Lpc2000

Hi Matthias,

My project is to design a new SDIO card dedicated to a professional 
mobility application on PDA's. This card should work on any PDA brand 
under any OS. Of course the SPI data transfer mode seems the simplest 
way to use a "standard" micro instead of a dedicated SD/SDIO 
controller (like C-Guys' CG100 or Arasan's AC21C00)

Unfortunately, it seems as if SPI is not always supported by the 
device driver development kits on the host side. 1-bit and 4-bit 
modes are always supported. It looks as if the SPI mode would getting 
obsolete. Am I right ?

Regard,

Michel Kuenemann

--- In lpc2000@yahoogroups.com, Matthias Hertel 
<matthias.hertel@w...> wrote:
>
> Is there a special reason, why you want to do this? 
> Using the SPI does not consume that much CPU time, and is quite 
fast.
> As long as you do not want to use SDIO cards, I see no real reason 
using the 
> SD specific transfer modes.
> 
> Matthias
> 
> On Thursday 03 November 2005 00:43, kukbelz wrote:
> > Dear LPC2000 group and Philips,
> >
> >  Keils's MCB2140 Eval. Board demonstrates the use of the LPC214x 
as an
> >  SD host controller.
> >
> >  On the other hand would it be possible to use the LPC214x as an 
SD
> >  device controller implementing SPI, 1-bit and 4-bit SD data 
transfer
> >  modes as they are defined in the SD Card specifications ?
> >
> >  In this case what level of performance (clock speed) is 
achievable ?
> >
> >  Thank you.
> >
> >  Michel Kuenemann
> >
> >
> >
> >
> >
> >
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