Renesas UPD78F0547AGC(S)-GAD-AX

Overview

UPD78F0547AGC(S)-GAD-AX from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/KF2 family, featuring 128 KB on-chip Flash memory, 8 KB RAM, and a 16-bit timer/counter with PWM output capability. It operates at up to 20 MHz CPU clock frequency using an internal high-speed oscillator or external crystal (1–20 MHz), and supports 5V operation with 64-pin LQFP package. It is used in industrial control panels requiring deterministic real-time I/O handling and firmware-upgradable logic.

For engineers reviewing the UPD78F0547AGC(S)-GAD-AX datasheet, UPD78F0547AGC(S)-GAD-AX pinout, UPD78F0547AGC(S)-GAD-AX application, or UPD78F0547AGC(S)-GAD-AX equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), A/D conversion time (1.2 μs per channel), interrupt latency (3.5 μs min), and support for on-chip self-programming library v1.0.

Technical Context

The UPD78F0547AGC(S)-GAD-AX implements the 78K0S CPU core with 16-bit ALU, 16-level hardware stack, and 139 instructions. It integrates a 10-bit successive-approximation ADC with 16 input channels, four 16-bit timer/counters (including one event counter and one watchdog timer), and UART/SIO interfaces with programmable baud rate generation.

Its memory subsystem includes 128 KB Flash (organized as 512 × 256-byte blocks), 8 KB RAM, and 1 KB data flash for EEPROM emulation. The device uses a dual-voltage architecture: EVDD/EVSS for analog peripherals and VDD/VSS for digital logic, enabling independent noise isolation and stable ADC reference performance.

Key Specifications

Pinout & Package

UPD78F0547AGC(S)-GAD-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 across eight bidirectional I/O ports (P0–P7), plus dedicated analog, power, reset, and clock pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0547AGC(S)-GAD-AX, R5F104PJAFB#30 offers superior energy efficiency but sacrifices analog noise immunity and Flash capacity, while UPD78F0537AGC(S)-GAD-AX provides identical peripheral compatibility at lower density-making it a true functional subset for cost-sensitive volume deployments.

Availability

UPD78F0547AGC(S)-GAD-AX is available at Aetrix Electronics and suitable for industrial HMI panels, PLC I/O modules, smart power meters, and building HVAC controllers requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0547AGC(S)-GAD-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 UPD78F0547AGC(S)-GAD-AX belongs to the 78K0/KF2 product line, designed specifically for cost-sensitive, high-reliability industrial control applications requiring deterministic real-time response, on-chip Flash upgradability, and robust analog integration.

FAQ

What is the maximum operating frequency of the UPD78F0547AGC(S)-GAD-AX?

The UPD78F0547AGC(S)-GAD-AX supports a maximum CPU clock frequency of 20 MHz, achievable using either the internal high-speed oscillator or an external crystal connected to X1/X2 pins. At this frequency, the instruction cycle time is 100 ns, enabling deterministic execution of time-critical control loops. The device maintains full functionality-including ADC sampling, UART transmission, and timer capture-across the entire 4.0 V to 5.5 V supply range at this speed.

Does the UPD78F0547AGC(S)-GAD-AX support in-application programming (IAP) of its Flash memory?

Yes, the UPD78F0547AGC(S)-GAD-AX supports in-application programming via Renesas' self-programming library v1.0. This library enables secure erasure and rewriting of Flash memory blocks-including the user program area-while the CPU continues executing foreground tasks. The UPD78F0547AGC(S)-GAD-AX achieves a minimum interrupt latency of 3.5 μs during Flash operations, ensuring real-time responsiveness is preserved during firmware updates.

What are the analog power supply requirements for the UPD78F0547AGC(S)-GAD-AX ADC subsystem?

The UPD78F0547AGC(S)-GAD-AX requires separate analog power connections: EVDD (analog VDD) and EVSS (analog VSS). These pins must be decoupled with 0.1 μF ceramic capacitors close to the package, and EVDD should be tied to the same 5 V rail as VDD but routed on an isolated copper pour. This dual-domain design isolates ADC reference noise from digital switching transients, enabling consistent 10-bit linearity (±2 LSB) across −40°C to +85°C.

How many UART interfaces does the UPD78F0547AGC(S)-GAD-AX integrate, and what are their key capabilities?

The UPD78F0547AGC(S)-GAD-AX integrates two independent UART interfaces: UART0 and UART1. UART0 supports full-duplex operation with RTS/CTS flow control on P00–P03; UART1 operates on P30–P31 and supports automatic baud rate detection. Both units feature programmable baud rates up to 1 Mbps, 8- or 9-bit data formats, parity options, and break detection-making the UPD78F0547AGC(S)-GAD-AX suitable for multi-protocol serial gateways in industrial networks.

Is the UPD78F0547AGC(S)-GAD-AX pin-compatible with other members of the 78K0/KF2 family?

Yes, the UPD78F0547AGC(S)-GAD-AX shares identical 64-pin LQFP packaging and pin assignments with all 78K0/KF2 variants, including UPD78F0544AGC(S)-GAD-AX, UPD78F0545AGC(S)-GAD-AX, and UPD78F0546AGC(S)-GAD-AX. This allows direct PCB reuse across designs differing only in Flash size (96 KB to 128 KB) and RAM allocation (6 KB to 8 KB), provided firmware fits within the target device's memory map and no variant-specific peripherals are invoked.