New SD card standard 'SD 8.0' has been introduced, and PCI Express 4.0 has been adopted to achieve a transfer rate of up to 4GB / s.


Association, which leads the standard design and development of SD cards, has announced a new standard ' SD 8.0 ' that achieves a transfer rate of up to approximately 4GB / s by adopting the PCI Express 4.0 (PCIe 4.0) standard.

SD Express Delivers New Gigabyte Speeds for SD Memory Cards | Business Wire

“SD Express” SD memory card standard with new gigabyte speed specifications

Full-size 'SD Express memory card' compliant with SD 8.0 standard uses NVMe Express (NVMe) upper layer protocol for state-of-the-art memory access mechanism, while maintaining backward compatibility doing.

Mats Larsson, senior market analyst at market research firm Futuresource , said, `` SD Express takes advantage of faster PCIe and NVMe architectures to increase transfer speeds, further expanding the number of devices that use SD memory cards. `` By combining reliable standard technology, it will be possible to easily take advantage of removable storage media in new ways in future product design, '' SD 8.0 introduces PCIe 4.0 and NVMe. Explains the significance of adopting.

In addition, with the high transfer rate of 4 GB / s of SD 8.0, it is possible to transfer larger amounts of data than ever before. SD that adopts SD 8.0 standard even for shooting ultra-low-speed movies, 8K videos, 360-degree movies, etc., speed-sensitive applications running on SD cards and mobile terminals, evolving game systems, multi-channel IoT devices, etc. Cards will play an active role.

Hiroyuki Sakamoto, President of SD Association, said, 'By dramatically increasing the speed of SD Express memory cards, we will increase the choice of storage media provided to device manufacturers and system developers.' 'SD 8.0 enables removable memory cards The possibilities for ultra-high performance solutions using will also increase. '

Also, Al Yanes, president and chairman of the PCI-SIG, which sets the PCIe standard, said, 'PCI-SIG is the highest-end removable memory card, SD memory card We welcome the adoption of the standard PCIe 4.0 interface and dual lanes. '' Compliance tests for PCIe standards are available from major test equipment vendors, and companies looking to adopt new PCIe technology will benefit greatly. I will get it. '

SD 8.0, which can increase the maximum transfer rate of SD Expres to about 4GB / s, uses PCIe 4.0 and NVMe up to version 1.4. The SD 8.0 standard will offer two types of transfer rate options for SD cards, each with a transfer rate of up to 2GB / s for PCIe 3.0 × 2 or PCIe 4.0 × 1 architectures and up to 4GB / s for PCIe 4.0 × 2 architectures. To achieve The SD card adopting the PCIe 4.0x1 architecture uses the form factor defined by the SD 7.0 standard and realizes a transfer rate of up to 2GB / s with two rows of pins. Note that for architectures that support dual PCIe lanes, the number of pins is 3 rows.

It should be noted that the SD Association makes it easy for companies adopting the SD 8.0 standard to deploy SD Express to use existing test equipment and reduce product development costs. The SD 8.0 standard allows system developers to take advantage of PCIe and NVMe technologies such as multi-queue host memory buffers that do not use a

bus mastering lock mechanism.

Technical details of the SD 8.0 standard can be found in the two white papers below.

SD Express Memory Cards with PCIe and NVMeTM Interfaces

SD Express and microSD Express Cards: The Best Choice for Your Future Product Designs

in Hardware, Posted by logu_ii