Renesas R5F5631WDGFB#V0

Overview

R5F5631WDGFB#V0 from Renesas is a 100 MHz 32-bit RX CPU core microcontroller in the RX631 Group, featuring 768 KB on-chip flash memory, 128 KB SRAM, 32 KB data flash, and integrated 12-bit/10-bit A/D converters, 10-bit D/A converters, RTC, and CAN interface - designed for industrial control and networked embedded systems requiring deterministic real-time performance and functional safety support.

For engineers reviewing the R5F5631WDGFB#V0 datasheet, R5F5631WDGFB#V0 pinout, R5F5631WDGFB#V0 application, or R5F5631WDGFB#V0 equivalent, this page delivers verified specifications, package mapping to PLQP0144KA-A (144-pin LQFP), confirmed peripheral channel counts per package, IEC60730-compliant features, and validated alternative parts for migration or second-sourcing decisions.

Technical Context

The R5F5631WDGFB#V0 implements the RXv1 CPU core with Harvard architecture, 5-stage pipeline, and IEEE-754 single-precision FPU - delivering 165 DMIPS at 100 MHz. It supports little-endian or big-endian data arrangement and includes a memory protection unit (MPU) for secure task isolation.

It operates from a single 2.7–3.6 V supply with four low-power modes, RTC battery backup (VBATT = 2.3–3.6 V), and on-chip oscillators (125 kHz LOCO, 50 MHz HOCO). Unlike RX63N variants, it excludes Ethernet MAC and SDRAM controller but retains full USB 2.0 host/function/OTG, three CAN channels (ISO 11898-1), and up to 13 SCI interfaces.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631WDGFB#V0, R5F5631EDDFB#V0 offers scalable memory for complex connectivity stacks, while R5F5630WDDFB#V0 reduces BOM cost by omitting USB and DEU - making the R5F5631WDGFB#V0 optimal for balanced industrial edge nodes needing USB commissioning and secure firmware integrity.

Availability

R5F5631WDGFB#V0 is available at Aetrix Electronics and suitable for industrial automation, building management systems, medical device controllers, and energy metering terminals requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F5631WDGFB#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 targets cost-optimized industrial and consumer embedded systems requiring real-time determinism, functional safety features, and rich peripheral integration - without Ethernet or SDRAM overhead.

FAQ

What is the maximum operating frequency and core type of the R5F5631WDGFB#V0?

The R5F5631WDGFB#V0 features a 32-bit RXv1 CPU core with a maximum operating frequency of 100 MHz, achieving 165 DMIPS performance. It uses a Harvard architecture with 5-stage pipeline and supports IEEE-754 single-precision floating-point operations. This core enables deterministic real-time execution critical for industrial control loops and safety-critical functions within the R5F5631WDGFB#V0.

Does the R5F5631WDGFB#V0 include an Ethernet MAC or SDRAM controller?

No, the R5F5631WDGFB#V0 belongs to the RX631 Group and explicitly excludes Ethernet MAC and SDRAM controller functionality - unlike RX63N variants. Its external bus interface supports only 16-bit parallel expansion (CS areas) without SDRAM area control. This distinction is confirmed in Table 1.2 of the official datasheet R01DS0098EJ0180, making the R5F5631WDGFB#V0 appropriate for non-networked edge nodes where cost and power efficiency outweigh Ethernet requirements.

What package type and pin count does the R5F5631WDGFB#V0 use?

The R5F5631WDGFB#V0 is packaged in PLQP0144KA-A: a 144-pin LQFP measuring 20 × 20 mm with 0.5 mm pitch. This package provides 111 general-purpose I/O pins, 18 of which are 5-V tolerant, and supports all on-chip peripherals including USB 2.0, CAN, SCI, and RIIC. The pinout is fully documented in Section 1.2 and Figure 1.1 of the R01DS0098EJ0180 datasheet for the R5F5631WDGFB#V0.

How does the R5F5631WDGFB#V0 support IEC60730 functional safety compliance?

The R5F5631WDGFB#V0 integrates multiple hardware features for IEC60730 Class B compliance: oscillation-stop detection, CRC calculator (with three polynomials), independent watchdog timer (IWDT) with dedicated LOCO clock, A/D converter self-diagnostic, and register write protection. These are implemented in silicon and verified per Renesas' safety manual R01UL0079EJ0100, enabling certified firmware development without external safety monitors - a key capability of the R5F5631WDGFB#V0.

What are the flash and RAM capacities of the R5F5631WDGFB#V0?

The R5F5631WDGFB#V0 includes 768 KB of on-chip main flash memory and 128 KB of SRAM, both operating at zero wait states up to 100 MHz. It also contains 32 KB of data flash rated for 100,000 erase/write cycles - suitable for parameter storage and firmware logging. These values are fixed for this specific part number and confirmed in Table 1.3 (List of Products) of the R01DS0098EJ0180 datasheet for the R5F5631WDGFB#V0.