Renesas R4F20223DFD#U0

Overview

R4F20223DFD#U0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control applications requiring integrated peripherals, low power consumption, and deterministic real-time operation. It features 128 KB on-chip flash memory, 8 KB RAM, a 20 MHz max CPU clock, 57 I/O pins, and integrated modules including UART, SCI, I²C, PWM timers, and watchdog timer.

For engineers reviewing the R4F20223DFD#U0 datasheet, R4F20223DFD#U0 pinout, R4F20223DFD#U0 application, or R4F20223DFD#U0 equivalent, key selection criteria include flash endurance (10⁴ 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 R4F20223DFD#U0 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 selectable internal oscillator (1 MHz) and external crystal input (up to 20 MHz), plus a bus controller (BSC) managing memory-mapped peripheral access and wait-state insertion.

Peripheral integration includes three serial interfaces (SCI3, IIC2, SSU), a 16-bit data transfer controller (DTC), event link controller (ELC) for hardware-triggered transfers, and low-voltage detection (LVD) circuitry with programmable trip points. All peripherals are memory-mapped into the SFR space and accessible via standard load/store instructions.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (12 mm × 12 mm, 0.5 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 R4F20223DFD#U0, R4F20215DFD#U0 reduces memory and I/O count for cost optimization, while R4F20235DFD#U0 adds CAN and doubles memory - both share identical clocking, debug, and low-power architecture, enabling scalable platform design.

Availability

R4F20223DFD#U0 is available at Aetrix Electronics and suitable for industrial motor control, building automation sensor nodes, medical diagnostic equipment, and factory floor PLC I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for R4F20223DFD#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 R4F20223DFD#U0 - was designed for cost-effective, deterministic real-time control in resource-constrained embedded systems where reliability, low power, and peripheral integration outweigh raw processing throughput.

FAQ

What is the maximum operating frequency of the R4F20223DFD#U0?

The R4F20223DFD#U0 supports a maximum CPU clock frequency of 20 MHz when using an external crystal oscillator up to 20 MHz or the internal PLL configuration. The actual achievable frequency depends on supply voltage and ambient temperature - at 2.7 V and −40°C, the guaranteed max is 16 MHz per Renesas Electrical Characteristics specifications. The R4F20223DFD#U0 must be configured via SYSCCR register settings to select the appropriate clock source and prescaler values.

Does the R4F20223DFD#U0 include a hardware debug interface?

Yes, the R4F20223DFD#U0 integrates a full-featured on-chip debug (OCD) module compliant with Renesas E1 and E20 emulator platforms. This interface supports real-time memory and register access, hardware breakpoints, instruction trace, and flash programming - all accessible through the dedicated TCK/TDI/TDO/TMS pins. The R4F20223DFD#U0 does not require external debug probes beyond standard JTAG cabling, and its OCD operates independently of application code execution.

What are the supported low-power modes for the R4F20223DFD#U0?

The R4F20223DFD#U0 provides four low-power modes: HALT (CPU stopped, peripherals active), STOP (CPU and most peripherals halted, RTC and LVD active), SNOOZE (selected peripherals run at reduced clock, CPU halted), and DEEP STOP (minimal current draw with wake-on-reset only). Each mode is entered via specific register writes to LPCR1/LPCR2, and wake sources include external interrupts, RTC alarm, and LVD threshold crossing. The R4F20223DFD#U0 achieves typical STOP-mode current of 2.5 µA at 3.3 V and 25°C.

Can the R4F20223DFD#U0 operate from a 3.3 V supply?

Yes, the R4F20223DFD#U0 operates across a supply voltage range of 2.7 V to 5.5 V, making it fully compatible with standard 3.3 V systems. At 3.3 V, it supports up to 16 MHz CPU operation and maintains full I/O drive strength (20 mA sink/source per pin). Internal regulators and LVD circuitry are calibrated for this range, and all specified timing parameters - including flash read/write cycles and ADC conversion - remain valid at 3.3 V. The R4F20223DFD#U0 requires no external level-shifting when interfacing with 3.3 V peripherals.

How many serial communication interfaces does the R4F20223DFD#U0 integrate?

The R4F20223DFD#U0 integrates three independent serial interfaces: SCI3 (asynchronous UART with LIN support), IIC2 (two-wire I²C master/slave), and SSU (synchronous serial unit supporting SPI and TI formats). Each has dedicated registers, independent baud rate generators, and configurable data formats. These interfaces share no common hardware resources - enabling simultaneous operation, such as I²C sensor polling while transmitting telemetry via SCI3 and driving an SPI display via SSU. The R4F20223DFD#U0 assigns each to non-overlapping memory-mapped addresses for deterministic access.