The RL78/G14 Fast Prototyping Board comes equipped with a high-performance RL78/G14 microcontroller and is an evaluation board specialized for prototype development for a variety of applications. It has a built-in emulator circuit that is equivalent to an E2 emulator Lite so you can write/debug programs without additional tools. In addition, with Arduino Uno and Pmod™ interfaces included as standard and through-hole access to all pins of the microcontroller, and so on, it has high expandability.

Bluetooth ® Low Energy wireless communication functionality can be easily added by combining this board with the optional RL78/G1D BLE Module Expansion Board (RTKYRLG1D0B00000BJ), enabling early prototyping of IoT endpoint devices.

It is also possible to prototype IoT sensor devices using wireless communication based on LoRa® by combining with a Semtech SX1261/SX1262 LoRa® transceiver.

The user's manual, schematics, and other documents are available here.

(Note) Please use Bluetooth® and LoRa® according to the radio regulations of each country during use.


  • Equipped with an RL78/G14 16-bit microcontroller (80-pin, ROM: 512KB, RAM: 48KB)
  • No additional tools are required for program debugging/writing with the built-in emulator circuit equivalent to an E2 emulator Lite
  • Through-holes with access to all of the pins of the microcontroller
  • Arduino Uno and Pmod™ interfaces come standard
  • Support for various RL78 software and tools (see software and tools here)

RL78/G14 Fast Prototyping Board (with box)

RL78/G14 Fast Prototyping Board (with box)

RL78/G14 Fast Prototyping Board

RL78/G14 Fast Prototyping Board

RL78/G14 Fast Prototyping Board and RL78/G1D BLE Module Expansion Board

RL78/G14 Fast Prototyping Board and RL78/G1D BLE Module Expansion Board

Sample Software and Application Notes Are Available

Samples are available in combination with the RL78/G1D BLE Module Expansion Board or in combination with the Semtech SX1261/SX1262. There are plans to expand this lineup in the future.

Documentation and demo software Description Document number
RL78/G14 Fast Prototyping Board Host Sample Explains the method for sending sensor information via Bluetooth communication using the RL78/G14 Fast Prototyping Board and the RL78/G1D BLE Module Expansion Board. R01AN4834
LoRa®-based Wireless Software Package This is a wireless software package for LoRa that can be used in combination with the RL78/G14 Fast Prototyping Board and SEMTECH SX1261/SX1262. It includes the LoRaWAN® network communication software that is ideal for applications that require low power consumption and long-term battery life, along with evaluation tools to facilitate evaluation of wireless characteristics. R11AN0227

Ordering Information

Product Name Orderable Part Number Buy
RL78/G14 Fast Prototyping Board RTK5RLG140C00000BJ Buy

*Semtech, LoRa®, and LoRaWAN® are registered trademarks of Semtech Corporation.

RL78/G14 Fast Prototyping Board and Semtech SX1261

RL78/G14 Fast Prototyping Board and Semtech SX1261

Design Support Resources

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.
On-Demand Training Renesas Academy provides 24/7 on demand access to course modules on the latest product features and capabilities.
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 MCU's.
Tool News Tool release information and other important information.
Operating Environment Information on system requirements and operating environment for the latest version of tools.
Tool Environmental Information Information on RoHS compliance of tools.
Info on Discontinued Products A list of Renesas software and tools that have been discontinued and are no longer being offered for new projects.

Tool Information

Tools Orderable Part Number (s) Production Status Manufacturer Suggested Single Tool Price
Description Distributor Stock Distributors Distributor Purchase Buy Direct
RTK5RLG140C00000BJ Mass Production Renesas call 1 RL78/G14 Fast Prototyping Board 2 Mouser -

Note: Distributor Prices may vary from the stated budgetary price. The pricing and availability information on this site is based on information provided by Renesas’ authorized distributors and is subject to change without notice. By selecting a distributor from this page, you will be redirected from the Renesas site to the distributor’s website to complete a purchase. The distributors are independent from Renesas and maintain their own terms and conditions of sale. Renesas disclaims all representations and warranties, express and implied, with respect to transactions between distributors and their end customers.