Renesas R5F104EDGNA#20

Overview

R5F104EDGNA#20 from Renesas is a 32-bit RL78/G14 microcontroller featuring 32 KB flash memory, 4 KB data flash, and 4 KB RAM in a 40-pin HWQFN package (6 × 6 mm, 0.5 mm pitch), operating from 1.6 V to 5.5 V with ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in industrial sensor nodes and battery-powered control modules.

For engineers reviewing the R5F104EDGNA#20 datasheet, R5F104EDGNA#20 pinout, R5F104EDGNA#20 application, or R5F104EDGNA#20 equivalent, key selection criteria include its 32 KB code flash capacity, 40-pin HWQFN thermal performance, -40°C to +105°C industrial temperature grade (G suffix), and integrated peripherals including 10-bit ADC (16 channels), UART/LIN, I²C, and real-time clock with calendar function.

Technical Context

The R5F104EDGNA#20 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 high-accuracy ±1.0% on-chip oscillator (selectable from 1–64 MHz) and supports SNOOZE mode for low-latency peripheral wake-up without CPU intervention.

Its peripheral set includes an Event Link Controller (ELC) enabling direct hardware-triggered transfers between 19–26 event sources and peripherals, plus a Data Transfer Controller (DTC) supporting block, repeat, and chain transfer modes-reducing CPU load during ADC-to-memory or UART-to-buffer operations.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS for thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EDGNA#20, R5F104EEGNA#20 provides 16 KB more flash for feature-rich firmware, while R5F104FDGNA#20 adds 32 KB flash and supports more demanding control tasks-both maintain pin compatibility and thermal performance for drop-in scalability.

Availability

R5F104EDGNA#20 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, automotive body electronics, and IoT sensor hub designs requiring stable component supply across long production lifecycles.

Supply support for R5F104EDGNA#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, and power management solutions for industrial, automotive, and infrastructure markets.

The RL78/G14 family delivers true low-power performance for general-purpose embedded applications, targeting cost-sensitive industrial controls, metering, and sensor systems where energy efficiency and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the R5F104EDGNA#20?

The R5F104EDGNA#20 supports up to 32 MHz operation using the high-speed on-chip oscillator, delivering 44 DMIPS performance. Its minimum instruction execution time is 0.03125 µs at 32 MHz, and it can scale down to 32.768 kHz for ultra-low-power RTC operation with 30.5 µs instruction time. The oscillator accuracy is ±1.0% across 1.8–5.5 V and -20°C to +85°C ambient conditions.

Does the R5F104EDGNA#20 support in-system programming?

Yes, the R5F104EDGNA#20 supports full in-system programming via its on-chip debug interface. It enables self-programming of both code flash and data flash with boot swapping functionality, allowing safe firmware updates without halting real-time operation. The flash shield window feature restricts access to protected memory regions during debugging sessions.

How many serial communication interfaces does the R5F104EDGNA#20 include?

The R5F104EDGNA#20 integrates three UART/LIN modules (supporting LIN 2.2), up to ten I²C/simplified I²C channels, and three to eight CSI (SPI-compatible) channels. All are configurable via peripheral I/O redirection registers, allowing flexible pin assignment for PCB layout optimization without hardware changes.

What is the purpose of the REGC pin on the R5F104EDGNA#20?

The REGC pin on the R5F104EDGNA#20 is the bypass capacitor terminal for the internal voltage regulator. It must be connected to VSS via a 0.47 µF to 1 µF ceramic capacitor to stabilize the LDO output and ensure reliable operation of the core and analog peripherals. Failure to populate this capacitor may cause erratic reset behavior or ADC inaccuracies.

Can the R5F104EDGNA#20 operate from a 1.8 V supply?

Yes, the R5F104EDGNA#20 operates across a 1.6 V to 5.5 V supply range, making it fully compatible with 1.8 V systems. Its I/O ports support different-potential interfacing, allowing direct connection to 1.8 V, 2.5 V, or 3.0 V peripherals without level-shifting circuitry-reducing BOM count and board area in mixed-voltage designs.