Renesas R5F100GFGNA#20

Overview

R5F100GFGNA#20 from Renesas is a 48-pin, 128 KB flash, 8 KB data flash, 12 KB RAM RL78/G13 16-bit microcontroller with ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), 1.6–5.5 V operation, and integrated peripherals including 10-bit ADC (26 channels), real-time clock, UART/SPI/I²C, and 16-bit timers. It targets battery-powered industrial sensors and smart metering endpoints.

For engineers reviewing the R5F100GFGNA#20 datasheet, R5F100GFGNA#20 pinout, R5F100GFGNA#20 application, or R5F100GFGNA#20 equivalent, key selection criteria include its HWQFN-48 package with 0.5-mm pitch, -40°C to +105°C industrial temperature grade (G-suffix), on-chip debug support, and self-programmable flash with boot swap capability.

Technical Context

The R5F100GFGNA#20 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (@32 MHz high-speed oscillator) to 30.5 μs (@32.768 kHz subsystem clock). It integrates a 12-bit interval timer, calendar-based real-time clock with alarm and correction functions, and background operation for data flash rewriting while executing code from program memory.

Power management includes HALT, STOP, and SNOOZE low-power modes, on-chip POR and 14-level LVD, and DMA controller with 4 channels enabling 2-clock transfers between SFR and RAM. The device supports multiple serial interfaces - up to 8 CSI (SPI-compatible), 4 UART/LIN, and 10 I²C channels - with configurable I/O ports (48 total, including N-ch open-drain capable of 6 V tolerance).

Key Specifications

Pinout & Package

Package: HWQFN-48 (7 × 7 mm, 0.5-mm pitch), wettable flank, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100GEGNA#20, the R5F100GFGNA#20 provides guaranteed operation at +105°C for harsh environments, while versus R5F100GGGNA#20 it offers optimal cost/performance balance for fixed-function metering and sensor nodes without memory headroom requirements.

Availability

R5F100GFGNA#20 is available at Aetrix Electronics and suitable for smart energy meters, industrial sensor nodes, home automation hubs, and medical wearables requiring stable component supply across long production lifecycles.

Supply support for R5F100GFGNA#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 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 true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated industrial and consumer applications demanding high integration and long-term reliability.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F100GFGNA#20?

The R5F100GFGNA#20 operates up to 32 MHz using its high-speed on-chip oscillator with ±1.0% accuracy. At this frequency, active current consumption is 66 μA per MHz, resulting in approximately 2.1 mA total at 32 MHz with all peripherals disabled. In STOP mode with only RTC and LVD active, it draws just 0.57 μA-critical for multi-year battery operation in the R5F100GFGNA#20.

Does the R5F100GFGNA#20 support in-system programming and secure firmware updates?

Yes, the R5F100GFGNA#20 supports full in-system programming via its on-chip debug interface and includes self-programming capability with boot swap function and flash shield window. These features allow field firmware updates without external programmers and prevent unauthorized access to protected memory regions-essential for secure deployment of the R5F100GFGNA#20 in certified metering or medical devices.

How many analog input channels does the R5F100GFGNA#20 provide, and what ADC resolution is supported?

The R5F100GFGNA#20 integrates a 10-bit successive-approximation ADC with up to 26 analog input channels. It includes an internal 1.45 V reference voltage and a calibrated temperature sensor, both accessible via dedicated ANI pins. This ADC configuration enables high-accuracy sensor interfacing-such as thermistor or strain gauge measurements-directly within the R5F100GFGNA#20 without external components.

What serial communication interfaces are available on the R5F100GFGNA#20, and are they hardware-accelerated?

The R5F100GFGNA#20 provides hardware-accelerated serial interfaces: up to 8 CSI (SPI-compatible) channels, 4 UART/LIN channels (with LIN bus support), and up to 10 I²C/Simplified I²C channels. All operate independently with dedicated registers and interrupt vectors, allowing concurrent communication with multiple sensors, displays, or transceivers without CPU overhead-maximizing real-time performance in the R5F100GFGNA#20.

Is the R5F100GFGNA#20 pin-compatible with other RL78/G13 variants in the same package?

Yes, all RL78/G13 devices in the 48-pin HWQFN package-including R5F100GFGNA#20, R5F100GEGNA#20, and R5F100GGGNA#20-share identical pinouts and electrical characteristics. This allows direct substitution during design-in or qualification, provided firmware accommodates differences in flash size, RAM, or temperature grade-ensuring flexibility across the R5F100GFGNA#20 family.