Renesas R4F20203RDFD#V0

Overview

R4F20203RDFD#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 128 KB on-chip flash memory, 8 KB RAM, a 32-bit timer with compare match functionality, 10-bit ADC with 8 channels, and supports up to 48 MHz CPU operation via internal high-speed OCO clock source. It is commonly deployed in motor control modules and sensor interface units requiring deterministic real-time response.

For engineers reviewing the R4F20203RDFD#V0 datasheet, R4F20203RDFD#V0 pinout, R4F20203RDFD#V0 application, or R4F20203RDFD#V0 equivalent, key selection considerations include its 100-pin LQFP package, H8S/2000-compatible instruction set, integrated low-voltage detection (LVD), and support for both external crystal and internal oscillator clock sources without external components.

Technical Context

The R4F20203RDFD#V0 implements the H8S/2000 CPU core with 32-bit internal data paths and 24-bit address space, enabling direct access to full 128 KB flash and 8 KB RAM. Its peripheral set includes three serial communication interfaces (SCI), two I²C buses, and a synchronous serial unit (SSU) supporting SPI-like protocols.

Power management is handled by the Clock Pulse Generator (CPG) with multiple clock sources - including high-speed on-chip oscillator (OCO), external crystal/resonator, and sub-clock - and three power-down modes (HALT, STOP, and SLEEP) controlled via LPCR1–LPCR3 registers. The watchdog timer (WDT) and low-voltage detection (LVD) circuits provide hardware-level system supervision.

Key Specifications

Pinout & Package

Package: 100-pin LQFP (14 mm × 14 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 microcontroller applications.

Compared with R4F20203RDFD#V0, R4F20223RDFD#V0 offers scalable memory and redundancy for future-proofing, while R4F20103RDFD#V0 provides a lower-cost entry point with identical footprint and toolchain compatibility - enabling design reuse across product tiers without PCB revision.

Availability

R4F20203RDFD#V0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, home appliance UIs, and legacy industrial I/O modules requiring stable component supply and long-term manufacturing continuity.

Supply support for R4F20203RDFD#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 R4F20203RDFD#V0 - was engineered for deterministic real-time control in cost-sensitive embedded systems where code density, low-power operation, and peripheral integration outweigh raw processing throughput.

FAQ

What is the maximum operating frequency of the R4F20203RDFD#V0?

The R4F20203RDFD#V0 supports a maximum CPU operating frequency of 48 MHz when using the internal high-speed on-chip oscillator (OCO). This frequency is achievable across the full 2.7 V to 5.5 V supply range and specified temperature range (−40°C to +85°C). External clock sources up to 20 MHz are also supported via XTAL/EXTAL pins, with PLL multiplication available in select variants - though the R4F20203RDFD#V0 does not include an on-chip PLL.

Does the R4F20203RDFD#V0 support in-system programming (ISP)?

Yes, the R4F20203RDFD#V0 supports in-system programming via its on-chip flash memory. Firmware updates can be performed through the built-in SCI interface using Renesas' Flash Development Toolkit (FDT) or custom bootloader implementations. The 128 KB flash is organized into 1 KB sectors, allowing partial reprogramming without erasing the entire memory - critical for field-upgradable industrial controllers where R4F20203RDFD#V0 serves as the primary firmware host.

What debug interface does the R4F20203RDFD#V0 provide?

The R4F20203RDFD#V0 features a single-wire debug (SWD) interface compliant with Renesas' Full-Debug specification. This allows real-time debugging, breakpoint setting, register inspection, and memory read/write operations without requiring a full JTAG connector. The SWD interface shares pins with the reset and one I/O line, minimizing board footprint while retaining full visibility into R4F20203RDFD#V0 execution state during development and validation.

Is the R4F20203RDFD#V0 pin-compatible with other H8S/2000 series MCUs?

Yes, the R4F20203RDFD#V0 is pin-compatible with other members of the H8S/20x03R group in the same 100-pin LQFP package, including R4F20103RDFD#V0 and R4F20223RDFD#V0. Pin assignments for power, reset, clocks, and all peripheral I/O are identical across these variants. This enables hardware reuse across product families - for example, upgrading from R4F20103RDFD#V0 to R4F20203RDFD#V0 requires only firmware update, not PCB redesign.

What is the role of the Event Link Controller (ELC) in the R4F20203RDFD#V0?

The Event Link Controller (ELC) in the R4F20203RDFD#V0 enables hardware-level synchronization between peripherals without CPU involvement. For instance, an ADC conversion completion event can directly trigger a timer capture or initiate a DTC transfer - reducing interrupt latency and freeing the CPU for higher-level tasks. This feature is especially valuable in time-critical applications such as motor commutation or synchronized sensor sampling, where deterministic timing is enforced by R4F20203RDFD#V0's ELC rather than software polling or interrupt service routines.