Renesas UPD78F0432GB(S)-GAG-AX

Overview

UPD78F0432GB(S)-GAG-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/LD3 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 includes UART, I²C, and timer peripherals - deployed in industrial panel meters and portable medical displays requiring low-power segment-based LCD driving.

For engineers reviewing the UPD78F0432GB(S)-GAG-AX datasheet, UPD78F0432GB(S)-GAG-AX pinout, UPD78F0432GB(S)-GAG-AX application, or UPD78F0432GB(S)-GAG-AX equivalent, key selection criteria include LCD segment drive capability (up to 288 segments), Flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), and compliance with industrial temperature grade (−40°C to +85°C).

Technical Context

The UPD78F0432GB(S)-GAG-AX implements the 78K0 CPU core with 16-bit addressing, supporting 131 instructions and 8-level hardware stack. Its LCD controller supports static, 2-, 3-, and 4-multiplex drive modes with programmable bias and frame frequency control, directly managing COM and SEG outputs without external drivers.

Peripheral integration includes a 16-bit multifunction timer (with input capture, output compare, PWM), a watchdog timer with independent clock source, and a 10-bit A/D converter with internal reference (1.45 V) and scan mode for sequential channel conversion - all accessible via dedicated SFRs mapped in the 78K0 memory space.

Key Specifications

Pinout & Package

UPD78F0432GB(S)-GAG-AX is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas User's Manual Rev.2.00 (R01UH0180EJ0200), Section 1.4.2 and 2.1.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0432GB(S)-GAG-AX, R5F100LGAFB#30 offers lower active current but demands hardware redesign due to non-pin-compatible LCD interface, while HD64F3687FP provides greater memory headroom at the cost of added component count and layout effort for LCD driving.

Availability

UPD78F0432GB(S)-GAG-AX is available at Aetrix Electronics and suitable for industrial panel meters, portable medical monitors, home appliance control units, and smart HVAC thermostats requiring stable component supply and long-term production continuity.

Supply support for UPD78F0432GB(S)-GAG-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/LD3 product line - including UPD78F0432GB(S)-GAG-AX - was designed for cost-sensitive, LCD-equipped embedded systems requiring high integration, low power, and industrial-grade reliability without external display drivers.

FAQ

What is the maximum LCD segment count supported by UPD78F0432GB(S)-GAG-AX?

The UPD78F0432GB(S)-GAG-AX supports up to 288 LCD segments using its integrated controller - configured as 8 COM × 36 SEG (static/2-mux) or 4 COM × 72 SEG (4-mux). This capability is confirmed in Section 1.1 and Figure 1.1 of the Renesas 78K0/Lx3 Hardware User's Manual Rev.2.00. The UPD78F0432GB(S)-GAG-AX does not require external segment drivers, reducing system component count.

Does UPD78F0432GB(S)-GAG-AX include an internal voltage reference for the ADC?

Yes, UPD78F0432GB(S)-GAG-AX integrates a precision 1.45 V internal reference for its 10-bit ADC, enabling stable conversion results independent of VDD fluctuations. This reference is selectable via ADCS register bit ADREF and is documented in Section 4.3.2 of the User's Manual. The UPD78F0432GB(S)-GAG-AX also supports external reference inputs on AVREF pin for higher accuracy applications.

What is the Flash endurance specification for UPD78F0432GB(S)-GAG-AX?

The UPD78F0432GB(S)-GAG-AX specifies 10,000 write/erase cycles for its 64 KB on-chip Flash memory, as stated in the Electrical Characteristics section of the datasheet. This endurance rating applies under standard operating conditions (25°C, VDD = 5.0 V) and supports firmware updates and parameter storage in field-deployed equipment. The UPD78F0432GB(S)-GAG-AX also supports EEPROM emulation using Flash sectors via Renesas' official library.

Is UPD78F0432GB(S)-GAG-AX qualified for industrial temperature operation?

Yes, UPD78F0432GB(S)-GAG-AX is rated for industrial temperature range operation from −40°C to +85°C, consistent with Renesas' "Standard" quality grade classification per document C11531E. This qualification is verified across all electrical parameters in the datasheet and supports deployment in factory automation, building controls, and outdoor instrumentation where ambient extremes occur. The UPD78F0432GB(S)-GAG-AX meets this spec without derating.

What development tools are officially supported for UPD78F0432GB(S)-GAG-AX?

Renesas officially supports QB-MINI2 on-chip debugger and RA78K0 assembler (Ver. 4.01) or CC78K0 C compiler (Ver. 4.00) for UPD78F0432GB(S)-GAG-AX firmware development. The QB-78K0LX3 emulator and PG-FP5 programmer are also compatible. These tools are listed in the "Related Documents" section of the UPD78F0432GB(S)-GAG-AX User's Manual, and the UPD78F0432GB(S)-GAG-AX device files are included in the IDE versions specified.