Renesas UPD78F0546AGK(R)-GAK-AX

Overview

UPD78F0546AGK(R)-GAK-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KF2 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 16-bit timer arrays, and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the UPD78F0546AGK(R)-GAK-AX datasheet, UPD78F0546AGK(R)-GAK-AX pinout, UPD78F0546AGK(R)-GAK-AX application, or UPD78F0546AGK(R)-GAK-AX equivalent, key selection considerations include Flash endurance (100,000 write/erase cycles), A/D conversion time (1.1 μs typical), supply voltage range (2.7–5.5 V), and QFP-64 package compatibility with legacy 78K0/KF2 designs.

Technical Context

The UPD78F0546AGK(R)-GAK-AX implements the 78K0 CPU core with 16-bit address space and supports both conventional-specification and expanded-specification operation modes. Its peripheral set includes three 16-bit timer arrays (each with capture/compare/PWM functions), a serial interface capable of UART/I²C/SPI emulation, and a 10-bit A/D converter with programmable sampling time and internal reference options.

It operates from a single 2.7–5.5 V supply, supports on-chip voltage regulator (REGC pin), and features power-saving modes including HALT and STOP. The device uses SuperFlash® technology for Flash memory, enabling fast erase (10 ms per block) and guaranteed data retention for 20 years at 85°C.

Key Specifications

Pinout & Package

UPD78F0546AGK(R)-GAK-AX is housed in a 64-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual Rev.4.01, Section 2.1.5 (78K0/KF2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0546AGK(R)-GAK-AX, R5F104PJAFB#30 offers lower system cost but sacrifices Flash capacity and A/D channel count, while UPD78F0547AGK(R)-GAK-AX provides seamless scalability with identical footprint and driver compatibility.

Availability

UPD78F0546AGK(R)-GAK-AX is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, and smart power outlets requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0546AGK(R)-GAK-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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The 78K0/KF2 product line delivers cost-optimized, high-reliability 8-bit MCUs for deterministic real-time control in resource-constrained embedded systems, emphasizing Flash endurance, low-power operation, and legacy code compatibility.

FAQ

What is the maximum operating frequency of the UPD78F0546AGK(R)-GAK-AX?

The UPD78F0546AGK(R)-GAK-AX operates at a maximum frequency of 20 MHz using an external crystal (X1) or ceramic resonator. This frequency is achieved with a 1.1 μs minimum instruction cycle time and requires proper configuration of the system clock divider and oscillator stabilization time per Renesas Hardware User's Manual Rev.4.01 Section 1.1.3. The device supports both high-speed and low-speed clock modes to balance performance and power consumption.

Does the UPD78F0546AGK(R)-GAK-AX support in-system programming (ISP)?

Yes, the UPD78F0546AGK(R)-GAK-AX supports in-system programming via its on-chip Flash memory and integrated self-programming library. Using the ROM-resident library, firmware updates can be performed without removing the device from the board. The UPD78F0546AGK(R)-GAK-AX requires only standard VDD, VSS, and RESET connections during programming, and supports block erase in ≤10 ms with no external high-voltage source needed.

What are the A/D converter specifications for the UPD78F0546AGK(R)-GAK-AX?

The UPD78F0546AGK(R)-GAK-AX integrates a 10-bit successive-approximation A/D converter with 16 input channels, 1.1 μs typical conversion time, and selectable reference sources (internal 2.5 V bandgap or external AVREF). It supports software start, timer-triggered, and external trigger modes, and includes built-in sample-and-hold functionality. Accuracy is specified as ±2 LSB INL and ±1 LSB DNL over the full industrial temperature range.

Is the UPD78F0546AGK(R)-GAK-AX pin-compatible with other 78K0/KF2 devices?

Yes, the UPD78F0546AGK(R)-GAK-AX shares the same 64-pin LQFP package and pin assignment with all members of the 78K0/KF2 family, including UPD78F0544AGK(R)-GAK-AX, UPD78F0545AGK(R)-GAK-AX, and UPD78F0547AGK(R)-GAK-AX. Pin functions-including power, reset, oscillator, and port I/O-are identical across the family, enabling hardware reuse and migration paths based on Flash size and peripheral requirements.

What debug interface does the UPD78F0546AGK(R)-GAK-AX support?

The UPD78F0546AGK(R)-GAK-AX supports Renesas' single-pin On-Chip Debug Support (OCDS) interface, compatible with the QB-MINI2 on-chip debug emulator. This interface enables full breakpoint, step execution, and register/memory inspection without dedicated debug pins-using only the RESET pin for communication. No additional PCB traces or connectors are required beyond standard programming and reset circuitry.