Renesas R5F5631DDGFC#V0

Overview

R5F5631DDGFC#V0 from Renesas is a 100 MHz 32-bit RX CPU-based microcontroller in the RX631 Group, featuring 1.5 Mbytes of on-chip flash memory, 192 Kbytes of SRAM, and 32 Kbytes of data flash. It integrates a 12-bit A/D converter (21 channels), 10-bit A/D converter (8 channels), dual 10-bit D/A converters, Ethernet MAC (not present in RX631 Group), USB 2.0 host/function/OTG, CAN, multiple SCI/I²C/RSPI interfaces, and hardware AES encryption. It targets industrial control systems requiring deterministic real-time response, secure firmware updates, and multi-protocol connectivity.

For engineers reviewing the R5F5631DDGFC#V0 datasheet, R5F5631DDGFC#V0 pinout, R5F5631DDGFC#V0 application, or R5F5631DDGFC#V0 equivalent, this MCU delivers verified 100 MHz operation with IEEE-754 FPU, 165 DMIPS performance, low-power modes down to 500 μA/MHz, and IEC60730-compliant safety features including CRC, self-diagnostic A/D, and oscillation-stop detection - critical for functional safety certification in motor drives and PLCs.

Technical Context

The R5F5631DDGFC#V0 implements the CISC Harvard-architecture RX CPU core with 5-stage pipeline, variable-length instructions, and MPU support. It executes single-precision floating-point operations per IEEE-754 and includes two multiply-and-accumulate units plus a 32-bit multiplier (1-cycle) and divider (2-cycle).

Its clock system combines external crystal oscillator (4–16 MHz), internal HOCO (50 MHz), LOCO (125 kHz), and PLL for flexible domain clocking: ICLK up to 100 MHz, PCLK up to 50 MHz, FCLK/BCLK up to 50 MHz. The device supports four low-power modes - Sleep, All-module Clock Stop, Software Standby, and Deep Software Standby - with RTC battery backup capability.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A (176-pin LQFP, 24 × 24 mm, 0.5-mm pitch). Pinout validated per Renesas R01DS0098EJ0180 Rev.1.80, Table 1.2 and Figure 1.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NDDDFC, the R5F5631DDGFC#V0 omits Ethernet but retains identical flash/SRAM, USB/CAN/SCI count, and safety features - making it ideal for cost-sensitive non-Ethernet PLC modules. Against R5F566TDDFG#V0, it trades higher clock speed and servo-specific timers for integrated AES and broader analog channel support, better suiting secure HMI or gateway roles.

Availability

R5F5631DDGFC#V0 is available at Aetrix Electronics and suitable for industrial motor drives, programmable logic controllers, secure IoT gateways, and human-machine interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631DDGFC#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 automotive, industrial, and IoT markets.

The RX631 Group is designed for cost-optimized industrial automation applications demanding real-time performance, functional safety compliance, and multi-protocol connectivity - without requiring Ethernet PHY integration.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631DDGFC#V0?

The R5F5631DDGFC#V0 operates at a maximum frequency of 100 MHz and uses the 32-bit RX CPU core with a 5-stage pipeline, Harvard architecture, and variable-length instruction set. It achieves 165 DMIPS and includes a single-precision IEEE-754 floating-point unit, two multiply-and-accumulate units, and a 32-bit multiplier with one-cycle execution. This architecture enables deterministic real-time execution for industrial control loops.

Does the R5F5631DDGFC#V0 include an Ethernet MAC controller?

No, the R5F5631DDGFC#V0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC controller. That feature is reserved for the RX63N Group (e.g., R5F563NDDDFC). The R5F5631DDGFC#V0 retains full USB 2.0 host/function/OTG, CAN, multiple SCI/I²C/RSPI interfaces, and IEBus - making it suitable for non-Ethernet industrial networks where cost and power efficiency are prioritized.

What memory resources are integrated into the R5F5631DDGFC#V0?

The R5F5631DDGFC#V0 integrates 1.5 Mbytes of on-chip flash memory (executed at 100 MHz with zero wait states), 192 Kbytes of SRAM (also zero-wait), and 32 Kbytes of reprogrammable data flash rated for 100,000 write/erase cycles. The flash supports on-board programming via SWD/FINE, and the SRAM includes backup capability during deep software standby mode - essential for retaining state in battery-backed applications.

How does the R5F5631DDGFC#V0 support functional safety standards like IEC60730?

The R5F5631DDGFC#V0 includes dedicated hardware features for IEC60730 Class B compliance: oscillation-stoppage detection for main/subclocks, built-in CRC calculator (with three polynomials), independent watchdog timer (IWDT) with dedicated LOCO clock, self-diagnostic capability for the 10-bit A/D converter, and register write protection. These eliminate the need for external safety monitors in many industrial control designs.

What is the package type and pin count of the R5F5631DDGFC#V0?

The R5F5631DDGFC#V0 is packaged in a 176-pin LQFP (PLQP0176KB-A) measuring 24 × 24 mm with 0.5-mm pitch. It provides 133 general-purpose I/O pins (17 of which are 5-V tolerant), along with dedicated pins for reset, clock inputs, USB D+/D−, CAN H/L, and multiple peripheral function multiplexing - validated per Renesas datasheet R01DS0098EJ0180.