概览
描述
By using the FIT module, users can easily incorporate firmware update functionality and secure boot functionality into their applications.
Product Composition
- Firmware Update Module
- Demonstration project (Sample applications: Bootloader, Update application)
- Renesas Image Generator (Initial and update image generation tool)
特性
- Firmware update functionality can be easily integrated using the RX/RL78 family.
- The product is equipped with a secure boot function to verify the legitimacy of the firmware.
- The product offers a variety of update methods, such as Partial update method/Full update method/Dual-Bank method.
- Demonstration projects are available for boards with compatible devices.
- The acquisition of update data is implemented in the user application.
Therefore, various update environments can be constructed. - Tools for generating initial/update images for firmware updates are provided. (Renesas Image Generator)
- About the Firmware Updating Communications Module
We provide a module that controls communication between the primary MCU and the secondary MCU during firmware updates for the secondary MCU.
Learn More
发布信息
| Target Device | Product Name | Version/Release | Providing Method |
|---|---|---|---|
| RL78/G22 RL78/G23 RL78/G24 RL78/L23 | RL78/G22, RL78/G23, RL78/G24, RL78/L23 Firmware Update Module | Latest Ver.: V.2.04 Release 00 Released: Aug. 27, 2025 | Download: RL78/G22, RL78/G23, RL78/G24, RL78/L23 Firmware Update Module Rev.2.04 - Sample Code (ZIP | English, 日本語) |
| RX Family | RX Family Firmware Update Module Using Firmware Integration Technology | Latest Ver.: V.2.06 Release 00 Released: Jan. 23, 2026 | Download: RX Family Firmware Update module Using Firmware Integration Technology Application Notes Rev.2.06 - Sample Code (ZIP) |
目标设备
设计和开发
Additional Details
Function
By using the FIT module, users can easily incorporate firmware update functionality and secure boot functionality into their applications. (A firmware update is a process in which a device overwrites its own firmware with a new version of the firmware. Firmware updates may be applied to fix bugs, add new functions, or improve performance.)
This module has the following functions.
- Function for importing the update image acquired via the communication interface, etc. into the MCU.
- Function to write the update image to the built-in flash. (self-programming function)
- Function to activate the update image.
- Function to verify the validity of the image and boot. (secure boot function)
- The following update methods are provided.
- Partial Update Method
- Full Update Method (without buffer)
- Full Update Method (buffer is external flash)
- Dual-Bank Method (Only for products with dual bank function)
- Tools for generating initial/update images for firmware updates are provided. (Renesas Image Generator)
Update Method
Partial Update Method
图像
Full Update Method (without buffer)
图像
Full Update Method (buffer is external flash)
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Dual-Bank Method (Only for products with dual bank function)
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Renesas Image Generator
- Renesas Image Generator is a utility tool that generates firmware images for use with firmware update modules. The Renesas Image Generator can generate the following images used by the firmware update module.
- Initial image:An image file containing the bootloader and application program that is programmed using Flash Writer at the time of initial system configuration (extension: mot).
- Update image: An image file containing the firmware update (extension: rsu).
Generate initial image (Linear mode)
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Generate initial image (Dual-bank mode)
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Generate update image
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Firmware Updating Communications module
The firmware updating communications module is middleware which controls communications between MCUs in which the secondary MCU receives firmware for use in updating from the primary MCU and applies the firmware to updating in a system of the kind shown below, consisting of the primary MCU and the secondary MCU.
Users can easily update the firmware of the secondary MCU by embedding this module into the primary and secondary MCUs.
Software configuration of primary MCU-secondary MCU system (RX MCU) using this module
Related Documents
| Title | Issue date |
|---|---|
| Firmware Updates for Renesas MCU (PDF | English, 日本語) | Mar. 2026 |
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