Renesas UPD78F0403GA(R)-GAM-AX

Overview

UPD78F0403GA(R)-GAM-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/Lx3 family, featuring integrated LCD controller/driver, 64 KB on-chip Flash memory, 4 KB RAM, and a 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz, supports 5 V operation, and targets embedded control applications with display interfaces such as industrial HMIs and portable instrumentation.

For engineers reviewing the UPD78F0403GA(R)-GAM-AX datasheet, UPD78F0403GA(R)-GAM-AX pinout, UPD78F0403GA(R)-GAM-AX application, or UPD78F0403GA(R)-GAM-AX equivalent, key selection criteria include LCD segment drive count (up to 192 segments), Flash endurance (10,000 write/erase cycles), operating temperature range (−40°C to +85°C), and availability of on-chip voltage regulator (REGC pin) for internal logic supply stabilization.

Technical Context

The UPD78F0403GA(R)-GAM-AX implements the 78K0 CPU core with 16-bit address space, supporting both 8-bit and 16-bit arithmetic operations. Its peripheral set includes a 10-bit A/D converter with 8 input channels, serial interface (UART/CSI), real-time counter (RTC), and watchdog timer - all synchronized to a single system clock domain derived from internal oscillator or external crystal.

Hardware LCD control is implemented via dedicated segment/common driver circuitry supporting static, 1/2-, 1/3-, or 1/4-duty drive modes with programmable bias voltage and frame frequency. The device uses a 64-pin LQFP package with dedicated COM/SEG pins mapped to ports P10–P15 and P8–P9, enabling direct connection to multiplexed LCD glass without external drivers.

Key Specifications

Pinout & Package

This device is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow Renesas' 78K0/LC3 variant layout, including dedicated LCD segment (SEG0–SEG47) and common (COM0–COM7) terminals, plus REGC for internal voltage regulation.

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 UPD78F0403GA(R)-GAM-AX, R5F100BGASP#V0 offers higher performance and better energy efficiency but mandates layout revision, while MB95560PFT-G-SNE1 provides more RAM at the cost of added external regulation - making UPD78F0403GA(R)-GAM-AX optimal for cost-sensitive, drop-in LCD-centric designs with stable 5 V supply.

Availability

UPD78F0403GA(R)-GAM-AX is available at Aetrix Electronics and suitable for industrial HMIs, portable medical monitors, smart energy meters, and home appliance control boards requiring stable component supply and long-term production support.

Supply support for UPD78F0403GA(R)-GAM-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, and power devices for industrial, automotive, and infrastructure markets.

The 78K0/Lx3 product line delivers cost-optimized 8-bit MCUs with integrated peripherals-including LCD controllers-for display-driven embedded systems where code density, low power, and hardware simplicity are prioritized over raw throughput.

FAQ

What is the maximum LCD segment count supported by UPD78F0403GA(R)-GAM-AX?

The UPD78F0403GA(R)-GAM-AX supports up to 192 LCD segments when configured in static drive mode or with 1/2-, 1/3-, or 1/4-duty multiplexing. This is achieved using dedicated SEG0–SEG47 and COM0–COM7 pins, with segment assignment controlled via internal LCD register settings. The UPD78F0403GA(R)-GAM-AX datasheet confirms this limit applies specifically to the LC3 variant, which matches the part number's suffix and package configuration.

Does UPD78F0403GA(R)-GAM-AX include an internal voltage regulator?

Yes, the UPD78F0403GA(R)-GAM-AX includes an internal voltage regulator controlled via the REGC pin. When a 1 μF ceramic capacitor is connected between REGC and VSS, the device generates a stable ~3.3 V supply for internal logic circuits. This feature is documented in Section 2.2.17 of the 78K0/Lx3 Hardware User's Manual and reduces dependency on external regulators in 5 V system designs. The UPD78F0403GA(R)-GAM-AX requires this configuration for guaranteed operation across its full temperature range.

What is the Flash memory endurance rating for UPD78F0403GA(R)-GAM-AX?

The UPD78F0403GA(R)-GAM-AX specifies 10,000 write/erase cycles for its 64 KB on-chip Flash memory, as confirmed in the Electrical Characteristics section of the official Renesas datasheet. This endurance level supports field firmware updates in applications like smart meters or medical devices where infrequent reprogramming is expected. The UPD78F0403GA(R)-GAM-AX also includes flash lock bits to prevent accidental overwrite during normal operation.

Can UPD78F0403GA(R)-GAM-AX operate without an external crystal?

Yes, the UPD78F0403GA(R)-GAM-AX can operate using its internal high-speed oscillator (HSO) running at 20 MHz, eliminating the need for an external crystal in non-precision timing applications. However, for RTC functionality or applications requiring accurate baud rates, an external 32.768 kHz crystal (for RTC) or 1–20 MHz crystal (for main clock) must be connected. The UPD78F0403GA(R)-GAM-AX supports both configurations via FLMD0 pin setting and system clock control registers.

What package type and pin count does UPD78F0403GA(R)-GAM-AX use?

The UPD78F0403GA(R)-GAM-AX uses a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, matching the 78K0/LC3 variant defined in Renesas' 78K0/Lx3 Hardware User's Manual. Pin configuration is verified in Section 1.4.1 and Figure 1.1 of Rev.2.00 (Feb 2011). This package provides full access to all LCD segment/common pins, I/O ports, and peripheral signals required for standalone display control applications. The UPD78F0403GA(R)-GAM-AX ordering code suffix "-GAM-AX" explicitly denotes this LQFP-64 variant.