RA Flexible Software Package (FSP)

For additional information and links, go to GitHub.

v6.4.0

Release Notes

Flexible Software Package (FSP) for Renesas RA MCU Family, version 6.4.0

Minimum e² studio version for FSP 6.4.0 is e² studio 2025-12

• Download the FSP with e² studio Windows installer for this release: FSP Windows Platform Installer
• Download the FSP with e² studio Linux installer for this release: FSP Linux Platform Installer
  • Refer to Installing e² studio in a Linux PC | Renesas Customer Hub for information on installing e² studio and related software components on a Linux PC.
• Download the FSP with e² studio MacOS (Apple Silicon) installer for this release: FSP MacOS Platform Installer
  • Refer to the Quick Start Guide for the e² studio for macOS for information on installing e² studio and related software components on a macOS PC.

If using IAR or Keil MDK, download the Renesas Advanced Smart Configurator (RASC) for this release.

• For Windows download: FSP RASC Windows Installer
• For Linux download: FSP RASC Linux Installer
• For macOS (Apple Silicon) download: FSP RASC macOS Installer

All installers are available in the Assets section of this release.

Refer to the README.md in the FSP root folder for setup instructions, hardware details, and related links.

New Features

• Added support for RA0E3 devices – Includes FPB-RA0E3 board support
• Added HMAC-SHA 512/224, 512/256 support for RSIP-E51A and RSIP-E50D PM drivers
• Added support for VSC8541 PHY on the EK-RA8T2 board
• Added support for the EK-RA8T2 board
• Added support for lwIP SNTP application
• Added support for gPTP middleware
• Added Motor Control Middleware support
• Added Trajectory module support in Motor Control Middleware
• Added Motor HAL driver support in Motor Control Middleware
• Added support for Hall sensor and BEMF sensor modules in Motor Control Middleware
• Added xDLMS InitiateRequest message decryption feature on RSIP-E31A PM driver
• Added KDF-SHA 512 support for RSIP-E51A and RSIP-E50D PM drivers
• Added features to verify public key certificate and key import using RSA algorithm on RSIP-E51A and RSIP-E50D PM drivers
• Released a new CAVP-certified module for RSIP-E31A Protected Mode driver
• Added support for 24-pin packages R7FA2T1073CNK and R7FA2T1074CNK
• Arm^® Compiler for Embedded (Arm Compiler 6) updated to version 6.24

Fixes and Improvements

• Added SPI support to r_ble_gtl
• r_pdm: Fixed sample rate calculation in the configurator. The calculation was off by a factor of 2 due to decimation performed by the low-pass filter in hardware
• Simplified OSPI_B MDF configuration and constraints related to DOTF support
• Resolved an IAR compiler build failure that occurred when using the PQC crypto module with RA8 devices
• Enabled PLL startup when HOCO is selected as the clock source and MOSC is not populated
• Fixed edge case in PQC where a NULL check prevents a valid 0x00000000 address from being used as a pointer
• Fixed MCUBoot build failure when the Flash LP Bank Swap setting is configured to Instant
• Corrected the configuration for L3 forwarding feature in r_layer3_switch
• Updated module version information of the RSIP Protected Mode driver
• Added list of HAL drivers and supported RA MCUs to the FSP User's Manual
• Added support for 8-byte transfer size option in DTC
• Added support for 8-byte transfer size option in DMAC
• Added TFLM support on RA MCUs without NPU
  • Please refer to https://renesas.github.io/fsp/group___r_m___e_t_h_o_s_u.html for configuring C/C++ build settings.
• Added ML-DSA support for MCUboot signing
• r_sci_b_uart: Added new configuration parameter 'Extra > TXI/TEI Synchronization Delay Cycles' to address the issue where the last transmit data was not always output when SCICLK was much slower than PCLK
• Removed AES-XTS key injection feature for RSIP-E31A according to the support policy.
• Added PM FOC motor algorithm support in Motor Control Middleware
• Added Motor Tuning module for permanent magnet (PM) motors in Motor Control Middleware
• Moved GTETRGx pins from GPT to GPT_POEG in RA6T2 Pin page
• Added support of UART_EVENT_TX_DATA_EMPTY event for SAU UART
• Updated r_rmac diver to support L2 over L3 fabric
• Secure and privilege attributes for NPU to access memories shall be configured via properties
• Updated control procedures for the RSIP-E31A PM driver to code size reduction version
• Fixed GCC C++ build warning in ThreadX port
• Updated Segger JLink version to 9.14
• Added constraint to check etherc buffer to netxduo
• Fixed error on EtherCAT SSC Port when adding one more timer instance 

Known Issues

• Solution Projects (TrustZone, Multicore):
  • There are issues related to pin configuration synchronization between projects in e² studio 2025-12. Refer to this document for workarounds.
• RA0E1:
  • e² studio projects automatically reset compiler optimization to a Size setting on every generate or build operation
  • Add optimization flags (e.g. -O0) manually to 'Other optimization flags' to override the -Oz setting
  • HS400x and ZMOD4xxx sensors cannot be used on RA0E1
  • FS3000 sensor does not support the SAU-I2C driver
• Selecting 'Safely Remove Hardware and Eject Media' on Windows and ejecting the mass storage (PMSC), when using the USBX composite device (PCDC+PMSC), the Windows Explorer for PMSC does not disappear.
• PMSC may not work properly when the USBX Composite Device (PCDC+PMSC) is connected to a specific Linux OS (USB Host).
• EWARM version 9.70.2 does not contain support for RA0E3. To develop with IAR for these devices, it is necessary to install a support patch file that can be downloaded by EWARM v9.70.2 users from the IAR MyPages system
  • RA0E3 (arm_Renesas_RA0E3_20260106_1.zip)
• When importing projects in e² studio that were created using a previous toolchain version, be sure that the version specified in the project is integrated (Window->Preferences->Renesas->Renesas Toolchain Integration) or select the appropriate toolchain version if upgrading the project to a later FSP version.
• When upgrading RA6T2 projects to FSP 6.4.0, the GTETRGx pin assignments might be lost. Please re-assign the pins manually.
• When upgrading RA0E1/E2/L1 projects to FSP 6.4.0, the SAU_SPI00 pin group might be changed; please restore the pin group manually.
• For known issues in the tools, please refer to the respective tool's release notes, e² studio RN

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