Renesas R5F104EFANA#U0

Overview

R5F104EFANA#U0 from Renesas is a 40-pin HWQFN-packaged RL78/G14 16-bit microcontroller with 64 KB flash, 5.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at -40 to +85°C (A-grade). It delivers 44 DMIPS at 32 MHz, features ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD), and integrates UART, I²C, CSI, 16-bit timers, 10-bit ADC (16 channels), and on-chip RTC for embedded control in battery-powered industrial sensors.

For engineers reviewing the R5F104EFANA#U0 datasheet, R5F104EFANA#U0 pinout, R5F104EFANA#U0 application, or R5F104EFANA#U0 equivalent, key selection criteria include its 40-pin 6×6 mm HWQFN package, 64 KB code flash with self-programming and security lock, real-time clock with calendar/alarm, and support for low-voltage operation down to 1.6 V in consumer-grade ambient conditions.

Technical Context

The R5F104EFANA#U0 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 supports multiply/divide/accumulate instructions and 1 MB address space across four register banks.

Its peripheral set includes 3 UART/LIN channels, up to 10 I²C/simplified I²C channels, 3–8 CSI channels, 8–12 16-bit timer channels (TAU, RJ, RD, RG), 12-bit interval timer, watchdog timer, and background data flash rewriting (BGO) with 1M write cycles endurance at VDD = 1.8–5.5 V.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104EFANA#U0, R5F104EGANA#U0 offers scalable code density for feature-rich firmware, while R5F104EEANA#U0 provides a lower-cost entry point with identical I/O and timing performance - both retain full peripheral and toolchain compatibility.

Availability

R5F104EFANA#U0 is available at Aetrix Electronics and suitable for smart home sensors, industrial motor monitors, and white goods control panels requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F104EFANA#U0 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 targets general-purpose embedded control with emphasis on ultra-low power, integrated analog, and flexible serial connectivity - designed for cost-sensitive, battery-operated, and industrial edge devices.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104EFANA#U0?

The R5F104EFANA#U0 operates at a maximum frequency of 32 MHz and achieves 44 DMIPS (Dhrystone MIPS) under standard benchmark conditions. This performance level is enabled by the RL78 CPU core's 3-stage pipeline and optimized instruction set, supporting real-time deterministic execution for control loops and communication stacks in the R5F104EFANA#U0.

Does the R5F104EFANA#U0 support in-circuit debugging, and what interface is used?

Yes, the R5F104EFANA#U0 supports full in-circuit debugging via its on-chip debug interface using the dedicated P50 (TOOLRxD) and P51 (TOOLTxD) pins. These pins implement a UART-based debug channel compatible with Renesas E2 studio and CS+ IDEs, enabling firmware download, breakpoint setting, and real-time variable inspection without requiring additional JTAG/SWD hardware in the R5F104EFANA#U0.

What are the flash memory configuration options and security features available on the R5F104EFANA#U0?

The R5F104EFANA#U0 includes 64 KB of code flash organized in 1 KB blocks, with programmable security features including block erase prohibition and flash shield window function. It supports self-programming with boot swap capability, allowing safe firmware updates and dual-bank operation. All flash operations occur within the specified 1.8–5.5 V VDD range, and the R5F104EFANA#U0 implements write-protection bits to prevent accidental overwrites.

Can the R5F104EFANA#U0 operate from a single 1.8 V supply, and what peripherals remain functional at that voltage?

Yes, the R5F104EFANA#U0 operates from a single 1.6–5.5 V supply, so 1.8 V is fully supported. At 1.8 V, all core functions, 10-bit ADC (with internal 1.45 V reference), UART, I²C, CSI, 16-bit timers, RTC, and LVD remain operational. The high-speed on-chip oscillator maintains ±1.0% accuracy, and the 64 KB flash supports read/write at this voltage - making the R5F104EFANA#U0 suitable for direct interfacing with 1.8 V logic families.

How many analog input channels does the R5F104EFANA#U0 support, and what ADC resolution and reference options are available?

The R5F104EFANA#U0 supports 16 analog input channels with 10-bit resolution. It provides selectable reference sources: external AVREFP/AVREFM pins or internal 1.45 V reference. The ADC operates across the full 1.6–5.5 V VDD range and includes an integrated temperature sensor for system-level thermal monitoring - all accessible without external components in the R5F104EFANA#U0.