MYC-YF13X SDK Update：Triple Upgrade in System, Security & Functionality

Shenzhen, China - April 27, 2026 - MYIR introduces the STM32MP135F to the MYC-YF13X System-On-Module, which comes with security features compliant with the EU's Cyber Resilience Act (CRA). Additionally, the U-boot, Linux The kernel and Yocto build systems have been upgraded and optimized, providing developers with a safer, more stable, and more comprehensive software platform. 

1. Update Overview

2. U-Boot Update

This upgrade primarily adds the Secure Boot feature:

Utilizing a secure boot mechanism, this feature verifies the boot image during system startup to ensure the integrity and legitimacy of system software

1) preventing unauthorized firmware activation 

2) preventing tampering with the system image

3) enhancing the device's overall security level

This functionality is implemented through the security chip STM32MP135F on MYC-YF13X.

3. Kernel Update

This version primarily introduces the following functional enhancements and bug fixes:

1) Automatic switching of RS485 flow control pins

The RS485 transmit/receive direction control pins are automatically managed by the driver, simplifying the user application layer control logic.

2) Fix for probabilistic write failure in EEPROM

Fixes the issue of EEPROM write failures It enhances data storage reliability under specific conditions.

3) Automatic USB Type-C master-slave switching

Enables automatic switching between Host and Device for the Type-C interface, enhancing interface compatibility.

4) Camera DCMI interface support

New support for the DCMI camera interface facilitates the development of image acquisition applications.

4. Yocto Update

Regarding the Yocto build system, this upgrade introduces several new features to enhance system security, including automatically generating SPDX SBOM (Software Bill of Materials) files during image compilation to record software components used in the system, meet compliance requirements in overseas markets, and facilitate security audits and software traceability; supporting automatic generation of RAUC upgrade packages to provide a reliable system upgrade mechanism suitable for OTA remote upgrade scenarios and offer upgrade package signature verification capabilities; and adding secure storage support to save sensitive information such as keys and certificates with security isolation and protection mechanisms based on the hardware isolation capability It supports the secure chip STM32MP135F and features reliable upgrade capabilities.

1) SPDX SBOM creation

Automatically generate the SPDX SBOM (Software Bill of Materials) file during image compilation: - This document records all software components used in the system 

- Complies with relevant compliance requirements

- Facilitates security audits and software traceability.

2) RAUC Upgrade Package

- The build system supports automatic generation of RAUC upgrade packages

- It features a reliable system upgrade mechanism 

- and is compatible with mainstream device platforms suitable for OTA remote upgrade scenarios 

- package signature verification capability.

3) New Secure Storage Feature: 

- Secure Storage supports the storage of sensitive information such as keys and certificates, and provides a secure isolation and protection mechanism. 

This feature leverages the hardware isolation capabilities of the STM32MP135F security chip.

4) A/B Dual-Partition File System: 

The newly introduced A/B dual-partition file system mechanism 

- supports lossless system upgrades. 

- In case of upgrade failure, it automatically rolls back, 

- enhancing device upgrade reliability. 

This mechanism can be used in conjunction with the RAUC OTA upgrade solution and integrated with the Secure Update provided by the security chip.

5) One-Click Compilation of the Yocto Security System: 

The new system now supports one-click compilation of the security framework. By integrating security chip drivers, signature toolchains, and security configurations, developers can generate a complete system image with features like Secure Boot, Secure storage, plus RAUC-based security updates executable with a single command, significantly streamlines the deployment process for security functionalities.

5. Supported new security chips: STM32MP135F and product MYC-YF135F

This version introduces the STM32MP135F security chip and launches the MYC-YF13X System-On-Module and MYD-YF13X Development Board based on this chip. The combination offers the following hardware-level security capabilities:

This integrated design significantly enhances the device's security performance and compliance capabilities for industrial, IoT, and other scenarios. The security chip STM32MP135F, whose security has been certified, integrates a hardware cryptography accelerator that supports advanced cryptographic algorithm acceleration and a Trusted Execution Environment built on hardware-level security isolation mechanisms. The hardware cryptography accelerator boasts higher security and performance compared to software encryption, as the key is stored in tamper-proof hardware and encryption operations are executed by dedicated hardware. Meanwhile, the MYD-YF13X product provides comprehensive software support for these security features—developers can enable all functionalities through Yocto's one-click compilation of the security system.

6. Summary 

The MYD-YF13X V2.0.0 version features comprehensive upgrades in system version, security capabilities, and functional support. 

1) The system version upgrade (U-Boot/Kernel/Yocto) 

2) Incorporates the STM32MP135F security chip which has passed security certification for MYD-YF13X. 

3) Supports Secure Boot, Secure Storage, Secure Update, and Secure Isolation. 

4) Supports RAUC OTA upgrades and an A/B dual-system upgrade mechanism. 

5) Yocto provides one-click compilation of the security system, simplifying the integration of security features

6) Includes an SPDX SBOM software list to meet compliance requirements.