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" <email@example.com> 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. -- Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer Message was sent through the cbm-hackers mailing list
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