Renesas R5F5631FDGFC#V0

Overview

R5F5631FDGFC#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 165 DMIPS performance, 2 MB on-chip flash memory, 256 KB SRAM, and full-speed USB 2.0 host/function interface. It lacks Ethernet MAC and SDRAM controller-distinguishing it from the RX63N Group-and targets cost-optimized industrial control and HMI applications requiring deterministic real-time response.

For engineers reviewing the R5F5631FDGFC#V0 datasheet, R5F5631FDGFC#V0 pinout, R5F5631FDGFC#V0 application, or R5F5631FDGFC#V0 equivalent, key selection criteria include its 176-pin LQFP (PLQP0176KB-A) package, -40 to +85°C operating range, absence of Ethernet/SDRAM support, and inclusion of CAN, 13 SCI channels, 4 I²C interfaces, and dual 10-bit D/A converters.

Technical Context

The R5F5631FDGFC#V0 implements the RX CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code. It integrates a single-precision IEEE-754 FPU, two multiply-accumulate units, and a 32-bit multiplier executing in one cycle-enabling efficient motor control and sensor fusion algorithms.

Its peripheral set includes three CAN modules (ISO 11898-1 compliant), up to 13 SCI channels supporting asynchronous, SPI-like, and I²C-like modes, and a 12-bit A/D converter with 21 channels and sample-and-hold. The device supports four low-power modes and operates from a single 2.7–3.6 V supply with 500 µA/MHz active current consumption.

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 R5F563NFDGFC#V0, the R5F5631FDGFC#V0 omits Ethernet and SDRAM to reduce cost and power-ideal for standalone control. Versus R5F566TEBDFP#V0, it trades higher clock speed and motor-specific peripherals for broader general-purpose I/O and USB connectivity in the same footprint family.

Availability

R5F5631FDGFC#V0 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, smart energy meters, HMI controllers, and motor drive control boards requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability validation.

Supply support for R5F5631FDGFC#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 industrial, automotive, and IoT markets.

The RX631 Group was designed for cost-sensitive, high-integration embedded applications where Ethernet is unnecessary-emphasizing rich analog/mixed-signal capability, real-time determinism, and functional safety support.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631FDGFC#V0?

The R5F5631FDGFC#V0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core-a CISC Harvard architecture with 5-stage pipeline and variable-length instructions. Its 165 DMIPS performance and single-cycle 32-bit multiplier make it suitable for real-time control tasks. The R5F5631FDGFC#V0 does not include an Ethernet MAC, distinguishing it from the RX63N Group.

Does the R5F5631FDGFC#V0 support USB functionality, and what modes are available?

Yes, the R5F5631FDGFC#V0 integrates a full-speed USB 2.0 host/function module supporting host, function, and OTG operation at 12 Mbps. It includes an on-chip transceiver and 2 KB RAM buffer, enabling direct connection to USB peripherals without external PHY. The R5F5631FDGFC#V0 supports both self-powered and bus-powered configurations, with VBUS sensing for automatic role negotiation.

How much on-chip memory does the R5F5631FDGFC#V0 provide, and what are its access characteristics?

The R5F5631FDGFC#V0 features 2 MB of on-chip flash memory with zero wait-state operation at 100 MHz, 256 KB of SRAM also with zero wait states, and 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. All memory blocks are accessible by the CPU and DMA controllers without performance penalty, enabling deterministic real-time execution critical for industrial control. This configuration is fixed for the R5F5631FDGFC#V0 variant.

What analog peripherals are integrated into the R5F5631FDGFC#V0, and how are they configured?

The R5F5631FDGFC#V0 integrates a 12-bit A/D converter with 21 input channels and sample-and-hold, a separate 10-bit A/D converter with 8 channels, and two independent 10-bit D/A converters. Conversion can be triggered by software, timer events (MTU2/TPU/TMR), or external signals. The on-die temperature sensor feeds into the 12-bit A/D, providing ±1°C accuracy for thermal monitoring-key for R5F5631FDGFC#V0-based motor or power supply designs.

Is the R5F5631FDGFC#V0 pin-compatible with other RX63x devices, and what package does it use?

The R5F5631FDGFC#V0 uses the PLQP0176KB-A package: a 176-pin LQFP with 24 × 24 mm body and 0.5 mm pitch. It shares pinout compatibility with other RX631 Group devices in the same package (e.g., R5F563NFDGFC#V0), but differs from RX63N variants that include Ethernet pins. Pin functions are defined in the R01DS0098EJ0180 datasheet, and the R5F5631FDGFC#V0 requires dedicated power sequencing and decoupling per Renesas layout recommendations.