Renesas R5F5631DCDLC#U0

Overview

R5F5631DCDLC#U0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller featuring a single-precision IEEE-754 FPU, 1.5 Mbytes of on-chip flash memory, 128 Kbytes of SRAM, and integrated 12-bit/10-bit A/D converters. It supports USB 2.0 full-speed host/function, CAN (2 channels), up to 13 SCI interfaces, and operates from a 2.7–3.6 V supply across –40 to +85°C. It targets industrial HMI, motor control, and networked sensor nodes requiring deterministic real-time performance without Ethernet.

For engineers reviewing the R5F5631DCDLC#U0 datasheet, R5F5631DCDLC#U0 pinout, R5F5631DCDLC#U0 application, or R5F5631DCDLC#U0 equivalent, key selection criteria include its 1.5 Mbyte flash capacity, dual A/D converter resolution (12-bit + 10-bit), absence of Ethernet MAC (distinguishing it from RX63N), 176-pin LQFP package with 133 I/O pins, and support for IEC60730 safety functions including CRC and self-diagnostic A/D.

Technical Context

The R5F5631DCDLC#U0 implements the RX CPU core with 5-stage CISC Harvard pipeline, variable-length instructions, and MPU-based memory protection. Its clock system integrates PLL, HOCO (50 MHz), LOCO (125 kHz), and subclock oscillator support - enabling independent domain clocking (ICLK up to 100 MHz, PCLK up to 50 MHz).

Peripheral subsystems include DMAC (4 channels), EXDMAC (2 channels), DTC, RTC with battery backup, independent watchdog (IWDT), and DEU-AES encryption (128/192/256-bit keys). It lacks Ethernet controller and SDRAM interface - confirmed by RX631 Group specification tables - and omits sub-clock oscillator for low-load operation per package comparison data.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A - 176-pin LQFP, 24 × 24 mm body, 0.5 mm pitch, exposed pad (thermal enhancement), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NDCDLC#U0, the R5F5631DCDLC#U0 removes Ethernet and SDRAM support to reduce cost and power while retaining identical USB/CAN/ADC capabilities; versus RX66T, it trades peak performance for broader peripheral integration and USB flexibility in a mature, production-proven platform.

Availability

R5F5631DCDLC#U0 is available at Aetrix Electronics and suitable for industrial HMI, motor control, environmental monitoring, and medical subsystems requiring stable component supply, long-term lifecycle assurance, and automotive-grade reliability without Ethernet dependency.

Supply support for R5F5631DCDLC#U0 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 is designed for cost-sensitive, high-integration industrial control applications where USB connectivity, rich analog peripherals, and functional safety compliance are critical - without the overhead of Ethernet or external memory interfaces.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631DCDLC#U0?

The R5F5631DCDLC#U0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core with a 5-stage pipeline, variable-length instruction set, and Harvard architecture. It achieves 165 DMIPS and includes hardware support for single-precision IEEE-754 floating-point operations, making the R5F5631DCDLC#U0 suitable for computationally intensive real-time tasks such as motor control and digital signal processing.

Does the R5F5631DCDLC#U0 include an Ethernet controller?

No, the R5F5631DCDLC#U0 does not include an Ethernet controller. It belongs to the RX631 Group, which explicitly excludes the ETHERC module present in the RX63N Group. This distinction is confirmed in the official Renesas documentation (R01DS0098EJ0180), where Table 1.2 shows "Not available" for Ethernet controller and EDMAC in all RX631 packages - including the R5F5631DCDLC#U0's 176-pin LQFP variant.

What are the flash and RAM capacities of the R5F5631DCDLC#U0?

The R5F5631DCDLC#U0 integrates 1.5 Mbytes of on-chip flash memory and 128 Kbytes of SRAM, both accessible at zero wait states up to 100 MHz. The flash supports on-board programming and is rated for 100,000 write/erase cycles. These capacities are fixed for this specific part number and verified in Table 1.3 of the RX63N/RX631 datasheet (R01DS0098EJ0180), confirming R5F5631DCDLC#U0 as a 1.5 MB ROM variant in the D-version temperature grade.

Which communication interfaces are supported by the R5F5631DCDLC#U0?

The R5F5631DCDLC#U0 supports USB 2.0 full-speed host/function/OTG (dual ports), two CAN 2.0B channels (32 mailboxes each), up to 13 SCI interfaces (with UART, SPI, I²C, LIN, and smart-card modes), four I²C bus interfaces (one FM+), three RSPI channels, one IEBus channel, and optional parallel data capture (PDC) on select packages. Notably absent are Ethernet and SDRAM interfaces - distinguishing it from RX63N variants.

Is the R5F5631DCDLC#U0 qualified for industrial temperature range operation?

Yes, the R5F5631DCDLC#U0 is rated for industrial operation from –40°C to +85°C (D version), as specified in Table 1.3 of the official datasheet R01DS0098EJ0180. It uses the PLQP0176KB-A 176-pin LQFP package and requires a 2.7–3.6 V supply. No derating is needed within this range, and features like the RTC with battery backup and independent watchdog timer ensure robust operation in harsh environments.