Renesas R4F20203DFD#U0

Overview

R4F20203DFD#U0 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 20 MHz max CPU clock, 57 I/O pins, and supports CAN 2.0B interface via dedicated controller.

For engineers reviewing the R4F20203DFD#U0 datasheet, R4F20203DFD#U0 pinout, R4F20203DFD#U0 application, or R4F20203DFD#U0 equivalent, key selection criteria include its H8S/20203 core architecture, 100-pin LQFP package with defined peripheral mapping, CAN-capable system integration, and qualification for industrial temperature range (−40°C to +85°C) operation.

Technical Context

The R4F20203DFD#U0 implements the H8S/2000 CPU core with 24-bit address space, supporting advanced mode for extended register access and enhanced interrupt handling. It integrates a programmable 8-channel 16-bit timer, 10-bit ADC with 16 input channels, and dual serial interfaces (SCI and I²C) alongside the CAN 2.0B controller with message object buffers and automatic retransmission.

Its clock system includes an on-chip oscillator, PLL circuit for internal clock multiplication, and multiple power-down modes controlled by LPCR registers. The device uses a unified memory map with separate SFR regions and supports vectored interrupts with priority levels configurable per source via IPRA–IPRI registers.

Key Specifications

Pinout & Package

The R4F20203DFD#U0 is housed in a 100-pin LQFP package with exposed thermal pad, optimized for thermal dissipation and PCB routing density in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20203DFD#U0, R4F20223DFD#U0 offers scalable memory and timing resources within identical mechanical and electrical compatibility, while R5F212A6SDFP#V0 trades CAN for LIN and lower active power at the cost of architectural divergence and firmware porting effort.

Availability

R4F20203DFD#U0 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, factory floor I/O modules, and medical diagnostic equipment interfaces requiring stable component supply over extended production lifecycles.

Supply support for R4F20203DFD#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 manufacturer specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The H8S/Tiny series, including R4F20203DFD#U0, was engineered for cost-sensitive industrial control applications demanding real-time determinism, integrated CAN, and long-term supply stability without sacrificing peripheral richness.

FAQ

What is the maximum operating frequency of the R4F20203DFD#U0?

The R4F20203DFD#U0 operates at a maximum CPU clock frequency of 20 MHz, achieved via internal PLL multiplication of an external crystal or oscillator input. This frequency enables consistent instruction execution timing and supports real-time control loops with predictable latency. The R4F20203DFD#U0 maintains full peripheral functionality-including CAN, ADC, and timers-at this speed, as verified in Renesas' Hardware User's Manual Rev. 3.00.

Does the R4F20203DFD#U0 include a CAN controller?

Yes, the R4F20203DFD#U0 integrates a full CAN 2.0B-compliant controller with 16 message object buffers, automatic ID filtering, and bus-off recovery logic. It requires only an external CAN transceiver (e.g., TJA1040) for physical layer compliance. This capability is documented in Section 1.1.2 and Chapter 13 of the H8S/20103–20235 Hardware User's Manual, confirming native support without external co-processors.

What package type is used for the R4F20203DFD#U0?

The R4F20203DFD#U0 is supplied in a 100-pin LQFP package measuring 14 mm × 14 mm with 0.5 mm lead pitch and an exposed thermal pad. Pin assignments and mechanical dimensions are specified in Section 1.4 of the official Renesas Hardware User's Manual. This package supports standard reflow soldering profiles and provides adequate thermal performance for industrial ambient conditions up to +85°C.

How much on-chip memory does the R4F20203DFD#U0 have?

The R4F20203DFD#U0 contains 128 KB of on-chip flash memory for program storage and 8 KB of RAM for data and stack operations. Both memory blocks are accessible via the H8S/2000 unified address space and support in-system programming. These values are explicitly listed in Table 1.1 (List of Products) and confirmed in memory map diagrams throughout the Renesas Hardware User's Manual.

Is the R4F20203DFD#U0 qualified for industrial temperature operation?

Yes, the R4F20203DFD#U0 is rated for operation across the industrial temperature range of −40°C to +85°C. This qualification is stated in the device's ordering information section and supported by electrical characteristics tables in the Hardware User's Manual, which specify parameter limits under these ambient conditions. No derating or special thermal design is required for compliant use within this range.