Renesas R5F5631KDGFC#V0

Overview

R5F5631KDGFC#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 1.5 MB on-chip flash memory, 192 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 interface, CAN, multiple SCI/I²C/RSPI interfaces, and operates from a single 2.7–3.6 V supply across –40 to +85°C. It targets industrial control and networked embedded systems requiring deterministic real-time performance and secure firmware execution.

For engineers reviewing the R5F5631KDGFC#V0 datasheet, R5F5631KDGFC#V0 pinout, R5F5631KDGFC#V0 application, or R5F5631KDGFC#V0 equivalent, this page delivers verified technical context, package mapping, functional specifications, and validated alternative options - all grounded in Renesas' official R01DS0098EJ0180 Rev.1.80 documentation for the RX631 Group.

Technical Context

The R5F5631KDGFC#V0 implements the 32-bit RX CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It supports IEEE-754 single-precision floating-point arithmetic and includes two multiply-and-accumulate units plus a 32-bit multiplier executing in one cycle and a divider in two cycles.

It integrates a memory protection unit (MPU), JTAG/FINE debugging interfaces, and four low-power modes (sleep, all-module clock stop, software standby, deep software standby). The device lacks Ethernet MAC and SDRAM controller - distinguishing it from RX63N variants - and omits RTC and battery backup functions per RX631 Group specification.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A - 176-pin LQFP, 24 × 24 mm body, 0.5 mm pitch, exposed pad (thermal pad not electrically connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NKHDFC#V0, the R5F5631KDGFC#V0 removes Ethernet and RTC to reduce gate count and power, making it optimal for non-networked industrial controllers. Against R5F5630KDGFC#V0, it adds 64 KB SRAM, FPU, and AES-DEU - critical for advanced motion control and secure firmware deployment.

Availability

R5F5631KDGFC#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 traceable sourcing.

Supply support for R5F5631KDGFC#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 is designed for high-performance, secure, and energy-efficient industrial control applications - emphasizing real-time determinism, functional safety support (IEC60730), and integrated security primitives like AES and CRC.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631KDGFC#V0?

The R5F5631KDGFC#V0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instruction set. It delivers 165 DMIPS and includes hardware support for IEEE-754 single-precision floating-point operations - essential for real-time signal processing in industrial applications where the R5F5631KDGFC#V0 serves as the primary control engine.

Does the R5F5631KDGFC#V0 include an Ethernet MAC controller?

No, the R5F5631KDGFC#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and associated EDMAC peripheral. This omission distinguishes it from the RX63N Group (e.g., R5F563NKHDFC#V0). The R5F5631KDGFC#V0 retains full USB 2.0 host/function, CAN, multiple SCI/I²C/RSPI interfaces, and 12-bit A/D - making it ideal for non-Ethernet industrial controllers where the R5F5631KDGFC#V0 balances performance, security, and cost.

What are the memory resources available on the R5F5631KDGFC#V0?

The R5F5631KDGFC#V0 integrates 1.5 MB of on-chip flash memory (zero-wait-state at 100 MHz), 192 KB of SRAM (zero-wait-state), and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. These resources support complex firmware with real-time OS, secure boot, and data logging - all while maintaining deterministic execution critical for applications relying on the R5F5631KDGFC#V0 as the central processing unit.

Which package type and pin count does the R5F5631KDGFC#V0 use?

The R5F5631KDGFC#V0 uses the PLQP0176KB-A package: a 176-pin LQFP with 24 × 24 mm body size and 0.5 mm pitch. It provides 133 general-purpose I/O pins, 18 of which are 5-V tolerant, supporting direct interfacing with industrial-level sensors and actuators - a key mechanical and electrical specification confirmed for the R5F5631KDGFC#V0 in Renesas' official documentation.

Does the R5F5631KDGFC#V0 support real-time clock (RTC) functionality?

No, RTC is not implemented in the RX631 Group. Table 1.2 of the R01DS0098EJ0180 datasheet confirms RTC availability only in RX63N devices. The R5F5631KDGFC#V0 omits RTC, battery backup (VBATT), and sub-clock oscillator - simplifying power design for applications where time-of-day tracking is handled externally or not required. This architectural choice reinforces the R5F5631KDGFC#V0's focus on deterministic control rather than timekeeping.