Renesas UPD78F0534AGK-GAJ-AX

Overview

UPD78F0534AGK-GAJ-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KE2 family, featuring 64 KB on-chip Flash memory, 4 KB RAM, and a maximum operating frequency of 20 MHz. It integrates a 10-bit A/D converter with 16 channels, UART, I²C, and timer modules, and targets embedded control applications in industrial equipment and consumer appliances.

For engineers reviewing the UPD78F0534AGK-GAJ-AX datasheet, UPD78F0534AGK-GAJ-AX pinout, UPD78F0534AGK-GAJ-AX application, or UPD78F0534AGK-GAJ-AX equivalent, key selection considerations include its 64-pin LQFP package, 10-bit ADC resolution and channel count, Flash endurance (100,000 write/erase cycles), operating voltage range (2.7–5.5 V), and support for on-chip debug via single-wire interface.

Technical Context

The UPD78F0534AGK-GAJ-AX implements the 78K0 CPU core with 16-bit address space and supports both conventional- and expanded-specification modes. Its peripheral set includes three 16-bit timer/counters (one with PWM output), a watchdog timer, and a clock generation circuit supporting main system clock input (1–20 MHz) and sub-clock (32.768 kHz) operation.

It features a dedicated on-chip voltage regulator (REGC pin) enabling single-supply operation, and supports low-power modes including HALT and STOP. The device uses SuperFlash® technology for Flash memory, delivering guaranteed 100,000 erase/write cycles and 10-year data retention at 85°C.

Key Specifications

Pinout & Package

The UPD78F0534AGK-GAJ-AX is housed in a 64-pin LQFP package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual Rev.4.01 (R01UH0008EJ0401), Section 2.1.4 (78K0/KE2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100PLGSP#30, the UPD78F0534AGK-GAJ-AX offers higher Flash density and integrated voltage regulation but consumes more active current; versus UPD78F0537AGK-GAJ-AX, it provides identical functionality at lower cost and reduced memory overhead where 64 KB suffices.

Availability

UPD78F0534AGK-GAJ-AX is available at Aetrix Electronics and suitable for industrial motor control, home appliance HMI, smart power metering, and factory automation I/O modules requiring stable component supply across extended product lifecycles.

Supply support for UPD78F0534AGK-GAJ-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 infrastructure markets.

The 78K0/KE2 product line delivers cost-optimized 8-bit MCUs targeting resource-constrained embedded systems requiring high reliability, Flash flexibility, and analog integration - especially in white goods and industrial controls.

FAQ

What is the maximum operating frequency supported by the UPD78F0534AGK-GAJ-AX?

The UPD78F0534AGK-GAJ-AX supports a maximum operating frequency of 20 MHz when using the main system clock input. This corresponds to a minimum instruction cycle time of 50 ns. Operation at this frequency requires stable 2.7–5.5 V supply and proper decoupling; the device also supports sub-clock (32.768 kHz) for RTC and low-power modes. The UPD78F0534AGK-GAJ-AX maintains full peripheral functionality-including ADC sampling and UART baud rate generation-at this speed.

Does the UPD78F0534AGK-GAJ-AX include on-chip debug capability?

Yes, the UPD78F0534AGK-GAJ-AX supports on-chip debugging via a single-wire interface (SWI), requiring only one dedicated pin (BSY) plus VDD and VSS. This allows full breakpoint, step-through, and register inspection without halting real-time peripherals. Debug firmware is preloaded in ROM, eliminating the need for external debug probes in production programming. The UPD78F0534AGK-GAJ-AX is compatible with Renesas QB-MINI2 and ID78K0-QB tools.

What is the Flash memory endurance and data retention specification for the UPD78F0534AGK-GAJ-AX?

The UPD78F0534AGK-GAJ-AX guarantees 100,000 write/erase cycles and 10 years of data retention at 85°C, per Renesas documentation (R01UH0008EJ0401). These values apply to the entire 64 KB Flash array and are validated under specified voltage and temperature conditions. The UPD78F0534AGK-GAJ-AX implements wear-leveling support in its self-programming library to extend effective lifetime in EEPROM-emulation use cases.

Can the UPD78F0534AGK-GAJ-AX operate from a single 5 V supply?

Yes, the UPD78F0534AGK-GAJ-AX can operate from a single 5 V supply using its on-chip voltage regulator. Connecting a 2.2 μF ceramic capacitor between the REGC pin and VSS enables internal generation of a stable 3.3 V supply for core logic. This eliminates the need for an external LDO in 5 V systems. The UPD78F0534AGK-GAJ-AX maintains full functionality-including ADC accuracy and Flash programming-under this configuration.

How many analog input channels does the built-in A/D converter support on the UPD78F0534AGK-GAJ-AX?

The UPD78F0534AGK-GAJ-AX integrates a 10-bit successive-approximation A/D converter with up to 16 selectable input channels. These channels map to dedicated pins (e.g., AN0–AN15) and can be scanned in sequence or triggered individually. Conversion time is ≤1.5 μs per channel at 20 MHz operation. The UPD78F0534AGK-GAJ-AX supports both internal (2.5 V bandgap) and external AVREF references, enabling flexible sensor interfacing across varying signal ranges.