Renesas UPD78F0443GB(R)-GAH-AX

Overview

UPD78F0443GB(R)-GAH-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LE3 family, integrating LCD controller/driver, 64 KB on-chip Flash, 4 KB RAM, and a 10-bit ADC. It operates at up to 20 MHz with supply voltage 2.7–5.5 V and targets low-power embedded instrumentation with integrated display. It supports 128-segment LCD drive and includes UART, I²C, and timer peripherals.

For engineers reviewing the UPD78F0443GB(R)-GAH-AX datasheet, UPD78F0443GB(R)-GAH-AX pinout, UPD78F0443GB(R)-GAH-AX application, or UPD78F0443GB(R)-GAH-AX equivalent, key selection criteria include LCD segment count support, Flash endurance (100,000 write/erase cycles), operating temperature range (−40°C to +85°C), and compatibility with RA78K0 toolchain for C/assembly development.

Technical Context

The UPD78F0443GB(R)-GAH-AX implements the 78K0 CPU core with 16-bit address space and Harvard architecture, supporting 131 instructions including bit manipulation and multi-byte arithmetic. Its on-chip LCD controller drives up to 128 segments using static or 1/2–1/4 duty methods with internal bias generation and COM/SEG output buffers.

It features a 10-bit successive-approximation ADC with 16 input channels, programmable conversion clock, and scan mode; a 16-bit real-time counter with calendar function; and three 16-bit timer arrays supporting PWM, input capture, and interval timing. Power management includes HALT, STOP, and sub-active modes with wake-up via external interrupt or RTC alarm.

Key Specifications

Pinout & Package

UPD78F0443GB(R)-GAH-AX is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include 82 general-purpose I/Os, 16 LCD segment outputs (SEG0–SEG15), 8 LCD common outputs (COM0–COM7), analog inputs (AN0–AN15), and dedicated peripheral pins (TXD0/RXD0, SCL/SDA, etc.).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0443GB(R)-GAH-AX, R5F100PLGSP#30 offers modern low-power architecture but lacks LCD integration, increasing component count; UPD78F0444GB(R)-GAH-AX provides seamless pin-compatible Flash/RAM scaling within the same legacy platform.

Availability

UPD78F0443GB(R)-GAH-AX is available at Aetrix Electronics and suitable for industrial panel meters, home appliance control panels, portable medical devices, and smart energy meters requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F0443GB(R)-GAH-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 consumer markets.

The 78K0/LE3 product line delivers cost-optimized 8-bit MCUs with integrated LCD controllers for embedded instrumentation and human-interface applications where display integration and legacy toolchain compatibility are critical.

FAQ

What is the maximum LCD segment count supported by UPD78F0443GB(R)-GAH-AX?

The UPD78F0443GB(R)-GAH-AX supports up to 128 LCD segments using its integrated controller with static, 1/2, or 1/4 duty drive methods. This capability is confirmed in the 78K0/Lx3 Hardware User's Manual Rev.2.00, Section 1.1 and Figure 1.1. The device provides eight COM outputs (COM0–COM7) and sixteen SEG outputs (SEG0–SEG15), enabling flexible display configurations without external drivers.

Does UPD78F0443GB(R)-GAH-AX include on-chip debug capability?

Yes, UPD78F0443GB(R)-GAH-AX supports on-chip debugging via the single-wire debug interface compatible with Renesas QB-MINI2 and QB-78K0LX3 emulators. This allows full breakpoint, step execution, and register/memory inspection without requiring additional debug hardware. The interface is enabled by default and requires no external pull-ups or configuration fuses.

What is the Flash endurance specification for UPD78F0443GB(R)-GAH-AX?

The UPD78F0443GB(R)-GAH-AX specifies 100,000 write/erase cycles for its 64 KB on-chip Flash memory, as documented in the Electrical Characteristics section of the 78K0/Lx3 Hardware User's Manual Rev.2.00. This endurance rating applies under standard operating conditions (25°C, VDD = 5.0 V) and supports robust firmware updates and field reprogramming in industrial applications.

Can UPD78F0443GB(R)-GAH-AX operate from a 3.3 V supply?

Yes, UPD78F0443GB(R)-GAH-AX operates across a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. All I/Os are 5 V tolerant when VDD ≥ 3.0 V, allowing safe interfacing with both 3.3 V and 5 V peripherals without level shifters. This is verified in the Absolute Maximum Ratings and DC Characteristics tables of the official datasheet.

Is there built-in EEPROM functionality in UPD78F0443GB(R)-GAH-AX?

UPD78F0443GB(R)-GAH-AX does not include dedicated EEPROM, but provides 1 KB of on-chip data flash memory that can be used for EEPROM emulation. Renesas supplies library routines (e.g., EEPROM Emulation Library Type01) to manage wear leveling, erase/write sequencing, and data retention-enabling reliable nonvolatile storage without external components.