Renesas UPD78F0485GK(R)-GAK-M1-AX

Overview

UPD78F0485GK(R)-GAK-M1-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 29 I/O pins in a 64-pin LQFP package. It operates at up to 20 MHz, supports 10-bit ADC with 12 channels, and targets low-power embedded applications requiring segment-based display control.

For engineers reviewing the UPD78F0485GK(R)-GAK-M1-AX datasheet, UPD78F0485GK(R)-GAK-M1-AX pinout, UPD78F0485GK(R)-GAK-M1-AX application, or UPD78F0485GK(R)-GAK-M1-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.

Technical Context

The UPD78F0485GK(R)-GAK-M1-AX implements the 78K0 CPU core with 16-bit address space and supports instruction execution in one to four clock cycles. Its on-chip peripherals include a 16-bit timer array unit (TAU) with capture/compare and PWM output, serial interface (UART, CSI, I²C), and watchdog timer with independent clock source.

It integrates a programmable LCD controller supporting static, 2-, 3-, and 4-multiplex driving with adjustable bias and frame frequency. The device uses SuperFlash® technology for Flash memory, enabling fast programming and high reliability across industrial temperature ranges (−40°C to +85°C).

Key Specifications

Pinout & Package

UPD78F0485GK(R)-GAK-M1-AX is housed in a 64-pin LQFP package (10 mm × 10 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.

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 UPD78F0485GK(R)-GAK-M1-AX, R5F10PLGKSP#V0 offers superior power efficiency and modern tooling but requires firmware porting, while UPD78F0475GK(R)-GAK-M1-AX provides exact pin and code compatibility at reduced memory-ideal for incremental cost optimization.

Availability

UPD78F0485GK(R)-GAK-M1-AX is available at Aetrix Electronics and suitable for smart energy meters, industrial HMI panels, portable medical devices, and home appliance control systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for UPD78F0485GK(R)-GAK-M1-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 IoT markets.

The 78K0/LF3 product line delivers cost-optimized 8-bit MCUs with integrated LCD drivers and low-power features specifically for display-intensive embedded applications in consumer and industrial equipment.

FAQ

What is the maximum LCD segment count supported by the UPD78F0485GK(R)-GAK-M1-AX?

The UPD78F0485GK(R)-GAK-M1-AX supports up to 288 LCD segments using 4-multiplex driving with COM0–COM7 and programmable segment mapping. This is achieved through dedicated COM outputs and flexible assignment of port pins as segment drivers, as specified in the 78K0/LF3 User's Manual Section 1.7 and 2.2.14–2.2.15. The UPD78F0485GK(R)-GAK-M1-AX does not require external segment drivers for standard alphanumeric or icon displays.

Does the UPD78F0485GK(R)-GAK-M1-AX include a hardware real-time counter with calendar function?

Yes, the UPD78F0485GK(R)-GAK-M1-AX integrates a hardware real-time counter (RTC) with full calendar functionality (year/month/day/hour/minute/second), alarm interrupt, and periodic interrupt generation. It operates from the 32.768 kHz sub-clock oscillator and retains time in STOP mode. This feature is documented in Section 1.1 and Chapter 5 of the 78K0/LF3 User's Manual (R01UH0180EJ0200), and the UPD78F0485GK(R)-GAK-M1-AX implements it without external components.

What is the operating voltage range and temperature grade for the UPD78F0485GK(R)-GAK-M1-AX?

The UPD78F0485GK(R)-GAK-M1-AX operates from 1.8 V to 5.5 V over the industrial temperature range of −40°C to +85°C. It is classified as a "Standard" quality grade device per Renesas documentation, intended for applications including industrial robots, office equipment, and home electronic appliances. This rating is confirmed in the "Quality Grades" section (Note 7) of the User's Manual and electrical specifications tables.

Can the UPD78F0485GK(R)-GAK-M1-AX perform in-system programming of its Flash memory?

Yes, the UPD78F0485GK(R)-GAK-M1-AX supports in-system programming (ISP) of its 64 KB on-chip Flash memory using the on-chip serial interface and standard 5 V or 3.3 V VDD supply-no external high-voltage programmer is required. This capability is enabled by SuperFlash® technology and is detailed in Application Note U18954E and the Flash memory programming section of the 78K0/LF3 User's Manual.

How many analog input channels does the 10-bit ADC in the UPD78F0485GK(R)-GAK-M1-AX support?

The UPD78F0485GK(R)-GAK-M1-AX includes a 10-bit successive-approximation ADC with 12 analog input channels, selectable via the AD converter control register. It features an internal 1.25 V reference and supports sampling rates up to 100 kSPS. This specification is listed in Section 1.1 (Features) and Table 11.1 (Electrical Characteristics) of the 78K0/LF3 User's Manual (R01UH0180EJ0200).