Atmel Connects Single-chip AES-128 Immobilizer and Remote Keyless Entry Microcontroller for Combi-Key Applications

Atmel's new ATA5795 device incorporates an AES-128 immobilizer interface, an ultra-low power AVR® core and a fractional-N RF transmitter in a single IC, covering 315 MHz and 433 MHz frequency bands. The built-in AES-128 cryptographic engine, along with the Atmel protocol stack, provides very high security protection with fast authentication time which is critical to immobilizer systems. Both immobilizer and RF transmitter interfaces have access to the AES-128 engine allowing similar security schemes for both functions.

On top of the AES-128 cryptography, Atmel's ATA5795 includes a complete open immobilizer protocol stack with configurable authentication schemes to accommodate a wide range of security level requirements. The device features 8K-bytes Flash and 2K-bytes EEPROM for application and user data storage. The tiny QFN 5 mm by 5 mm package allows small footprint designs at optimized cost.

While Atmel provides a complete immobilizer stack, the innovative open architecture allows for implementing any existing protocol that is backwards compatible with existing systems. The immobilizer physical interface is embedded in the device and is compatible with all major base stations available on the market. This allows for rolling-out cost effective fob designs without any base-station redesign.