Tag Archives: LF

Accessing your vehicle with Atmel

The automotive industry has certainly come a long way since Henry Ford’s Model T first rolled off the assembly line in 1908. To be sure, car (access) keys have radically evolved from the simple, unassuming steel key of yore to acting as the human interface to a vehicle.

Photographed at the Bay State Antique Automobile Club’s July 10, 2005 show at the Endicott Estate in Dedham, MA by Sfoskett

Similarly, Atmel’s automotive portfolio has also rapidly evolved since 1997 when we introduced our very first dedicated car access transmitter.

Indeed, Atmel now offers a wide range of car access devices that are ideal for developing complete system solutions with the highest levels of security and convenience, supporting remote keyless entry, immobilizer, passive entry/go or combi key applications.

“Remember, providing a high level of security is a must for car access applications, something which is also required by insurance companies worldwide,” an Atmel automotive engineering rep told Bits & Pieces.

“And that is why Remote Keyless Entry (RKE) systems combined with immobilizers are standard in nearly all cars today, while passive Entry/Go (PEG) applications offer the ultimate convenience for car users and are well-established in current luxury vehicles.”

Unsurprisingly, such features are increasingly making their way into medium-class cars. To meet these demands, developers require cost-efficient electronic system solutions that support a high level of integration.

As such, Atmel offers a comprehensive line of ICs (RF, LF, Atmel AVR microcontrollers) to create complete car access and remote start systems, along with dedicated RF transmitters, receivers and transceivers, as well as microcontrollers.

atmelcaraccessdiagram1

In addition, Atmel enables a uni-directional RF link for the keyless entry function to open or lock the doors. The immobilizer system is built with a bi-directional LF link operating with the AUT64 crypto algorithm.

And last, but certainly not least, Atmel supports a bi-directional RF link for the RKE function as well as for the extremely secure duplex RF link in a Passive Entry Go system. The lF link is used for the wake- up channel in a PEG system and the immobilizer function to start the RF communication.

atmelcaraccessdiagram2

Interested in learning more about Atmel’s expansive automotive portfolio? Be sure to check out some of our related blog posts from earlier this week, including “A closer look at Atmel’s vehicle portfolio,” “Atmel expands MaXTouch auto lineup,” and “LIN networking for the automotive masses.”