The 78K0/Kx2-C is an 8-bit microcontroller with hardware HDMI-CEC functionality that reduces standby power by 99.8% compared to previous models, and improves system operability and responsiveness.

Main Solutions

Key Features:

  • Operating voltage: VDD = 2.7 to 3.6 V
  • Max. frequency: 20 MHz
  • ROM capacities: 32 KB to 60 KB flash memory
  • RAM capacities: 1 KB to 3 KB
  • 48-pin/64-pin plastic LQFP package
  • 78K0 CPU core
  • On-chip internal high-speed oscillation clocks
    • 8 MHz Internal high-speed oscillation clock: 8 MHz±5 %


  • On-chip single-power-supply flash memory
  • Self-programming (with boot swap function)
  • On-chip debug function
  • On-chip power-on-clear (POC) circuit and low-voltage detector (LVI)
  • On-chip watchdog timer (operable with the dedicated internal low-speed oscillation clock)
  • On-chip multiplier/divider (16 bits x 16 bits, 32 bits/16 bits)
  • On-chip key interrupt function
  • On-chip clock output/buzzer output controller
  • I/O ports: 41 (N-ch open drain: 10) / 55 (N-ch open drain: 12)
  • Timer: 9 channels
    • 16-bit timer/event counter: 3 channels
    • 8-bit timer/event counter: 2 channels
    • 8-bit timer: 2 channels
    • Real-time counter: 1 channel
    • Watchdog timer: 1 channel


  • Serial interface
    • CSI: 1 channel/UART: 1 channel
    • CSI: 2 channels (CSI11:supporting SPI)
    • UART (supporting LIN (Local Interconnect Network) -bus): 1 channel
    • UART: 0/1 channel
    • I2C: 3 channels


  • 10-bit resolution A/D converter (AVREF = 2.7 to 3.6 V): 8 channels
  • CEC transmission/reception circuit
  • Remote controller receiver



Pin Count / Memory Size Lineup:

78K0/Kx2-C-Pin Count/Memory Size

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.


Software Design Support

Title Description
CS+ An integrated development environment that can be used for coding, assembling/compiling, and simulation. (Also included with Renesas Starter Kits.)
E1 A standard Renesas on-chip debugging emulator that enables users to carry out ample debugging for real development at low cost. (Also included with starter kits.)


Hardware Design Support

Title Description
Characteristics data Information on observed values. Please use this as reference data when developing your set.


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