Renesas R4F20203RNFD#H0

Overview

R4F20203RNFD#H0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control in industrial and consumer systems. It integrates 128 KB flash memory, 8 KB RAM, a 32-bit timer/counter with compare match function, 10-bit ADC with 8 channels, and supports up to 20 MHz CPU clock frequency. It operates across −40°C to +85°C and targets real-time motor control and sensor interface applications.

For engineers reviewing the R4F20203RNFD#H0 datasheet, R4F20203RNFD#H0 pinout, R4F20203RNFD#H0 application, or R4F20203RNFD#H0 equivalent, key selection criteria include its 100-pin LQFP package, on-chip debug support via JTAG, integrated low-voltage detection (LVD), and compatibility with H8S/20203R hardware reference designs.

Technical Context

The R4F20203RNFD#H0 implements the H8S/2000 CPU core with 32-bit internal data paths and 24-bit address space, supporting both advanced and standard operating modes. It includes a programmable clock pulse generator (CPG) with PLL, multiple serial interfaces (SCI3, IIC2, SSU), and an event link controller (ELC) for deterministic peripheral triggering.

Its interrupt system features 128 vector sources, priority-based nesting, and noise-canceling capability on external IRQ pins. The device uses a unified memory map with separate instruction and data buses, enabling efficient execution of real-time control firmware without bus contention.

Key Specifications

Pinout & Package

R4F20203RNFD#H0 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 hardware specification, supporting full I/O multiplexing and dedicated debug signals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20223RNFD#H0 and R4F20103RNFD#H0, the R4F20203RNFD#H0 delivers balanced memory (128 KB flash/8 KB RAM), full-speed 20 MHz operation, and identical peripheral integration-making it the optimal fit for mid-tier industrial control where CAN is not required but deterministic real-time response is critical.

Availability

R4F20203RNFD#H0 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UIs, and PLC I/O modules requiring stable component supply over extended production lifecycles.

Supply support for R4F20203RNFD#H0 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 IoT markets.

The H8S/Tiny series-including R4F20203RNFD#H0-is engineered for cost-effective, deterministic real-time control in resource-constrained embedded systems, emphasizing low-power operation, robust peripheral integration, and long-term industrial availability.

FAQ

What is the maximum operating frequency of the R4F20203RNFD#H0?

The R4F20203RNFD#H0 supports a maximum CPU clock frequency of 20 MHz. This is achieved using the on-chip high-speed oscillator (OCO) or an external crystal up to 20 MHz, with PLL multiplication enabled via the System Clock Control Register (SYSCCR). The 20 MHz rating is guaranteed across the full −40°C to +85°C temperature range and 2.7–5.5 V supply voltage.

Does the R4F20203RNFD#H0 include a hardware debug interface?

Yes, the R4F20203RNFD#H0 integrates a full IEEE 1149.1-compliant JTAG interface with TDI, TDO, TCK, and TMS pins. It supports real-time debugging, breakpoint setting, register inspection, and flash programming without requiring external debug probes-enabling rapid firmware development and field updates directly through the R4F20203RNFD#H0's dedicated debug pins.

How much on-chip memory does the R4F20203RNFD#H0 provide?

The R4F20203RNFD#H0 includes 128 KB of on-chip flash memory for program storage and 8 KB of on-chip SRAM for data and stack operations. Both memory blocks are accessed without wait states at maximum CPU speed, and the flash supports 100,000 erase/write cycles with guaranteed 10-year data retention at 85°C-meeting industrial reliability requirements for the R4F20203RNFD#H0.

Is the R4F20203RNFD#H0 pin-compatible with other H8S/Tiny devices?

The R4F20203RNFD#H0 shares the same 100-pin LQFP package and pin assignment with R4F20103RNFD#H0 and R4F20223RNFD#H0, enabling PCB layout reuse across this family. However, functional differences exist: R4F20103RNFD#H0 lacks some peripheral registers and has reduced memory, while R4F20223RNFD#H0 adds CAN functionality. Full pin compatibility is confirmed only within the H8S/20203R group per Renesas Hardware Manual Rev.3.00.

What peripheral interfaces are integrated into the R4F20203RNFD#H0?

The R4F20203RNFD#H0 integrates SCI3 (asynchronous serial), IIC2 (two-wire interface), SSU (synchronous serial), a 32-bit timer/counter with compare match, a 10-bit 8-channel ADC, watchdog timer, low-voltage detection, and event link controller (ELC). These peripherals are mapped via the Peripheral I/O Mapping Controller (PMC), allowing flexible pin assignment without hardware changes-key for scalable design using the R4F20203RNFD#H0.