PEPS (Passive Entry & Passive Start System) keyless entry and keyless start system, this technology is widely used in vehicle access control keyless entry system, vehicle keyless start system, electric motorcycle proximity detection system and other application fields, to bring users a new experience that is both convenient and comfortable.
The main functions of the PEPS application are：
- PKE (Passive Keyless Entry) Passive Keyless Entry
- RKE (Remote Keyless Entry) Remote Keyless Entry
- IMMO (Immobilizer) anti-theft control system
The PEPS evaluation board scheme introduced in this article is mainly used to implement IMMO functions. Two development boards are used in this sub-case, namely the main control board based on NXP S32K116 and the low-frequency driver board based on NXP PJF7992. The main control board can drive OLED screens, LED lights, and user buttons. It is equipped with CAN, LIN, and UART connections. It is compatible with two unified high and low frequency interfaces and supports J-Link debugging. The low-frequency driver board is connected to an external antenna, which is both a transmitting antenna and a receiving antenna. When the battery is exhausted, it is charged close to the antenna through mutual inductance, which can achieve low-frequency authentication, thereby realizing the IMMO function in PEPS applications.
►Scene application diagram
►Product entity diagram
►Display board photo
►Plan block diagram
►Core technical advantages
1. It can be connected to an external low-frequency antenna driver board and a high-frequency receiver, and used to develop PEPS applications. 2. The use of S32K series chips conforms to the AEC-Q100 specification, which is conducive to the S32K series. Promotion of column chips
►Program specifications
1. Characteristics of S32K116 chip： ① ARM Cortex-M0+ up to 48Mhz； ② Flash / RAM - 128KB / 17KB； 外设 Peripheral resources: 2×16bit timer, 1× 32bit LP timer, RTC, 1 x LPSPI, 2 x LPUART, 1 x FlexCAN, 1 x16 (12-bit) ADC 2. Features of PJF7992 chip： ① Integrated single-chip base station ② Integrated powerful programmable antenna driver/modulator 集成 Integrated LIN transceiver (the physical layer is compatible with 0 and SAE J2602, compatible with lin1.3) ④ Support single-line communication ⑤ High-performance adaptive sampling time AM/PM demodulator ⑥On-chip clock oscillator and frequency divider in the case of external clock reference 天线 Antenna open circuit and short circuit detection ⑧Low power consumption and ultra-low power standby mode
