Renesas R4F20103RNFA#V0

Overview

R4F20103RNFA#V0 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, and peripheral functions including UART, SCI, I²C, 16-bit timers, and 10-bit ADC. It targets motor control, sensor interface, and appliance management applications.

For engineers reviewing the R4F20103RNFA#V0 datasheet, R4F20103RNFA#V0 pinout, R4F20103RNFA#V0 application, or R4F20103RNFA#V0 equivalent, key selection criteria include its 64-pin LQFP package, H8S/2000-compatible instruction set, 2.7–5.5 V operating voltage range, and support for low-power stop/wait modes - all critical for cost-sensitive, real-time control designs.

Technical Context

The R4F20103RNFA#V0 implements the H8S/2000 CPU core with 16-bit data bus and 24-bit address space, supporting both advanced and standard operating modes. It features a programmable clock pulse generator (CPG) with internal high-speed OCO (on-chip oscillator), enabling flexible clock source selection without external crystals in many configurations.

Peripheral integration includes a 10-bit, 8-channel ADC with sample-and-hold, three 16-bit timer/counters with compare-match and PWM output capability, and dual serial interfaces (SCI3 and IIC2) supporting asynchronous and synchronous communication. Interrupt handling is managed via a 10-level priority controller with vectorized exception processing.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, standard JEDEC footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20103RNFA#V0, R4F20203RNFA#V0 offers scalable memory for evolving firmware, while HD64F20103R trades reprogrammability for lower unit cost in static designs - both require identical PCB layout but differ in update capability and long-term maintenance.

Availability

R4F20103RNFA#V0 is available at Aetrix Electronics and suitable for industrial motor control, smart appliance interface, and factory automation sensor node applications requiring stable component supply and long-term lifecycle support.

Supply support for R4F20103RNFA#V0 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 H8S/Tiny series - including R4F20103RNFA#V0 - was designed for cost-effective, low-power embedded control in appliances, industrial equipment, and consumer electronics where code density, peripheral integration, and supply voltage flexibility are critical.

FAQ

What is the maximum operating frequency of the R4F20103RNFA#V0?

The R4F20103RNFA#V0 operates at a maximum CPU clock frequency of 24 MHz. This is achieved using either the internal high-speed on-chip oscillator (OCO) or an external crystal/clock source. At this frequency, the device delivers deterministic instruction execution with a 41.7 ns minimum cycle time, making it suitable for time-critical control loops in motor and sensor applications. The R4F20103RNFA#V0 maintains full functionality across its specified 2.7–5.5 V supply range at this speed.

Does the R4F20103RNFA#V0 support in-system programming (ISP)?

Yes, the R4F20103RNFA#V0 supports in-system programming via its on-chip flash memory. It includes a boot ROM with serial programming mode accessible through dedicated pins (e.g., RXD/TXD), allowing firmware updates without removing the device from the PCB. The R4F20103RNFA#V0's flash is rated for 10,000 write/erase cycles and retains data for 20 years at 85°C, enabling field upgrades and configuration changes during product deployment.

What peripheral interfaces are integrated into the R4F20103RNFA#V0?

The R4F20103RNFA#V0 integrates UART-compatible SCI3, I²C-compatible IIC2, three 16-bit general-purpose timers with PWM and input capture, a 10-bit 8-channel ADC, and a hardware watchdog timer. These peripherals are mapped to shared I/O pins via the Peripheral I/O Mapping Controller (PMC), allowing flexible pin assignment. No external transceivers or interface ICs are needed for basic serial communication or analog sensing - all required logic resides within the R4F20103RNFA#V0 die.

Is the R4F20103RNFA#V0 pin-compatible with other H8S/Tiny devices?

The R4F20103RNFA#V0 shares the same 64-pin LQFP package and pin assignment with other members of the H8S/201xxR group, including R4F20115RNFA#V0. However, pin compatibility does not extend to higher-memory variants like R4F20203RNFA#V0, which adds dedicated pins for extra peripherals. For drop-in replacement within the 201xxR subgroup, firmware and hardware remain interchangeable; cross-group substitution requires validation of peripheral register maps and memory layout.

What power management features does the R4F20103RNFA#V0 offer?

The R4F20103RNFA#V0 provides three low-power modes: wait mode (CPU halted, peripherals active), stop mode (CPU and most peripherals halted, RAM retained), and very-low-power stop mode (only real-time clock and wakeup logic active). Entry and exit are controlled via dedicated system control registers (LPCR1–LPCR3). These modes reduce current consumption to as low as 0.5 µA in deep stop, enabling battery-powered operation for months in sensor-monitoring applications - a key design advantage of the R4F20103RNFA#V0 in energy-conscious systems.