Microcontroller incorporating a floating point unit (FPU), best suited for controlling a single inverter


The RX23T Group is 32-bit microcontroller and suited for single inverter control and has a built-in FPU (floating-point processing unit) that enables it to easily program complex inverter control algorithms. This helps to greatly reduce the man-hours required for software development and maintenance. Furthermore, thanks to the RX200 core the current consumed in software standby mode (with RAM retention) is a mere 0.45 μA. RX23T microcontrollers operate in a broad voltage range from 2.7 V to 5.5 V, which is useful for inverter control, and are highly compatible with the RX62T Group at the pin arrangement and software level.


Key Features:

CPU core RX CPU v2 core
  • General registers: 32-bit x 16
  • Multiplier: 32-bit multiplier
  • Divider: Yes
  • Multiply-accumulator: Yes (two types: memory-to-memory operations and register-to-register operations)
Maximum operating frequency 40MHz
Power supply voltage 2.7 to 5.5V
Floating-point operation unit Single-precision floating-point operation unit
(supports addition/subtraction/comparison/multiplication/division/other instructions)
Proguram Flash Max.128 KB
On-chip peripheral functions Transfer
  • Data transfer controller (DTCa)
  • Multi-function timer pulse unit 3: 16-bit x 6 channels (MTU3c)
  • Port output enable 3 (POE3b)
  • 8-bit timer (TMR): 8-bit x 2 channels x 2 units
  • Compare match timer (CMT): 16-bit x 2 channels x 2 units
  • Serial communications interface (SCIg): 2 channels
  • I2C bus interface (RIICa): 1 channel
  • Serial peripheral interface (RSPIa): 1 channel
  • 12-bit A/D converter (S12ADE): 10 channels
  • Comparator C (CMPC): 3 channels
  • D/A converter for generating reference voltage for comparator C (DA)
  • Clock frequency accuracy measurement circuit (CAC)
  • Data operation circuit (DOC)
  • 14-bit independent watchdog timer (IWDTa)
  • A/D converter self-diagnostic function / open-circuit detection function
  • CRC calculator (CRC)
  • Register write protection
Clock generation circuit
  • Main clock oscillator
  • High-speed on-chip oscillator
  • Low-speed on-chip oscillator (LOCO)
  • PLL frequency synthesizer
  • Dedicated on-chip oscillator for the IWDT
  • Multi-function pin controller (MPC)
  • Power-on reset circuit (POR)
  • Voltage detection circuit (LVDAb)
On-chip debugger interface Yes
Low power consumption modes 3 modes
  • Sleep mode
  • Deep sleep mode
  • Software standby mode
Packages PLQP0048KB-B(48-pin,LFQFP,7x7mm,0.5mm pitch)
PLQP0052JA-B(52-pin,LQFP,10x10mm,0.65mm pitch)
PLQP0064KB-C(64-pin,LFQFP,10x10mm,0.5mm pitch)

Pin Count / Memory Size Lineup:

Program Flash



Block Diagram:

RX23T Block Diagram

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 RX23T oscillation evaluation result.
Murata Manufacturing: For IC Manufacturer, select Renesas Electronics, and enter R5F523T 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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