An engine immobilizer system embeds a chip in the ignition key, with a globally unique ID programmed into the chip at the factory. The vehicle can only start once the key chip ID that has been read matches the engine ID and passes authentication by a specific security algorithm. It effectively prevents illegal hot-wire starting.
Solution Overview
This solution uses NXP's PCF799x series LF chips. With only a very small number of external components, a complete LF base station system can be built, making it a highly integrated base station system solution.
Recommended MCU
- S32K144 series
- KEAZ128 (alternative)
- S12 series (alternative)
Recommended Devices
- PCF7991
- PJF7992 (alternative)
Core Components
- Automotive MCU: S32K144 (NXP)
- Automotive MCU: KEAZ128 (NXP)
- Automotive MCU: KEAZ64 (NXP)
- LF base station chip: PCF7991 (NXP)
- LF base station chip: PJF7992 (NXP)
- Transponder: NXP, full part number available on request
- Key chip: NXP, full part number available on request
- LIN transceiver: NXP, full part number available on request
Applications
Automotive IMMO modules, motorcycle PKG base stations
Reference Design ABIC1 DEMO: PCF7991 H001
- LF driver: PCF7991
- Reserved CAN/LIN interface
- Two reserved LF drive channels
- Reserved 2910 HF interface
- Suitable for evaluating automotive IMMO solutions
- Suitable for evaluating motorcycle PKG solutions
- Complete hardware design documentation
- Complete software design documentation
Reference Design ABIC2 DEMO: PJF7992 H001
- LF driver: PJF7992
- LIN single-wire control, reserved SPI interface
- Suitable for evaluating long-range automotive IMMO solutions
Functional Block Diagram
