Renesas UPD78F0455GA-HAB-AX

Overview

UPD78F0455GA-HAB-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LE3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and 39 I/O pins in a 64-pin LQFP package. It operates at up to 20 MHz, supports 10-bit ADC with 16 channels, and targets low-power embedded applications requiring segment-based display control.

For engineers reviewing the UPD78F0455GA-HAB-AX datasheet, UPD78F0455GA-HAB-AX pinout, UPD78F0455GA-HAB-AX application, or UPD78F0455GA-HAB-AX equivalent, key selection criteria include LCD segment drive capability (up to 288 segments), Flash endurance (100,000 write/erase cycles), operating voltage range (1.8–5.5 V), and built-in real-time counter with calendar function for timekeeping in battery-powered devices.

Technical Context

The UPD78F0455GA-HAB-AX implements the 78K0 CPU core with 16-bit address space, Harvard architecture, and instruction set compatible with earlier 78K0 series. It integrates a programmable LCD controller supporting static to 1/4-duty drive with internal bias generation and adjustable contrast via VLC pins.

Peripheral integration includes a 16-bit timer array unit (TAU) with capture/compare, watchdog timer (WDT), UART/SIO, I²C-compatible serial interface, and on-chip power-on reset (POR) with low-voltage detection (LVD). All peripherals are memory-mapped and controlled via dedicated SFRs accessible in user mode.

Key Specifications

Pinout & Package

UPD78F0455GA-HAB-AX is housed in a 64-pin LQFP (Low-profile Quad Flat Package) with exposed thermal pad, JEDEC MS-026 compliant, 10 mm × 10 mm body size, 0.5 mm lead pitch, and RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0455GA-HAB-AX, R5F100LGSP offers modern low-power architecture but requires external LCD bias components, while UPD78F0533GA-GAH-AX provides seamless capacity scaling within the same family and pinout - making it ideal for design iteration without layout change.

Availability

UPD78F0455GA-HAB-AX is available at Aetrix Electronics and suitable for smart energy meters, home appliance control panels, portable medical devices, and industrial sensor nodes requiring stable component supply and long-term production support.

Supply support for UPD78F0455GA-HAB-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 leader headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The 78K0/Lx3 product line delivers cost-optimized, low-power 8-bit MCUs with integrated peripherals including LCD controllers, targeting display-centric embedded systems in white goods, metering, and portable equipment.

FAQ

What is the maximum LCD segment count supported by UPD78F0455GA-HAB-AX?

The UPD78F0455GA-HAB-AX supports up to 288 LCD segments in configurations ranging from static to 1/4-duty drive. This is achieved using its integrated LCD controller with COM0–COM7 outputs and configurable segment mapping across multiple I/O ports. The actual segment count depends on selected multiplex ratio and port assignment, as defined in the 78K0/Lx3 Hardware User's Manual Rev.2.00.

Does UPD78F0455GA-HAB-AX include a real-time counter with calendar functionality?

Yes, UPD78F0455GA-HAB-AX includes a dedicated real-time counter (RTC) module supporting calendar mode with year/month/day/hour/minute/second registers, automatic leap-year correction, and alarm interrupt. It operates from a 32.768 kHz crystal or sub-clock oscillator and retains time during standby when backed by VBAT or internal capacitor.

What is the Flash memory endurance specification for UPD78F0455GA-HAB-AX?

The on-chip Flash memory in UPD78F0455GA-HAB-AX is rated for 100,000 write/erase cycles under standard operating conditions (Ta = 25°C, VDD = 5.0 V). This endurance applies to both main program memory and data flash areas, and is validated per Renesas' reliability testing standards for 78K0/Lx3 devices.

Can UPD78F0455GA-HAB-AX operate from a 1.8 V supply?

Yes, UPD78F0455GA-HAB-AX supports full functionality across a supply voltage range of 1.8 V to 5.5 V. At 1.8 V, it operates up to 8 MHz (reduced from 20 MHz at 5 V), maintaining all peripherals including LCD controller, ADC, and serial interfaces - enabling battery-powered applications with single-cell Li-ion or alkaline sources.

Is the UPD78F0455GA-HAB-AX pin-compatible with other 78K0/LE3 devices?

UPD78F0455GA-HAB-AX shares the same 64-pin LQFP package and core pinout with other 78K0/LE3 members such as UPD78F0441–UPD78F0465, but functional pin assignments (e.g., LCD segment vs. GPIO) vary by variant. Pin compatibility for PCB reuse requires verification against the specific device's pin function table in Section 2.1.3 of the 78K0/Lx3 Hardware User's Manual.