I just heard some interesting news out of the SD Association. They have confirmed a new dual-row memory card design as part of the emerging SD 4.0 standard. Here's what the association says:
“New high speed interface signals will be assigned on the second row of pins of select SDXC and SDHC memory cards offering the new speed. This option will be available in both full-size and micro form factors and does not change the physical size or shape of the cards. This design will be part of the forthcoming SD 4.0 specification, expected in early 2011.”
The really good news about this is that the designs are fully backwards compatible, meaning a device designed with SD 4.0 would also support SD, SDHC, and SDXC memory cards.
The plan is for these cards to now support better transfer rates for high-definition video. In fact, the design is said to achieve bus interface speeds of up to 300MB/s.
Is this a timely development? Any concerns about it? Will it help in your next design?
If you happen to be at IFA in Berlin this week, the SD Association promises to have more than 40 products on display, including some based on SDXC.