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

[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
> >
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> >
> >
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