Lpc2000

Hi Matthias,

 The max. SPI rate is 7.5MHz (PCLK/VPBDIV = 60MHz/8)

Andreas

--- In lpc2100@yahoogroups.com, Matthias Weingart <lpc2100@p...> wrote:
> On Sat, Feb 07, 2004 at 03:27:23AM -0500, J.C. Wren wrote:
> > The SD/MMC card connector will support the physical SD card.  I had 
> > planned on only supporting the SPI mode, but there's several
uncommitted 
> > I/O lines on the processor, so I may wire those up (with jumpers, of 
> > course) to support SD mode.
> 
> Some comments to SD and MMC cards. In SPI mode all commands from the
SD mode
> are also available. One-Wire SD mode has the same speed as the SPI mode.
> (3.125MBit/s burst rate at 25Mz clock). You can speed up this to
12MBit/s by
> using the 4 data lines in 4bit SD mode, but I guess this can not be
done by
> using simple IO-Pins, or timer inputs/outputs (much too slow).  With no
> additional hardware the SPI-mode of the SD card is the best solution
for the
> lpc21xx. And I doubt that you can use it at the full speed. (What is the
> max. frequency of the lpc21xx SPI?).
> 
>         Matthias