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RX65N, RX651

RX65N and RX651 Groups are new mainstream RX microcontrollers with RXv2 core, large-capacity RAM, and enhanced security, connectivity, and HMI


High Power Efficiency

RXv2 core with maximum operating frequency of 120 MHz realizes high power efficiency of 34 CoreMark/mA, which enables battery life of endpoint devices, etc. to be maximized, as well as high performance.


Extensive communication functions and encryption functions realize secure updating of device control

The RX65N Group and the RX651 Group can be divided into products having a code flash memory capacity of 1 MB or less, and or 1.5 MB or more. The products with 1 MB or less code flash memory is equipped with a large-capacity RAM of 256 KB for carrying out high-speed communication processing that is required for various communication interfaces such as Ethernet, USB, CAN, SD host/slave interface, and quad SPI. The products with 1.5 MB or more code flash memory have even more enhanced encryption functionality. Trusted secure IP protects encryption keys by controlling access. By combining this with a rich variety of communication functions high root-of-trust levels are achieved. Furthermore, protect and dual-bank functions that prevent erroneous writing of on-chip flash memory enable secure and easy program updating via a network. In addition, the large on-chip RAM of 640 KB allows high-speed processing of heavy loads, enabling rich user interfaces using the LCDC and 2D graphics engine.


Reduce development time

The RX65N and RX651 Groups are highly compatible among the same series both in functional scalability and pin assignments. In addition, driver/middleware (FIT support), sample code-generation tools (code generators), and evaluation boards (starter kit and Envision Kit) are available, to allow reuse of most developed hardware/software resources. Partner tools that make it easy to build the kind of user interfaces (UI) that are essential for HMI are also available. All these enable seamless and scalable product development from small to large-scale applications easily and in a short time.


We offer the following solutions for reference for the RX651 Group and the RX65N Group to help you embed encryption technologies and HMI (human-machine interface) essential for IoT into your system immediately.


Microcontroller (MCU) evaluation boards


For evaluation of encryption functions, please use the following board and software.


HMI solution kit

HMI demonstration video using Envision-kit >>




GUI development

Free tool

  • emWin by Segger     Learn more >>
  • RX Display adjustment tool      QE for Display

Started to supply a demonstration version of a tool for LCD control by RX MCUs. Learn more>>



Product Brochures

RX600/RX700 Brochure

Key Features:


Code Flash

1.0MB or less

Code Flash

1.5MB or more

ITEM RX65N RX651 RX65N RX651
Frequency 120 MHz
Vcc 2.7 - 3.6V
Memory Code Flash 512KB, 768KB, 1MB 1.5MB,2.0MB
Dual bank function - Yes
BGO function - Yes
Data Flash - 32KB
SRAM 256 KB 640KB(256KB+384KB)
DMA DMAC x 8 channels, Data Transfer Controller (DTC), EXDMAC x 2 channels
External Bus 8/16-bit separate/multiplex, SDRAM 8/16/32-bit separate/multiplex, SDRAM
Timer   General Purpose Timer

Multi-Function Timer Unit (MTU3):

16-bit x 8 channels +3 2-bit x 1 channel
Timer Pulse Unit (TPU):

16-bit x 6 channels
Timer (TMR):

8-bit x 4 channels
Compare Match Timer:

16-bit(CMT) x 4 channels + 32-bit(CMTW) x 2 channels

RTC with Battery Backup Function 1 channel
Independent Watchdog Timer /Watchdog Timer 1 channel / 1 channel
Communication Interface

Serial Communications Interface/

Serial Communications Interface with FIFO

11 channels / 2 channels
I²C Bus Interface 2 channels 3 channels
Serial Peripheral Interface 3 channels
Quad Serial Peripheral Interface 1 channel
Ethernet, EDMAC 1 channel - 1 channel -
USB2.0 Full speed 1 channel (host/function/OTG)
CAN 2 channels

SD Host Interface/

SD Slave Interface

1 channel / 1 channel
MMC Host Interface 1 channel
Analog A/D Converters 12-bit x 8 channels (with 3ch S&H) + 12-bit x 21 channels
D/A Converters 2-bit x 2 channels
Security AES Yes Yes (Built in Trusted secure IP)
True Random Number Generator (TRNG) Yes Yes (Built in Trusted secure IP)
Trusted Secure IP - Yes


(Human Machine Interface)

CMOS Camera Interface PDC
(Parallel Data Capture)
1 channel


(Graphic LCD controller)

- 1 channel


(2D drawing engine)

- Yes
Other CRC32, Data Operation Circuit, Port Output Enable 3, Event Link Controller, Temperature Sensor
Package 100 LFQFP (0.5mm pitch, 14x14mm)
144 LFQFP (0.5mm pitch, 20x20mm)
100 TFLGA (0.65mm pitch, 7x7mm)
145 TFLGA (0.5mm pitch, 7x7mm)


(0.5mm pitch, 24x24mm)

(0.8mm pitch, 13x13mm)

(0.5mm pitch, 8x8mm)


Pin Count / Memory Size Lineup:

Program Flash


Block Diagram:

Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.

Resources for Software and Hardware

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas products.
Video Watch videos related to this product.


Software Design Support

Title Description
CS+ An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)
e2 studio Renesas eclipse embedded studio, known as e² studio, is a complete development and debug environment based on the popular Eclipse CDT project.
E1 A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)
E2 Lite
The E2 emulator Lite is also available as a flash memory programmer with flash programming software (Renesas Flash Programmer).
Renesas Starter Kit+ for RX65N-1MB All the development tools you need for MCU evaluation and getting started. Also recommended for training.
Renesas Starter Kit+ for RX65N-2MB


Hardware Design Support

Title Description

IBIS standard simulation data is required for high-speed board design and can be used to run simulations to examine and troubleshoot issues such as waveform reflection, ringing, and so on, before producing the actual board.

BSDL is a data input format supported by most IEEE 1149.1 (JTAG)-compliant tools. The automatic test pattern generation (ATPG) and automatic test equipment functions of these tools facilitate testing.

Resonator Information

Please search for your resonator on its manufacturer's site linked below. If you require optimal oscillation circuit constants for your particular system, please ask the manufacturer of the oscillator.


For main clock resonators/For subclock resonators : 

KYOCERA: Click here for RX65N oscillation evaluation result. Click here for RX651 oscillation evaluation result.

Murata Manufacturing: For IC Manufacturer, select Renesas Electronics, and enter R5F565 into the IC Part Number search box.

You can filter the sample codes and application notes that are displayed using the below filters.

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