Renesas R5F104MKGFB#30

Overview

R5F104MKGFB#30 from Renesas is an RL78/G14 8-bit MCU with 384 KB flash, 32 KB RAM, and 80-pin LFQFP (0.5 mm pitch) package, operating from 1.6–5.5 V at -40 to +105°C (industrial G-grade). It delivers 44 DMIPS at 32 MHz, features a 12-bit RTC with calendar, 16-bit timers (12 channels), 10-bit ADC (16 channels), and ultra-low power consumption (66 μA/MHz active, 0.60 μA in RTC+LVD mode), targeting industrial control and sensor interface applications.

For engineers reviewing the R5F104MKGFB#30 datasheet, R5F104MKGFB#30 pinout, R5F104MKGFB#30 application, or R5F104MKGFB#30 equivalent, key selection considerations include its G-grade temperature rating, integrated event link controller (ELC), background data flash rewriting capability, and support for LIN-bus UART - all critical for robust, low-power embedded systems requiring long-term reliability and real-time peripheral coordination.

Technical Context

The R5F104MKGFB#30 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 µs @ 32 MHz to 30.5 µs @ 32.768 kHz). It integrates a Data Transfer Controller (DTC) supporting normal, repeat, and block transfer modes triggered by 19–26 event sources via the Event Link Controller (ELC), enabling deterministic peripheral-to-peripheral data movement without CPU intervention.

Its mixed-signal subsystem includes a 10-bit A/D converter with internal 1.45 V reference and temperature sensor, dual 8-bit D/A outputs (0–VDD), two comparators with window/high-speed/low-speed modes, and a real-time clock with alarm and calendar functions - all designed for autonomous analog monitoring and time-stamped control in resource-constrained industrial nodes.

Key Specifications

Pinout & Package

Package: 80-pin LFQFP, 12 × 12 mm body, 0.5 mm pitch, lead-free, RoHS-compliant. Thermal pad recommended to be connected to ground for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104MLGFB#30, the R5F104MKGFB#30 provides 128 KB more flash and 8 KB more RAM for larger firmware or data buffering, while compared with R5F104PKGFB#30, it offers identical processing capability in a smaller, lower-cost 80-pin footprint - ideal for space-constrained industrial modules where I/O expansion is not required.

Availability

R5F104MKGFB#30 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, programmable power supply monitors, and battery-backed RTC applications requiring stable component supply across extended product lifecycles.

Supply support for R5F104MKGFB#30 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 family is engineered for ultra-low-power general-purpose embedded control, emphasizing energy efficiency, integrated analog peripherals, and seamless toolchain support - targeting cost-sensitive, high-reliability industrial and consumer applications.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F104MKGFB#30?

The R5F104MKGFB#30 operates up to 32 MHz with a high-speed on-chip oscillator accurate to ±1.0% over -20 to +85°C. At this frequency, it achieves 44 DMIPS (Dhrystone 2.1), supported by its 3-stage pipeline RL78 core and optimized instruction set including hardware multiply/divide. This performance level enables real-time control tasks such as motor commutation and sensor fusion in compact industrial designs.

Does the R5F104MKGFB#30 support LIN bus communication, and how is it implemented?

Yes, the R5F104MKGFB#30 supports LIN bus communication through its UART peripherals, which include hardware LIN protocol features compliant with ISO 17987. The UART can generate and decode LIN headers, handle checksum calculation, and manage automatic baud rate detection - all without CPU intervention. This capability is confirmed in the RL78/G14 datasheet section "Serial Interfaces" and applies directly to the R5F104MKGFB#30 variant.

What are the flash memory configuration details for the R5F104MKGFB#30?

The R5F104MKGFB#30 contains 384 KB of on-chip code flash memory organized in 1 KB blocks, with security features to prohibit block erase and rewriting. It also includes 8 KB of data flash memory supporting background operation (BGO), allowing program execution during write/erase cycles. The flash library uses RAM starting at address F3F00H, as specified in the RL78/G14 datasheet for R5F104xL variants like the R5F104MKGFB#30.

How does the R5F104MKGFB#30 achieve ultra-low power consumption in STOP mode?

The R5F104MKGFB#30 achieves 0.60 μA typical current in STOP mode by powering down the CPU, flash, RAM, and most peripherals while retaining operation of the real-time clock (RTC) and low-voltage detector (LVD). This mode is enabled via software control and maintains calendar functionality and voltage monitoring - critical for battery-backed applications where periodic wake-up or fault detection must persist without significant drain.

What is the purpose of the REGC pin on the R5F104MKGFB#30, and how must it be connected?

The REGC pin on the R5F104MKGFB#30 connects to the internal LDO regulator's stabilization capacitor. Per the RL78/G14 datasheet, it must be connected to VSS via a 0.47–1 µF ceramic capacitor placed as close as possible to the pin. Failure to do so risks unstable internal voltage regulation, leading to erratic operation or failure to enter low-power modes reliably - a mandatory design requirement for all R5F104MKGFB#30 implementations.