Renesas R5F5631BDGFP#V0

Overview

R5F5631BDGFP#V0 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, USB 2.0 function-only interface, CAN (2 channels), and I²C (4 channels), targeting industrial HMI and motor control applications.

For engineers reviewing the R5F5631BDGFP#V0 datasheet, R5F5631BDGFP#V0 pinout, R5F5631BDGFP#V0 application, or R5F5631BDGFP#V0 equivalent, key selection criteria include its 100 MHz operation with 165 DMIPS, 512 KB flash/64 KB RAM configuration, LQFP-100 package with 78 GPIOs (17 × 5-V tolerant), and absence of Ethernet-distinguishing it from RX63N variants.

Technical Context

The R5F5631BDGFP#V0 implements the RXv1 CPU core with Harvard architecture, 5-stage pipeline, and IEEE-754 single-precision FPU. It supports little-endian data arrangement and includes MPU for memory protection, JTAG/FINE debugging interfaces, and four low-power modes including deep software standby with RTC backup.

Its clock system combines external crystal (4–16 MHz) with internal PLL, HOCO (50 MHz), and LOCO (125 kHz) oscillators. Peripheral clocks (PCLK, FCLK, BCLK) are independently configurable up to 50 MHz, while system clock (ICLK) runs at 100 MHz. The device lacks Ethernet MAC and sub-clock oscillator support-features reserved for RX63N and G-version parts.

Key Specifications

Pinout & Package

Package: PLQP0100KB-A - 100-pin LQFP, 14 × 14 mm, 0.5-mm pitch, RoHS-compliant, surface-mount.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631BDGFP#V0, R5F5631ADGFP#V0 reduces flash for cost-sensitive deployments, while R5F563NEDDFP adds Ethernet and memory at higher BOM cost and design complexity-neither is pin-compatible due to differing peripheral register maps and signal assignments.

Availability

R5F5631BDGFP#V0 is available at Aetrix Electronics and suitable for industrial HMI, BLDC motor control, smart metering gateways, and factory I/O modules requiring stable component supply across extended product lifecycles.

Supply support for R5F5631BDGFP#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 targets cost-optimized industrial control applications where Ethernet is unnecessary; R5F5631BDGFP#V0 delivers high-performance real-time processing, integrated analog, and functional safety features in a compact LQFP-100 package.

FAQ

What is the maximum operating frequency and performance rating of the R5F5631BDGFP#V0?

The R5F5631BDGFP#V0 operates at a maximum system clock frequency of 100 MHz and delivers 165 DMIPS of processing performance. This is achieved using the 32-bit RXv1 CPU core with 5-stage pipeline and single-cycle 32×32 multiplier. Its deterministic execution and zero-wait-state 512 KB flash make R5F5631BDGFP#V0 suitable for hard real-time control tasks such as motor commutation and fast-loop feedback.

Does the R5F5631BDGFP#V0 include an Ethernet controller?

No, the R5F5631BDGFP#V0 does not include an Ethernet MAC controller. It belongs to the RX631 Group, which explicitly excludes Ethernet functionality-unlike the RX63N Group. This omission reduces silicon area and cost while maintaining full USB 2.0 function, CAN, and multiple serial interfaces. Engineers selecting R5F5631BDGFP#V0 must implement network connectivity externally via USB-to-Ethernet bridges or discrete PHYs.

What are the memory resources available on the R5F5631BDGFP#V0?

The R5F5631BDGFP#V0 integrates 512 KB of on-chip flash memory with zero-wait-state access at 100 MHz, 64 KB of zero-wait-state SRAM, and 32 KB of reprogrammable data flash (rated for 100,000 erase/write cycles). These resources support complex firmware with real-time task scheduling, GUI rendering buffers, and non-volatile parameter storage-all without external memory, reducing BOM count and board space for R5F5631BDGFP#V0-based designs.

Which analog peripherals are integrated into the R5F5631BDGFP#V0?

The R5F5631BDGFP#V0 integrates a 12-bit A/D converter with 21 input channels, an 8-channel 10-bit A/D converter, two 10-bit D/A converters, and an on-die temperature sensor (±1°C accuracy). Both ADCs support software, timer-triggered, and external-event conversion starts, and include sample-and-hold circuits. The DAC outputs span 0 V to VREFH (2.7–3.6 V), enabling direct analog actuator control in R5F5631BDGFP#V0-based measurement and regulation systems.

What package type and pin count does the R5F5631BDGFP#V0 use?

The R5F5631BDGFP#V0 uses a 100-pin LQFP package (PLQP0100KB-A), measuring 14 × 14 mm with 0.5-mm pitch. It provides 78 general-purpose I/O pins, of which 17 are 5-V tolerant, plus dedicated power, ground, clock, reset, and debug interface pins. This package balances board density, thermal performance, and hand-solderability-making R5F5631BDGFP#V0 well-suited for industrial control modules where reliability and serviceability matter.