Renesas R5F52318BDNE#40

Overview

R5F52318BDNE#40 from Renesas is a 32-bit RXv2 core microcontroller operating at up to 54 MHz (88.56 DMIPS), featuring 512 KB on-chip flash, 64 KB SRAM, 8 KB data flash, integrated FPU (IEEE 754 single-precision), and hardware encryption (TSIP-Lite AES-128/256). It supports USB 2.0 full-speed host/function/OTG, CAN 2.0B (1 Mbps), 24-channel 12-bit ADC (0.83 µs conversion), dual 12-bit DAC, RTC with battery backup, and capacitive touch sensing (24 keys) - deployed in industrial HMI and smart sensor edge nodes.

For engineers reviewing the R5F52318BDNE#40 datasheet, R5F52318BDNE#40 pinout, R5F52318BDNE#40 application, or R5F52318BDNE#40 equivalent, key selection criteria include its 48-pin HWQFN (7 × 7 mm, 0.5 mm pitch) package, −40 to +85°C temperature grade, SDHI support, CAN channel availability, and TSIP-Lite security compliance for IEC60730-classified systems.

Technical Context

The R5F52318BDNE#40 belongs to the RX231 Group and implements the RXv2 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions. It integrates an on-chip FPU, memory protection unit (MPU), and event link controller (ELC) enabling interrupt-free peripheral coordination during CPU sleep.

Its clock system includes main (1–20 MHz), sub-clock (32.768 kHz), and dedicated oscillators for USB (4/6/8/12 MHz PLL), IWDT (15 kHz), and LPT. Power management supports three low-power modes, with LPT active in software standby and RTC operable on battery backup.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (PWQN0048KB-A), 7 × 7 mm body, 0.5 mm pitch, exposed thermal pad, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F52318BDNE#40, R5F52318ADNE#U0 removes CAN and SDHI while retaining all other capabilities, making it ideal for streamlined USB/SCI applications; R5F52317BDNE#U0 offers identical peripheral set but with 384 KB flash, providing a lower-cost entry point for firmware-limited deployments without sacrificing I/O or security functionality.

Availability

R5F52318BDNE#40 is available at Aetrix Electronics and suitable for industrial HMI, smart sensor nodes, medical diagnostics, automotive body control, and secure IoT edge devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F52318BDNE#40 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 RX231 Group, which includes R5F52318BDNE#40, was designed for high-integrity embedded systems demanding real-time performance, functional safety (IEC60730), and hardware security in space-constrained industrial and consumer equipment.

FAQ

What is the maximum system clock frequency supported by the R5F52318BDNE#40?

The R5F52318BDNE#40 supports a maximum system clock (ICLK) frequency of 54 MHz, achievable when VCC is between 2.7 V and 5.5 V. At this speed, the RXv2 core delivers 88.56 DMIPS. The USB clock is independently generated at 48 MHz using the dedicated USB PLL, allowing concurrent high-speed USB operation without compromising CPU performance. This timing is confirmed in Section 1.1 of R01DS0261EJ0120 Rev.1.20.

Does the R5F52318BDNE#40 include a CAN controller, and what standard does it comply with?

Yes, the R5F52318BDNE#40 includes one channel of the RSCAN CAN module compliant with ISO11898-1, supporting both standard and extended frames at up to 1 Mbps. It features 16 message boxes, error handling, and loopback self-test mode. This capability is explicitly listed in Table 1.1 (page 4) and confirmed in Table 1.2 for the RX231 Group 48-pin variants like R5F52318BDNE#40.

What package type and dimensions does the R5F52318BDNE#40 use?

The R5F52318BDNE#40 uses the PWQN0048KB-A package: a 48-pin HWQFN with 7 × 7 mm body size, 0.5 mm pin pitch, and an exposed thermal pad. This is documented in Table 1.3 (page 7) and the "Packages" section on page 5 of R01DS0261EJ0120 Rev.1.20. It is distinct from larger 64- and 100-pin variants and shares footprint compatibility only with other PWQN0048KB-A-marked devices.

Is the R5F52318BDNE#40 qualified for industrial temperature operation?

Yes, the R5F52318BDNE#40 is rated for −40 to +85°C operation (D version), as specified in Table 1.3 (page 7) and the "Operating temperature range" section on page 5 of R01DS0261EJ0120 Rev.1.20. This qualifies it for industrial environments where ambient temperatures exceed commercial-grade limits, and it includes LVD, RTC battery backup, and robust ESD tolerance per Renesas specifications.

Does the R5F52318BDNE#40 support secure boot or cryptographic key storage?

The R5F52318BDNE#40 includes TSIP-Lite, which provides hardware-accelerated AES-128/256 encryption, true random number generation, and secure key management - but it does not implement a dedicated secure boot ROM or immutable root-of-trust. Key protection relies on access control circuits and write-protection fuses; secure boot must be implemented in firmware using TSIP-Lite primitives and external authentication mechanisms. Details are in Section 1.1 (page 5) and the TSIP-Lite description on page 4.