64 microcontroller, 14 x 14 mm


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Overview of UPD78F0034BGC-8BS-A

The UPD78F0034BGC-8BS-A is a high-performance 8-bit microcontroller from Renesas Electronics featuring a powerful CPU, flash memory, and various peripherals. It is designed for embedded control applications requiring a compact and efficient microcontroller solution.


(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

  • VSS: Ground connection
  • VDD: Positive power supply
  • RXTX: UART communication pin
  • INT0: External interrupt 0
  • INT1: External interrupt 1
  • PWM: Pulse Width Modulation output
  • SCL: I2C clock pin
  • SDA: I2C data pin
  • AN0-AN7: Analog input pins
  • RESET: Reset pin

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the UPD78F0034BGC-8BS-A microcontroller for a visual representation.

Key Features

  • 8-Bit CPU: The UPD78F0034BGC-8BS-A features an 8-bit CPU core for efficient data processing.
  • Flash Memory: Integrated flash memory for program storage and data retention.
  • UART Communication: Support for UART communication for serial data exchange.
  • Peripheral Interfaces: Various peripheral interfaces such as I2C, PWM, and analog inputs for versatile applications.
  • Low Power Consumption: Designed for low power operation, suitable for battery-powered devices.

Note: For detailed technical specifications, please refer to the UPD78F0034BGC-8BS-A datasheet.


  • Embedded Control Systems: Ideal for use in embedded control systems for automation and monitoring.
  • Sensor Interfacing: Suitable for interfacing with sensors in IoT and industrial applications.
  • Motor Control: Can be used for motor control applications in robotics and automotive systems.


The UPD78F0034BGC-8BS-A microcontroller combines a powerful CPU, flash memory, and various peripherals to provide an all-in-one solution for embedded control applications. It offers reliable and efficient control capabilities for diverse applications.

Usage Guide

  • Power Supply: Connect VDD (Pin 2) to the positive power supply and VSS (Pin 1) to ground.
  • Peripheral Connections: Interface peripherals with the corresponding pins according to the datasheet specifications.
  • Programming: Use appropriate development tools and software for programming the flash memory.

Frequently Asked Questions

Q: Can the UPD78F0034BGC-8BS-A operate at higher clock speeds?
A: The UPD78F0034BGC-8BS-A is designed to operate at the specified clock speed. Operating beyond the specified limits may require a different microcontroller model.

Q: Is the UPD78F0034BGC-8BS-A suitable for industrial temperature ranges?
A: Yes, the UPD78F0034BGC-8BS-A is rated for industrial temperature ranges, making it suitable for harsh environments.


For similar functionalities, consider these alternatives to the UPD78F0034BGC-8BS-A:

  • ATmega8A: An 8-bit AVR microcontroller with similar features and performance characteristics.
  • PIC16F877A: This PIC microcontroller offers comparable capabilities to the UPD78F0034BGC-8BS-A for embedded control applications.



The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Product Category 8-bit Microcontrollers - MCU Mounting Style SMD/SMT
Package / Case LQFP-64 Core 78K0
Program Memory Size 32 kB Data Bus Width 8 bit
Maximum Clock Frequency 12 MHz Number of I/Os 51 I/O
Data RAM Size 1 kB Supply Voltage - Min 1.8 V
Supply Voltage - Max 5.5 V Minimum Operating Temperature - 40 C
Maximum Operating Temperature + 85 C Brand Renesas Electronics
Height 1.7 mm Interface Type 3-Wire/UART
Length 14 mm Number of Timers/Counters 3 Timer
Product Type 8-bit Microcontrollers - MCU Program Memory Type Flash
Subcategory Microcontrollers - MCU Width 14 mm

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