Got X-Scale? Got SD? You have SDIO!

Well I hope that is the case. I just hope Dell didn't "wire" the unit so it wouldn't work to save money.

[Forge]

Here's to hoping for the best

[Tom61]

Hmm... awhile back someone on another forum posted that they asked a tech at Dell about the IO capabilities of the Axim, and the tech replied that only SDIO devices by Dell are guarantied to work. I posted about that here earlier, but everyone just threw back the line about the line about it being only SD memory slot.

One problem with this statement though:

The PXA250 chipset has built-in support for 1-bit (SDIO) SD!

I was under the impression SDIO was 4-bit not one.

I wish SDIO cards were more prevalent, that way someone would have easy access to try it.

[Mike C]

If you have CFIO, why do you want/need SDIO?

Originally posted by Mike C@Jan 16 2003, 05:00 PM
If you have CFIO, why do you want/need SDIO?

What if you wanted to have wi-fi and a camera at the same time?

[pigface]

Originally posted by cageyjames@Jan 16 2003, 06:01 PM

Quote:

Originally posted by Mike C@Jan 16 2003, 05:00 PM If you have CFIO, why do you want/need SDIO?

What if you wanted to have wi-fi and a camera at the same time?

To be flexible?

[Tom61]

Originally posted by pigface@Jan 16 2003, 06:05 PM

Quote:

Originally posted by cageyjames@Jan 16 2003, 06:01 PM Quote: Originally posted by Mike C@Jan 16 2003, 05:00 PM If you have CFIO, why do you want/need SDIO? What if you wanted to have wi-fi and a camera at the same time?

To be flexible?

Wifi and Bluetooth at the same time
Camera and 1 Gig microdrive

[ARM Hacker]

As long as they're using the on-chip components, every PDA with a PXA-250 should have the same CF, SD, USB, etc. This is because the PXA-250 is a SOC (system on chip) processor, its the XScale core but all those other items are actually ON the same piece of silicon, inside the package. I know of some PDA's (like the Clie NX70) that actually use a different type of external CF controller, in which case its not guaranteed to work the same. But what it does mean is software should hopefully be fairly device independent when it comes out (to support SD peripherals for instance)

[commoved]

I know a good way to find out. Anybody have an SDIO card? A lot of SDIO cards stick out, and I'm not to anxious to have a card sticking out of the side of my Ax. But it would be an interesting experiment.

[Mike C]

I guess I'm just not thinking of all the stuff the PPC is capable of doing. I can see now that just having IO capability for both slots will increase the machine's usefullness.

I'm going to need a bigger gadget bag now.

[The_Grim_Retard]

Someones gotta have a SDIO card that was for there old PPC that they can try and stick in there axim

I would suggest having a look at the following Intel PXA250 CPU document (the PXA255 version is embedded in a huge CPU PDF document..) :

ftp://download.intel.com/design/pca/...278533-001.pdf

Look at pages 7 and 8 - there are technical differences between SD card and SDIO card connections.

However, on page 9...

"During the design phase, the decision between an MMC or SD Memory Card socket must be made. An MMC socket only supports an MMC card, while an SD Memory Card socket supports an SD Memory Card, an SDIO card, or an MMC card."

My mate at Arm Holdings said that the PXA250/5 CPUs do support SDIO as standard, but it's up to the PDA manufacturer if they set their SD socket up to handle it...

Confused?

yes..... :rolling:

[Shokpin]

I'd like to point everyone to this thread where Ikehiker and I tackled the issue of SDIO a bit.

Results:

-XScale Processors are able to handle SDIO.

-"MediaQ chips that are used in AXIM, Tosh e310/e330, Casio E300 all have the MQ1132 part which support full 4-bit SDIO. The problem has been the SD cards themselves have been supporting only 1-bit and most of them use SPI type of interface and not true SD"

-[on the topic of wiring] "So whether SDIO works depends on what the designer of the respective Pocket PC did (or drank ). You cannot be sure that IRQ is connected at all to the CPU. And even if it is it might be on a different GPIO pin than in other PPCs. That would make writing a "generic" SDIO driver for all XScale PPC rather difficult I guess."

[Raptor_dss]

Alright im getting confused with all the technical jargon being thrown about that i only understand the basics of- so if someones writes the drivers will it be possible or not?