2 GB MMC card

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Hi All

I have seen that the new 2GB MMC 4 card has been released by Pretec?

It is ment to be the fastest flash memory in the world. hear are the speeds:

Read: 22.5MB/s
Write: 18MB/s

Does any one know if this new MMC 4 cards will work in our XDA II's it says it should work in most SD/MMC slots around today... but regarding speed do you know if we would see any speed increases from SD with this new MMC???

http://www.pretec.com

from tests at least with sd cards the xda2 dont handle all that well compare to most other pocketpc's also worse then xda1 which dont use
the poor internal sd interface that xcale have

you can benchmark using pocketmechanics

and try doing a search people have been posting benchmarks they made with the xda series

Thanks for the reply Rudegar...

Does any one else know any info on the new MMC 4 cards???

well i would asume that they should work

but are they not a bit on the expensive side ?
i mean even with the extre speed if it would help
their price are pretty high
compared to some a few 256MB sd cards
and i dont have any serious issues even with my really really really
slow sandisk sd cards

Die MMC 4 Standard defines 4bit in parallel for data-transmission while AFAIK the MMC has only 1 bit data serial for data.

So it is likely, that it will not work.

Alex

but i'm pretty sure that sd also use 4bit in parallel

but i think the problem with the xda2 is that it's internal xcale interface is a mmc interface which is compatible with sd not the other way around
this is also one of the reasons the xda2 have a slower sd interface then xda1 where it have an external chip because the arm200 dont have that mmc internal interface like xcale400

So MMC are not necessary slower than SD?

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Hi...

after reading about the new pretec card I went back to read the articles/posts regarding the difference between MMC and SD...

http://asia.cnet.com/reviews/handhel...08492-2,00.htm

http://forum.xda-developers.com/view...t=7901&start=0

http://forum.xda-developers.com/view...ghlight=sd+mmc

So, if I undestand well now, MMC are not necessary (by definition) slower than SD (this Pretec is faster than the Panasonic?) and not necessary smaller than SD... the only difference boils down to the SD feature...

Rudegar (first all thank you for all the help you are giving in this forum... you are of great example! :wink: ) what do you use your SD card for? In particular, do you watch compressed movies on your XDA without any problems in term of speed?

Finally on SD vs MMC...:
-why do u think Pretec made the 2GB card MMC instead of SD?
-why do you think expansys is pricing MMC higher than SD (look at 256 and 1GB)
http://www.expansys.com/d_storage.asp
so it is not even true that MMC are cheaper than SD...

Mentioning Expansys... what are the best places on the web:
-with widest variety (expansys has recently cut a lot... there are no Panasonic etc... anymore...)
-with the past price (I want to buy one finally!!!)

Thanks,

Chris

i use my sd card mainly for music and a few programs that eat too much space and ebooks and a few video's mainly to brag :P

in terms of speed then i sometimes get nonsync audio on larger video clips
and when i tried journalbar i had sound clickings so i had to turn it off to listen to music (but i'm not 100% sure that was because of sd speed and not just journalbar acting strange)

and then of cause i use my sd for getting files from a pc that dont have a cradle or other sync cable
using the sandisk cruzer if it dont have a sd reader already

I find my battery goes down much faster with the 256Mb SD card plugged in - would a faster 2Gb MMC card require more power, 1. for higher transfer speeds and 2. for keeping powered up?

Thank you Rudegar!

Good point Madkat...
maybe some with a 1GB memory card who has tried the 256 before can answer us... but I think it would be easier if you open a new thread... something like "SD Card bigger = more power consuption?"