Renesas R5F566NNDDLK#20

Overview

R5F566NNDDLK#20 from Renesas is a 120 MHz 32-bit RXv3 microcontroller with double-precision IEEE-754 FPU, 2 MB on-chip code flash, 1 MB SRAM (512 KB + 512 KB expansion), and integrated Ethernet MAC, CAN, SDHI, QSPI, and GLCDC for industrial HMI and networked embedded applications.

For engineers reviewing the R5F566NNDDLK#20 datasheet, R5F566NNDDLK#20 pinout, R5F566NNDDLK#20 application, or R5F566NNDDLK#20 equivalent, this MCU delivers deterministic real-time control with IEC60730 safety support, dual-bank flash for safe firmware updates, and hardware-accelerated 2D graphics rendering - critical for edge gateways and programmable logic controllers requiring secure, high-throughput peripheral integration.

Technical Context

The R5F566NNDDLK#20 implements the RXv3 CPU core with 698 CoreMark at 120 MHz, supporting little-endian or big-endian data arrangement and 113 instructions including DSP and floating-point operations. Its memory subsystem includes dual-bank 2 MB code flash with background programming, 32 KB data flash rated for 100,000 erase/write cycles, and ECC-protected 32 KB RAM with SEC-DED error correction.

Peripheral architecture integrates ETHERC (10/100 Mbps MII/RMII), three CAN channels (ISO 11898-1 compliant, 32 mailboxes each), SDHI (25 MB/s, 1-/4-bit bus), and GLCDC+DRW2D for direct LCD driving and hardware-accelerated 2D drawing. Clocking uses PLL-synthesized ICLK up to 120 MHz, with independent PCLKA/PCLKB domains enabling concurrent high-speed (120 MHz) and low-latency (60 MHz) peripheral operation.

Key Specifications

Pinout & Package

LFBGA-176 package (PLBG0176GA-A), 13 mm × 13 mm, 0.8 mm pitch, 136 general-purpose I/O pins with 5-V tolerance, open-drain capability, and pull-up resistors.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F566NNDDLK#20, the R5F566NNDHLK#20 trades LFBGA density and display/camera support for easier hand-soldering and lower-cost PCB routing, while the R5F566TNDHLK#20 provides double the flash in the same LQFP footprint - making both viable alternatives depending on layout constraints and memory requirements.

Availability

R5F566NNDDLK#20 is available at Aetrix Electronics and suitable for industrial gateways, HMIs, PLCs, smart energy meters, and networked motor drives requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature resilience.

Supply support for R5F566NNDDLK#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 is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and enterprise applications.

The RX66N Group is designed for high-performance, safety-aware industrial edge devices - integrating real-time control, rich connectivity, and graphics acceleration into a single chip for next-generation automation and human-machine interaction.

FAQ

What is the maximum operating frequency and CoreMark score of the R5F566NNDDLK#20?

The R5F566NNDDL#20 operates at a maximum frequency of 120 MHz and achieves 698 CoreMark under those conditions. This performance stems from the RXv3 CPU core's efficient pipeline, double-precision FPU, and zero-wait-state access to 1 MB SRAM and 2 MB flash. The R5F566NNDDLK#20 sustains this throughput across real-world workloads involving Ethernet packet processing, CAN messaging, and 2D graphics rendering.

Does the R5F566NNDDLK#20 support dual-bank flash for safe firmware updates?

Yes, the R5F566NNDDLK#20 implements a dual-bank flash architecture that allows background programming of one bank while executing code from the other. This enables atomic firmware updates without system interruption - essential for industrial gateways and PLCs requiring continuous uptime. The R5F566NNDDLK#20 supports bank swapping at reset, ensuring verified code starts immediately after update completion.

Which display interfaces does the R5F566NNDDLK#20 integrate, and what resolutions are supported?

The R5F566NNDDLK#20 integrates a Graphic-LCD Controller (GLCDC) and 2D Drawing Engine (DRW2D). The GLCDC supports multiple data formats (32/16 bpp graphics, 8/4/1-bit CLUT) and panel types, while DRW2D accelerates vector drawing and bit-blitting. Though exact resolution depends on external memory bandwidth and timing, the R5F566NNDDLK#20 commonly drives 480×272, 800×480, and 1024×600 TFT panels - validated in Renesas reference designs using its 1 MB SRAM frame buffer.

How many CAN channels does the R5F566NNDDLK#20 support, and what protocol compliance is guaranteed?

The R5F566NNDDLK#20 integrates three fully independent CAN modules, each compliant with ISO 11898-1 for standard and extended frames. Each channel supports 32 configurable mailboxes with dedicated acceptance filtering, TX/RX FIFOs, and automatic retransmission. This enables robust multi-network fieldbus communication - for example, one channel for motor control, one for sensor aggregation, and one for diagnostics - all handled concurrently by the R5F566NNDDLK#20 without software arbitration overhead.

What IEC60730 safety features are implemented in hardware on the R5F566NNDDLK#20?

The R5F566NNDDLK#20 includes hardware-based IEC60730 compliance features: a dedicated CRC calculation unit, self-diagnostic routines for the 12-bit A/D converter, oscillation-stoppage detection for clock sources, register write protection for critical control registers, and independent watchdog timers (WDTA and IWDTa) with windowing. These features are documented in the R5F566NNDDLK#20 functional safety manual and enable Class B certification without external monitoring circuitry.