Renesas R4F20202DFD#20

Overview

R4F20202DFD#20 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 operation, and deterministic real-time response. It features 64 KB on-chip Flash memory, 4 KB RAM, a 20 MHz max CPU clock, 57 I/O pins, and integrated peripherals including UART, SCI, I²C, PWM timers, and watchdog timer.

For engineers reviewing the R4F20202DFD#20 datasheet, R4F20202DFD#20 pinout, R4F20202DFD#20 application, or R4F20202DFD#20 equivalent, key selection criteria include Flash endurance (100K 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 R4F20202DFD#20 implements the H8S/2000 CPU core with 16-bit data bus and 24-bit address space, supporting advanced mode for enhanced instruction set compatibility. It integrates a Clock Pulse Generator (CPG) with internal oscillator, PLL, and multiple clock sources enabling flexible power/performance trade-offs.

Peripheral subsystems include a Data Transfer Controller (DTC) for autonomous memory-to-peripheral transfers, Event Link Controller (ELC) for hardware-triggered interrupt chaining, and Low-Voltage Detection (LVD) circuitry with programmable trip points-enabling robust operation in fluctuating supply environments without external supervision.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20203DFD#20 and R5F565NEADFP, the R4F20202DFD#20 delivers optimized resource allocation for cost-sensitive industrial controls where deterministic 16-bit performance, compact footprint, and proven qualification outweigh raw compute throughput or peripheral expansion.

Availability

R4F20202DFD#20 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, building automation panels, and medical diagnostic equipment requiring stable component supply across long production lifecycles.

Supply support for R4F20202DFD#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 IoT markets.

The H8S/Tiny series-including the R4F20202DFD#20-is engineered for cost-effective, high-reliability embedded control in resource-constrained industrial and consumer systems where longevity, low power, and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the R4F20202DFD#20?

The R4F20202DFD#20 operates at a maximum CPU clock frequency of 20 MHz, delivering deterministic real-time performance with instruction cycle times as low as 50 ns. This frequency is achievable using the on-chip PLL with external crystal (1–8 MHz) or external clock input. The R4F20202DFD#20 maintains full functionality across its specified voltage range (2.7–5.5 V) and temperature range (−40°C to +85°C).

Does the R4F20202DFD#20 support in-circuit debugging?

Yes, the R4F20202DFD#20 includes an on-chip background debugger (BDM) interface supporting single-wire real-time debugging, breakpoint setting, and memory inspection without halting peripheral operation. This capability enables non-intrusive development and validation of time-critical firmware. The R4F20202DFD#20 does not require external JTAG hardware, reducing debug infrastructure cost.

What are the low-power modes supported by the R4F20202DFD#20?

The R4F20202DFD#20 supports four low-power modes: HALT (CPU stopped, peripherals active), STOP (all clocks halted, RAM retained), WAIT (main clock stopped, peripheral clocks active), and SNOOZE (selected peripherals operate under reduced clock). In STOP mode, current consumption drops below 1 μA, making the R4F20202DFD#20 suitable for battery-powered applications requiring multi-year operation.

Is the R4F20202DFD#20 qualified for industrial temperature operation?

Yes, the R4F20202DFD#20 is rated for industrial temperature operation from −40°C to +85°C and is classified as a "Standard" quality grade device per Renesas documentation. It is intended for use in computers, office equipment, industrial robots, and test/measurement systems. The R4F20202DFD#20 undergoes screening and characterization across this full range, ensuring reliable startup and operation under thermal stress.

How much on-chip memory does the R4F20202DFD#20 include?

The R4F20202DFD#20 integrates 64 KB of on-chip Flash memory (rated for 100,000 write/erase cycles) and 4 KB of RAM. The Flash supports in-application programming (IAP), enabling field firmware updates without external programmers. The R4F20202DFD#20 also includes dedicated boot ROM with factory-programmed bootloader, simplifying secure firmware deployment workflows.