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Memory controllers enable AES-compliant USB data transfers

Posted: 21 Feb 2007     Print Version  Bookmark and Share

Keywords:flash  HDD  USB  IntellaSys  memory controller 

IntellaSys expanded its OnSpec memory controller line with two devices—the xSil267 and xSil268—that are designed to enable secure and rapid USB data transfer from storage devices such as flash and HDD media.

The xSil267 controls serial-only, multi-slot applications such as those in which Secure Digital (SD), MMC and Memory Stick (MS) media interface with a PC Express Card adapter or USB Host. And the xSil268 controls both serial and parallel interfaces for multi-slot applications enabling it to read from a wide range of media formats, including UDMA CompactFlash (CF), MMC 4.1, SD 2.0 and IDE/ATAPI HDD as well as their variants.

The xSil267 and xSil268 feature a 128bit, hardware-embedded, encryption/decryption function that can be enabled via firmware. This is a key feature for applications in which a specific media is used and partitioned to store encrypted information.

Fully compliant with the Advanced Encryption Standard (AES), this security feature is augmented by two-level software authentication of passwords. According to Bryan Chin, OnSpec product marketing manager, any unauthorised attempts to decipher the 3.4x1038 keys embedded in each chip at the rate of one key per second would take 149 trillion years to determine all possibilities.

Designed with integrated USB 2.0 PHY, both xSil267 and xSil268 pack a 16bit processor along with a serial EEPROM port, two general purpose timers and a watchdog timer. Each device supports both Reads and Writes for SD-HS compliant media with sustained transfer rates exceeding 20MBps as well as MS PRO media with sustained transfer rates of up to 18MBps and MMC cards that have 4bit and 8bit buses with sustained transfer rates of up to 20MBps. Both devices also provide programmable R/W widths plus optimally controlled hardware transfer for speed and scalability.

The xSil267 is packaged in a 48-pin 16-by-16mm QFP while the xSil268 comes in a 100-pin 16-by-16mm QFP.

OEM pricing information is being disclosed only to qualified manufacturers. Both devices are in production and now sampling along with evaluation boards to qualified OEMs.

- Ismini Scouras" target="_blank">Ismini Scouras

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