Firmware Update module

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) RL78 only
  • Dual-Bank Method (Only for products with dual bank function)
• Tools for generating initial/update images for firmware updates are provided. (Renesas Image Generator)

• Partial Update Method

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• Full Update Method (without buffer)

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• Full Update Method (buffer is external flash) RL78 only

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• Dual-Bank Method (Only for products with dual bank function)

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• 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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