The General Assembly Shiping Group launched a PEPS keyless entry and start system solution based on NXP products

The main control chip S32K144 of this program is an automotive-grade general-purpose MCU launched by NXP based on the ARM Cortex-M4F core. The product has a DSP instruction set and a single-precision floating-point processing unit (FPU), the maximum frequency can run up to 112MHz, with extremely high computing capabilities, and can provide computing power equivalent to the 150MHz PowerPC e200z4 core. In addition, S32K144 can provide rich peripheral interfaces and functional scalability.

On December 14, 2021, the leading distributor of semiconductor components dedicated to the Asia-Pacific region-General Assembly Holdings, announced that its subsidiary World Ping will launch keyless entry for cars based on NXP S32K144, NJJ29C2, NCF29A1 and NCK2912 chips And start the system solution.

The General Assembly Shiping Group launched a PEPS keyless entry and start system solution based on NXP products
Figure 1-Display board diagram of the PEPS keyless entry and start system solution based on NXP products of the General Assembly of the United Nations General Assembly

Under the iteration of various technologies, automotive applications are innovating at an unimaginable speed. Among them, the car keyless entry and start system referred to as PEPS (Passive Entry Passive Start) system has brought convenience and comfort to car owners while further improving the safety of the car. The system consists of a controller, radio frequency (RF) transmitter and receiver, etc. When the key is in the effective range, the owner pulls the door or presses a key to start the switch, the corresponding module will send a terminal signal to wake up the main controller and start the entire communication process. And in the process, you can open the door or start the engine without using a key.

The keyless entry and start system solution for cars based on NXP’s S32K144 master MCU, NJJ29C2 low-frequency driver, NCF29A1 chip, and NCK2912 UHF receiver by the General Assembly Shiping can provide customers with an excellent car experience.

The General Assembly Shiping Group launched a PEPS keyless entry and start system solution based on NXP products
Figure 2-Block diagram of the PEPS keyless entry and start system solution based on NXP products of the General Assembly of the United Nations General Assembly

The main control chip S32K144 of this program is an automotive-grade general-purpose MCU launched by NXP based on the ARM Cortex-M4F core. The product has a DSP instruction set and a single-precision floating-point processing unit (FPU), the maximum frequency can run up to 112MHz, with extremely high computing capabilities, and can provide computing power equivalent to the 150MHz PowerPC e200z4 core. In addition, S32K144 can provide rich peripheral interfaces and functional scalability.

In terms of low-frequency drive, the NJJ29C2 used in this solution is a base station chip suitable for keyless entry/start (PKE/PKG). It has built-in 5-9 LF drives and has a very high starting ability. And supports the wake-up input (WUP) function related to the battery voltage. These functions are used to connect the door handle interface to the LF base station to ensure a short delay between the door handle and LF transmission.

In addition, this solution embeds the NCF29A1 chip in the smart key terminal. The chip uses the HVQVN32 package to combine the keyless system (PKE), the remote radio frequency transmitter and the anti-theft locking system, which can be completely new in smart phones and smart watches. The key shape and size of the key to support the improvement of the car access control system through mobile devices. And on the car side, the program uses the NCK2912 high-frequency receiver to ensure real-time communication.

The General Assembly Shiping Group launched a PEPS keyless entry and start system solution based on NXP products
Figure 3-Scenario application diagram of the PEPS keyless entry and start system solution based on NXP products of the United Nations General Assembly Shiping

With the use of these high-performance devices, this solution can realize functions such as car key ID storage, keyless entry (PKE), keyless start (PKG), car anti-theft (IMMO), and remote control (RKE).

Core technical advantages:

• Integrated dual IMMO function, supports up to 9 LF antennas;
• It can transmit encrypted high-frequency signals, and the maximum LF drive current is 2.5A;
• NCF29A1 has superior LF (low frequency) sensitivity, and low power consumption can reach uA level;
• The key can be located via RSSI, which conforms to the HT-3 encryption protocol;
• Support RF frequency hopping communication.

Scheme specifications:

• Realize the complete IMMO/PKE/PKG/RKE function of the base station, and Display the status on the Display;
• Realize the display of RSSI value;
• Antenna diagnosis and impedance test, and display the results, support SWD interface;
• The communication distance between the key and the base station PKE can be 3-4m;
• The communication distance between the key and the base station RKE can be more than 20m.

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