Renesas R5F5631PCDFL#V0

Overview

R5F5631PCDFL#V0 from Renesas is a 100 MHz 32-bit RX CPU core microcontroller in the RX631 Group, featuring 512 KB on-chip flash memory, 64 KB SRAM, and no Ethernet controller. It integrates a 12-bit A/D converter (21 channels), 10-bit A/D converter (8 channels), dual 10-bit D/A converters, RTC with battery backup, USB 2.0 full-speed host/function interface, CAN (2 channels), 13 SCI interfaces, 4 I²C buses, and AES encryption (DEU). It targets industrial HMI, motor control, and smart sensor nodes requiring deterministic real-time performance and functional safety support.

For engineers reviewing the R5F5631PCDFL#V0 datasheet, R5F5631PCDFL#V0 pinout, R5F5631PCDFL#V0 application, or R5F5631PCDFL#V0 equivalent, this page delivers verified specifications, package mapping to PLQP0176KB-A (176-pin LQFP), confirmed peripheral channel counts per package, exact flash/SRAM/E2 capacities, and two validated alternative parts for design continuity.

Technical Context

The R5F5631PCDFL#V0 implements the RXv1 CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It supports IEEE-754 single-precision floating-point arithmetic and includes two multiply-and-accumulate units - one optimized for register-to-register operations and another for memory-to-memory data paths.

Its clock system integrates PLL, internal 50-MHz HOCO and 125-kHz LOCO oscillators, and external crystal support (4–16 MHz), with independent frequency division for ICLK (up to 100 MHz), PCLK (up to 50 MHz), FCLK (up to 50 MHz), and BCLK (up to 50 MHz). The device lacks Ethernet MAC and SDRAM controller - distinguishing it from RX63N variants - and omits sub-clock oscillator and battery-backed RTC in D-version configurations.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A - 176-pin LQFP, 24 × 24 mm, 0.5 mm pitch, RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631PCDFL#V0, R5F5631EDDFC offers identical feature set with updated silicon revision, while R5F5630ADDFC removes USB and DEU to reduce BOM cost - making it suitable only where those peripherals are unused.

Availability

R5F5631PCDFL#V0 is available at Aetrix Electronics and suitable for industrial HMI, motor control, building automation, and medical diagnostic equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631PCDFL#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 designed for cost-optimized, high-performance embedded applications demanding real-time responsiveness, functional safety features (IEC 60730), and rich analog/peripheral integration - without Ethernet or SDRAM requirements.

FAQ

What is the maximum operating frequency and core type of the R5F5631PCDFL#V0?

The R5F5631PCDFL#V0 operates at a maximum frequency of 100 MHz and uses the 32-bit RXv1 CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions. This core delivers 165 DMIPS performance and supports IEEE-754 single-precision floating-point operations - critical for real-time motor control and signal processing tasks executed by the R5F5631PCDFL#V0.

Does the R5F5631PCDFL#V0 include an Ethernet controller?

No, the R5F5631PCDFL#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and associated EDMAC peripheral found 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 R5F5631PCDFL#V0 instead emphasizes USB 2.0, CAN, and rich analog integration for non-networked embedded control applications.

What are the flash and RAM capacities of the R5F5631PCDFL#V0?

The R5F5631PCDFL#V0 integrates 512 KB of on-chip main flash memory and 64 KB of on-chip SRAM, both operating at zero wait states up to 100 MHz. These capacities are fixed for this specific part number and align with Table 1.2 of the RX63N/RX631 datasheet, which confirms 512 KB flash and 64 KB RAM for RX631 devices in 176-pin LQFP packages - matching the PLQP0176KB-A footprint of the R5F5631PCDFL#V0.

Which package type does the R5F5631PCDFL#V0 use?

The R5F5631PCDFL#V0 uses the PLQP0176KB-A package: a 176-pin LQFP measuring 24 × 24 mm with 0.5 mm pin pitch. This package is explicitly listed in the RX63N/RX631 datasheet (R01DS0098EJ0180) for RX631 Group parts including R5F5631x series variants, and supports all I/O functions specified for the 176-pin configuration - such as 133 general-purpose I/O pins, 5-V tolerant inputs, and open-drain outputs.

Does the R5F5631PCDFL#V0 support USB On-The-Go (OTG)?

Yes, the R5F5631PCDFL#V0 includes a USB 2.0 host/function module compliant with the USB 2.0 specification and capable of OTG operation. Its USB interface supports full-speed (12 Mbps) transfer, self- and bus-powered modes, and uses an integrated transceiver with 2 KB on-chip RAM buffer - enabling the R5F5631PCDFL#V0 to act as either host or peripheral depending on VBUS and ID pin states.