Renesas R4F20102RDFA#V0

Overview

R4F20102RDFA#V0 from Renesas Electronics is a 16-bit single-chip microcontroller in the H8S/Tiny series, designed for embedded control in resource-constrained industrial and consumer systems. It integrates 64 KB on-chip flash memory, 4 KB RAM, a 24 MHz max CPU clock, and peripheral modules including UART, I²C, 16-bit timers, and 10-bit ADC - enabling compact motor control and sensor interface applications.

For engineers reviewing the R4F20102RDFA#V0 datasheet, R4F20102RDFA#V0 pinout, R4F20102RDFA#V0 application, or R4F20102RDFA#V0 equivalent, key selection criteria include flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), and support for low-power stop modes with wake-up via external interrupt or timer match - critical for battery-powered edge nodes and appliance control units.

Technical Context

The R4F20102RDFA#V0 implements the H8S/2000 CPU core with 24-bit address space, supporting both advanced and normal operating modes. Its system architecture includes an on-chip clock pulse generator (CPG) with selectable high-speed OCO, PLL, and external crystal inputs, plus a bus controller (BSC) managing internal memory and peripheral access timing.

Peripheral integration follows the H8S/Tiny functional grouping: serial interfaces (SCI3, IIC2), event-driven data transfer via DTC, and analog sensing via a 10-channel 10-bit ADC with sample-and-hold. All peripherals are memory-mapped to SFRs and support interrupt or DMA-triggered operation without CPU intervention.

Key Specifications

Pinout & Package

This device is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pin functions include dedicated reset (RES#), clock inputs (EXTAL/XTAL), 48 general-purpose I/O lines (with pull-up enable), and peripheral-dedicated pins for UART, I²C, ADC, and timer outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R4F20102RDFA#V0, the R4F20103RDFA#V0 offers scalable flash headroom without layout change, while the R4F20203RDFA#V0 introduces CAN capability at the cost of higher BOM complexity - making R4F20102RDFA#V0 optimal for cost-sensitive, non-networked control tasks.

Availability

R4F20102RDFA#V0 is available at Aetrix Electronics and suitable for industrial motor control, smart home appliances, battery-powered sensor nodes, and motorized actuation systems requiring stable component supply across multi-year production cycles.

Supply support for R4F20102RDFA#V0 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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and power devices for industrial, automotive, and infrastructure markets.

The H8S/Tiny series - including R4F20102RDFA#V0 - was engineered for cost-effective, low-power embedded control in space-constrained applications where deterministic real-time response and long-term supply stability are essential.

FAQ

What is the maximum operating frequency of the R4F20102RDFA#V0?

The R4F20102RDFA#V0 supports a maximum CPU clock frequency of 24 MHz when using the on-chip high-speed OCO or external crystal source. This frequency is achievable 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 R4F20102RDFA#V0 include a hardware watchdog timer?

Yes, the R4F20102RDFA#V0 integrates a dedicated watchdog timer (WDT) with windowed operation mode, programmable timeout period, and selectable reset or interrupt output. The WDT operates independently of the main CPU clock and remains active in all stop modes except DEEP STOP - ensuring reliable recovery from software hangs in safety-critical R4F20102RDFA#V0 deployments.

Can the R4F20102RDFA#V0 perform ADC conversions without CPU intervention?

Yes, the R4F20102RDFA#V0 supports autonomous ADC triggering via timer overflow, external pin assertion, or software command. Once configured, the ADC completes sampling, conversion, and result storage to memory - optionally initiating a DMA transfer - without CPU involvement. This capability is documented in Section 13.3.2 (ADC Trigger Sources) of the R4F20102RDFA#V0 Hardware User's Manual.

What debug interface does the R4F20102RDFA#V0 support?

The R4F20102RDFA#V0 features an on-chip debug interface compliant with Renesas' single-wire debug (SWD) protocol, accessible via the RES# and TDI pins. It supports full real-time debugging, including breakpoints, watchpoints, register inspection, and flash programming - eliminating the need for external JTAG adapters and reducing development tooling cost for R4F20102RDFA#V0-based designs.

Is the R4F20102RDFA#V0 pin-compatible with other H8S/Tiny devices?

No, the R4F20102RDFA#V0 is not universally pin-compatible across the H8S/Tiny family. While it shares the same 64-pin LQFP package with R4F20103RDFA#V0 and R4F20203RDFA#V0, pin assignments for peripheral functions (e.g., SCI3, IIC2, ADC inputs) differ between variants. Board-level compatibility requires verification against the specific pin assignment tables in each device's Hardware User's Manual - for example, R4F20102RDFA#V0 assigns PD0/PD1 to SCI3, whereas R4F20203RDFA#V0 reassigns those pins to CAN_TX/CAN_RX.