2.2.2
Renesas RA Series MCU Naming Method and Selection
2.2.2.1 Renesas MCU Naming Method
Overall Naming:
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For beginners, understanding the different numbers and letters in the model numbers of the RA product family can be challenging. We will first take one model from the RA series MCU, R7FA6M5BH2CBG, as an example to explain the meanings of the different fields in the model naming.
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Model R7FA6M5BH2CBG
The meanings of the naming are as follows:
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①R: Represents Renesas.
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②③7F: Indicates MCU, which includes Flash memory.
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④⑤A6: Represents the RA6 product series.
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⑥⑦M5: “M” indicates mainstream products, “5” indicates the product group number.
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⑧B: Indicates the functional feature set, where “B” means it includes CAN-FD, while “A” means it does not.
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⑨H: Indicates internal FLASH capacity, “H” is 2MB.
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⑩2: Indicates the operating temperature range:
“2” is -40°C~85°C;
“3” is -40°C~105°C.
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The 11th, 12th, and 13th positions indicate the factory programming number. These three are optional, and this model does not have these three.
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C: The 14th position indicates the quality grade is industrial grade.
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BG: The 15th and 16th positions, “BG” indicates the package is FBGA176 pins, while “FC” indicates the package is LQFP176 pins.
The MCU model used in this tutorial development board is R7FA6M5BH3CFC, which differs from R7FA6M5BH2CBG only in the last four characters, mainly in the operating temperature range and packaging. In fact, the complete model is too long to be easily understood and remembered. Therefore, we generally abbreviate R7FA6M5BH3CFC to RA6M5.
In RA6M5, “RA6” indicates the Renesas RA6 series MCU, “M” indicates mainstream products, and “5” indicates the product group number. For example, in RA6T2, “T” indicates motor control products, and “2” indicates the product group number. The RA6M5 chip (LQFP176 pin package) looks as follows:
• The top surface of the chip is silk-screened
• The surrounding area consists of pins
The pin assignment diagram of the RA6M5 chip (LQFP176 pin package) is shown below:
2.2.2.2 Renesas RA Series MCU Selection Method
As shown in the figure below, when selecting, it is generally advisable to first understand the characteristics of different series MCU models such as RA0/RA2/RA4/RA6/RA8, and then select based on your specific needs.
2.3
Overview of TrustZone and Renesas DLM
Security is crucial! It must be considered from the very beginning of the project, as it cannot be added in later stages. At the very least, it cannot avoid the costly redesign work, and it may even face the need to rebuild the entire application. You can think of security as the foundation of a building: it does not have a glamorous appearance, and the design and construction time it requires may exceed the total time needed to build other functions. Even when completed, it may not be felt to exist. However, security is essential for all applications in an interconnected environment.
When is it necessary to ensure security? When the product communicates through wired or wireless interfaces (such as WiFi, Bluetooth, USB, or Ethernet); when storing critical information (such as keys, certificates, passwords, personal data, measurement data, or algorithms); when upgrading the product (for example, performing firmware updates, feature upgrades, or purchasing paid services).
Renesas Embedded Encyclopedia
Microcontrollers of Renesas RA Product Family
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Support
Creating secure applications in various ways
By equipping devices with security encryption engines based on Arm®Cortex®-M4, -M23, or -M33 cores, and with security memory protection units on devices with Cortex-M4 or -M23 cores, as well as through Renesas’ proprietary implementation of Arm’s TrustZone® on MCUs with Cortex-M33 cores.
This section will discuss the last method.
Note:
It is worth mentioning that most RA product family MCUs have been certified by PSA Certified™ Level 1, and the RA6M4 MCU series has been certified by PSA Certified™ Level 2. This includes PSA functional API certification for the RA product family flexible configuration software package that uses Trusted Firmware M (TF-M). Several RA product family MCU series have been certified by SESIP Level 1, ensuring basic security functions regardless of the software platform chosen.
In addition, the security encryption engine has received multiple NIST CAVP certifications, ensuring that various encryption functions operate correctly. This enhances user confidence when developing secure products for interconnected environments.
Need Technical Support?
If you have any questions while using Renesas MCU/MPU products, you can scan the QR code below or copy the URL into your browser to access the Renesas Technical Forum for answers or online technical support.
https://community-ja.renesas.com/zh/forums-groups/mcu-mpu/
To be continued
Recommended Reading
Introduction to e²studio and Keil and how to install the e²studio development environment – Renesas RA Series FSP Library Development Practical Guide Series (01)
How to install the Keil development environment and how to update the FSP library version of the development environment – Renesas RA Series FSP Library Development Practical Guide Series (02)
Introduction to ARM Microcontrollers and Overview of Renesas RA Series MCUs – Renesas RA Series FSP Library Development Practical Guide Series (03)
