Renesas R4F20203NFD#20

Overview

R4F20203NFD#20 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny family, designed for embedded control applications requiring integrated peripherals, low-power operation, and deterministic real-time response. It features 128 KB on-chip Flash memory, 8 KB RAM, a 32 MHz max CPU clock, 57 I/O pins, and integrated peripherals including UART, SCI, I²C, PWM timers, and watchdog timer.

For engineers reviewing the R4F20203NFD#20 datasheet, R4F20203NFD#20 pinout, R4F20203NFD#20 application, or R4F20203NFD#20 equivalent, key selection criteria include Flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), industrial temperature grade (−40°C to +85°C), and support for in-circuit debugging via on-chip debug interface.

Technical Context

The R4F20203NFD#20 implements the H8S/2000 CPU core with 24-bit address space, supporting both advanced and standard operating modes. Its system architecture integrates a clock pulse generator (CPG) with internal oscillator, PLL, and multiple clock sources-including external crystal (1–20 MHz) and ceramic resonator-enabling flexible power/performance trade-offs.

Peripheral integration includes a 16-bit data transfer controller (DTC), event link controller (ELC), low-voltage detection (LVD), and serial interfaces (SCI3, IIC2, SSU). Memory protection is enforced via peripheral I/O mapping controller (PMC) and bus controller (BSC), ensuring secure register access and memory-mapped peripheral isolation.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 mm × 14 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20223NFD#20 and R4F20103NFD#20, the R4F20203NFD#20 offers balanced Flash/RAM capacity and full peripheral set (SCI3 + IIC2) in the 80-pin LQFP footprint - making it optimal for mid-tier industrial controllers where CAN is unnecessary but dual serial interfaces are essential.

Availability

R4F20203NFD#20 is available at Aetrix Electronics and suitable for industrial motor control, building automation, factory HMI, and medical diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for R4F20203NFD#20 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 automotive, industrial, and enterprise applications.

The H8S/Tiny series - including the R4F20203NFD#20 - was engineered for cost-effective, high-reliability embedded control in resource-constrained industrial environments, emphasizing low-power operation, robust peripheral integration, and long-lifecycle support.

FAQ

What is the maximum operating frequency of the R4F20203NFD#20?

The R4F20203NFD#20 supports a maximum CPU clock frequency of 32 MHz, achievable via its integrated PLL when driven by an external 4 MHz crystal or resonator. This frequency is fully supported across the full operating voltage range (2.7–5.5 V) and temperature range (−40°C to +85°C), with timing margins verified per Renesas' published electrical characteristics table in the Hardware User's Manual Rev. 3.00.

Does the R4F20203NFD#20 include a hardware debug interface?

Yes, the R4F20203NFD#20 integrates an on-chip debug (OCD) module compliant with Renesas' standard debug protocol. It supports breakpoints, watchpoints, real-time trace, and memory/register access via dedicated OCD pins (OCDCLK, OCDTMS, OCDTDI, OCDTDO), enabling full in-circuit debugging without requiring external JTAG adapters beyond standard Renesas E1/E20 emulators.

What serial communication interfaces are available on the R4F20203NFD#20?

The R4F20203NFD#20 provides three serial interfaces: SCI3 (full-duplex UART with baud rate generator), IIC2 (two-wire Inter-IC Bus supporting master/slave modes up to 400 kHz), and SSU (synchronous serial unit configurable for SPI or I²S). No CAN or USB interface is integrated - those require external transceivers or companion ICs.

Is the R4F20203NFD#20 pin-compatible with other H8S/20xx devices?

The R4F20203NFD#20 shares the same 80-pin LQFP package and pin assignment with R4F20103NFD#20 and R4F20223NFD#20, enabling PCB layout reuse across this family. However, functional differences exist - for example, R4F20103NFD#20 lacks SCI3 and IIC2 signals on shared pins, so firmware and peripheral initialization must be validated per device.

What is the Flash memory endurance specification for the R4F20203NFD#20?

The on-chip Flash memory in the R4F20203NFD#20 is rated for 10,000 write/erase cycles per block, with 128-byte erase granularity. This specification is guaranteed under standard operating conditions (VCC = 5.0 V ±10%, TA = 25°C) and applies to all 128 KB of program memory - no wear-leveling firmware is required for typical field update intervals exceeding 5 years.