Passive Keyless Go (PKG) is an excellent fit for premium motorcycle systems. On a vehicle equipped with a PKG system, the owner only needs to carry the key fob — without taking it out — to unlock the steering lock, start the vehicle and perform other operations. The system not only improves the anti-theft performance of the motorcycle but also makes it more comfortable and convenient to use, giving riders an entirely new driving experience.
Solution Overview
The PKG base station uses the NXP PCF7991 for LF transmission and IMMO. The device supports IMMO/PKG antenna multiplexing, delivering an IMMO communication range of 4~5cm and an LF range of up to 2m. HF reception uses the NXP NCK2910, which supports autonomous time-shared polling across multiple frequency points. Depending on the requirements of the design, the main MCU can be chosen from the NXP S9S08DZ, S9S12, SKEA or S32K families.
The smart key is built on the NXP NCF29A1 family, which integrates a 3D LF driver, an HF transmitter and a hardware cryptographic unit, with a built-in MRKIII-e 16bits secure core and Transponder compatibility. The external circuitry is simple and requires only a very small number of peripheral components, making it a highly integrated single-chip solution.
Recommended MCU
- S32K144 series
- KEAZ128 (alternative)
- S12 series (alternative)
Recommended Devices
- PCF7991
- NCF29A1
- NCK2910
- NCF29AE (alternative)
- NCF29A7 (alternative)
- NCF29A3 (alternative)
- PCF7952 (alternative)
- PCF7953 (alternative)
- NCK2912 (alternative)
- NCK2913 (alternative)
Core Components
- Automotive MCU: S32K144 (NXP)
- Automotive MCU: KEAZ128 (NXP)
- LF base station IC: PCF7991 (NXP)
- HF IC: NCK2910/NCK2912 (NXP)
- Key IC: NCF29A1 / NCF29AE / NCF29A7 / NCF29A3 (NXP)
- Key IC: PCF7952 / PCF7953 (NXP)
- SBC: NXP, full part number available on request
- EEPROM: Fudan Micro, full part number available on request
- Crystal: JYEG, full part number available on request
Applications
Motorcycle PKG, one-button start for electric vehicles
Reference Design PKG base station evaluation board: PCF7991 H001
- LF driver IC: PCF7991
- HF receiver IC: NCK2910
- 1 x multiplexed IMMO/PKG antenna interface
- CAN interface
- LIN interface
- 2 x LF antenna interfaces reserved
- Complete hardware design documentation
- Complete software design documentation
Reference Design PKG remote key evaluation board: NCF29A1 H001
- NCF29A1 single-chip solution
- 4 buttons reserved
Functional Block Diagram
