Renesas R5F571MJDDLJ#20

Overview

R5F571MJDDLJ#20 from Renesas is a 32-bit RXv2 core MCU operating at up to 240 MHz (480 DMIPS), featuring 2 MB on-chip code flash, 512 KB SRAM, IEEE 1588-compliant dual Ethernet MAC, high-speed USB 2.0 with battery charging, CAN v2.0B (3 channels), and dual 12-bit A/D converters (29 total channels). It targets industrial automation controllers requiring deterministic real-time networking, secure firmware updates, and mixed-signal I/O.

For engineers reviewing the R5F571MJDDLJ#20 datasheet, R5F571MJDDLJ#20 pinout, R5F571MJDDLJ#20 application, or R5F571MJDDLJ#20 equivalent, key selection criteria include IEEE 1588 PTP timestamping accuracy, dual Ethernet channel isolation, USB 2.0 HS + FS + OTG support, 240-MHz real-time interrupt latency, and IEC 60730 safety features including CRC, oscillation-stop detection, and A/D self-diagnosis.

Technical Context

The R5F571MJDDLJ#20 implements the RXv2 CPU core with single-precision IEEE-754 FPU, two MAC units, and 32-bit multiplier (1-cycle) plus divider (2-cycle). Its memory subsystem includes 2 MB code flash with background programming, 64 KB data flash (100k write cycles), 512 KB SRAM (with 256 KB at zero-wait up to 120 MHz), and 32 KB ECCRAM with SEC-DED error correction.

Clock architecture supports external crystal (8–24 MHz) or internal HOCO/LOCO sources, with independent PLLs for ICLK (up to 240 MHz), PCLKA (up to 120 MHz for Ethernet/USB/AES), PCLKB (up to 60 MHz for timers/SCI), and dedicated ADCLKs (60 MHz). Reset management includes POR, three LVD circuits, and nine reset sources including deep software standby and IWDTa with windowed refresh.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F571MJDDLJ#20, the R5F571MJDDFK#20 reduces I/O count and removes Ethernet PHY signal routing, while the R5F572MLHDFP#30 upgrades to RXv3 with graphics and TRNG but increases BOM cost-neither offers pin compatibility or functional drop-in replacement without PCB revision.

Availability

R5F571MJDDLJ#20 is available at Aetrix Electronics and suitable for industrial PLC controllers, smart energy gateways, medical infusion pumps, and building automation routers requiring stable component supply across extended product lifecycles.

Supply support for R5F571MJDDLJ#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 specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise applications.

The RX71M Group is designed for high-performance, safety-certifiable industrial control applications demanding real-time determinism, multi-protocol connectivity, and integrated functional safety features.

FAQ

What is the maximum operating frequency and DMIPS rating of the R5F571MJDDLJ#20?

The R5F571MJDDLJ#20 operates at a maximum frequency of 240 MHz and delivers 480 DMIPS performance. This is achieved through its RXv2 CPU core with 5-stage pipeline, single-cycle 32-bit multiplier, and dual MAC units. The R5F571MJDDLJ#20 maintains this performance under full peripheral load with appropriate clock domain configuration (ICLK = 240 MHz, PCLKA = 120 MHz).

Does the R5F571MJDDLJ#20 support IEEE 1588 Precision Time Protocol hardware timestamping?

Yes, the R5F571MJDDLJ#20 integrates a dedicated PTP controller (EPTPCa) linked to both Ethernet MACs, enabling hardware timestamping of ingress and egress Ethernet frames with sub-microsecond resolution. This allows the R5F571MJDDLJ#20 to serve as a transparent clock or boundary clock in time-sensitive networking applications without CPU overhead.

How many CAN interfaces does the R5F571MJDDLJ#20 provide, and what is their compliance level?

The R5F571MJDDLJ#20 includes three fully independent CAN modules compliant with ISO 11898-1 (CAN 2.0B), each supporting standard and extended frames with 32 configurable mailboxes. Each CAN channel has dedicated TX/RX pins and supports bit rates up to 1 Mbps. The R5F571MJDDLJ#20 requires external CAN transceivers for physical layer connection.

What safety certifications and built-in diagnostics does the R5F571MJDDLJ#20 support for IEC 60730 compliance?

The R5F571MJDDLJ#20 provides hardware support for IEC 60730 Class B compliance, including oscillation-stoppage detection, hardware CRC calculator, independent watchdog timer (IWDTa) with windowed refresh, and self-diagnostic function for the A/D converter. Register write protection prevents accidental overwrite of critical control registers. These features are documented in the R5F571MJDDLJ#20 datasheet section "Useful functions for IEC60730 compliance".

What is the flash and RAM memory configuration of the R5F571MJDDLJ#20?

The R5F571MJDDLJ#20 integrates 2 MB of on-chip code flash memory with background programming/erasing capability, 64 KB of reprogrammable data flash (rated for 100,000 write cycles), 512 KB of general SRAM (with 256 KB zero-wait access at ≤120 MHz), 32 KB of ECCRAM with SEC-DED error correction, and 8 KB of battery-backed standby RAM. This memory map is fixed for the R5F571MJDDLJ#20 variant.