Renesas R4F20103DFA#U0

Overview

R4F20103DFA#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny family, designed for embedded control in resource-constrained industrial and consumer systems. It integrates 64 KB on-chip flash memory, 4 KB RAM, a 24 MHz max CPU clock, 32-pin LQFP package, and peripheral sets including UART, I²C, 16-bit timers, and 10-bit ADC. It targets real-time motor control and sensor interface applications requiring deterministic interrupt response and low-power operation.

For engineers reviewing the R4F20103DFA#U0 datasheet, R4F20103DFA#U0 pinout, R4F20103DFA#U0 application, or R4F20103DFA#U0 equivalent, key selection criteria include flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), watchdog timer with windowed mode, on-chip debug support via JTAG, and compliance with industrial temperature grade (−40°C to +85°C).

Technical Context

The R4F20103DFA#U0 implements the H8S/2000 CPU core with 24-bit address space, supporting advanced mode for extended register access and enhanced interrupt handling. It features a programmable clock pulse generator (CPG) enabling multiple clock sources - internal high-speed oscillator (HOC), external crystal (1–20 MHz), or PLL-derived clocks - with dynamic switching and power-down control registers (LPCR1–LPCR3) for low-power modes including HALT and STOP.

Peripheral integration includes a 10-bit successive-approximation ADC with 8 input channels and sample-and-hold, two 16-bit timer/counters with compare match and PWM output capability, three serial interfaces (SCI0/1/3 supporting asynchronous and clock-synchronous modes), and an I²C-compatible interface (IIC2) with master/slave operation and arbitration support.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R4F20103DFA#U0, R5F21203DFA#U0 offers scalable memory and hardware event chaining for complex automation logic, while HD64F20103FV trades programmability for cost and boot reliability in fixed-function systems.

Availability

R4F20103DFA#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UIs, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for R4F20103DFA#U0 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 H8S/Tiny series, including R4F20103DFA#U0, was engineered for cost-sensitive, real-time embedded control in appliances, industrial equipment, and sensor systems - emphasizing low power, integrated peripherals, and robust debug capability.

FAQ

What is the maximum operating frequency of the R4F20103DFA#U0?

The R4F20103DFA#U0 supports a maximum CPU clock frequency of 24 MHz. This is achieved using the on-chip PLL with an external crystal (e.g., 8 MHz) or internal high-speed oscillator. The actual system clock is configured via the SYSCCR register, and all peripherals operate synchronously with this clock unless individually gated. At 24 MHz, the R4F20103DFA#U0 delivers 16 MIPS performance with deterministic instruction timing.

Does the R4F20103DFA#U0 support in-system programming (ISP)?

Yes, the R4F20103DFA#U0 supports in-system programming via its on-chip flash memory and JTAG debug interface. Firmware updates can be performed in the target system using Renesas' Flash Development Toolkit (FDT) and compatible debuggers. The flash controller supports sector erase (1 KB minimum), byte/word programming, and built-in erase/program verify - enabling field upgrades without removing the R4F20103DFA#U0 from the PCB.

What ADC resolution and accuracy does the R4F20103DFA#U0 provide?

The R4F20103DFA#U0 integrates a 10-bit successive-approximation ADC with 8 input channels. Its typical integral nonlinearity (INL) is ±1 LSB and differential nonlinearity (DNL) is ±0.5 LSB over the full 2.7–5.5 V supply range. Conversion time is 1.2 µs per sample, and the ADC supports both software-triggered and timer-triggered sampling - making it suitable for precise analog monitoring in R4F20103DFA#U0-based sensor interfaces.

Can the R4F20103DFA#U0 operate from a single 3.3 V supply?

Yes, the R4F20103DFA#U0 operates across a wide supply range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. All I/O pins are 5 V tolerant when configured as inputs, and the internal voltage regulator maintains stable core voltage regardless of supply variation. This allows direct interfacing with 3.3 V logic families and compatibility with mixed-voltage designs without level shifters - a key feature of the R4F20103DFA#U0 in modern embedded systems.

Is there hardware support for PWM generation on the R4F20103DFA#U0?

Yes, the R4F20103DFA#U0 provides hardware PWM generation through its two 16-bit timer modules (TMR0 and TMR1). Each timer supports compare match output with programmable duty cycle and period, independent clock prescaling, and dead-time insertion for complementary outputs. These PWM channels drive motors, dim LEDs, or generate precise waveforms without CPU overhead - a core capability leveraged in R4F20103DFA#U0-based motor control implementations.