5 System Operation

The system includes the following features:

  • Immobilizer functionality:
    • Supports OIP
    • Support for AES-128 encryption
    • Passive fob authentication supporting Unidirectional Authentication (UA)
    • Support for base station to transponder key learn sequence used during the learning procedure
    • Support for several utility immobilizer commands (such as communication or transponder data management)
  • RKE functionality:
    • Support for unidirectional AES based rolling code protocol
    • Use of multiple channel UHF messaging provides robustness against the effects of multipath or in-band interference
  • PEPS wake-up functions:
    • Selectable LF driver coil
    • Selectable LF driver current (ICOIL = 50 mA to 1000 mA)
    • LF driver polling support
    • Configurable preamble and header settings for LF wake-up via source code updates
    • Unidirectional UHF data return channel included
  • UWB functions:
    • ToF distance measurement is performed with every PEPS command sent from the vehicle to the fob
    • Relay attack notification provided in every PEPS response