Renesas R5F104FEAFP#V0

Overview

R5F104FEAFP#V0 from Renesas is a 44-pin LQFP-packaged 16-bit RL78/G14 microcontroller with 48 KB flash, 5.5 KB RAM, and 4 KB data flash, operating from 1.6–5.5 V at up to 32 MHz (44 DMIPS). It integrates 10-bit ADC (12 channels), UART/SPI/I²C interfaces, RTC, low-power STOP/HALT modes (0.60 μA), and operates across –40°C to +85°C for industrial control and sensor node applications.

For engineers reviewing the R5F104FEAFP#V0 datasheet, R5F104FEAFP#V0 pinout, R5F104FEAFP#V0 application, or R5F104FEAFP#V0 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, 48 KB code flash with self-programming, integrated 10-bit ADC with temperature sensor, and support for LIN-bus-capable UART in resource-constrained embedded designs.

Technical Context

The R5F104FEAFP#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 multiply/divide/accumulate instructions. Its memory subsystem comprises 48 KB on-chip flash (1 KB block size), 4 KB data flash with background operation (BGO), and 5.5 KB SRAM.

Peripheral integration includes a 10-bit ADC with 12 input channels and internal 1.45 V reference, dual UART channels (one LIN-compliant), four I²C interfaces, three CSI/SPI channels, 12-bit interval timer, RTC with calendar/alarm, and event-driven DTC/ELC for low-CPU-overhead peripheral coordination.

Key Specifications

Pinout & Package

Package: 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, plastic body with exposed pad not required (non-HWQFN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F104GEAFP#V0, the R5F104FEAFP#V0 trades flash capacity for lower cost and smaller code footprint-ideal for fixed-function controllers where firmware size is stable. Versus R5F104FEAFB#V0, it offers identical functionality in a more widely supported 44-pin LQFP package, simplifying sourcing and layout reuse.

Availability

R5F104FEAFP#V0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, home appliance control units, and factory automation I/O modules requiring stable component supply, long-term lifecycle assurance, and qualified industrial-grade operation.

Supply support for R5F104FEAFP#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 automotive, industrial, and IoT markets.

The RL78/G14 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications-balancing performance, integration, and energy efficiency without compromising reliability.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating for the R5F104FEAFP#V0?

The R5F104FEAFP#V0 operates at up to 32 MHz with a measured performance of 44 DMIPS. This is achieved using the RL78 CPU core's 3-stage pipeline and optimized instruction set, enabling efficient execution of control algorithms and communication stacks in real-time embedded applications. The R5F104FEAFP#V0 maintains this performance across its full 1.6–5.5 V supply range and industrial temperature grade.

Does the R5F104FEAFP#V0 support LIN bus communication, and how is it implemented?

Yes, the R5F104FEAFP#V0 supports LIN bus communication through its UART0 peripheral, which includes LIN-break detection, sync byte handling, and checksum calculation per LIN 2.x specifications. UART0 can operate in standard UART mode or LIN mode with automatic header/response timing-no external transceiver is needed for basic LIN slave functionality. The R5F104FEAFP#V0 datasheet confirms LIN compliance in Section 1.1 Features and UART functional description.

What are the memory resources allocated to the R5F104FEAFP#V0, and how is data flash utilized?

The R5F104FEAFP#V0 integrates 48 KB of code flash memory, 4 KB of data flash memory, and 5.5 KB of on-chip RAM. The 4 KB data flash supports background operation (BGO), allowing program execution from main flash while simultaneously rewriting data flash-critical for logging sensor data or storing calibration values. It guarantees 1,000,000 write/erase cycles at VDD = 1.8–5.5 V, and the R5F104FEAFP#V0 uses the flash library starting at RAM address FE900H.

How does the R5F104FEAFP#V0 achieve ultra-low power consumption, and what are the key low-power modes?

The R5F104FEAFP#V0 achieves ultra-low power via multiple hardware-optimized modes: HALT (66 μA/MHz), STOP (0.60 μA with RTC + LVD active), and SNOOZE (low-power peripheral operation with CPU halted). These modes leverage the RL78's segmented power domains and clock gating. The R5F104FEAFP#V0 enters STOP mode with just two instructions and wakes on RTC alarm or external interrupt-validated in the datasheet's electrical characteristics table under "Current Consumption."

What is the ADC resolution, channel count, and reference configuration supported by the R5F104FEAFP#V0?

The R5F104FEAFP#V0 features a 10-bit successive-approximation ADC with 12 analog input channels (ANI0–ANI11), selectable internal 1.45 V reference or external AVREFP/AVREFM inputs. It supports single-ended and differential conversions, scan mode, and hardware trigger from timers or ELC events. The R5F104FEAFP#V0 also integrates an on-die temperature sensor usable as an ADC input channel, enabling thermal monitoring without external components.