Renesas R5F5631ECDFC#V0

Overview

R5F5631ECDFC#V0 from Renesas is a 100 MHz 32-bit RXv1 CPU-based microcontroller in the RX631 Group, featuring 2 MB on-chip flash memory, 128 KB SRAM, 32 KB data flash, IEEE-754 single-precision FPU, and integrated 10-/12-bit A/D converters - designed for industrial control systems requiring deterministic real-time response, secure firmware updates, and robust peripheral integration without Ethernet.

For engineers reviewing the R5F5631ECDFC#V0 datasheet, R5F5631ECDFC#V0 pinout, R5F5631ECDFC#V0 application, or R5F5631ECDFC#V0 equivalent, this MCU delivers verified 165 DMIPS performance, hardware CRC and AES-128/192/256 encryption (DEU), IEC60730-compliant self-diagnostic functions, and full USB 2.0 host/function/OTG support - critical for safety-certified embedded designs.

Technical Context

The R5F5631ECDFC#V0 implements the RXv1 core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It integrates a memory protection unit (MPU), JTAG/FINE debug interfaces, and supports little- or big-endian data arrangement per external bus area.

Its clock system includes main crystal oscillator (4–16 MHz), PLL for 100 MHz ICLK generation, and dedicated 125-kHz LOCO for IWDT. Power management features four low-power modes, RTC battery backup (VBATT 2.3–3.6 V), and 500 μA/MHz active current consumption at 3.3 V.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A (176-pin LQFP, 24 × 24 mm, 0.5 mm pitch). Pin count and I/O configuration match RX631 Group specification for 176-pin LQFP: 133 general-purpose I/O pins, 18 with 5-V tolerance, 133 pull-up resistors, 133 open-drain outputs, and 1 dedicated input pin.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631ECDFC#V0, the RX63N alternative adds Ethernet at the expense of higher power and design complexity, while the RX630 alternative sacrifices security, precision math, and USB flexibility to reduce cost - making R5F5631ECDFC#V0 the optimal balance for certified industrial edge devices.

Availability

R5F5631ECDFC#V0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for safety-critical production.

Supply support for R5F5631ECDFC#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 management solutions for automotive, industrial, and IoT markets.

The RX631 Group is engineered for high-integrity industrial control applications demanding real-time determinism, functional safety compliance (IEC60730), and integrated security - distinguishing it from general-purpose MCUs.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631ECDFC#V0?

The R5F5631ECDFC#V0 operates at a maximum frequency of 100 MHz using the 32-bit RXv1 CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instruction set. It achieves 165 DMIPS performance and includes a single-precision IEEE-754 floating-point unit. This architecture enables deterministic real-time execution and compact code size, validated in Renesas R01DS0098EJ0180 Rev.1.80.

Does the R5F5631ECDFC#V0 include Ethernet capability?

No, the R5F5631ECDFC#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC (ETHERC) and associated EDMAC found in the RX63N Group. Table 1.2 of R01DS0098EJ0180 confirms Ethernet is unavailable in all RX631 variants, including R5F5631ECDFC#V0. For Ethernet support, consider R5F563NEDDFC#V0 instead.

What security and safety features does the R5F5631ECDFC#V0 provide for certified applications?

The R5F5631ECDFC#V0 integrates AES-128/192/256 encryption (DEU), hardware CRC calculator, independent watchdog timer (IWDT) with dedicated LOCO clock, oscillation-stop detection, and A/D converter self-diagnostic - all documented in R01DS0098EJ0180 as IEC60730 Class B compliance enablers. These features reduce external component count and certification effort for industrial and medical devices.

What are the memory resources available on the R5F5631ECDFC#V0?

The R5F5631ECDFC#V0 includes 2 Mbytes of on-chip flash memory (100 MHz, zero-wait), 128 Kbytes of SRAM (100 MHz, zero-wait), and 32 Kbytes of reprogrammable data flash (rated for 100,000 erase/write cycles). All memory blocks support background operation (BGO) for concurrent execution and programming, as specified in R01DS0098EJ0180 Section 1.1.

Which development tools and debug interfaces are supported by the R5F5631ECDFC#V0?

The R5F5631ECDFC#V0 supports Renesas E1 and E20 debug emulators via JTAG and FINE (two-wire) interfaces. It is compatible with e2 studio IDE, CS+ (formerly CubeSuite+), and Renesas' RX Family starter kits. Debug capabilities include real-time trace, memory inspection, and breakpoint control - fully documented in R01DS0098EJ0180 Section 1. Overview and Appendix A.