Renesas R5F104GKGNA#20

Overview

R5F104GKGNA#20 from Renesas is a 48-pin HWQFN-packaged 16-bit RL78/G14 microcontroller with 384 KB flash, 8 KB data flash, 24 KB RAM, and industrial-grade operation up to +105°C. It delivers 44 DMIPS at 32 MHz, consumes 66 μA/MHz active and 0.60 μA in RTC+LVD-only mode, and integrates UART, I²C, SPI, 12-bit RTC, 10-bit ADC (20 ch), and DTC/ELC peripherals for embedded control in power-constrained industrial systems.

For engineers reviewing the R5F104GKGNA#20 datasheet, R5F104GKGNA#20 pinout, R5F104GKGNA#20 application, or R5F104GKGNA#20 equivalent, key selection criteria include its 384 KB code flash capacity, G-grade temperature range (−40 to +105°C), HWQFN-48 7×7 mm 0.5 mm pitch package, and support for background data flash rewriting with 1M-cycle endurance.

Technical Context

The R5F104GKGNA#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). It features dual-clock domains: high-speed on-chip oscillator (selectable 1–64 MHz, ±1.0% accuracy) and subsystem clock for ultra-low-power RTC/LVD operation.

Peripheral integration includes Event Link Controller (ELC) enabling hardware-triggered peripheral chaining without CPU intervention, Data Transfer Controller (DTC) supporting block/repeat transfers activated by 19–26 event sources, and simplified SPI (CSI), UART/LIN, and I²C interfaces with flexible pin remapping via PIOR registers.

Key Specifications

Pinout & Package

Package: HWQFN-48, 7 × 7 mm body, 0.5 mm pitch, exposed die pad (recommended connection to VSS).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GKGNA#20, R5F104GLGNA#20 offers +8 KB RAM for enhanced multitasking without layout changes, while R5F104GJGNA#20 reduces flash capacity by 128 KB to lower unit cost - both maintain identical G-grade temperature, HWQFN-48 packaging, and peripheral feature set.

Availability

R5F104GKGNA#20 is available at Aetrix Electronics and suitable for industrial motor drives, smart metering systems, and building automation controllers requiring stable component supply, long-term lifecycle support, and guaranteed G-grade temperature compliance.

Supply support for R5F104GKGNA#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 extended battery life, robust peripheral integration, and seamless migration from legacy 8-bit platforms.

FAQ

What is the maximum operating frequency and associated performance of the R5F104GKGNA#20?

The R5F104GKGNA#20 operates at up to 32 MHz with its high-speed on-chip oscillator, delivering 44 DMIPS of processing performance. Its minimum instruction execution time is 0.03125 µs at 32 MHz, and it supports slower clock domains down to 32.768 kHz for ultra-low-power RTC operation. The RL78 core's 3-stage pipeline ensures deterministic timing critical for real-time control tasks executed by the R5F104GKGNA#20.

Does the R5F104GKGNA#20 support in-system programming and secure firmware updates?

Yes, the R5F104GKGNA#20 supports full in-system programming via on-chip debug interface and implements boot swapping for secure firmware updates. Its flash shield window function prohibits unauthorized block erasure or rewriting, and self-programming capabilities allow field upgrades without external programmers. These features ensure safe, authenticated firmware deployment essential for certified industrial deployments of the R5F104GKGNA#20.

What analog peripherals are integrated into the R5F104GKGNA#20 and how are they configured?

The R5F104GKGNA#20 integrates a 10-bit ADC with 20 input channels, internal 1.45 V reference, and on-chip temperature sensor; an 8-bit DAC with two output channels (0–VDD range); and up to two comparators with selectable internal/external references. Configuration is performed via dedicated control registers (ADCR, DACR, CMPR), and conversion results are accessible via memory-mapped registers or DMA transfer - all fully supported in the R5F104GKGNA#20's hardware architecture.

How does the R5F104GKGNA#20 manage power in battery-operated applications?

The R5F104GKGNA#20 achieves industry-leading low-power operation with 66 μA/MHz active current and 0.60 μA in HALT mode (RTC + LVD only). It supports three ultra-low-power states: STOP (RAM retention, deep sleep), HALT (RTC/LVD active), and SNOOZE (peripheral operation with CPU halted). Voltage detector (LVD) thresholds are programmable across 14 levels, enabling precise brown-out response - critical for reliable operation in energy-harvesting or coin-cell-powered systems using the R5F104GKGNA#20.

Is the R5F104GKGNA#20 pin-compatible with other RL78/G14 variants in the same package?

Yes, the R5F104GKGNA#20 is pin-compatible with all RL78/G14 devices in the HWQFN-48 package (e.g., R5F104GLGNA#20, R5F104GJGNA#20), sharing identical pin count, pitch, footprint, and basic I/O functionality. Peripheral assignments may differ slightly due to variant-specific feature enablement, but pin roles (power, reset, clocks, serial interfaces) remain consistent - enabling hardware reuse across firmware variants without PCB redesign for the R5F104GKGNA#20.