Renesas R5F5631DDDBG#U0

Overview

R5F5631DDDBG#U0 from Renesas is a 100 MHz 32-bit RX CPU core microcontroller in the RX631 Group, featuring 1.5 Mbytes of on-chip flash memory, 128 Kbytes of SRAM, and 32 Kbytes of data flash. It integrates a 12-bit A/D converter (21 channels), 10-bit A/D converter (8 channels), dual 10-bit D/A converters, Ethernet MAC (not present - RX631 Group excludes Ethernet), USB 2.0 host/function interface, CAN (2 channels), and real-time clock. It targets industrial control and networked embedded systems requiring deterministic timing and IEC60730 compliance.

For engineers reviewing the R5F5631DDDBG#U0 datasheet, R5F5631DDDBG#U0 pinout, R5F5631DDDBG#U0 application, or R5F5631DDDBG#U0 equivalent, key selection criteria include its 100 MHz operation with 165 DMIPS, 1.5 Mbyte flash capacity, 128 Kbyte SRAM, absence of Ethernet controller (RX631-specific), and LFBGA-176 package with -40 to +85°C temperature range.

Technical Context

The R5F5631DDDBG#U0 implements the CISC Harvard architecture RX CPU with 5-stage pipeline, supporting IEEE-754 single-precision floating-point operations and two multiply-and-accumulate units. Its memory subsystem includes no-wait-state 100 MHz flash and SRAM, plus background-programmable 32 Kbyte data flash.

It features a comprehensive peripheral set including three CAN modules (2 active in this variant), up to 13 SCI channels (configured per package), four I²C interfaces (one FM+), three RSPI channels, and dedicated hardware accelerators for CRC and AES encryption (DEU). Clock management supports multiple oscillators (HOCO/LOCO/subclock) and PLL-based frequency synthesis.

Key Specifications

Pinout & Package

Package: PLBG0176GA-A - 176-pin Low-Profile Fine-Pitch Ball Grid Array, 13 × 13 mm body, 0.8 mm ball pitch, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631DDDBG#U0, the R5F563NDDDBG#U0 adds Ethernet and 512 Kbyte more flash but increases design complexity, while the R5F5630EDDBG#U0 reduces memory and security features to lower cost - making R5F5631DDDBG#U0 the optimal balance for mid-tier industrial controllers requiring USB, CAN, and cryptographic capabilities without Ethernet overhead.

Availability

R5F5631DDDBG#U0 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy meters, building automation gateways, and factory asset monitors requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for R5F5631DDDBG#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 enterprise markets.

The RX631 Group is designed for high-performance, safety-aware industrial control applications - emphasizing real-time determinism, functional safety (IEC60730), and rich connectivity (USB, CAN, multiple SCI) without Ethernet overhead.

FAQ

What is the maximum operating frequency and performance rating of the R5F5631DDDBG#U0?

The R5F5631DDDBG#U0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS (Dhrystone MIPS) performance. This is achieved through its optimized 32-bit RX CPU core with 5-stage pipeline, single-cycle 32×32 multiplier, and hardware floating-point unit. The R5F5631DDDBG#U0 sustains this performance with zero-wait-state execution from both flash and SRAM, enabling deterministic real-time response in demanding control applications.

Does the R5F5631DDDBG#U0 include an Ethernet controller?

No, the R5F5631DDDBG#U0 does not include an Ethernet controller. It 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 (R01DS0098EJ0180), where Table 1.2 shows "Ethernet controller" as "Not available" for all RX631 packages, including the PLBG0176GA-A used by R5F5631DDDBG#U0.

What are the memory resources available on the R5F5631DDDBG#U0?

The R5F5631DDDBG#U0 integrates 1.5 Mbytes of on-chip flash memory, 128 Kbytes of SRAM, and 32 Kbytes of reprogrammable data flash. Flash supports background programming/erasing (BGO), and both flash and SRAM operate at full 100 MHz with zero wait states. The data flash endurance is rated for 100,000 write/erase cycles, making it suitable for parameter storage and firmware update staging in the R5F5631DDDBG#U0.

Which communication interfaces are supported by the R5F5631DDDBG#U0?

The R5F5631DDDBG#U0 supports USB 2.0 full-speed host/function/OTG (1 port), CAN (2 channels, ISO 11898-1 compliant), up to 13 SCI channels (with UART, SPI, I²C, LIN, and smart-card modes), 4 I²C interfaces (including one FM+), 3 RSPI channels, and IEBus. It does not support Ethernet or external bus expansion in this package configuration. These interfaces enable robust connectivity in industrial control, metering, and gateway applications using the R5F5631DDDBG#U0.

What safety and security features does the R5F5631DDDBG#U0 provide?

The R5F5631DDDBG#U0 includes hardware support for IEC60730 Class B compliance, featuring oscillation-stop detection, CRC calculator (with three polynomials), self-diagnostic A/D functions, independent watchdog timer (IWDT) with dedicated LOCO clock, and memory protection unit (MPU). It also integrates a Data Encryption Unit (DEU) supporting AES-128/192/256 encryption/decryption in ECB/CBC modes - critical for secure boot and firmware authentication in the R5F5631DDDBG#U0.