Major Embedded News for Week 46 of 2025

The embedded news for week 46 of 2025 is as follows:1. Zephyr RTOS 4.3.0 ReleasedZephyr RTOS officially released version 4.3.0 on November 13, 2025. This update mainly brings improved support for multi-core and heterogeneous SoCs, stricter and unified device tree (DTS)/driver binding specifications, as well as numerous stability fixes for peripheral subsystems such as SPI, I²C, and Sensors. In terms of security, version 4.3 further strengthens the security partition (PSA/TF-M) and secure boot system. Additionally, it adds and expands support for ARM, RISC-V, and wireless SoCs from multiple vendors, while optimizing the build system and VS Code development experience.2. Open Source USB PD 3.2 Sink Protocol Stack Officially ReleasedIn November 2025, the open-source community launched pdsink, a USB Power Delivery 3.2 Sink (power-receiving end) protocol stack designed for embedded devices, supporting the latest fast charging standards including EPR (Extended Power Range), suitable for various power modules, embedded terminals, and mobile devices.pdsink provides a complete implementation of USB-C CC communication, PD3.2 protocol parsing, PDO/AVS negotiation, and power management state machine, with good portability, making it easy to integrate into lightweight microcontrollers such as Cortex-M and RISC-V. The project is licensed under the MIT open-source license, suitable for commercial products and research development.This release also includes a configurable power policy interface, optional FRS (Fast Role Swap) support, a debugging log module, and a HAL abstraction layer, enabling developers to implement power-receiving functionality without relying on dedicated PD chips, making it suitable for building PD power supply solutions for power modules, smart terminals, mobile accessories, robots, and industrial equipment. (For related materials, please contact me privately)3. Nuvoton NuMicro M55M1 Series + NuMaker-X-M55M1D Development BoardMajor Embedded News for Week 46 of 2025The Nuvoton NuMicro M55M1 series is its latest generation of AI microcontrollers (MCUs), aimed at edge AI, smart sensing, and embedded terminal scenarios.The corresponding development board, NuMaker-X-M55M1D, is an official evaluation platform for quickly validating the functions and ecosystem of the M55M1 series MCUs. (For details, please contact me privately)Major Embedded News for Week 46 of 2025

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