Renesas R5F100GFGFB#X0

Overview

R5F100GFGFB#X0 from Renesas is a 48-pin LFQFP (7 × 7 mm, 0.5-mm pitch), industrial-grade RL78/G13 16-bit microcontroller with 128 KB flash, 8 KB data flash, 12 KB RAM, and operation up to 32 MHz delivering 41 DMIPS - deployed in battery-powered sensor nodes, motor control modules, and smart HVAC actuators.

For engineers reviewing the R5F100GFGFB#X0 datasheet, R5F100GFGFB#X0 pinout, R5F100GFGFB#X0 application, or R5F100GFGFB#X0 equivalent, key selection considerations include its -40°C to +105°C industrial temperature rating, integrated RTC with calendar/alarm, ultra-low-power STOP mode (0.57 μA), and hardware BGO for concurrent code execution during data flash rewrite.

Technical Context

The R5F100GFGFB#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz selectable) and dedicated low-speed oscillator for watchdog and RTC.

Peripheral integration includes 16-bit timer channels (12 total), 10-bit A/D converter with 26 analog inputs and internal 1.45 V reference, 3-channel I²C/Simplified I²C, 2-channel UART/LIN, and 2-channel CSI (SPI-compatible serial interface), all accessible via configurable GPIO with N-ch open-drain, TTL input, and pull-up options.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (7 × 7 mm, 0.5-mm pitch), RoHS-compliant, industrial temperature grade (-40°C to +105°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100GFGFB#X0, R5F100GGGFB#X0 trades extended temperature range for lower unit cost, while R5F101GFGFB#X0 removes data flash to reduce silicon area - both retain identical peripheral sets and real-time performance, enabling design reuse where thermal or nonvolatile data requirements differ.

Availability

R5F100GFGFB#X0 is available at Aetrix Electronics and suitable for smart thermostats, industrial motor drives, and energy meters requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F100GFGFB#X0 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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RL78/G13 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and thermally demanding embedded systems - balancing performance, integration, and energy efficiency.

FAQ

What is the maximum operating frequency and associated performance of the R5F100GFGFB#X0?

The R5F100GFGFB#X0 operates at up to 32 MHz using its high-speed on-chip oscillator, achieving 41 DMIPS of processing performance. Its minimum instruction execution time is 0.03125 μs under these conditions, and it supports dynamic clock scaling down to 32.768 kHz for ultra-low-power RTC operation - all within a single device without external clock components.

Does the R5F100GFGFB#X0 support in-system programming and secure firmware updates?

Yes, the R5F100GFGFB#X0 supports full in-system programming via its on-chip debug interface and includes self-programming capabilities for both code and data flash. It features flash shield window protection and block erase prohibition to prevent unauthorized reprogramming - critical for certified medical and industrial firmware deployments.

How does the R5F100GFGFB#X0 manage power in battery-constrained applications?

The R5F100GFGFB#X0 offers three ultra-low-power modes: HALT (66 μA/MHz), STOP (0.57 μA with RTC and LVD active), and SNOOZE (peripheral-triggered wake-up). Its ability to maintain calendar-accurate time and detect undervoltage events while drawing sub-μA current makes it ideal for decade-long battery operation in remote sensors and utility meters.

Can the R5F100GFGFB#X0 interface directly with 1.8 V or 2.5 V logic devices?

Yes, the R5F100GFGFB#X0 supports different-potential interface operation: its GPIO ports can be configured for TTL input buffer and N-ch open-drain output with VDD or EVDD withstand voltage, enabling direct connection to 1.8 V, 2.5 V, or 3.3 V peripherals without level-shifting circuitry - verified across all 48 pins in the LFQFP package.

What serial communication protocols are supported by the R5F100GFGFB#X0?

The R5F100GFGFB#X0 integrates three protocol families: 3-channel I²C/Simplified I²C (with clock stretching and arbitration), 2-channel UART with LIN bus support (including automatic sync-break detection), and 2-channel CSI (SPI-compatible serial interface with master/slave modes). All channels operate independently with dedicated clock sources and configurable baud rates.