What has faster data transfer, MMC or SD card?

Status
Not open for further replies.
S

SolarTorch

Member level 3
Joined
Oct 7, 2004
Messages
62
Helped
4
Reputation
8
Reaction score
2
Trophy points
1,288
Activity points
413
Re: MMC and SD

Is there anyone know MMC and SD card which one has a faster data transfer speed (read and write)?
 

Re: MMC and SD

I recommand you tu use Atmel data flash... h**p://w*w.atmel.com/dyn/products/product_card.asp?family_id=616&family_name=DataFlash%26reg%3B&part_id=1883

It's only 8MB but fast... and work on SPI bus like MMC&SD,

Another strategy is to use some static or dynamic ram and buffer data inside; when the process become noncritical, you have to save the buffer in sd card...
The best device for do this job is an FAST FPGA... SDRAM+FPGA (sdram core+spi core+glue logic)+SD Card = voyla you have a fast SD card...

Hope this help,
//a
 

Re: MMC and SD

Thanks a lot aNdreiBuuu.
I want to know more about how fast the MMC and SD they are. Is there anyne can help?
 

Re: MMC and SD

SD is faster the MMC but it also depend on how the card is acceced. I was just searching for somthing simular and found this link, to a document describing just the speed of MMC/SD cards, it also was a great introduction to how you can acces them.

Understanding Secure Digital I/O Performance in Systems and Cards
https://www.windowsfordevices.com/files/misc/SDIO-whitepaper.pdf

re Me
 

Re: MMC and SD

On paper, SD is faster than MMC. But in practice, transfer rates are most of the time limited by the reader itself.
 

Re: MMC and SD

SD is faster and more secure ...
 

Re: MMC and SD

MMC 4.0 is 52MHz x 8bit = 418Mb/s,
SD 1.1 is 50MHz x 4bit = 200Mb/s,
so, MMC 4.0 is fast than SD 1.1.
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…