Renesas R5F571MJCDLJ#20

Overview

R5F571MJCDLJ#20 from Renesas is a 32-bit RXv2 core microcontroller operating at up to 240 MHz, delivering 480 DMIPS with integrated single-precision IEEE-754 FPU, 4 MB on-chip code flash, 512 KB SRAM (including 32 KB ECC RAM), and IEEE 1588-compliant dual Ethernet MAC - designed for industrial real-time control, gateway edge processing, and networked embedded systems requiring deterministic timing and secure connectivity.

For engineers reviewing the R5F571MJCDLJ#20 datasheet, R5F571MJCDLJ#20 pinout, R5F571MJCDLJ#20 application, or R5F571MJCDLJ#20 equivalent, this MCU supports high-speed USB 2.0 HS with battery charging, triple CAN FD-capable channels (ISO 11898-1), SD host interface, quad SPI, hardware AES/SHA encryption, and IEC 60730 safety features - critical for functional safety-certified designs in factory automation and energy infrastructure.

Technical Context

The R5F571MJCDLJ#20 implements the RXv2 CPU core with CISC Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It integrates dual Ethernet controllers (ETHERC) with dedicated PTP hardware (EPTPCa) compliant with IEEE 1588-2008 for sub-microsecond time synchronization, and three independent CAN modules each supporting 32 mailboxes and standard/extended frames.

Its memory subsystem includes 4 MB code flash with background programming (BGO), 64 KB data flash rated for 100,000 erase/write cycles, and 512 KB SRAM partitioned into zero-wait regions (256 KB @ 240 MHz) and ECC-protected 32 KB RAM. Clocking uses PLL multiplication of HOCO (16–20 MHz) or external crystal (8–24 MHz) to achieve 240 MHz ICLK, while peripheral clocks (PCLKA/PCLKB) are independently configurable up to 120 MHz and 60 MHz respectively.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A (176-pin LQFP, 24 × 24 mm, 0.5 mm pitch). Pin count and I/O configuration match RX71M Group's 176-pin variant: 127 general-purpose I/O pins with 5-V tolerance on 19 pins, pull-up resistors, open-drain capability, and programmable drive strength.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit industrial MCU applications.

Compared with R5F571MLDFB#30, the R5F571MJCDLJ#20 provides identical functionality in LQFP packaging for easier prototyping and rework, while R5F566TEADFP#30 trades gateway capabilities for lower-cost motor-specific timing - making it unsuitable as a drop-in replacement but viable for simplified edge nodes.

Availability

R5F571MJCDLJ#20 is available at Aetrix Electronics and suitable for industrial gateways, smart metering hubs, motion control edge nodes, and building automation controllers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F571MJCDLJ#20 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 Corporation is a global semiconductor leader headquartered in Tokyo, Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX71M Group - including R5F571MJCDLJ#20 - was engineered for industrial real-time control and networked edge intelligence, combining high-performance computing, deterministic Ethernet, functional safety features, and hardware security to replace legacy dual-MCU gateway architectures.

FAQ

What is the maximum operating frequency and core type of the R5F571MJCDLJ#20?

The R5F571MJCDLJ#20 features a 32-bit RXv2 CPU core with a maximum operating frequency of 240 MHz, achieving 480 DMIPS performance. Its CISC Harvard architecture includes a 5-stage pipeline and variable-length instructions for high code density. This enables deterministic real-time execution in applications such as motion control and industrial gateways where cycle-accurate timing is critical. The R5F571MJCDLJ#20 sustains zero-wait-state operation on 256 KB of SRAM even at full speed.

Does the R5F571MJCDLJ#20 support IEEE 1588 Precision Time Protocol?

Yes, the R5F571MJCDLJ#20 integrates a dedicated IEEE 1588-compliant PTP controller (EPTPCa) tightly coupled to its dual Ethernet MACs (ETHERC). It supports hardware timestamping of ingress/egress Ethernet frames with sub-100 ns resolution, enabling time-synchronized networking for TSN applications. The R5F571MJCDLJ#20 also provides PTP event message filtering and transparent clock functionality - all implemented in hardware to avoid CPU overhead.

How much on-chip memory does the R5F571MJCDLJ#20 include?

The R5F571MJCDLJ#20 includes 4 MB of on-chip code flash memory with background programming (BGO), 64 KB of reprogrammable data flash (rated for 100,000 cycles), 512 KB of SRAM (with 256 KB zero-wait at 240 MHz), 32 KB of ECC-protected RAM, and 8 KB of standby RAM. This memory hierarchy supports complex real-time OS environments, secure boot partitions, and local data buffering - all without external memory. The R5F571MJCDLJ#20 leverages its AFU (Access Function Unit) to maintain zero-wait access even at peak CPU frequency.

What communication interfaces are available on the R5F571MJCDLJ#20?

The R5F571MJCDLJ#20 provides dual IEEE 1588 Ethernet MACs (MII/RMII), triple CAN (ISO 11898-1), high-speed USB 2.0 (480 Mbps) with battery charging and OTG, four SCIFA UARTs with 16-byte FIFOs, two RIIC I²C interfaces (up to 1 Mbps), two RSPI SPI controllers, one QSPI for serial flash, SD host interface (SDHI), MMCIF, and two SSI audio interfaces. These interfaces enable seamless integration into heterogeneous industrial networks - the R5F571MJCDLJ#20 is specifically configured for 176-pin LQFP packages with full peripheral enablement.

Is hardware encryption supported on the R5F571MJCDLJ#20?

Yes, the R5F571MJCDLJ#20 includes optional hardware acceleration for AES (128/192/256-bit keys), DES/T-DES, and SHA-1/224/256/HMAC cryptographic functions. These accelerators operate independently of the CPU, enabling high-throughput TLS 1.2/1.3 handshakes, secure boot verification, and encrypted firmware updates without compromising real-time performance. The R5F571MJCDLJ#20's crypto engines are accessible via the trusted memory (TM) protected region to prevent unauthorized access to keys.