Renesas R5F104FEDFP#V0

Overview

R5F104FEDFP#V0 from Renesas is a 44-pin LQFP-44, 96 KB flash, 12 KB RAM RL78/G14 16-bit microcontroller operating from 1.6 V to 5.5 V, delivering 44 DMIPS at 32 MHz with ultra-low power consumption (66 μA/MHz active, 0.60 μA RTC+LVD mode), used in battery-powered industrial sensors and smart metering interfaces.

For engineers reviewing the R5F104FEDFP#V0 datasheet, R5F104FEDFP#V0 pinout, R5F104FEDFP#V0 application, or R5F104FEDFP#V0 equivalent, key selection criteria include its 44-pin LQFP package, 96 KB code flash with data flash, integrated 10-bit ADC (20-channel), dual UART/LIN support, and real-time clock with calendar function for time-stamped telemetry and low-power wake-up control.

Technical Context

The R5F104FEDFP#V0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), and includes on-chip debug, self-programming with boot swap, and background operation for data flash rewriting.

It integrates event-driven peripherals including Event Link Controller (ELC) for 19–26 configurable event sources, Data Transfer Controller (DTC) with chain transfer, and multiple serial interfaces: up to 8 CSI channels, 4 UART/LIN channels, and 10 I²C channels - all configurable via peripheral I/O redirection registers.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit microcontroller applications.

Compared with R5F104FEDFP#V0, R5F104FGDFP#V0 offers 33% more flash and 33% more RAM in identical packaging for seamless scalability, while R5F104FEAFP#V0 reduces memory and cost but mandates layout adjustment due to pitch difference - making it a functional alternative only with board revision.

Availability

R5F104FEDFP#V0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, home appliance control, and building automation panels requiring stable component supply across extended product lifecycles.

Supply support for R5F104FEDFP#V0 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/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and energy-efficient embedded systems requiring rich analog integration and robust peripheral flexibility.

FAQ

What is the maximum operating frequency and associated performance of the R5F104FEDFP#V0?

The R5F104FEDFP#V0 operates at up to 32 MHz using its high-accuracy on-chip oscillator (±1.0%), delivering 44 DMIPS. Its RL78 CPU core achieves minimum instruction execution times of 0.03125 μs at 32 MHz and supports variable-speed operation down to 32.768 kHz for ultra-low-power RTC functions. This enables deterministic real-time response in motor control and sensor polling applications while maintaining sub-μA sleep currents.

Does the R5F104FEDFP#V0 support in-system programming and secure firmware updates?

Yes, the R5F104FEDFP#V0 supports full in-system programming via on-chip debug interface and includes self-programming capabilities with boot swap function and flash shield window protection. It allows secure firmware updates by locking specific flash blocks against erase/write, and background operation enables data logging to data flash while application code executes from program flash - critical for fail-safe over-the-air updates in remote deployments.

How many analog input channels does the R5F104FEDFP#V0 provide, and what ADC resolution is supported?

The R5F104FEDFP#V0 integrates a 10-bit successive-approximation ADC with up to 20 analog input channels (ANI0–ANI19), operating across the full 1.6–5.5 V supply range. It includes an internal 1.45 V reference voltage and on-die temperature sensor, enabling direct thermal compensation in sensor nodes without external components. Channel selection and conversion triggering can be fully controlled via ELC or software for deterministic timing.

What serial communication interfaces are available on the R5F104FEDFP#V0, and how are they configured?

The R5F104FEDFP#V0 provides 4 UART/LIN channels, up to 8 CSI (SPI-compatible) channels, and up to 10 I²C/simplified I²C channels. All interfaces support peripheral I/O redirection via PIOR0/PIOR1 registers, allowing dynamic pin assignment. UARTs include LIN bus physical layer compliance and break detection; CSI modules support master/slave modes with programmable clock polarity/phase; I²C supports standard/fast-mode speeds and slave address masking.

What power-saving modes are implemented in the R5F104FEDFP#V0, and what is the lowest achievable current draw?

The R5F104FEDFP#V0 implements HALT, STOP, and SNOOZE low-power modes. In STOP mode with only RTC and LVD active, it draws just 0.60 μA at VDD = 1.8–5.5 V and TA = –40 to +85°C. SNOOZE mode permits selective peripheral operation (e.g., UART receive, ADC scan) without waking the CPU core, reducing average current in intermittent communication systems. Wake-up from any mode is possible via external interrupt, RTC alarm, or peripheral event routed through ELC.