Renesas R5F5631FHDFB#V0

Overview

R5F5631FHDFB#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 2 MB flash, 256 KB SRAM, and 32 KB data flash. It features 10- and 12-bit A/D converters (21+8 channels), dual 10-bit D/A outputs, Ethernet MAC (not present in RX631), USB 2.0 host/function/OTG, CAN, RTC, and AES encryption - designed for industrial control and networked embedded systems requiring deterministic real-time performance and secure connectivity.

For engineers reviewing the R5F5631FHDFB#V0 datasheet, R5F5631FHDFB#V0 pinout, R5F5631FHDFB#V0 application, or R5F5631FHDFB#V0 equivalent, this MCU delivers verified 165 DMIPS throughput, IEEE-754 single-precision floating-point support, 133 GPIOs (18 5-V tolerant), and IEC60730-compliant safety functions including CRC, self-diagnostic A/D, and oscillation-stop detection - critical for functional safety certification in motor drives and building automation.

Technical Context

The R5F5631FHDFB#V0 implements the CISC Harvard-architecture RX CPU core with 5-stage pipeline, variable-length instructions, and memory protection unit (MPU). It operates at up to 100 MHz with 10 ns zero-wait-state flash access and supports little-endian or big-endian data arrangement.

Its peripheral set includes three CAN modules (32 mailboxes each), four I²C interfaces (1 Mbps max), thirteen SCI channels with flexible modes (asynchronous, SPI/I²C emulation, LIN), and dedicated DMA controllers (DMAC, EXDMAC, DTC) for offloading Ethernet, USB, and sensor data transfers - enabling concurrent high-bandwidth communication without CPU saturation.

Key Specifications

Pinout & Package

Package: PLQP0144KA-A - 144-pin LQFP, 20 × 20 mm, 0.5 mm pitch, RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631FHDFB#V0, R5F563NFDHFB#V0 adds Ethernet and SDRAM support at identical pin count and memory size, while R5F566TEHDFB#V0 trades USB/IEBus for motor-specific timers and 60 MHz higher CPU speed - making each alternative optimal only for distinct subsystem requirements rather than drop-in replacement.

Availability

R5F5631FHDFB#V0 is available at Aetrix Electronics and suitable for industrial motor control, building automation gateways, medical diagnostic interfaces, and energy metering hubs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631FHDFB#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 RX631 Group is part of Renesas' RX family, engineered for high-performance, low-power embedded applications demanding real-time responsiveness, functional safety compliance, and rich peripheral integration - particularly in factory automation and infrastructure equipment.

FAQ

What is the maximum operating frequency and core type of the R5F5631FHDFB#V0?

The R5F5631FHDFB#V0 operates at a maximum frequency of 100 MHz and uses the 32-bit RX CPU core - a CISC Harvard-architecture design with 5-stage pipeline, variable-length instructions, and memory protection unit (MPU). It achieves 165 DMIPS performance and supports IEEE-754 single-precision floating-point operations, making it suitable for computationally intensive real-time tasks such as motor control and sensor fusion.

Does the R5F5631FHDFB#V0 include an Ethernet controller?

No, the R5F5631FHDFB#V0 does not include an Ethernet controller. It belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and associated EDMAC found in the RX63N Group. This omission reduces cost and complexity for applications that rely on other communication interfaces like USB, CAN, or SCI - confirmed in Renesas documentation R01DS0098EJ0180, Table 1.2.

What memory resources are integrated in the R5F5631FHDFB#V0?

The R5F5631FHDFB#V0 integrates 2 MB of on-chip flash memory (zero-wait-state operation at 100 MHz), 256 KB of SRAM, and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. These resources support complex firmware, real-time data buffering, and non-volatile parameter storage - all accessible without external memory components.

Which communication interfaces are supported by the R5F5631FHDFB#V0?

The R5F5631FHDFB#V0 supports USB 2.0 full-speed host/function/OTG, three CAN modules (ISO11898-1 compliant), four I²C interfaces (up to 1 Mbps), thirteen SCI channels (with asynchronous, SPI/I²C emulation, and LIN modes), three RSPI ports, and one IEBus interface. It lacks Ethernet and SDRAM controller - distinguishing it from RX63N variants.

Is the R5F5631FHDFB#V0 qualified for functional safety standards like IEC60730?

Yes, the R5F5631FHDFB#V0 includes hardware features supporting IEC60730 Class B compliance: oscillation-stop detection, CRC calculator (with selectable polynomials), independent watchdog timer (IWDT), self-diagnostic capability for the 10-bit A/D converter, and clock frequency measurement. These reduce software validation effort and enable robust failure detection in safety-critical embedded systems.