The UPD78984x Group is supported only for the customers who have already adopted any of the products. For new adoption, please consider other products such as RL78/G1G Group.

Main Solutions

Key Features:

  • Operating voltage: VDD = 4.0 to 5.5 V
  • Max. frequency: 8.38 MHz
  • ROM capacities: 8 - 16 KB mask ROM, 16 KB flash memory
  • RAM capacities: 256 bytes
  • Package: 44-pin plastic QFP, LQFP (10 x 10)
  • Minimum instruction execution time changeable from high-speed (0.24 µs) to low-speed (0.96 µs) (System clock8.38 MHz operation)
  • I/O port: 30
  • Serial interface (UART00): 1 channel
  • Timer: 6 channels
    • 10-bit inverter control timer: 1 channel
    • 8-bit timer/event counter: 2 channels
    • 8-bit timer counter: 1 channel
    • Watch timer: 1 channel
    • Watchdog timer: 1 channel


  • 8-bit resolution A/D converter: 8 channels
  • Multiplier: 10 bits x 10 bits = 20 bits
  • SWAP: The contents of the higher four bits of an 8-bit register can be exchanged with the lower four bits
  • Vectored interrupt sources: 15


Pin Count / Memory Size Lineup:

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.


The information contained herein has been provided by a member of Renesas Partners. This information is provided on the Renesas website provided for convenience and informational purposes only. Renesas is not responsible for the contents of this page or any changes or updates to the information posted on this page. Certain links provided herein permit you to leave this site and enter non-Renesas sites. These linked sites are not under control of Renesas. Renesas is not responsible for the contents of any linked site or any changes or updates to such sites. These links are provided for convenience and informational purposes only. The inclusion of any link does not imply endorsement by Renesas of any linked site.

Renesas's Publication of information regarding third-party products or services does not constitute an endorsement regarding the suitability of such products or services or a warranty, representation or endorsement of such products or services either alone or in combination with any of Renesas's product or service.