Renesas UPD78F0546AGK-GAK-AX

Overview

UPD78F0546AGK-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 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz CPU frequency with 10-bit A/D converter (8 channels), serial interface (UART, CSI, I²C), and supports industrial temperature range (−40°C to +85°C) in a 64-pin LQFP package. It is used in motor control subsystems for HVAC blowers and small appliance power management.

For engineers reviewing the UPD78F0546AGK-GAK-AX datasheet, UPD78F0546AGK-GAK-AX pinout, UPD78F0546AGK-GAK-AX application, or UPD78F0546AGK-GAK-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), A/D conversion time (1.2 μs typical), interrupt latency (2.5 μs min), and support for on-chip self-programming library v1.0.

Technical Context

The UPD78F0546AGK-GAK-AX implements the 78K0 CPU core with 16-bit ALU and 8-bit data bus, executing instructions in 1–4 clock cycles. It integrates a programmable watchdog timer, voltage monitor (LVI), and on-chip oscillator (1 to 20 MHz) with external crystal support via X1/X2 pins.

Its peripheral set includes three 16-bit timers (T0–T2) with capture/compare and PWM generation, one 8-bit reload timer (T3), and dual serial interfaces supporting full-duplex UART and synchronous CSI with master/slave mode - all mapped to dedicated port pins without software remapping.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0546AGK-GAK-AX, R5F104PJAFB#30 reduces active current by 40% but sacrifices 16-bit timer precision and hardware multiply; STM8S207R8T6 offers faster A/D but adds BOM cost for external reset IC and lacks Flash self-programming library certification.

Availability

UPD78F0546AGK-GAK-AX is available at Aetrix Electronics and suitable for motor control, industrial sensor interface, and home appliance UI applications requiring stable component supply and long-term lifecycle support.

Supply support for UPD78F0546AGK-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The 78K0/KF2 product line delivers cost-optimized 8-bit MCUs targeting industrial automation, consumer white goods, and building control systems with emphasis on Flash reliability and peripheral integration.

FAQ

What is the maximum operating frequency supported by the UPD78F0546AGK-GAK-AX?

The UPD78F0546AGK-GAK-AX supports a maximum CPU operating frequency of 20 MHz, achieved using either the on-chip oscillator or an external crystal connected to X1/X2 pins. At this frequency, the device executes instructions in 1–4 clock cycles, enabling sub-microsecond interrupt response times essential for real-time motor control loops. The UPD78F0546AGK-GAK-AX datasheet specifies timing margins for all peripherals-including timers, UART, and A/D-under this condition.

Does the UPD78F0546AGK-GAK-AX include on-chip debug support?

Yes, the UPD78F0546AGK-GAK-AX includes on-chip debugging capability compatible with Renesas QB-MINI2 and ID78K0-QB tools. It supports full breakpoint, watchpoint, and memory inspection via single-wire SWD interface without requiring additional debug pins. This feature enables in-system programming and real-time variable monitoring during development of UPD78F0546AGK-GAK-AX-based applications.

What is the Flash memory endurance specification for the UPD78F0546AGK-GAK-AX?

The UPD78F0546AGK-GAK-AX guarantees 100,000 write/erase cycles for its 64 KB on-chip Flash memory, with data retention exceeding 20 years at +85°C ambient temperature. This endurance rating is validated per Renesas' flash qualification standards and applies to both standard programming and self-programming operations using the certified Type01 Self Programming Library included with the UPD78F0546AGK-GAK-AX toolchain.

Can the UPD78F0546AGK-GAK-AX operate from a 3.3 V supply?

Yes, the UPD78F0546AGK-GAK-AX operates across a supply voltage range of 2.7 V to 5.5 V, making it fully compatible with standard 3.3 V logic systems. Its I/O pins are 5 V tolerant when configured as inputs, and internal regulators maintain stable core voltage regardless of rail variation. This flexibility allows direct integration into UPD78F0546AGK-GAK-AX designs powered by common 3.3 V switching regulators without level shifters.

How many A/D input channels does the UPD78F0546AGK-GAK-AX support?

The UPD78F0546AGK-GAK-AX integrates an 10-bit successive-approximation A/D converter with 8 selectable input channels (CH0–CH7), all multiplexed onto Port 0 pins (P00–P07). Conversion time is specified at 1.2 μs typical, and the module supports scan mode, trigger start via timer overflow, and result buffering in dedicated SFRs - features confirmed in the UPD78F0546AGK-GAK-AX Hardware User's Manual Rev.4.01.