Renesas R5F100BFGNA#U0

Overview

R5F100BFGNA#U0 from Renesas is a 32-pin RL78/G13 16-bit microcontroller with 128 KB flash, 8 KB data flash, and 12 KB RAM, operating at up to 32 MHz (41 DMIPS), featuring ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), integrated 10-bit ADC (26 channels), real-time clock, and multiple serial interfaces - deployed in battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F100BFGNA#U0 datasheet, R5F100BFGNA#U0 pinout, R5F100BFGNA#U0 application, or R5F100BFGNA#U0 equivalent, key selection criteria include its HWQFN-32 package, -40°C to +105°C industrial temperature grade (G suffix), on-chip debug support, self-programmable flash with boot swap, and BGO-capable data flash for concurrent execution and rewriting.

Technical Context

The R5F100BFGNA#U0 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.

Its peripheral set includes 16× 16-bit timers, 1× 12-bit interval timer, 1× calendar RTC with alarm/correction, 2–4 channel DMA, UART/LIN ×2–4, CSI (SPI-compatible) ×2–8, I²C ×3–10, and 10-bit A/D converter with internal 1.45 V reference and temperature sensor - all configurable via register-based control without external timing components.

Key Specifications

Pinout & Package

Package: HWQFN-32 (5 mm × 5 mm, 0.5 mm pitch, exposed thermal pad, RoHS-compliant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100BFGNA#U0, R5F101BFGNA#U0 removes data flash but retains identical timing and I/O capabilities - ideal for fixed-function firmware; R5F100BGANA#U0 reduces flash/RAM while maintaining the same peripheral set and industrial temperature rating.

Availability

R5F100BFGNA#U0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and factory automation I/O modules requiring stable component supply, long-term lifecycle assurance, and industrial-grade temperature performance.

Supply support for R5F100BFGNA#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 product line delivers ultra-low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications - balancing performance, integration, and energy efficiency without external crystals or regulators.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100BFGNA#U0?

The R5F100BFGNA#U0 operates at up to 32 MHz with a peak performance of 41 DMIPS. Its high-speed on-chip oscillator achieves ±1.0% accuracy across -20°C to +85°C, eliminating need for external crystals in most timing-critical applications. The RL78 core's 3-stage pipeline enables consistent instruction throughput, and minimum instruction time scales from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), supporting both high-speed control and ultra-low-power wake-up events. This makes the R5F100BFGNA#U0 well-suited for real-time motor control and sensor fusion tasks.

Does the R5F100BFGNA#U0 support in-system programming and secure firmware updates?

Yes, the R5F100BFGNA#U0 supports full in-system programming via on-chip debug interface and includes boot swap functionality for safe dual-bank firmware updates. Its flash shield window feature restricts access to designated memory regions during runtime, preventing unauthorized reads or writes. The device also supports block erase prohibition for enhanced security. These capabilities enable field firmware upgrades without requiring external programmers or exposing sensitive code - critical for certified industrial and metering deployments where R5F100BFGNA#U0 serves as the trusted execution anchor.

How does the R5F100BFGNA#U0 manage power in battery-operated applications?

The R5F100BFGNA#U0 achieves industry-leading low-power operation: 66 μA/MHz in active mode and just 0.57 μA in STOP mode with RTC and LVD active. Its HALT, STOP, and SNOOZE modes allow granular power gating per peripheral, and wake-up sources include RTC alarms, LVD thresholds, and external interrupts. The integrated 32.768 kHz RTC maintains calendar time across power cycles, while the 14-level LVD provides configurable brown-out detection - all powered from the same 1.6–5.5 V supply used by R5F100BFGNA#U0. This eliminates auxiliary power rails and simplifies design for multi-year battery life.

What analog and timing peripherals are integrated into the R5F100BFGNA#U0?

The R5F100BFGNA#U0 integrates a 10-bit A/D converter with up to 26 input channels, internal 1.45 V reference voltage, and an on-die temperature sensor - usable without calibration in many industrial sensing applications. For timing, it includes one calendar RTC (99-year range, alarm, correction), one 12-bit interval timer, 16× 16-bit general-purpose timers (with PWM and input capture), and a watchdog timer driven by a dedicated low-speed oscillator. All are register-configurable and require no external components - reducing BOM count and PCB area for R5F100BFGNA#U0-based designs.

Is the R5F100BFGNA#U0 pin-compatible with other RL78/G13 variants in the same package?

Yes, the R5F100BFGNA#U0 shares identical pinout and electrical characteristics with all other RL78/G13 devices in the HWQFN-32 package (e.g., R5F100BGANA#U0, R5F101BFGNA#U0), including identical power, reset, clock, and I/O pin assignments. This enables direct substitution within the same footprint for memory or feature scaling - for example, upgrading from 96 KB to 128 KB flash without layout changes. However, functional differences (e.g., presence/absence of data flash) must be verified in software initialization routines when migrating to or from R5F100BFGNA#U0.