Renesas R5F5631GDDFB#V0

Overview

R5F5631GDDFB#V0 from Renesas is a 100 MHz, 32-bit RX CPU core microcontroller in the RX631 Group, featuring 128 KB SRAM, 2 MB on-chip flash memory (no wait states), 12-bit and 10-bit A/D converters (21 + 8 channels), dual 10-bit D/A outputs, Ethernet MAC support absent (RX631-specific), and operation over −40 to +105°C. It targets industrial control systems requiring deterministic real-time response, secure firmware updates, and multi-protocol connectivity without Ethernet PHY dependency.

For engineers reviewing the R5F5631GDDFB#V0 datasheet, R5F5631GDDFB#V0 pinout, R5F5631GDDFB#V0 application, or R5F5631GDDFB#V0 equivalent, this device delivers verified IEEE 754 single-precision FPU performance (165 DMIPS), AES-128/192/256 encryption via DEU, IEC60730-compliant self-diagnostic features, and full-speed USB 2.0 host/function/OTG with integrated transceiver - all in a 144-pin LQFP package with 5-V-tolerant I/Os.

Technical Context

The R5F5631GDDFB#V0 implements the CISC Harvard-architecture RX CPU core with 5-stage pipeline, variable-length instructions, and MPU-enforced memory protection. It executes at 100 MHz with 1-cycle 32×32-bit multiply and 2-cycle divide, supports little/big-endian data arrangement, and integrates JTAG/FINE debugging interfaces.

Its peripheral set includes three CAN modules (ISO 11898-1 compliant, 32 mailboxes each), up to 13 SCI channels (with UART, SPI, I²C, LIN, smart-card modes), four RIIC interfaces (1 Mbps max), three RSPI controllers, and a 128-Mbyte SDRAM interface - all clocked independently via configurable PCLK, BCLK, and FCLK domains.

Key Specifications

Pinout & Package

Package: PLQP0144KA-A - 144-pin LQFP, 20 × 20 mm, 0.5-mm pitch, RoHS-compliant, with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NEDDFB, R5F5631GDDFB#V0 removes Ethernet hardware to reduce EMI sensitivity and simplify layout, while retaining identical USB, CAN, and crypto capabilities; versus R5F566TDDFP, it trades higher clock speed for broader peripheral coverage and integrated security - making it optimal for secure, multi-interface industrial edge nodes.

Availability

R5F5631GDDFB#V0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and building management systems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability under extended temperature conditions.

Supply support for R5F5631GDDFB#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, and power solutions for industrial, automotive, and IoT markets.

The RX631 Group is designed for high-integrity industrial applications demanding real-time determinism, functional safety compliance (IEC60730), and secure firmware execution - with R5F5631GDDFB#V0 delivering balanced performance, peripheral richness, and extended-temperature operation.

FAQ

What is the maximum operating frequency and CPU architecture of the R5F5631GDDFB#V0?

The R5F5631GDDFB#V0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core - a CISC Harvard architecture with 5-stage pipeline, variable-length instructions, and 165 DMIPS performance. It supports IEEE 754 single-precision floating-point operations, 32×32-bit multiplication in one cycle, and division in two cycles - enabling deterministic real-time control in industrial applications.

Does the R5F5631GDDFB#V0 include an Ethernet MAC controller?

No, the R5F5631GDDFB#V0 belongs to the RX631 Group, which excludes the Ethernet MAC and associated EDMAC peripherals present in the RX63N Group. This omission reduces pin count, power consumption, and layout complexity for applications that rely on external Ethernet PHYs or alternative connectivity such as CAN, USB, or RS-485 - confirmed in Renesas document R01DS0098EJ0180, Table 1.2.

What are the memory resources available on the R5F5631GDDFB#V0?

The R5F5631GDDFB#V0 integrates 2 Mbytes of on-chip flash memory (zero-wait-state access at 100 MHz), 128 Kbytes of on-chip SRAM (also zero-wait-state), and 32 Kbytes of reprogrammable data flash rated for 100,000 erase/write cycles. These resources support complex firmware, real-time data buffering, and secure parameter storage - all within a single-chip solution.

How does the R5F5631GDDFB#V0 support functional safety standards like IEC60730?

The R5F5631GDDFB#V0 includes hardware features required for Class B compliance: oscillation-stoppage detection, independent watchdog timer (IWDT) with dedicated LOCO clock, CRC calculator (supporting X8/X16 polynomials), self-diagnostic A/D converter test, and memory protection unit (MPU). These are documented in Renesas' R01DS0098EJ0180 and enable certified safety routines without external components.

What is the operating temperature range and package type of the R5F5631GDDFB#V0?

The R5F5631GDDFB#V0 is a G-version device rated for −40 to +105°C operation and housed in a PLQP0144KA-A package: a 144-pin LQFP measuring 20 × 20 mm with 0.5-mm pitch and RoHS-compliant finish. Its 5-V-tolerant I/Os and dedicated VREFH/AVCC0 pins ensure robust analog performance across the full temperature range.