[Coco] [Color Computer] FYI: USB Modules & Add-Ons

[jdaggett at gate.net]

On 4 Sep 2006 at 20:52, Mark Marlette wrote:

> james,
> 
> I would agree...I'm an Atmel fan.
> 
*********************

I became an HC11 fan simply by default of using so many of them at work in 
products that were designed. But now that Freescale seems to be letting the 
HC11 line go into obsolescence, I will definitely be looking at other micro 
controllers. The one t hing t hat I do like about the Microchip 16LF877A part is 
that port D can be used as a parallel slave port. You can map it as a peripheral 
port to the Coco and read and write to the 16LF877A as a memory location.This 
opens the device up to some interesting uses for the Coco. 

james 


> Mark
> Quoting jdaggett at gate.net:
> 
> > Mark
> >
> > Here is the PDF errata sheet link:
> >
> > http://www.cypress.com/portal/server.pt?space=CommunityPage&control=SetCo
> > mmunity&CommunityID=209&PageID=259&fid=10&rpn=SL811HS
> >
> > next to the data sheet is the errata link to download the errata sheet.
> >
> > To me I have issues with a device that is essential broke and the only  work
> > arround is not use the feature. Auto address increment is where I 
> > have the most
> > issues. At 2MHz buss rate reading up to 64 bytes from the FIFO and having to
> > write the address for each byte read is double the time.
> >
> > Erratas that may be of concern:
> >
> > #6 details the issues with auto increment function. From what I gather
> > #this is an
> > intermittant problem and the only workaround is to not use the
> > autoincrement mode on addressing.
> >
> > #1 concerns with SEO when in host mode working and low speed with certain
> > hubs. SOFs stop being sent.
> >
> > #2 deals with Sync to SOF in low speed mode is not functional.
> >
> >
> > james
> >
> >
> >
> > On 4 Sep 2006 at 13:36, Mark Marlette wrote:
> >
> >> james,
> >>
> >> Do you have a link to the errata?
> >>
> >> Mark
> >>
> >> At 9/3/2006 02:06 PM, you wrote:
> >>
> >> >On 2 Sep 2006 at 23:30, Gene Heskett wrote:
> >> >
> >> > > And this is the major advantage over the FTDI devices shown on the same
> >> > > web page as it appears these might be usable with nothing more than chip
> >> > > select logic, and possibly a byte wide fifo for rx buffering.  
> >> The cheaper
> >> > > FTDI devices would also need an rs232 type uart, raising the
> >> > > implementation cost considerably.
> >> >
> >> >**************
> >> >
> >> >The FT245B/R devices interface to a parallel 8 bit data buss. Same
> >> >function as
> >> >the FT232. The FT245B is $6.33 in unit cost and the FT245R is $4.94
> >> >unit cost.
> >> >Like the Cypress SH811 device, someone has to write drivers for DEB/OS9 to
> >> >make them useable. From best I can tell the FT245 would be a better 
> >> solution
> >> >than the Cypress chip due to errata and the lack of Cypress to correct some
> >> >issues in the chip design.
> >> >
> >> >james
> >> >
> >> >--
> >> >Coco mailing list
> >> >Coco at maltedmedia.com
> >> >http://five.pairlist.net/mailman/listinfo/coco
> >> >
> >> >
> >> >
> >> >
> >> >--
> >> >Internal Virus Database is out-of-date.
> >> >Checked by AVG Free Edition.
> >> >Version: 7.1.405 / Virus Database: 268.11.6/428 - Release Date: 8/25/2006
> >>
> >
> >
> >
> > --
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> > Coco at maltedmedia.com
> > http://five.pairlist.net/mailman/listinfo/coco
> >
> 
> 
> 
> 
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