Best combination of low-power consumption and high-performance 32-bit RXv2 CPU core with enhanced DSP and FPU

Recommended Product
Production Status
Mass Production


The RX231 Group of devices leverages an optimal combination of a 32-bit RXv2 CPU core with improved DSP/FPU and low-power consumption technology to realize extreme power efficiency. High-performance digital filtering, floating-point operations, and other processing can be performed even in environments with low current supply capacity. The RX231 Group implements the industry's top level communication security and encryption functions. It is equipped with as  capacitive touch sensor capabilities that combine high sensitivity with a high level of noise tolerance, as well as SD host interface, USB, and CAN communication functionality. These products are suitable for applications in industrial, home appliance, healthcare, smart meter, IoT, and other fields.


The RX230 Group has more simplified configuration of RX231 by removing SD host interface, USB, and CAN,  which is optimized for general purpose market equipment requiring 5v power supply support, external bus, or  high DSP/EPU operational performance at low power consumption.


Renesas offers comfortable Reference solution which enables to immediately incorporate RX231's features such as security function, encryption function, HMI (Human Machine Interface), and touch key into users applications.


Product Status: Mass Production
PLP (Refer to Orderable Parts)
Family: RX
Series: RX200
Group: RX231


RX231 Block Diagram


Pin Count
Package Type
Program memory
384 KB Flash memory
64 KB
Data Flash
8 KB
CPU (Bit, Clock, DMA, External Bus etc)
RXv2 (32-bit)
Max. Frequency
54 MHz
Sub-Clock (32.768 kHz)
On-chip Oscillator Freq.
Real-Time Clock (RTC)
Power-On Reset
Low Voltage Detection
Floating Point Unit
DMA Remarks
DMAC x 4ch, DTC
External Interrupt Pins
I/O Ports
8-bit Timers
4 ch
16-bit Timers
17 ch
Watchdog Timers
2 ch
PWM Output
3-Phase PWM Output Function
A/D Converters
12-bit x 12 ch
D/A Converters
12-bit x 2 ch
1 ch
USB Ports
USB Host
USB Peripheral
USB Remarks
USB Battery Charging Specification Rev 1.2 support
6 ch
7 ch
6 ch
7 ch
Operating Conditions
Operating Voltage
1.8 to 5.5 V
Operating Temperature
-40 to 85 ℃ (Ambient Temperature)
Touch key x10ch

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.


Software Design Support

Title Description
e² studio This integrated development environment (IDE) is based on the popular combination of the open-source Eclipse IDE and its CDT plug-in that enables C/C++ language development.
CS+ This integrated development environment (IDE) can be used for coding, assembly, compiling, and simulation. CS+ is also included with starter kits.
E2 emulator Lite This entry-level on-chip debugging emulator provides functionality equivalent to that of the E1 emulator at a low price.
E2 emulator This on-chip debugging emulator has advanced features that improve the efficiency of development. In addition to the basic functions from debugging to flash programming, this emulator supports hot plug-in and external triggers as standard items. This emulator also helps to reduce development time by downloading at high speeds (compared to the E1 emulator) and the ability to work in combination with various solutions such as the tuning of current drawn by systems under development.
E20 emulator This on-chip debugging emulator has enhanced debugging facilities such as large-capacity tracing and real-time RAM monitoring when used in combination with RX600 and RX700 MCUs (this emulator provides debugging functionality equivalent to that of the E1 emulator for other MCUs).
E1 emulator This on-chip debugging emulator is a standard model which provides basic debugging functions (production is to be discontinued at the end of December 2019).


Hardware Design Support

Title Description
IBIS/BSDL 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 resonator :
KYOCERA: Click here for RX231 oscillation evaluation result. Click here for RX230 oscillation evaluation result.
Murata Manufacturing: For IC Manufacturer, select Renesas Electronics, and enter R5F5231 or R5F5230 into the IC Part Number search box.

For Sub clock resonator :
KYOCERA: Click here for RX231 oscillation evaluation result. Click here for RX230 oscillation evaluation result.

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

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