Renesas R4F20203RNFD#V0

Overview

R4F20203RNFD#V0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control applications requiring deterministic real-time response, integrated peripherals, and low-power operation. It features 128 KB on-chip Flash memory, 8 KB RAM, a 32 MHz max CPU clock, and supports 5 V operation with industrial temperature range (−40°C to +85°C). It is used in motor control modules, industrial I/O units, and sensor interface subsystems.

For engineers reviewing the R4F20203RNFD#V0 datasheet, R4F20203RNFD#V0 pinout, R4F20203RNFD#V0 application, or R4F20203RNFD#V0 equivalent, key selection criteria include Flash/RAM size, peripheral set (SCI, I²C, PWM, WDT), power supply voltage tolerance, and package compatibility with legacy H8S/20203R designs.

Technical Context

The R4F20203RNFD#V0 implements the H8S/2000 CPU core with 16-bit data bus and 24-bit address space, supporting advanced mode for extended addressing and enhanced interrupt handling. It integrates a Clock Pulse Generator (CPG) with internal high-speed OCO, programmable PLL, and multiple power-down modes including HALT and STOP.

Peripheral integration includes three serial communication interfaces (SCI0–SCI2), two I²C buses (IIC0, IIC2), a 16-bit timer/counters with compare-match and input-capture capability, 10-bit ADC with 8 channels, and 48 general-purpose I/O pins with configurable pull-up and noise filtering. All peripherals are memory-mapped and accessible via SFRs.

Key Specifications

Pinout & Package

R4F20203RNFD#V0 is housed in a 100-pin LQFP (14 mm × 14 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments follow the H8S/20203R pin-compatible layout per Renesas Hardware User's Manual Rev.3.00.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20203RNFD#V0, R4F20223RNFD#V0 offers scalable memory headroom while preserving design reuse, whereas R4F20103RNFD#V0 provides a leaner entry point with verified peripheral feature parity but reduced resource budget.

Availability

R4F20203RNFD#V0 is available at Aetrix Electronics and suitable for industrial motor control, building automation sensor hubs, and PLC I/O modules requiring stable component supply across multi-year production cycles.

Supply support for R4F20203RNFD#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 global semiconductor leader specializing in microcontrollers, analog, and power solutions for industrial, automotive, and infrastructure markets.

The H8S/Tiny series-including R4F20203RNFD#V0-is engineered for cost-effective, high-reliability embedded control in industrial equipment where deterministic timing, peripheral integration, and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the R4F20203RNFD#V0?

The R4F20203RNFD#V0 supports a maximum CPU clock frequency of 32 MHz, achievable via its internal PLL using an external 4 MHz crystal or oscillator input. This frequency is guaranteed across the full industrial temperature range (−40°C to +85°C) and 4.5 V to 5.5 V supply voltage. The R4F20203RNFD#V0's CPG module allows dynamic clock switching between internal OCO, crystal, and PLL sources without system interruption.

Does the R4F20203RNFD#V0 support in-system programming (ISP)?

Yes, the R4F20203RNFD#V0 supports in-system programming via its on-chip Flash memory, enabling firmware updates through the built-in SCI interface or background debugger (BDM) port. The 128 KB Flash is organized into 1 KB sectors with individual erase capability, allowing partial reprogramming without full chip erase. The R4F20203RNFD#V0 includes Flash protection registers to prevent unauthorized write/erase operations during normal operation.

What peripheral interfaces are integrated into the R4F20203RNFD#V0?

The R4F20203RNFD#V0 integrates three serial communication interfaces (SCI0–SCI2), two I²C buses (IIC0 and IIC2), a 16-bit timer unit with six channels, a 10-bit 8-channel ADC, a watchdog timer (WDT), low-voltage detection (LVD), and a data transfer controller (DTC). These peripherals are fully memory-mapped and accessible via special function registers (SFRs), with hardware event linking (ELC) enabling direct peripheral-to-peripheral triggering without CPU involvement. The R4F20203RNFD#V0 does not include CAN or USB controllers.

Is the R4F20203RNFD#V0 pin-compatible with other H8S/202xxR devices?

Yes, the R4F20203RNFD#V0 is pin-compatible with the R4F20223RNFD#V0 and R4F20235RNFD#V0 in the same 100-pin LQFP package, sharing identical pin functions for power, reset, clock, and all I/O ports. Peripheral mapping (e.g., SCI, I²C, PWM) follows the same assignment across these variants, enabling drop-in replacement where memory or ADC channel count differences are acceptable. The R4F20203RNFD#V0 pinout is documented in Section 1.4 of the Renesas H8S/20203R Hardware User's Manual Rev.3.00.

What development tools are supported for the R4F20203RNFD#V0?

Renesas provides full toolchain support for the R4F20203RNFD#V0, including the High-performance Embedded Workshop (HEW) IDE, C compiler (H8S/2000 C/C++ Compiler), and E8/E8a in-circuit emulators. The R4F20203RNFD#V0 is also compatible with modern Eclipse-based CS+ (CubeSuite+) IDE and Renesas Flash Programmer for programming. Evaluation boards such as the YRDKFX20203R reference kit include schematics, BOM, and sample firmware specifically validated for the R4F20203RNFD#V0.