From: André Fachat (afachat_at_gmx.de)
Date: 2006-10-08 17:08:06
Hi Marko (and others),
do you have experiences with this USB chip Cypress SL811HS?
http://www.cypress.com/portal/server.pt?space=CommunityPage&control=SetCommunity&CommunityID=209&PageID=259&fid=10&rpn=SL811HS
(Is this what is mentioned as "EZ-USB" below?)
As far as I see there are some CBM projects underway with this
chip, e.g. here http://www.strotmann.de/twiki/bin/view/Microusb/ProjUSBCSixtyFourPic
A first glance at the specs seem to make it easily useable,
but then I do not have any ideas about higher level USB
protocols.... (I am, however, actually planning a prototype board
for my CS/A computer with it)
Considering CPU+USB combinations - I found a place with 6502 with
builtin USB: http://www.jesstech.com/new/english/jes.HTML_Product.phtml?id=5#
(Don't know how reliable this source is, though)
Thanks
Andre
Von: "Marko Mäkelä" <marko.makela@hut.fi>
Betreff: Re: An interesting chip for USB applications
> Hi Wolfgang,
>
> On Sat, Oct 07, 2006 at 11:38:44PM +0200, Wolfgang Moser wrote:
> > Hello Marko,
> >
> > Marko Mäkelä schrieb:
> > >A friend of mine recently told me about the MAX3421E from Maxim
> > ><http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3639>.
> Those chips you mention use their own proprietary USB protocols and
> need special drivers on the PC. The MAX3421E (as well as its precursor
> MAX3420E) allow you to define your own protocol over the USB by
> controlling the chip over the SPI bus. I would guess that the two most
> > At first there's the Cypress EZ-USB series with the FX
> > and FX2 µCs.
>
> The Keyspan usb-to-serial converters have been built using that chip.
> > Secondly there are Microchips PICs with builtin USB cores
> >
> > http://pic18fusb.online.fr/wiki/wikka.php?wakka=WikiHome
> > http://www.holger-klabunde.de/usb/18f2550.htm
> >
> > I heard about some Cons regarding the USB implementation,
> > but that may be bad rumors only from people not having
> > fully understood the specs or the concepts.
>
> That would be understandable, as USB is a very complex standard.
> I think that you are slightly mistaken about the Maxim chip.
> It requires quite a bit of USB programming knowledge,
> although it seems to handle some low-level stuff, such as
> retransmissions. I do not have any experience in low-level
> USB programming yet, though.
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