Re: [Gumstix-users] Add an USB 2.0 hub to the Verdex

[Albert D. <al...@da...>]

This is only the charge pump:
http://www.analogictech.com/products/digitalfiles/AAT3125.pdf

On 27-mrt-2007, at 3:33, Albert Dahan wrote:

> I think you don't have the lines available on the 60pins.
>
> Regards,
> Albert
>
> On 27-mrt-2007, at 3:26, Daniel O'Shea wrote:
>
>> No, I mean that the PXA270 has an internal transceiver that only
>> requires an external charge pump.
>>
>> Albert Dahan wrote:
>>> I found this one:
>>> http://www.atmel.com/dyn/resources/prod_documents/3420s.pdf
>>> Is this what you mean?
>>> Regards,
>>> Albert
>>> On 27-mrt-2007, at 3:05, Daniel O'Shea wrote:
>>>> ...please see the attached PDF, and 12.4.5 in PXA270 Design Guide:
>>>>
>>>> http://pubs.gumstix.com/documents/PXA%20Documentation/PXA270/
>>>> PXA270% 20Design%20Guide%20[280001-002].pdf
>>>>
>>>> (you'd have to make sure that all the necessary pins are
>>>> accessible  on the verdex though - I haven't checked)
>>>>
>>>> Albert Dahan wrote:
>>>>
>>>>> Hi Daniel,
>>>>> Thank you for your reply, can you explain me how the charge
>>>>> pump  works?
>>>>> Regards.
>>>>> Albert
>>>>> On 26-mrt-2007, at 16:34, Daniel O'Shea wrote:
>>>>>
>>>>>> Albert Dahan wrote:
>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> I'm going to try to add a USB 2.0 hub to the USB host on the
>>>>>>> verdex
>>>>>>> 60 pins.
>>>>>>>
>>>>>>> The most simple chip I found is the CYC65630, is this one a
>>>>>>> good  idea?
>>>>>>>
>>>>>>> Datasheet:
>>>>>>> http://download.cypress.com/publishedcontent/publish/
>>>>>>> design_resources/
>>>>>>> datasheets/contents/cy7c65630_8.pdf
>>>>>>>
>>>>>>> Regards,
>>>>>>> Albert
>>>>>>
>>>>>> ...why not just use the PXA270's USB host controller port 2
>>>>>> internal
>>>>>> transceiver through an external charge pump? (see 12.4.5 in
>>>>>> the  PXA270
>>>>>> Design Guide)
>>>>>> <AAT3125.pdf>
>
>
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