78K0R/Hx3 is a 16-bit microcontroller that is ideal for CAN communication with built-in flash memory, CAN controller and other variable serial interfaces.


Main Solutions

Key Features:

  • Operating voltage: VDD = 2.7 to 5.5 V
  • Max. frequency: 24 MHz
  • ROM capacities: 64 to 256 KB
  • RAM capacities: 4 to 16 KB
  • 16 KB data flash memory
  • Package: 48-pin, 64-pin, 80-pin, 100-pin plastic LQFP(fine pitch)
  • Minimum instruction execution time can be changed from high speed (42 ns: @ 24 MHz operation with highspeedsystem clock) to ultra low-speed (33 ?s: @ 30 kHz operation with internal low-speed oscillator)
  • General-purpose register: 8 bits x 32 registers (8 bits x 8 registers x 4 banks)
  • On-chip single-power-supply flash memory (with prohibition of chip erase/block erase/writing function)
  • Self-programming (with boot swap function/flash shield window function)
  • Data protection (with illegal-memory access detection function)
  • Safety (with specific-register protection/prevent unintended occurrences of overflows of the watchdog timer function)
  • On-chip debug function
  • On-chip power-on-clear (POC) circuit and low-voltage detector (LVI)
  • On-chip watchdog timer (operable with the on-chip internal low-speed oscillation clock)
  • On-chip multiplier (16 bits x 16 bits, 32 bits / 32 bits)
  • Key interrupt function
  • Clock output controller
  • On-chip BCD adjustment
  • On-chip timer array unit
  • On-chip serial array unit
  • On-chip LIN-UART
  • On-chip CAN controller
  • I/O ports: 41/55/71/89 (N ch open drain (6 V tolerance): 4)
  • Timers:
    • 16-bit timer: 16/20/24 channels
    • Watchdog timer: 1 channel
    • 16-bit wakeup timer: 1 channel


  • Serial interface:
    • CSI: 2/3 channels
    • CSI: 0/1 channel/Simplified I2C: 1 channel
    • UART: 0/1 channel/Simplified I2C: 0/1 channel
    • UART (LIN-bus supported): 1 channel
    • CAN controller: 1 channel


  • 10-bit resolution A/D converter (AVREF = 2.7 to 5.5 V): 24 channels
  • Operating ambient temperature: TA = -40 to +85°C


Pin Count / Memory Size Lineup:

78K0R/Hx3-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.
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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.)


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