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'[EE] FT232R Q: Does BIT-BANG mode work?'
2008\04\16@175256 by Bob Axtell

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I was thinking about loading a large I2C RAMTRON thru it.
Any success? I can do it fine thru a PICF87, of course...

--Bob Axtell

2008\04\16@180807 by Alex Harford

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On Wed, Apr 16, 2008 at 2:52 PM, Bob Axtell <spam_OUTengineerTakeThisOuTspamcotse.net> wrote:
> I was thinking about loading a large I2C RAMTRON thru it.
>  Any success? I can do it fine thru a PICF87, of course...

I've done I2C using the FT245 using the libftdi library in Linux:
http://www.intra2net.com/de/produkte/opensource/ftdi/

Very slow at reading since the USB latency kills performance.  But
writing is ok since you can assemble large chunks of data and send it
out in a single USB packet.  I believe there are some libraries for
Windows that use a different (D2XX?) mode that will give you better
performance.

Alex

2008\04\16@202649 by Xiaofan Chen

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On Thu, Apr 17, 2008 at 5:52 AM, Bob Axtell <.....engineerKILLspamspam@spam@cotse.net> wrote:
> I was thinking about loading a large I2C RAMTRON thru it.
> Any success? I can do it fine thru a PICF87, of course...
>

I believe it will work. I've read people even built an AVR
programmer with the bit-bang interface.
http://osdir.com/ml/hardware.avr.avrdude.devel/2005-08/msg00064.html

The application notes here may help.
http://www.ftdichip.com/Documents/AppNotes.htm

Xiaofan

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