Renesas UPD78F0500MC-5A4-A

Overview

UPD78F0500MC-5A4-A from Renesas Electronics is an 8-bit single-chip microcontroller in the 78K0/Kx2 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 using an external crystal (1–20 MHz) or internal high-speed oscillator (8 MHz), supports 5V operation, and integrates UART, I²C, and 10-bit ADC with 16 channels. It is used in industrial control panels requiring deterministic real-time response and firmware-upgradable logic.

For engineers reviewing the UPD78F0500MC-5A4-A datasheet, UPD78F0500MC-5A4-A pinout, UPD78F0500MC-5A4-A application, or UPD78F0500MC-5A4-A equivalent, key selection criteria include Flash endurance (100,000 write/erase cycles), ADC conversion time (1.2 μs typical), interrupt latency (3–5 cycles), and support for in-application programming via on-chip self-programming library.

Technical Context

The UPD78F0500MC-5A4-A implements the 78K0 CPU core with 16-bit ALU, 16-level hardware stack, and instruction set compatible with earlier 78K/0 devices. It uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access.

Its peripheral set includes three 16-bit timers (T0–T2), one watchdog timer, serial interface (UART/I²C), 10-bit ADC with sample-and-hold, and 8-channel D/A converter. Clock generation supports main system clock (X1 input), sub-clock (32.768 kHz), and internal RC oscillators - all configurable via system control registers.

Key Specifications

Pinout & Package

UPD78F0500MC-5A4-A is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions are defined per Renesas Hardware User's Manual Rev.4.01, Section 2.1.1 (78K0/KB2).

Key Features

Applications

Equivalent & Alternatives

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

Compared with UPD78F0500MC-5A4-A, R5F100LEAFB#30 offers superior low-power performance and automotive qualification but sacrifices 5 V I/O tolerance and ADC channel density; STM8S207R8T6 provides CAN capability and higher clock rate but requires external level-shifting for 5 V peripherals and lacks integrated I²C.

Availability

UPD78F0500MC-5A4-A is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and home appliance control boards requiring stable component supply across multi-year production cycles.

Supply support for UPD78F0500MC-5A4-A 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, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The UPD78F0500MC-5A4-A belongs to the 78K0/Kx2 product line, designed specifically for cost-sensitive, high-reliability industrial control applications where 5 V operation, Flash endurance, and deterministic real-time response are critical.

FAQ

What is the maximum operating frequency of the UPD78F0500MC-5A4-A?

The UPD78F0500MC-5A4-A supports a maximum operating frequency of 20 MHz when driven by an external crystal oscillator connected to the X1/X2 pins. This allows a minimum instruction cycle time of 100 ns. The device also supports internal high-speed RC oscillation at 8 MHz, which is factory-trimmed to ±1% accuracy and usable for less timing-critical applications without external components.

Does the UPD78F0500MC-5A4-A include hardware support for in-system programming?

Yes, the UPD78F0500MC-5A4-A includes on-chip self-programming capability via a ROM-resident library. This enables in-application programming (IAP) of Flash memory without requiring an external programmer. The library supports sector erase, byte/word programming, and verification - essential for field firmware updates and parameter storage in industrial equipment.

What ADC performance specifications does the UPD78F0500MC-5A4-A provide?

The UPD78F0500MC-5A4-A integrates a 10-bit successive-approximation ADC with 16 selectable input channels. Its typical conversion time is 1.2 μs, and it supports programmable sampling time, trigger sources (software/timer/external), and result alignment (left/right justified). The ADC operates across the full 4.5–5.5 V supply range with ±2 LSB integral nonlinearity and monotonicity guaranteed.

Is the UPD78F0500MC-5A4-A pin-compatible with other members of the 78K0/Kx2 family?

No, the UPD78F0500MC-5A4-A is not universally pin-compatible across the 78K0/Kx2 family. While it shares the same 100-pin LQFP package with several variants (e.g., UPD78F0501MC-5A4-A), pin functions differ significantly between sub-families (KB2 vs KC2 vs KD2). For example, ADC channel mapping, timer output pins, and serial interface locations vary - requiring schematic and layout review before substitution.

What debug interface does the UPD78F0500MC-5A4-A support?

The UPD78F0500MC-5A4-A supports single-wire debug (SWD) via the P130 pin, compatible with Renesas E1/E20 emulators and third-party tools using the standard SWD protocol. This interface provides full read/write access to memory, registers, and peripherals during development, including breakpoint setting, step execution, and real-time variable inspection - without consuming additional I/O pins.