Renesas R5F5671CHDBP#20

Overview

R5F5671CHDBP#20 from Renesas is a 32-bit RXv3 microcontroller operating at up to 120 MHz, featuring double-precision IEEE-754 FPU, 1 MB on-chip code flash, 384 KB SRAM, and integrated CAN, USB 2.0 FS, SD host, QSPIX, and capacitive touch sensing-designed for industrial HMI, smart metering, and secure IoT edge nodes.

For engineers reviewing the R5F5671CHDBP#20 datasheet, R5F5671CHDBP#20 pinout, R5F5671CHDBP#20 application, or R5F5671CHDBP#20 equivalent, key selection considerations include its 144-pin LFQFP package (PLQP0144KA-B), dual-bank flash for safe firmware updates, TSIP-based AES256/SHA256 encryption, IEC60730 safety support, and 12-bit A/D with self-diagnostic capability.

Technical Context

The R5F5671CHDBP#20 implements the RXv3 CPU core with 113 instructions, 16 general-purpose 32-bit registers, and hardware-accelerated DSP operations-including 32×32→64-bit multiply and 32/32→32-bit divide. Its memory subsystem integrates 1 MB code flash with ROM cache (8 KB), enabling zero-wait access at ≤60 MHz and one-wait access at 120 MHz.

Peripheral timing is decoupled across five clock domains: ICLK (up to 120 MHz for CPU/QSPIX), PCLKA (up to 120 MHz for MTU/RSPI/RIICHS), PCLKB (up to 60 MHz for most peripherals), PCLKC/PCLKD (up to 60 MHz for S12AD units), and FCLK/BCLK (up to 60 MHz). The ELC enables direct inter-module event linking without CPU intervention-critical for deterministic real-time control.

Key Specifications

Pinout & Package

Package: PLQP0144KA-B - 144-pin Low-profile Quad Flat Package, 20 × 20 mm body, 0.50-mm lead pitch, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5671EHDBP#20, the R5F5671CHDBP#20 trades flash capacity for lower unit cost while retaining identical security, connectivity, and real-time capabilities; versus R5F566TEHDFP#30, it prioritizes broad peripheral integration and certified security over raw motor-control throughput.

Availability

R5F5671CHDBP#20 is available at Aetrix Electronics and suitable for industrial HMI, smart metering, secure IoT gateways, and motor control edge nodes requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5671CHDBP#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 enterprise applications.

The RX671 Group targets secure, connected industrial edge devices-combining high-performance RXv3 execution, hardware security (TSIP), and rich connectivity (USB, SDHI, CAN, QSPIX) in a single chip for certified, field-upgradable systems.

FAQ

What is the maximum operating frequency and CoreMark score of the R5F5671CHDBP#20?

The R5F5671CHDBP#20 operates at a maximum frequency of 120 MHz and achieves 707 CoreMark under benchmark conditions. This performance stems from the RXv3 CPU core's efficient instruction pipeline, double-precision FPU, and zero-wait-state access to 384 KB SRAM. The R5F5671CHDBP#20 maintains this speed across its full voltage range (2.7–3.6 V) and industrial temperature range (–40°C to +85°C).

Does the R5F5671CHDBP#20 support secure firmware updates and cryptographic operations?

Yes, the R5F5671CHDBP#20 integrates Trusted Secure IP (TSIP) supporting AES128/192/256, SHA256, TRNG, and RSA acceleration. Its dual-bank flash enables background programming and atomic bank switching-allowing validated firmware images to be written while the system runs from the active bank. The R5F5671CHDBP#20 also provides register write protection and IEC60730-compliant self-tests for secure boot and runtime integrity.

What package type and pin count does the R5F5671CHDBP#20 use?

The R5F5671CHDBP#20 uses the PLQP0144KA-B package: a 144-pin Low-profile Quad Flat Package measuring 20 × 20 mm with 0.50-mm pitch. It provides 113 general-purpose I/O pins, including 20 that are 5-V tolerant, plus dedicated pins for USB, SD host, QSPIX, CAN, and capacitive touch sensing. This package is pin-compatible with other RX671 Group variants in the same footprint.

Can the R5F5671CHDBP#20 interface directly with SD memory cards and serial flash?

Yes, the R5F5671CHDBP#20 includes a full-featured SD host interface (SDHI) supporting 1- and 4-bit SD buses at up to 25 MB/s (high-speed mode), compliant with SD Physical Layer Spec v3.01. It also integrates QSPIX-a dedicated Quad-SPI memory interface enabling execute-in-place (XIP) from serial NOR flash using extended/dual/quad-SPI protocols. Both interfaces require no external level shifters or glue logic.

What safety and reliability features does the R5F5671CHDBP#20 offer for industrial applications?

The R5F5671CHDBP#20 includes multiple IEC60730 Class B compliance features: oscillation-stop detection, CRC-A for memory checking, independent watchdog timer (IWDTa) with configurable windowing, A/D converter self-diagnostic, and register write protection. It also supports battery-backed RTC and standby RAM, four low-power modes (including deep software standby), and voltage-monitoring reset circuits with programmable thresholds-ensuring robust operation in harsh industrial environments.