Renesas R5F5631YHDFB#V0

Overview

R5F5631YHDFB#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 1 MB on-chip flash memory, 256 KB SRAM, and 32 KB data flash. It features 12-bit and 10-bit A/D converters (21 and 8 channels), dual 10-bit D/A outputs, Ethernet MAC (not present in RX631), USB 2.0 host/function/OTG, CAN, multiple SCI/I²C/SPI interfaces, and real-time clock - deployed in industrial HMI and networked sensor gateway applications.

For engineers reviewing the R5F5631YHDFB#V0 datasheet, R5F5631YHDFB#V0 pinout, R5F5631YHDFB#V0 application, or R5F5631YHDFB#V0 equivalent, key selection criteria include its 144-pin LQFP package, -40°C to +85°C operating range, absence of Ethernet controller (RX631 distinction), and support for IEC60730 safety compliance functions including CRC, self-diagnostic A/D, and oscillation-stop detection.

Technical Context

The R5F5631YHDFB#V0 implements the 32-bit RX CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code. It executes at up to 165 DMIPS and includes single-precision IEEE-754 floating-point unit, two multiply-and-accumulate units, and 32-bit multiplier with one-cycle latency.

Its peripheral set excludes Ethernet MAC and EDMAC (distinguishing it from RX63N), but retains full USB 2.0 host/function/OTG with 2 KB buffer, three CAN channels (ISO 11898-1 compliant), up to 13 SCI channels with flexible modes (asynchronous, SPI/I²C emulation), four I²C interfaces (one FM+), and parallel data capture unit (PDC) supporting image sensor interfacing via DTC/DMAC.

Key Specifications

Pinout & Package

Package: PLQP0144KA-A - 144-pin Low-profile Quad Flat Package, 20 × 20 mm body, 0.5 mm lead pitch, exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NWHDFB#V0, the R5F5631YHDFB#V0 omits Ethernet hardware to reduce cost and power, making it ideal for USB-centric gateways; versus R5F566TEHDFB#V0, it retains full USB/OTG and broader analog capability at lower clock speed - better balanced for HMI and protocol bridging.

Availability

R5F5631YHDFB#V0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart energy gateways, and networked HVAC controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631YHDFB#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-sensitive, safety-aware industrial applications - delivering high-performance 32-bit processing with integrated safety features, rich analog peripherals, and multi-protocol connectivity in compact packages.

FAQ

What is the maximum operating frequency and CPU performance of the R5F5631YHDFB#V0?

The R5F5631YHDFB#V0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS of processing performance using the 32-bit RX CPU core. Its single-precision IEEE-754 floating-point unit enables efficient real-time computation without software emulation overhead, making the R5F5631YHDFB#V0 suitable for sensor fusion and control algorithms in resource-constrained industrial systems.

Does the R5F5631YHDFB#V0 include an Ethernet controller?

No, the R5F5631YHDFB#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and EDMAC modules 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 R5F5631YHDFB#V0 retains USB 2.0 host/function/OTG, CAN, and multiple serial interfaces for alternative networked connectivity.

What package type and pin count does the R5F5631YHDFB#V0 use?

The R5F5631YHDFB#V0 uses a 144-pin LQFP package designated PLQP0144KA-A: 20 × 20 mm body size, 0.5 mm lead pitch, with exposed thermal pad. This package supports 111 general-purpose I/O pins (including 18 with 5-V tolerance), and is pin-compatible across RX631 variants sharing the same footprint - enabling scalable memory/configurations without PCB redesign.

How does the R5F5631YHDFB#V0 support functional safety standards like IEC60730?

The R5F5631YHDFB#V0 integrates multiple IEC60730 Class B compliance features: hardware CRC calculator (three polynomials), self-diagnostic A/D converter test, main clock oscillation-stop detection, independent watchdog timer (IWDT) with dedicated LOCO clock, and memory protection unit (MPU). These features are documented in the R01DS0098EJ0180 datasheet and enable certified safety firmware implementation without external components - a key advantage of the R5F5631YHDFB#V0 in appliance and industrial controls.

What are the flash and RAM capacities of the R5F5631YHDFB#V0?

The R5F5631YHDFB#V0 includes 1 MB of on-chip main flash memory (with zero wait states at 100 MHz), 256 KB of SRAM (also zero wait states), and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. This memory configuration supports complex real-time OS deployments, local data logging, and over-the-air firmware updates - all within the R5F5631YHDFB#V0's integrated silicon.