SanDisk 4GB micro SDHC Memory Card for Product Manual - Page 6

SanDisk microSD™, microSDHC™ and microSDXC™ cards 1 INTRODUCTION OEM Product Manual 2.5 1.1 General Description The SanDisk® microSD™, microSDHC™ (High Capacity) and microSDXC™ (Extended Capacity) cards are flash based removable non-volatile memory devices specifically designed to meet the security, capacity, performance and environmental requirements inherent in next generation mobile phones and consumer electronic devices. The SanDisk microSD card is based on the SD™ Card specification. The SanDisk microSD card includes a content protection system that complies with the security of the Secure Digital Music Initiative (SDMI) standard and has a higher memory capacity. In the SanDisk microSD card, card content is protected from unauthorized use by mutual authentication and a cipher algorithm. Unsecured access to the user's own content is also available. microSD cards are based on a 8-pin interface designed to operate in a maximum operating frequency of 100 MHz. The interface for microSD card products allows for easy integration into any design, regardless of which type of microprocessor is used. In addition to the interface, microSD card products offer an alternate communicationprotocol based on the SPI standard. SanDisk microSD card Product Family provides up to 64 gigabytes (GB)1 of memory using flash memory chips, which were designed especially for use in mass storage applications. In addition to the mass storage-specific flash memory chip, cards in the microSD Card Product Family includes an on-board intelligent controller which manages interface protocols; security algorithms for content protection; data storage and retrieval, as well as Error Correction Code (ECC) algorithms; defect handling; power management; wear leveling, and clock control. Figure 1: SanDisk microSD Card Block Diagram January 2012 Version 2.5 © 2008 - 2012 SanDisk Corporation. SanDisk Confidential, subject to all applicable non-disclosure agreements 1