Hi,

The company I work for specializes in USB enabled
devices, and each board uses either a TUSB3210
(there's also a TUSB3410 with extra stuff, but we
don't use that one):

http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TUSB3210

or a Cypress -- I think it's one of the EZ-USB FX
line, the CY7C64613.

http://www.cypress.com/products/family.cfm?objectid=FC8F5931-5AFF-46AF-96FE79700B2CBB64&foid=FC8F5931-5AFF-46AF-96FE79700B2CBB64&usecache=true&catName=EZ%2DUSB%20FX#tabdata

The TI has an onboard 8052 microcontroller, the
Cypress has an 8051.

Both of those chips just let us hook directly up to
the USB Port on a computer, no worrying about serial
ports etc. I don't do any of the USB stuff, but the
guy who does tells me when he was learning about it,
he got a Cypress app note example for a USB enabled
mouse and it worked as a basis for all his stuff right
out of the box.

He also has a development kit for the Cypress, because
they didn't have a simulator for the chip he was using
-- but if you have an 8052/8051 simulator I'd think
that'd do the trick for both chips.

I'm not sure how easy it is to communicate on the PC
side with USB, but there are lots of Visual Basic
examples in our "Downloads" section:

http://www.phidgets.com/download/download.html

They might be specific to our app (again, not sure as
I don't work on the VB code either) but might have
some useful info.

If you're doing a one-off sort of thing maybe the
serial->USB chip would be better, if you're working on
a new product line then I think these chips bear
consideration...

Regards,
T.C.



> > --- Luis Moreira <Luis.Moreira@JET.EFDA.ORG>
wrote:
> >> Hi Guys
> >> can anyone point me in the right direction... I
need
> >> to build a board with
> >> USB conectivity but do not know much about it,
need
> >> info badly.
> >> regards
> >>                 Luis


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