Will keep you posted later.
>>>             > >>>> Adam
>>>             > >>>
>>>             > >>>
>>>             > >>> _______________________________________________
>>>             > >>> Qi Developer Mailing List
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>>>             > >>
>>>             > >>
>>>             > >>
>>>             > >> --
>>>             > >> Carlos Iván Camargo Bareño
>>>             > >> Profesor Asistente
>>>             > >> Departamento de Ingeniería Eléctrica y Electrónica
>>>             > >> Universidad Nacional de Colombia
>>>             > >> cicamargoba at unal.edu.co
>>>             <mailto:cicamargoba at unal.edu.co>
>>>             > >
>>>             > >
>>>             > >
>>>             > > --
>>>             > > Carlos Iván Camargo Bareño
>>>             > > Profesor Asistente
>>>             > > Departamento de Ingeniería Eléctrica y Electrónica
>>>             > > Universidad Nacional de Colombia
>>>             > > cicamargoba at unal.edu.co <mailto:cicamargoba at unal.edu.co>
>>>             > >
>>>             > > ________________________________
>>>             > > _______________________________________________
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>>>             > >
>>>             > > _______________________________________________
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>>>
>>>
>>>
>>>         -- 
>>>         Carlos Iván Camargo Bareño
>>>         Profesor Asistente
>>>         Departamento de Ingeniería Eléctrica y Electrónica
>>>         Universidad Nacional de Colombia
>>>         cicamargoba at unal.edu.co <mailto:cicamargoba at unal.edu.co>
>>>         ------------------------------------------------------------------------
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>>
>>
>>         _______________________________________________
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>>         Subscribe or Unsubscribe:
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>>
>>
>>
>>
>>     -- 
>>     Carlos Iván Camargo Bareño
>>     Profesor Asistente
>>     Departamento de Ingeniería Eléctrica y Electrónica
>>     Universidad Nacional de Colombia
>>     cicamargoba at unal.edu.co <mailto:cicamargoba at unal.edu.co>
>>     ------------------------------------------------------------------------
>>     _______________________________________________ Qi Developer
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>>     <mailto:developer at lists.qi-hardware.com> Subscribe or
>>     Unsubscribe:
>>     http://lists.qi-hardware.com/cgi-bin/mailman/listinfo/developer
>
>
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>     Subscribe or Unsubscribe:
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>
>
>
>
> -- 
> Carlos Iván Camargo Bareño
> Profesor Asistente
> Departamento de Ingeniería Eléctrica y Electrónica
> Universidad Nacional de Colombia
> cicamargoba at unal.edu.co <mailto:cicamargoba at unal.edu.co>
> ------------------------------------------------------------------------
>
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