Embedded SD Standard

The SD Card Association (SDA) recently introduced the Embedded SD standard for storage devices in November. The Embedded SD specification extends the widely adopted, market-proven SD interface to embedded storage, doubling device storage potential and easing platform design in mobile handsets and consumer electronics devices. The Embedded SD standard regulates the specifications of SD interface-based embedded flash devices, easing the integration of storage devices and avoiding market fragmentation in the mobile and CE industries.

As next-generation mobile handsets and CE devices demand high-capacity embedded storage and flash management solutions, Embedded SD simplifies system engineering by leveraging well-known SD standards. It allows all removable, embedded storage devices and input/output (I/O) peripherals to utilize the same common interface. Embedded SD separates flash management from the host and provides manufacturers and consumers with the flexibility of up to 32 GB scalable high-capacity on-board memory, plus 32 GB of removable memory with any SD High-Capacity memory card.

The Embedded SD specification defines the mechanical and electrical framework of the new embedded form factor and is also focused on enabling advanced functionality in embedded storage devices. Embedded SD devices offer a smart system solution with a smooth migration path from legacy designs, reduced design complexity and support for code, applications and user data storage.

To speed adoption of Embedded SD, support of boot functionality requires only minor changes in the host ROM code of currently mass deployed baseband, application and multimedia processors with minimal additional changes to block device driver to support the additional functionality of embedded SD.

Embedded SD Standard

  • Fully Compatible with SD standard
    Embedded SD is fully compatible with the industry leading SDHC (SD 2.00) interface, ensuring a seamless migration from current SD to Embedded SD designs
  • Both 3.3V and 1.8V Power Supplies
    Supported for both flash and I/O power sources
  • Boot from Embedded SD
    Reliable and secure storage of boot code on an Embedded SD device reduces the number of memory components in a design, as well as the number of busses required, enabling more efficient designs
  • Flexible Partition Mechanism
    Allows multiple physical partitions accommodating varied data sources such as boot code, OS, applications and multimedia content with customizable levels of protection for each partition. Original equipment manufacturers, mobile network operators and content providers gain optimal flexibility and control to configure the Embedded SD device for different usages and data types
  • Protection Mechanism
    Flexibility to separately configure each physical partition with different read and write/erase protection modes
  • Data Robustness
    Optional configuration of each physical partition of the Embedded SD device, including full immunity to power failure and protection of critical data (boot code, operator data, etc.)
  • Power-Saving Sleep Mode
    Option to customize power needs and reduce power consumption and boost battery life

More info: SD Card Association