Renesas R4F20102NFA#G1

Overview

R4F20102NFA#G1 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 features 64 KB on-chip Flash memory, 4 KB RAM, a 20 MHz max CPU clock, 48-pin LQFP package, and integrated peripherals including UART, I²C, 16-bit timers, and 10-bit ADC.

For engineers reviewing the R4F20102NFA#G1 datasheet, R4F20102NFA#G1 pinout, R4F20102NFA#G1 application, or R4F20102NFA#G1 equivalent, key selection criteria include Flash endurance (10,000 write/erase cycles), operating voltage range (2.7–5.5 V), real-time interrupt latency (<1.5 µs), and support for in-circuit debugging via on-chip BDM interface.

Technical Context

The R4F20102NFA#G1 implements the H8S/2000 CPU core with 24-bit address space, supporting both advanced and standard operating modes. It integrates a Clock Pulse Generator (CPG) with internal oscillator, PLL, and multiple clock source selection for flexible system timing.

Peripheral functions include a Data Transfer Controller (DTC) for autonomous memory transfers, an Event Link Controller (ELC) for hardware-triggered peripheral chaining, and Low-Voltage Detection (LVD) circuitry with programmable threshold (2.7–4.2 V in 0.1 V steps) to enable safe power-down sequencing.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 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 microcontroller applications.

Compared with R4F20103NFA#G1, the R4F20102NFA#G1 trades Flash capacity and one timer for lower unit cost and identical footprint; versus R5F21256SDF#V0, it provides broader peripheral coverage and established H8S ecosystem support at higher active power consumption.

Availability

R4F20102NFA#G1 is available at Aetrix Electronics and suitable for industrial motor control, smart home sensor hubs, POS terminal keypad controllers, and medical infusion pump UIs requiring stable component supply across multi-year production cycles.

Supply support for R4F20102NFA#G1 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 R4F20102NFA#G1, was engineered for cost-sensitive, high-reliability embedded control applications demanding robust real-time performance, integrated peripherals, and long-term supply stability in industrial and consumer equipment.

FAQ

What is the maximum operating frequency of the R4F20102NFA#G1?

The R4F20102NFA#G1 supports a maximum CPU clock frequency of 20 MHz. This is achieved using either the internal high-speed oscillator (with optional PLL multiplication) or an external crystal/resonator up to 20 MHz. At this speed, the H8S/2000 core executes instructions with an average of 1.5 cycles per instruction, enabling deterministic real-time response in control loops and communication stacks. The R4F20102NFA#G1 maintains full functionality-including ADC conversion, UART transmission, and timer capture-within this frequency limit.

Does the R4F20102NFA#G1 include on-chip debug capability?

Yes, the R4F20102NFA#G1 integrates a Background Debug Mode (BDM) interface compliant with Renesas' standard BDM protocol. This allows full in-circuit debugging-including breakpoints, register inspection, memory read/write, and Flash programming-using a single-wire connection and no external JTAG adapter. The BDM circuit operates independently of the main CPU clock, enabling debugging even during low-power STOP or HALT modes. This capability is factory-configured and requires no external components to activate the R4F20102NFA#G1 debug interface.

What are the Flash memory endurance and data retention specifications for the R4F20102NFA#G1?

The R4F20102NFA#G1 features 64 KB of on-chip Flash memory rated for 10,000 write/erase cycles per block and guaranteed data retention of 20 years at +85 °C or 100 years at +25 °C. Erase operations are performed in 128-byte blocks, allowing fine-grained updates without disturbing adjacent firmware sections. The R4F20102NFA#G1 includes hardware-assisted Flash programming with automatic timing control and error detection, eliminating the need for external timing components during in-field firmware upgrades.

Can the R4F20102NFA#G1 operate from a 3.3 V supply?

Yes, the R4F20102NFA#G1 operates across a supply voltage range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. At 3.3 V, it delivers full 20 MHz performance with all peripherals functional, including the 10-bit ADC (which can use VCC as reference or internal 2.5 V), UART, and I²C. The R4F20102NFA#G1's I/O pins are 5 V tolerant when configured as inputs, enabling direct interfacing with 5 V logic without level shifters-critical for mixed-voltage board designs.

What low-power modes does the R4F20102NFA#G1 support, and what are their typical current draws?

The R4F20102NFA#G1 supports four low-power modes: WAIT (CPU stopped, peripherals active), HALT (CPU and most peripherals stopped, RAM retained), STOP (all clocks halted except RTC), and DEEP STOP (only RTC and wakeup logic active). Typical current consumption is 12 mA in active mode (20 MHz, 3.3 V), 150 µA in HALT, 12 µA in STOP, and <1 µA in DEEP STOP. Wake-up from HALT takes ~2 µs; from DEEP STOP, it requires ~100 µs. These values are measured per Renesas' H8S/20103 Group datasheet and apply directly to the R4F20102NFA#G1 under specified conditions.