Renesas R5F104GEGNA#20

Overview

R5F104GEGNA#20 from Renesas is a 48-pin HWQFN-packaged 16-bit RL78/G14 microcontroller with 128 KB flash, 12 KB RAM, and 8 KB data flash, operating from 1.6–5.5 V at up to 32 MHz (44 DMIPS), featuring ultra-low-power HALT/STOP/SNOOZE modes, integrated RTC, 10-bit ADC (20 ch), and UART/I²C/CSI interfaces for industrial sensor control and motor drive applications.

For engineers reviewing the R5F104GEGNA#20 datasheet, R5F104GEGNA#20 pinout, R5F104GEGNA#20 application, or R5F104GEGNA#20 equivalent, key selection criteria include its -40°C to +105°C industrial temperature grade (G), 48-pin 0.5 mm pitch HWQFN package, 128 KB code flash with self-programming support, and peripheral set including Timer RD/RA/TAU, DTC, ELC, and dual voltage detector levels.

Technical Context

The R5F104GEGNA#20 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 µs (32 MHz) to 30.5 µs (32.768 kHz), and includes on-chip high-accuracy ±1.0% oscillator (1–64 MHz selectable). It integrates Data Transfer Controller (DTC) with chain transfer and Event Link Controller (ELC) for hardware-triggered peripheral coordination without CPU intervention.

Its analog subsystem comprises a 10-bit A/D converter with 20 input channels, internal 1.45 V reference and temperature sensor, plus an 8-bit D/A converter (2-channel output, 0–VDD range) and two comparators with window/high-speed/low-speed modes - all operable under low-voltage conditions down to 1.6 V.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (7 × 7 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS. Pin functions are configurable via Peripheral I/O Redirection Registers (PIOR0/1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GEGNA#20, R5F104GEHNA#20 offers scalable memory headroom for future firmware growth, while R5F104GGHNA#20 trades RAM margin for expanded data flash - both retain identical pin compatibility, industrial G-grade rating, and low-power architecture.

Availability

R5F104GEGNA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, home appliance UIs, and PLC I/O modules requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.

Supply support for R5F104GEGNA#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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive industrial and consumer applications requiring robust analog integration, flexible clocking, and ultra-low standby current - with R5F104GEGNA#20 targeting mid-complexity control tasks.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F104GEGNA#20?

The R5F104GEGNA#20 operates at up to 32 MHz with a measured performance of 44 DMIPS. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator. The device maintains full functionality-including ADC, timers, and serial interfaces-at this speed, and supports dynamic clock scaling down to 32.768 kHz for ultra-low-power RTC operation.

Does the R5F104GEGNA#20 support in-system programming and secure firmware updates?

Yes, the R5F104GEGNA#20 supports full in-system programming via its on-chip debug interface and includes flash shield window protection, boot swapping, and block erase prohibition features. These capabilities enable secure over-the-air or field firmware updates while preventing unauthorized access to protected code sections - critical for industrial deployments where firmware integrity is mandatory.

What analog peripherals are integrated into the R5F104GEGNA#20 and how are they configured?

The R5F104GEGNA#20 integrates a 10-bit A/D converter with 20 input channels, an 8-bit D/A converter with up to two outputs (0–VDD range), and two analog comparators. All analog blocks operate across the full 1.6–5.5 V supply range. Configuration is done via dedicated registers: AD control registers for sampling timing and channel selection, DA control registers for output enable and data loading, and comparator control registers for mode (window/high-speed/low-speed) and reference source selection.

How does the R5F104GEGNA#20 achieve ultra-low power consumption in STOP mode?

The R5F104GEGNA#20 achieves 0.60 μA in STOP mode by disabling the main CPU, flash, and most peripherals while retaining power to the real-time clock (RTC), low-voltage detector (LVD), and associated wakeup circuitry. The RTC continues calendar/timekeeping with alarm capability, and the LVD monitors supply voltage at one of 14 selectable thresholds - enabling deterministic wake-up on time or voltage events without external components.

Is the R5F104GEGNA#20 pin-compatible with other RL78/G14 variants in the same package?

Yes, the R5F104GEGNA#20 is fully pin-compatible with all other RL78/G14 devices in the 48-pin HWQFN package (e.g., R5F104GEHNA#20, R5F104GGHNA#20), sharing identical pin assignments, electrical characteristics, and peripheral mapping. This allows direct substitution within the same footprint for memory or feature scaling - provided software is adapted to leverage additional resources like larger flash or RAM.