Renesas R5F5631ECDFP#V0

Overview

R5F5631ECDFP#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 2 MB flash, 128 KB SRAM, and 32 KB data flash. It features 12-bit/10-bit A/D converters (21/8 channels), dual 10-bit D/A outputs, Ethernet MAC (excluded in RX631), USB 2.0 host/function, CAN, multiple SCI/I²C/SPI interfaces, and operates from 2.7–3.6 V at –40 to +85°C in PLQP0100KB-A 100-pin LQFP package. Used in industrial HMI and networked sensor nodes requiring deterministic real-time control.

For engineers reviewing the R5F5631ECDFP#V0 datasheet, R5F5631ECDFP#V0 pinout, R5F5631ECDFP#V0 application, or R5F5631ECDFP#V0 equivalent, key selection criteria include flash/SRAM capacity, peripheral set (e.g., absence of Ethernet vs. RX63N), I/O count (78 pins), temperature grade, and LQFP-100 mechanical compatibility for board layout reuse.

Technical Context

The R5F5631ECDFP#V0 implements the RX CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code. It supports IEEE-754 single-precision floating-point operations and includes two multiply-and-accumulate units plus a 32-bit multiplier executing in one cycle.

Its clock system integrates PLL, internal HOCO/LOCO oscillators, and subclock support for RTC operation down to 2.3 V on VBATT. Power management includes four low-power modes, module stop control, and battery backup capability-enabling long-life operation in energy-constrained embedded systems.

Key Specifications

Pinout & Package

Package: PLQP0100KB-A - 100-pin Low-profile Quad Flat Package, 14 × 14 mm body, 0.5 mm lead pitch, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631ECDFP#V0, R5F563NEDDFP adds Ethernet capability at higher BOM cost and power, while R5F562TADFP trades connectivity for motor-specific peripherals and reduced memory-making each suitable only for distinct system-level requirements.

Availability

R5F5631ECDFP#V0 is available at Aetrix Electronics and suitable for industrial HMI, smart metering, HVAC control, and factory automation applications requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade alternatives.

Supply support for R5F5631ECDFP#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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RX631 Group targets cost-optimized, real-time embedded applications needing rich peripheral integration without Ethernet-emphasizing USB, CAN, analog precision, and functional safety support for industrial control and appliance designs.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631ECDFP#V0?

The R5F5631ECDFP#V0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instruction set. It achieves 165 DMIPS performance and includes hardware floating-point support compliant with IEEE-754 single-precision standard-enabling efficient execution of control algorithms and signal processing tasks within the R5F5631ECDFP#V0.

Does the R5F5631ECDFP#V0 include an Ethernet MAC controller?

No, the R5F5631ECDFP#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and associated EDMAC peripheral present in the RX63N Group. This distinction is confirmed in Renesas documentation: "RX63N Group products incorporate an Ethernet controller while RX631 Group products do not." The R5F5631ECDFP#V0 retains full USB 2.0 host/function/OTG, CAN, and multiple serial interfaces-but requires an external PHY for Ethernet connectivity if needed.

What memory resources are integrated into the R5F5631ECDFP#V0?

The R5F5631ECDFP#V0 integrates 2 MB of on-chip flash memory (with zero wait states at 100 MHz), 128 KB of SRAM, and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. Flash supports on-board programming via JTAG/FINE and off-board parallel programming. The R5F5631ECDFP#V0 uses these resources for application code storage, real-time data buffering, and non-volatile parameter retention-critical for field-upgradable firmware and calibration data in industrial deployments.

Which package type and pin count does the R5F5631ECDFP#V0 use?

The R5F5631ECDFP#V0 is housed in the PLQP0100KB-A package: a 100-pin Low-profile Quad Flat Package measuring 14 × 14 mm with 0.5 mm lead pitch and an exposed thermal pad. This LQFP variant provides 78 general-purpose I/O pins (including 17 with 5-V tolerance), dedicated USB/RTC/oscillator pins, and power/ground distribution optimized for noise-sensitive analog and digital operation-matching Renesas' recommended layout practices for the R5F5631ECDFP#V0.

What safety and reliability features does the R5F5631ECDFP#V0 support for industrial applications?

The R5F5631ECDFP#V0 includes IEC60730-compliant safety features such as oscillation-stoppage detection, hardware CRC calculator (with three polynomials), independent watchdog timer (IWDT), and self-diagnostic capability for the 10-bit A/D converter. It also supports memory protection unit (MPU) enforcement, low-voltage detection (LVD), and four low-power modes-including deep software standby with SRAM retention. These capabilities make the R5F5631ECDFP#V0 suitable for Class B-certifiable applications like home appliances and industrial controllers.