FET-MA35-S2 SoM: A Multi-core Secure Industrial-grade Solution for EV Charging Pile TCU
Charging piles provide electrical energy for electric vehicles (EVs), converting grid power for fast and safe charging. As EVs become more popular, charging pile construction is increasingly important. TCU is the core control module of the charging pile, undertaking key functions such as charging process management, safety monitoring, data interaction, and billing control. As the hub connecting the vehicle, the grid, and the operation platform, the TCU effectively manages the charging process by integrating various functional modules.
TCU Core Functions:
Control & Communication
Supports multiple interfaces for real-time interaction with the vehicle’s BMS, charging modules, and cloud platforms.
Safety Protection
Real-time monitoring of equipment voltage, current, temperature, and other status, abnormal conditions trigger the protection mechanism and report fault codes; hardware support for secure encryption to protect payment and data privacy and security.
User Interaction
Display charging progress, cost, abnormal alarm information and other multi-mode interaction through LCD/HMI interface; record charging process data to provide data support for equipment maintenance and energy efficiency optimization.
As the "intelligent brain" of the charging pile, TCU must realise core functions such as charging control, data communication, safety monitoring, and human-machine interaction. With its high-performance multi-core heterogeneous architecture and rich interface design, the embedded FET-MA35-S2 SoM can be used as an ideal hardware platform for charging pile TCU.
1. Multi-Core Heterogeneous Architecture Architecture
Dual-core A35 + M4 collaborative control: It is equipped with 2 x 64-bit ARM Cortex-A35 (main frequency 800MHz) and 1 x Cortex-M4 (180MHz), running Linux system and real-time operating system respectively, and meeting the requirements of high efficiency and real-time control.
Application Scenario Adaptation: A35 kernel handles the main control logic of the charging pile (e.g., billing, communication protocol parsing), and M4 kernel monitors the voltage/current parameters in real time to ensure the safety of the charging process.
2. Interface Expansion
The SoM uses LCC + LGA packaging (48mm×40mm), with all 260 pins led out. It can support 17 x UART interfaces and the protocol conversion between RS232 and RS485. It can be directly connected to devices such as electric meters, barcode scanners, and card readers without the need for additional conversion chips. 2 x Gigabit Ethernet ports enable real-time data transmission between the charging pile and the cloud platform (such as charging status monitoring and remote operation and maintenance). 8 x ADC channels achieve accurate acquisition of voltage, current, and temperature, and cooperate with the dynamic PWM adjustment algorithm to prevent the device from overheating. 4 x CAN-FD interfaces meet the high-speed communication requirements with BMS, charging controllers, etc., ensuring the accurate matching of charging parameters.
3. Security & Reliability
Hardware-level security: It integrates Nuvoton's TSI (Trusted Security Island), TrustZone, secure boot, AES/SHA/ECC/RSA encryption accelerators, and a True Random Number Generator (TRNG) to ensure the security of key storage and communication data.
Industrial-grade reliability: It supports operation in a wide temperature range from -40°C to 85°C and has passed the EMC anti-interference test, making it adaptable to the harsh environments of outdoor charging piles.
4. Function Expansion
Multimedia interaction: It supports RGB display interfaces (with a maximum resolution of 1080P) and I2S audio interfaces, and can drive touch screens to implement user interface (UI) interaction and voice prompt functions.
Remote management: It supports OTA (Over-the-Air) upgrades and AI predictive maintenance through a 4G module or Ethernet.
In summary, the FET-MA35-S2 CPU module features a trinity design of performance, interfaces, and security. It has passed the strict industrial environment testsForlinx Embeddedin the laboratory to ensure product stability. The full-pin-out design reduces the complexity of hardware development and shortens the product's time-to-market. It has become a key driving force for the intelligent upgrade of the TCU in charging piles, contributing to the efficient construction of new-energy vehicle charging infrastructure.
