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Posted: Mon Feb 18, 2008 12:57 pm
by free
CMD52 command is used for accessing 128k register space.Thats why you se e the excessive use of it. With CMD52 you can only access one register at the time.To read/write multiple registers you can use CMD53 command.

Posted: Mon Feb 18, 2008 3:12 pm
by a2retro

Hey seulater, your not the only guy after all ... which Spectec SDIO card are you working with?

Posted: Mon Feb 18, 2008 3:28 pm
by a2retro
I noticed that cardaccess-inc has now has another sdio AR6001 based option that can be used for development or production. ... =wlan_burt

This already has open source drivers as well.

Something to consider.

Posted: Mon Feb 18, 2008 7:58 pm
by seulater
Hey, thanks for the link. looks good but i am trying for low cost.
i am using the 820
i can get them all day long for $30

Posted: Mon Feb 18, 2008 11:28 pm
by a2retro
I just ordered the cardaccess-inc - CAW-SDIOG. I wil llet you know what I get with it. The power consumption is still higher then I would like it though ...

I hear you on the price. Problem is the shipping is sometimes more then the card on flea-bay.

I was compring specs on the SDW-820 vs SDW-821

My assumption (probably wrong) is that these are both spectec cards - ... 0211g.html

The 821 is attractive to me even if it costs a bit more as the power consumption is very low.

So the SDW-820 uses which chipset?

spectec SDW-823 and SWD-825

Posted: Tue Feb 19, 2008 3:37 am
by jconradt
For size and weight reasons I really prefer the spectec cards:

They offer mini and (soon to be released) micro cards. I assume (or better I hope ;)) they use the same chipset as your SDW-820, but I don't know. Is anyone interested in investigating in this card? Drop me a note and we can arrange something. I am absolutely willing to sponsor a few of such cards if you guys are looking into developing/re-engineering a driver! Let me know! I ultimately want to run the card *without* OS, so just a microcontroller/-processor and the card!

Best regards, Jorg

Posted: Tue Feb 19, 2008 3:59 am
by free
I think that Spectec uses Intersil PRISM chips in their cards

Posted: Tue Feb 19, 2008 5:13 am
by a2retro
From the embeddedworks web site it looks like the full sized b/g sdio card uses a MediaTek chipset.

Perhaps thats Intersil PRISM compatible?

Posted: Tue Feb 19, 2008 6:14 am
by seulater
those of you interested in playing, some guy has posted the data sheet for the Intersil Prisim data sheet for the Spectec 820 card on the web.
I too have gotten this document but i have an NDA signed with Spectec. He should not have posted it, so you need to nab it while you can, before they realize that its a NDA document and remove it.

sign up for here:
and go to the files section and get this pdf "PRISM Driver Programmers Manual.pdf " this doc will give you the register settings for the card.


Posted: Tue Feb 19, 2008 6:15 am
by jconradt
I once received a one line reply regarding chips from spectec.

>> As for the chip we used for SDW-825 or SDM-780, it is not Marvell or Atmel or Philips, but MTK.

Maybe that useful for anyone?

Regards, J

Posted: Tue Feb 19, 2008 11:21 am
by a2retro
it looks like the Embeddedworks sdio page is down at the moment but I see from the cached text that I misread the page. Sorry for the confusion. ... 0211g.html

The first card b/g is the spectec SDW-821 and uses a MediaTek chip - #unspecified.

The second card which I mistook for the spectec 802.11b card is actually a b/g card and uses the MediaTek MT5911

Has anyone taken the cover off the Spectec 802.11b card?

Posted: Tue Feb 19, 2008 11:27 am
by seulater
well, since i only have one to play with right now, im not doing it :wink:

Posted: Tue Feb 19, 2008 1:13 pm
by a2retro
I have just ordered the SDW-820 as well.

Which host platform are you working from?

Posted: Tue Feb 19, 2008 6:17 pm
by seulater
Right now i am using the LPC2148 board. ... cts_id=545

once i get all the comminication functions down, i plan to switch to the LPC2378, ya its a larger chip but its also cheaper. ... ts_id=8282

Posted: Tue Feb 19, 2008 7:50 pm
by a2retro
I haven't checked into it fully yet but I have a few options, listed in the most likely order I will attempt to get working

1) Use the AirDrop P I already have (didn't do much with). Get my Linksys CF card going with Fred's code and then try to adapt that to SPI.

2) Use a Olimex PC-H40 - LPC2106 module - (I guess I could try the code your working on with that module in parallel with my efforts).

3) Use a ATMega32 or AT90USB1267 Key (I was doing some work trying to get a USB based Zydas chip working a while back).

They are all a little shy in the flash department so I will have to see where this goes.