The UPD78983x 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/L13 Group.

Main Solutions

Key Features:

  • Operating voltage:
    • VDD = 1.8 to 3.6 V (mask ROM version)
    • VDD = 3.0 to 3.6 V (flash memory version)


  • Max. frequency: 5 MHz
  • ROM capacities: 24 KB to 60 KB mask ROM and 60 flash memory
  • RAM capacities: 2.2 KB to 3.2 KB
  • 144-pin plastic LQFP package
  • Ceramic/crystal oscillation (0.4 µs: 5 MHz) or RC oscillation (1.0 µs: 2 MHz) is selectable for the main system clock oscillator.
  • I/O ports: 37
  • Remote controller receive input pin: 1
  • Timer: 8 channels
    • 8-bit timer: 6 channels
    • Watch timer: 1 channel
    • Watchdog timer: 1 channel


  • Sound generator: 10-level volume, 3-octave scale
  • 8-bit resolution A/D converter: 3 channels (µPD78983xA, 78983xB, 78F9835 only)
  • Serial interface: 1 channel
  • LCD controller/driver (booster): Four display modes selectable (48 x 48, 64 x 32, 80 x 16, 80 x 8)
    1/5 bias
  • Multiplier: 8 bits x 8 bits = 16 bits


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.


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