Renesas R5F5631BDDLJ#U0

Overview

R5F5631BDDLJ#U0 from Renesas is a 100 MHz 32-bit RX CPU-based microcontroller in the RX631 Group, featuring 1 MB on-chip flash memory, 128 KB SRAM, 32 KB data flash, IEEE-754 single-precision FPU, and integrated 12-bit/10-bit A/D converters. It supports USB 2.0 full-speed host/function, CAN (2 channels), up to 13 SCI interfaces, I²C (4 channels), and operates from a 2.7–3.6 V supply across –40 to +85°C.

For engineers reviewing the R5F5631BDDLJ#U0 datasheet, R5F5631BDDLJ#U0 pinout, R5F5631BDDLJ#U0 application, or R5F5631BDDLJ#U0 equivalent, this device serves as a cost-optimized, Ethernet-free alternative to the RX63N Group for industrial HMI, motor control, and networked sensor nodes requiring deterministic real-time performance, low-power operation, and IEC60730-compliant safety features.

Technical Context

The R5F5631BDDLJ#U0 implements the RXv1 CPU core with 5-stage CISC Harvard pipeline, variable-length instructions, and hardware MPU for memory protection. It executes at 165 DMIPS @ 100 MHz and integrates dual multiply-and-accumulate units plus a 32-bit multiplier completing in one cycle.

Its peripheral set excludes Ethernet MAC and SDRAM controller (distinguishing it from RX63N), but retains full USB 2.0 OTG capability, 3-channel CAN with 32 mailboxes each, parallel data capture unit (PDC), and dedicated DEU for AES-128/192/256 encryption in ECB/CBC modes - all synchronized to independent clock domains (ICLK, PCLK, FCLK, BCLK).

Key Specifications

Pinout & Package

Package: PTLG0100JA-A - 100-pin TFLGA, 7 × 7 mm, 0.65 mm pitch, 5-V-tolerant I/O (17 pins), open-drain outputs (78), internal pull-up resistors (78).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631BDDLJ#U0, R5F563NBDDBG adds Ethernet and SDRAM support at the cost of higher power and larger package, while R5F566TEBDFP trades USB/IEBus for superior motor-control peripherals and higher clock speed - making each suitable for distinct system-level requirements rather than drop-in replacement.

Availability

R5F5631BDDLJ#U0 is available at Aetrix Electronics and suitable for industrial HMI, smart motor controllers, networked sensor nodes, and energy metering gateways requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631BDDLJ#U0 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 industrial, automotive, and IoT markets.

The RX631 Group targets cost-sensitive, real-time embedded systems where Ethernet is unnecessary - delivering high CPU performance, rich analog integration, and functional safety features in compact TFLGA/LQFP packages.

FAQ

What is the maximum operating frequency and CPU performance of the R5F5631BDDLJ#U0?

The R5F5631BDDLJ#U0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS performance using the 32-bit RXv1 CPU core. Its hardware floating-point unit (FPU) complies with IEEE-754 single-precision standards, enabling efficient execution of math-intensive tasks such as motor control algorithms and sensor fusion without software emulation overhead. This performance level is sustained across the full industrial temperature range.

Does the R5F5631BDDLJ#U0 include an Ethernet controller?

No, the R5F5631BDDLJ#U0 belongs to the RX631 Group and explicitly excludes the Ethernet MAC and associated EDMAC peripheral found in the RX63N Group. This omission reduces silicon cost and power consumption, making the R5F5631BDDLJ#U0 ideal for applications where wired Ethernet is not required - such as standalone motor drives, battery-powered sensors, or USB-connected HMIs. External connectivity can be added via USB-to-Ethernet bridges or external PHYs if needed.

What memory resources are integrated into the R5F5631BDDLJ#U0?

The R5F5631BDDLJ#U0 integrates 1 MB of on-chip flash memory (zero-wait-state at 100 MHz), 128 KB of SRAM (zero-wait-state, with deep software standby backup capability), and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. The flash supports both on-board and off-board programming, and the data flash enables background operation (BGO) for concurrent execution and non-volatile parameter storage - critical for field-upgradable industrial firmware.

Which communication interfaces does the R5F5631BDDLJ#U0 support?

The R5F5631BDDLJ#U0 supports USB 2.0 full-speed host/function/OTG, 2 ISO 11898-1 CAN channels (32 mailboxes each), up to 13 SCI interfaces (including LIN-capable SCId), 4 I²C channels (one FM+), 3 RSPI channels, 1 IEBus channel, and optional PDC for parallel image sensor input. It lacks Ethernet and SDRAM interfaces - distinguishing it from the RX63N Group - but retains robust industrial connectivity for multi-protocol gateways and distributed control systems.

What safety and security features are included in the R5F5631BDDLJ#U0?

The R5F5631BDDLJ#U0 includes hardware support for IEC60730 Class B compliance: oscillation-stop detection, CRC calculator (with three polynomials), self-diagnostic A/D functionality, independent watchdog timer (IWDT) with dedicated LOCO clock, and register write protection. For security, it integrates a Data Encryption Unit (DEU) supporting AES-128/192/256 in ECB/CBC modes - enabling secure boot, encrypted firmware updates, and protected data logging without external crypto ICs.