Compact Flash (or SDRAM) to SPI interface

interface?

CF is quite fast but transfer speed will be decrased by SPI. That's why it's better to use MMC cards,which can work without problems with SPI bus.

Dominik Domanski d_domanski@NO_SPAMtlen.pl

"Dominik Domañski" wrote in news:dkvu3u$t4f$ snipped-for-privacy@srv.cyf-kr.edu.pl:

I certainly recognize that SPI is going to limit the transfer speeds possible. The advantage to SPI is that it is available. The other possibility from my perspective is a high speed serial port (SPORT, not a UART).

I want to interface to a DSP where I don't have a parallel data bus available.

Ah, Blackfin.

You might consider using a PIC? There are a number of CF designs (hardware and software) floating around for a PIC (e.g.

Andrew

"Andrew Jackson" wrote in news: snipped-for-privacy@eclipse.net.uk:

I looked at MMC/SD cards for the first time today. These cards are incredibily easy to interface with a SPI port. I guess I will probably forget about CF cards.

I also was referred to a part (Fatfile) that Saelig

Thanks for all the comments.

"Andrew Jackson" wrote in news: snipped-for-privacy@eclipse.net.uk:

Close, actually SHARC.

I thought of this idea as well but I think I would probably use an FPGA instead just to make the interface fast. The advantage to CF is that it can be much faster than MMC. With a SPORT, I can transfer raw data at

You also minimize the amount of extra circuitry that you need.

That's neat: ARM not PIC.

Andrew

Yes, I should have read your website first.

When I used CF cards I found quite a wide variation in the (write) speeds: ultimately you are dependent on the controller on the card.

Andrew