Renesas UPD78F8054GC(R)-UEU-AX

Overview

UPD78F8054GC(R)-UEU-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LG3-M family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and a 20 MHz max CPU clock. It integrates 12-bit ADC (32 channels), 16-bit timer arrays, UART/SIO/I²C interfaces, and operates from 2.7–5.5 V supply. It targets industrial control panels requiring compact, low-power embedded logic with analog sensing.

For engineers reviewing the UPD78F8054GC(R)-UEU-AX datasheet, UPD78F8054GC(R)-UEU-AX pinout, UPD78F8054GC(R)-UEU-AX application, or UPD78F8054GC(R)-UEU-AX equivalent, key selection criteria include Flash endurance (100k write/erase cycles), segment LCD driver support (up to 240 segments), and built-in BCD arithmetic instructions for display-centric firmware.

Technical Context

The UPD78F8054GC(R)-UEU-AX implements the 78K0S CPU core with 16-bit address space and Harvard architecture. It supports three power-saving modes-HALT, STOP, and SNOOZE-with wake-up via external interrupt, RTC alarm, or ADC conversion completion.

Its peripheral set includes a 12-bit A/D converter with sample-and-hold and programmable conversion timing, dual 16-bit timer arrays with PWM output capability, and a dedicated LCD controller supporting static to 1/4-duty drive with internal bias generation and charge pump.

Key Specifications

Pinout & Package

UPD78F8054GC(R)-UEU-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 the 78K0/LG3-M hardware manual Rev.2.00.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LEAFB#30, UPD78F8054GC(R)-UEU-AX provides higher Flash density and native LCD driving but consumes more active current; versus UPD78F8055GC(R)-UEU-AX, it offers identical functionality at lower cost and reduced Flash overhead for mature, size-constrained applications.

Availability

UPD78F8054GC(R)-UEU-AX is available at Aetrix Electronics and suitable for industrial control panels, portable test instruments, and energy meter interface modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for UPD78F8054GC(R)-UEU-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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0/LG3-M product line, including UPD78F8054GC(R)-UEU-AX, was designed for cost-effective, high-integration embedded control in resource-constrained industrial HMI and sensor interface applications.

FAQ

What is the maximum operating frequency of the UPD78F8054GC(R)-UEU-AX?

The UPD78F8054GC(R)-UEU-AX supports a maximum CPU clock frequency of 20 MHz. This is achievable using either the internal high-speed oscillator or an external crystal connected to XT1/XT2 pins. The actual system clock may be divided via the on-chip clock divider to meet specific timing requirements for peripherals like UART or ADC sampling.

Does the UPD78F8054GC(R)-UEU-AX include a hardware real-time clock (RTC)?

Yes, the UPD78F8054GC(R)-UEU-AX integrates a dedicated RTC module with calendar function (year/month/day/hour/minute/second), alarm interrupt, and periodic interrupt capability. It supports battery backup via the VBACK pin and maintains timekeeping in STOP mode with typical current consumption of 0.7 μA.

How many analog input channels does the UPD78F8054GC(R)-UEU-AX support?

The UPD78F8054GC(R)-UEU-AX features a 12-bit successive approximation ADC with 32 analog input channels (ANI00–ANI31). These are distributed across multiple I/O ports and support selectable reference voltages (AVREF, VDD, or internal 2.5 V), enabling flexible sensor interfacing in industrial measurement applications.

Is the UPD78F8054GC(R)-UEU-AX pin-compatible with other devices in the 78K0/LG3-M family?

Yes, the UPD78F8054GC(R)-UEU-AX shares the same 100-pin LQFP package and pinout with UPD78F8055GC(R)-UEU-AX. This allows direct PCB-level replacement when upgrading to the 256 KB Flash variant without layout changes, provided software accommodates the increased memory map.

What development tools are officially supported for the UPD78F8054GC(R)-UEU-AX?

Renesas provides official support for the UPD78F8054GC(R)-UEU-AX via the CS+ (formerly CubeSuite+) IDE, the E8a in-circuit debugger, and the PG-FP5 Flash programmer. The 78K0/Lx3-M User's Manual (Rev.2.00) and 78K/0 Series Instructions User's Manual (U12326E) serve as primary documentation resources.