Renesas UPD78F0452GK(S)-GAJ-AX

Overview

UPD78F0452GK(S)-GAJ-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LE3 family, integrating an LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and a 10-bit A/D converter. It operates at up to 20 MHz, supports 5 V operation, and targets embedded control applications with integrated display interfaces such as industrial HMIs and portable instrumentation.

For engineers reviewing the UPD78F0452GK(S)-GAJ-AX datasheet, UPD78F0452GK(S)-GAJ-AX pinout, UPD78F0452GK(S)-GAJ-AX application, or UPD78F0452GK(S)-GAJ-AX equivalent, key selection criteria include LCD segment drive capability (up to 160 segments), Flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), and compatibility with RA78K0 assembler toolchain.

Technical Context

The UPD78F0452GK(S)-GAJ-AX implements the 78K0 CPU core with 16-bit addressing, supporting 139 instructions and 8-level priority interrupt handling. Its on-chip peripherals include a 16-bit timer array unit (TAU), watchdog timer, UART, I²C-compatible serial interface, and 10-bit A/D converter with 16 input channels.

It features dedicated LCD segment and common driver outputs (COM0–COM7, SEG0–SEG159), programmable bias voltage generation, and static/dynamic drive modes. The device uses SuperFlash® technology for program memory and includes EEPROM emulation support via Flash data flash area.

Key Specifications

Pinout & Package

The UPD78F0452GK(S)-GAJ-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 2.1.3 (78K0/LE3).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller with integrated LCD driver applications.

Compared with UPD78F0452GK(S)-GAJ-AX, the UPD78F0453GK(S)-GAJ-AX offers expanded serial I/O while maintaining full hardware compatibility, whereas the RL78/L12 trades LCD integration for superior energy efficiency and modern toolchain support - making it suitable only when display complexity is reduced.

Availability

UPD78F0452GK(S)-GAJ-AX is available at Aetrix Electronics and suitable for industrial HMIs, portable medical instruments, smart energy meters, and home appliance control boards requiring stable component supply and long-term production continuity.

Supply support for UPD78F0452GK(S)-GAJ-AX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics Corporation is a global semiconductor manufacturer headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0/LE3 product line delivers cost-optimized 8-bit MCUs with integrated LCD controllers for applications demanding display capability, moderate processing, and industrial temperature resilience - targeting legacy upgrade paths and cost-sensitive instrumentation.

FAQ

What is the maximum LCD segment count supported by the UPD78F0452GK(S)-GAJ-AX?

The UPD78F0452GK(S)-GAJ-AX supports up to 160 LCD segments using its integrated segment drivers (SEG0–SEG159) and 8 common outputs (COM0–COM7). This enables static or multiplexed (1/2 to 1/8 duty) drive configurations for alphanumeric or custom segment displays without external driver circuitry. The UPD78F0452GK(S)-GAJ-AX datasheet confirms this capability in Section 1.1 and Figure 1.1 of the Hardware User's Manual (R01UH0180EJ0200).

Does the UPD78F0452GK(S)-GAJ-AX include on-chip EEPROM or data retention memory?

The UPD78F0452GK(S)-GAJ-AX does not contain physical EEPROM but provides 1 KB of data flash memory within its 64 KB main Flash array, configured for EEPROM emulation using Renesas' TM Emulation Library Type01. This allows byte-wise read/write operations with 10,000 erase/write cycles and data retention exceeding 20 years at 85°C. The UPD78F0452GK(S)-GAJ-AX leverages this for storing calibration data, user settings, or counters in applications like portable instruments.

What development tools are officially supported for the UPD78F0452GK(S)-GAJ-AX?

Renesas officially supports the QB-MINI2 on-chip debug emulator with programming function and the RA78K0 Ver.4.01 assembler toolchain for the UPD78F0452GK(S)-GAJ-AX. The CC78K0 C compiler (Ver.3.70/4.00) and ID78K0-QB integrated debugger are also validated. These tools are documented in the UPD78F0452GK(S)-GAJ-AX-related sections of U18371E, U17199E, and U18330E manuals. The UPD78F0452GK(S)-GAJ-AX requires no external debug header due to single-wire interface support.

What is the operating voltage range and associated I/O tolerance for the UPD78F0452GK(S)-GAJ-AX?

The UPD78F0452GK(S)-GAJ-AX operates from 4.0 V to 5.5 V on VDD, with all general-purpose I/O pins rated for 5 V tolerance - enabling direct interfacing with legacy 5 V logic, sensors, and displays without level-shifting. The analog section (AVDD/AVSS) must be supplied within the same range, and the device maintains full functionality across the entire voltage window. This specification is confirmed in Electrical Characteristics Table 4.1 of the UPD78F0452GK(S)-GAJ-AX Hardware User's Manual.

How many A/D input channels and what resolution does the UPD78F0452GK(S)-GAJ-AX provide?

The UPD78F0452GK(S)-GAJ-AX integrates a 10-bit successive-approximation A/D converter with 16 selectable analog input channels (AN0–AN15), supporting both single-ended and differential input modes. Conversion time is 12.5 μs at 20 MHz system clock, and hardware averaging over 4 samples is supported to enhance effective resolution. This capability is detailed in Section 4.3.2 of the UPD78F0452GK(S)-GAJ-AX User's Manual (R01UH0180EJ0200).