Renesas UPD78F9489GK-9EU-A

Overview

UPD78F9489GK-9EU-A from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K/0S family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and integrated LCD controller/driver with up to 28 segments × 4 commons. It operates at up to 20 MHz, supports 10-bit A/D conversion (16 channels), and includes UART, I²C-compatible serial interface, and multiple 8-bit timers (T50/T60/T61) for PWM and carrier generation. It targets embedded control in industrial HMI and portable instrumentation.

For engineers reviewing the UPD78F9489GK-9EU-A datasheet, UPD78F9489GK-9EU-A pinout, UPD78F9489GK-9EU-A application, or UPD78F9489GK-9EU-A equivalent, key selection criteria include Flash endurance (100k write/erase cycles), LCD bias support (1/3–1/4 duty, 1/2–1/3 bias), standby current (≤1.5 µA), operating voltage range (1.8–5.5 V), and compliance with industrial temperature grade (−40°C to +85°C).

Technical Context

The UPD78F9489GK-9EU-A implements the 78K/0S CPU core with 16-bit addressing, supporting 131 instructions and 8-level hardware stack. Its on-chip peripherals include a 10-bit A/D converter with sample-and-hold and programmable conversion start triggers, dual serial interfaces (UART and I²C-compatible SI20), and three independent 8-bit timer modules optimized for PWM output, interval timing, and external event counting.

It integrates an LCD controller/driver capable of static or multiplexed drive (up to 4 commons), with programmable bias voltage generation (VLC0–VLC2), internal charge pump, and automatic waveform generation. The device uses a single crystal oscillator (X1/X2) or external clock input (XT1/XT2), and supports multiple low-power modes including HALT and STOP with wake-up via interrupt or reset.

Key Specifications

Pinout & Package

UPD78F9489GK-9EU-A 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 Renesas User's Manual U15331EJ4V1UD, including dedicated LCD segment/common drivers (S0–S27, COM0–COM3), analog supply pins (AVDD/AVSS), and dual clock inputs (X1/X2 and XT1/XT2) for flexible timing source selection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100PLAFB#30 and UPD78F1142GA-UEU-AX, the UPD78F9489GK-9EU-A offers highest on-chip LCD segment capacity and largest Flash in its legacy 78K/0S lineage, making it optimal for cost-sensitive, LCD-intensive industrial designs where migration to RL78 is not yet justified.

Availability

UPD78F9489GK-9EU-A is available at Aetrix Electronics and suitable for industrial panel meters, portable medical devices, and smart home thermostats requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for UPD78F9489GK-9EU-A 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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and SoC solutions.

The UPD78F9489GK-9EU-A belongs to the 78K/0S microcontroller family, designed specifically for cost-effective, LCD-integrated embedded control in industrial and consumer instrumentation where high peripheral integration and low standby power are critical.

FAQ

What is the maximum operating frequency of the UPD78F9489GK-9EU-A?

The UPD78F9489GK-9EU-A supports a maximum CPU clock frequency of 20 MHz when using the on-chip oscillator with an external crystal connected to X1/X2. At this speed, instruction execution time is 0.2 µs per basic instruction cycle. The device also accepts external clock inputs up to 20 MHz via XT1/XT2, enabling synchronization with system-level timing sources without oscillator startup delay.

Does the UPD78F9489GK-9EU-A support in-circuit debugging?

Yes, the UPD78F9489GK-9EU-A supports in-circuit debugging via the single-wire debug interface compatible with Renesas IE-78K0S-NS emulators and ID78K0S-NS integrated debuggers. Debug functionality includes breakpoint setting, register inspection, and real-time memory access without halting peripheral operation - essential for validating timing-critical LCD and A/D sequences during development.

What LCD configuration options does the UPD78F9489GK-9EU-A support?

The UPD78F9489GK-9EU-A supports static, 1/2-, 1/3-, and 1/4-duty LCD drive with selectable bias voltages (1/2 or 1/3). Its 28 segment outputs (S0–S27) and 4 common outputs (COM0–COM3) enable direct connection to displays up to 28×4 segments. Internal charge pump and voltage dividers eliminate need for external bias generation, simplifying design for compact instrumentation displays.

Is the UPD78F9489GK-9EU-A RoHS compliant and lead-free?

Yes, the UPD78F9489GK-9EU-A is a lead-free, RoHS-compliant device manufactured under Renesas' lead-free product program. The "-9EU-A" suffix denotes lead-free (Pb-free) packaging with matte tin plating. It meets JEDEC J-STD-020 moisture sensitivity level 3 and is qualified for reflow soldering per Renesas Recommended Soldering Conditions (Chapter 25 of U15331EJ4V1UD).

What is the guaranteed data retention period for the on-chip Flash memory in UPD78F9489GK-9EU-A?

The on-chip Flash memory in the UPD78F9489GK-9EU-A guarantees 20 years of data retention under normal operating conditions (Ta = 25°C) and after 100,000 write/erase cycles. Retention is specified per Renesas Electrical Specifications (Chapter 22, U15331EJ4V1UD) and validated across the full industrial temperature range (−40°C to +85°C), ensuring firmware integrity in unattended equipment.