Renesas UPD78F0484GK(S)-GAK-AX

Overview

UPD78F0484GK(S)-GAK-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LF3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and 39 I/O pins. It operates at up to 20 MHz, supports 10-bit ADC with 12 channels, and targets low-power embedded applications such as portable instrumentation and industrial HMI panels.

For engineers reviewing the UPD78F0484GK(S)-GAK-AX datasheet, UPD78F0484GK(S)-GAK-AX pinout, UPD78F0484GK(S)-GAK-AX application, or UPD78F0484GK(S)-GAK-AX equivalent, key selection criteria include LCD segment drive capability (up to 240 segments), Flash endurance (100,000 write/erase cycles), operating voltage range (1.8–5.5 V), and support for on-chip debug via QB-MINI2.

Technical Context

The UPD78F0484GK(S)-GAK-AX implements the 78K0 CPU core with 16-bit address space, Harvard architecture, and instruction set compatible with earlier 78K0 devices. It integrates a 10-bit successive-approximation ADC with sample-and-hold, programmable gain amplifier input option, and internal reference voltage (1.6 V).

Its LCD controller supports static, 1/2-, 1/3-, and 1/4-duty drive with bias options (1/2, 1/3, or 1/4), COM/SEG output configuration up to 8×30, and built-in charge pump for VLCD generation. The device includes three 16-bit timer/counters (TM00–TM02), serial interface (UART/CSI), and watchdog timer with independent clock source.

Key Specifications

Pinout & Package

UPD78F0484GK(S)-GAK-AX is housed in an 80-pin LQFP package (12 mm × 12 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 1.4.4 and 2.1.4 for 78K0/LF3 group.

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 UPD78F0484GK(S)-GAK-AX, R5F100LEAFB#30 offers lower power but demands layout changes and new driver development, while UPD78F0533GA-GAD-AX provides seamless Flash capacity expansion without altering hardware design or qualification status.

Availability

UPD78F0484GK(S)-GAK-AX is available at Aetrix Electronics and suitable for portable medical instruments, industrial control panels, and smart energy meters requiring stable component supply and long-term production continuity.

Supply support for UPD78F0484GK(S)-GAK-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and consumer markets.

The 78K0/LF3 product line delivers cost-optimized 8-bit MCUs with integrated LCD controllers for applications where display integration, low power, and legacy code compatibility are critical design requirements.

FAQ

What is the maximum LCD segment count supported by the UPD78F0484GK(S)-GAK-AX?

The UPD78F0484GK(S)-GAK-AX supports up to 240 LCD segments using its integrated controller - configured as 8 common lines (COM0–COM7) and 30 segment lines (SEG0–SEG29). This allows static, 1/2-, 1/3-, or 1/4-duty drive with programmable bias settings, enabling flexible display sizing without external driver ICs. The UPD78F0484GK(S)-GAK-AX datasheet confirms this capability in Section 1.1 and Figure 1.11.

Does the UPD78F0484GK(S)-GAK-AX include on-chip debug capability?

Yes, the UPD78F0484GK(S)-GAK-AX supports on-chip debugging via a single-wire interface compatible with Renesas QB-MINI2 and QB-78K0LX3 emulators. Debug access uses dedicated pins (BKGD, RESN) and requires no additional hardware; firmware breakpoints, register inspection, and memory read/write are fully supported. This capability is documented in the UPD78F0484GK(S)-GAK-AX User's Manual Section 2.2.16 and Appendix D.

What is the Flash memory endurance specification for the UPD78F0484GK(S)-GAK-AX?

The UPD78F0484GK(S)-GAK-AX specifies 100,000 write/erase cycles for its 64 KB on-chip Flash memory, validated under standard operating conditions (Ta = 25°C, VDD = 5.0 V). Data retention is guaranteed for 20 years at 85°C or 100 years at 25°C. These values are published in the UPD78F0484GK(S)-GAK-AX Electrical Characteristics table (Section 24.2) and align with Renesas' SuperFlash® technology specifications.

Can the UPD78F0484GK(S)-GAK-AX operate from a single 3.3 V supply?

Yes, the UPD78F0484GK(S)-GAK-AX operates fully across 1.8 V to 5.5 V, including standard 3.3 V systems. At 3.3 V, it achieves up to 16 MHz CPU frequency (derated from 20 MHz at 5 V) and maintains all peripherals - LCD controller, ADC, timers, and UART - with no functional loss. The UPD78F0484GK(S)-GAK-AX Electrical Characteristics table (Section 24.1) confirms timing and voltage parameters for 3.3 V operation.

Is there a pin-compatible upgrade option for the UPD78F0484GK(S)-GAK-AX?

Yes, the UPD78F0533GA-GAD-AX is a pin-compatible upgrade offering 128 KB Flash and 6 KB RAM while retaining identical 80-pin LQFP packaging, LCD controller architecture, peripheral register map, and debug interface. No PCB or firmware changes are required beyond recompilation and Flash size adjustment. This upgrade path is explicitly documented in Renesas' 78K0/LF3 ordering information guide (Section 1.3) for the UPD78F0484GK(S)-GAK-AX.