Renesas R5F100EFANA#W0

Overview

R5F100EFANA#W0 from Renesas is a 40-pin HWQFN-packaged RL78/G13 16-bit microcontroller with 64 KB flash, 4 KB data flash, and 4 KB RAM, operating from 1.6–5.5 V at up to 32 MHz (41 DMIPS), optimized for ultra-low-power industrial control and sensor interface applications.

For engineers reviewing the R5F100EFANA#W0 datasheet, R5F100EFANA#W0 pinout, R5F100EFANA#W0 application, or R5F100EFANA#W0 equivalent, key selection criteria include its 64 KB code flash with self-programming, 10-bit 26-channel ADC, real-time clock with calendar, and support for HALT/STOP/SNOOZE low-power modes down to 0.57 μA.

Technical Context

The R5F100EFANA#W0 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 across 1–32 MHz and supports background operation during data flash rewriting.

Its peripheral set includes up to 16× 16-bit timers, 3× I²C channels, 2–4× UART/LIN interfaces, 2–8× CSI/SPI channels, DMA controller (2/4 channels), and hardware multiplier/divider. The device features a 12-bit interval timer, RTC with alarm/calendar, and watchdog timer with dedicated low-speed oscillator.

Key Specifications

Pinout & Package

Package: 40-pin HWQFN (6 × 6 mm, 0.5-mm pitch), moisture-sensitive level 3, lead-free and RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100EGANA#W0, the R5F100EFANA#W0 trades memory headroom for cost and footprint efficiency; compared with R5F101EFANA#W0, it adds robust on-chip data retention capability essential for calibration and configuration persistence without external EEPROM.

Availability

R5F100EFANA#W0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and portable medical devices requiring stable component supply, long-term lifecycle support, and qualified automotive-grade traceability.

Supply support for R5F100EFANA#W0 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 industrial, automotive, and IoT markets.

The RL78/G13 product line delivers true low-power performance for general-purpose embedded applications, targeting cost-sensitive, battery-operated, and energy-efficient systems where code density, peripheral integration, and ultra-low standby current are critical.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100EFANA#W0?

The R5F100EFANA#W0 operates at up to 32 MHz with a peak performance of 41 DMIPS. Its high-accuracy on-chip oscillator supports frequencies from 1 MHz to 32 MHz with ±1.0% tolerance over -20°C to +85°C. This enables deterministic real-time control while maintaining low power consumption - critical for applications like motor drives and sensor nodes where timing precision directly impacts system accuracy and efficiency. The R5F100EFANA#W0 achieves this without requiring external crystals for most use cases.

Does the R5F100EFANA#W0 support in-system programming and secure firmware updates?

Yes, the R5F100EFANA#W0 supports full in-system programming via its on-chip debug interface and includes flash shield window and block erase prohibition features for firmware security. It implements self-programming with boot swap functionality, allowing safe dual-bank firmware updates without halting operation. These capabilities are validated in the RL78/G13 Flash Self-Programming Library (R20UT2944), and the R5F100EFANA#W0's 64 KB flash is organized in 1 KB blocks to enable granular update management.

How does the R5F100EFANA#W0 manage ultra-low-power operation in battery-powered applications?

The R5F100EFANA#W0 achieves industry-leading low-power operation with 66 μA/MHz active current and just 0.57 μA in STOP mode while retaining RTC and LVD functionality. Its HALT, STOP, and SNOOZE modes allow fine-grained power gating: STOP disables CPU and most peripherals but keeps RTC running; SNOOZE permits selective peripheral wake-up (e.g., ADC or UART) without full CPU restart. This enables multi-year battery life in devices like wireless sensors - a key design advantage confirmed in Renesas Application Note R01AN3817.

What analog and timing peripherals are integrated into the R5F100EFANA#W0?

The R5F100EFANA#W0 integrates a 10-bit ADC with up to 26 input channels, internal 1.45 V reference voltage, and an on-die temperature sensor. For timing, it includes a real-time clock with full calendar (99 years), alarm, and clock correction; a 12-bit interval timer; and a watchdog timer with dedicated low-speed oscillator. These peripherals are fully functional in low-power modes - the RTC continues operating in STOP mode, and the ADC can trigger conversions via interval timer events, making the R5F100EFANA#W0 ideal for time-stamped sensor logging.

Is the R5F100EFANA#W0 pin-compatible with other RL78/G13 variants in the same package?

Yes, the R5F100EFANA#W0 is pin-compatible with all 40-pin HWQFN RL78/G13 variants sharing the PWQN0040KC-A package, including R5F100EAANA#W0 through R5F100EHANA#W0. Pin functions, power domains, and peripheral mappings are consistent across this family subset. This allows direct substitution for memory scaling (e.g., upgrading to R5F100EGANA#W0 for 128 KB flash) without PCB redesign - a verified compatibility documented in Renesas' RL78/G13 Package Outline Datasheet PWQN0040KC-A.