Renesas R5F5631BDDBG#U0

Overview

R5F5631BDDBG#U0 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 function-only interface, CAN v2.0B (2 channels), and operates from a single 2.7–3.6 V supply across –40 to +85°C.

For engineers reviewing the R5F5631BDDBG#U0 datasheet, R5F5631BDDBG#U0 pinout, R5F5631BDDBG#U0 application, or R5F5631BDDBG#U0 equivalent, this MCU targets cost-optimized industrial control, sensor-based HMI, and USB-connected embedded devices where Ethernet is unnecessary but deterministic real-time performance, analog I/O density, and USB device functionality are critical.

Technical Context

The R5F5631BDDBG#U0 implements the RXv1 CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code. It supports IEEE-754 single-precision floating-point operations and includes a memory protection unit (MPU) for secure execution environments.

Its peripheral set excludes Ethernet MAC and SDRAM controller-distinguishing it from RX63N variants-but retains full USB 2.0 function-mode capability, dual CAN modules (32 mailboxes total), and a rich timer suite including MTU2 (6-channel), TPU (12-channel), and CMT (4-channel) units for precise waveform generation and event timing.

Key Specifications

Pinout & Package

Package: PLBG0176GA-A - 176-pin LFBGA, 13 mm × 13 mm, 0.8 mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631BDDBG#U0, the R5F5631EDDBG#U0 offers scalable memory for future firmware growth without layout change, while R5F5630BDDBG#U0 provides a lower-cost entry point with reduced memory-both retain identical peripheral sets, timing behavior, and thermal specs.

Availability

R5F5631BDDBG#U0 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, USB-connected sensor hubs, automotive body control units, and smart home thermostat controllers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for R5F5631BDDBG#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, and power solutions for industrial, automotive, and IoT applications.

The RX631 Group is designed for cost-conscious industrial and consumer embedded systems requiring high analog integration, USB device connectivity, and deterministic real-time performance without Ethernet overhead.

FAQ

What is the maximum operating frequency of the R5F5631BDDBG#U0?

The R5F5631BDDBG#U0 operates at a maximum system clock frequency of 100 MHz, delivering 165 DMIPS performance. This speed is sustained across its full operating temperature range (–40 to +85°C) and supply voltage (2.7–3.6 V), with zero-wait-state access to both 512 KB flash and 64 KB SRAM. The R5F5631BDDBG#U0 achieves this using an internal PLL locked to an external 4–16 MHz crystal or ceramic resonator.

Does the R5F5631BDDBG#U0 include an Ethernet MAC controller?

No, the R5F5631BDDBG#U0 does not include an Ethernet MAC controller. It belongs to the RX631 Group, which explicitly omits Ethernet functionality-unlike the RX63N Group. This omission reduces silicon cost and power consumption, making the R5F5631BDDBG#U0 ideal for applications where USB, CAN, or serial connectivity suffices. All other major peripherals-including USB 2.0 function mode, dual CAN, and 21-channel 12-bit ADC-are fully retained in the R5F5631BDDBG#U0.

What package type and pin count does the R5F5631BDDBG#U0 use?

The R5F5631BDDBG#U0 uses the PLBG0176GA-A package: a 176-pin Low-Profile Fine-Pitch Ball Grid Array measuring 13 mm × 13 mm with 0.8 mm ball pitch. This package supports 133 general-purpose I/O pins (18 of which are 5-V tolerant), dedicated power/ground balls per I/O bank, and thermal pad for enhanced heat dissipation. The R5F5631BDDBG#U0 shares this exact mechanical footprint with other RX631 Group devices in the same package variant.

How many A/D and D/A converter channels does the R5F5631BDDBG#U0 integrate?

The R5F5631BDDBG#U0 integrates two independent A/D converters: a 12-bit unit with 21 input channels (AN000–AN020) and a 10-bit unit with 8 input channels (AN0–AN7). It also includes two 10-bit voltage-output D/A converters (DA0 and DA1). All analog peripherals share common reference voltage inputs (VREFH/VREFL) and support hardware-triggered conversions via timers or external signals-enabling synchronized multi-channel acquisition in the R5F5631BDDBG#U0.

Is the R5F5631BDDBG#U0 supported by Renesas' E2 studio and CS+ development tools?

Yes, the R5F5631BDDBG#U0 is fully supported by Renesas' E2 studio IDE and CS+ integrated development environment. Both tools provide compiler, debugger, and flash programmer support for the RX631 Group, including device-specific startup code, peripheral register views, and real-time trace capabilities via JTAG or FINE interfaces. Renesas supplies dedicated device files and example projects for the R5F5631BDDBG#U0, ensuring seamless integration into existing RX ecosystem workflows.