Renesas R5F52318BDND#20

Overview

R5F52318BDND#20 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), SD host interface, capacitive touch sensing (24 channels), 12-bit A/D (24 ch), 12-bit D/A (2 ch), RTC, and operates from 1.8–5.5 V across −40 to +85°C.

For engineers reviewing the R5F52318BDND#20 datasheet, R5F52318BDND#20 pinout, R5F52318BDND#20 application, or R5F52318BDND#20 equivalent, key selection criteria include its 64-pin HWQFN (PWQN0064KC-A) package, USB+CAN+SDHI integration, TSIP-Lite security compliance, and support for IEC60730 functional safety diagnostics in industrial control and connected appliance designs.

Technical Context

The R5F52318BDND#20 belongs to the RX231 Group and implements the RXv2 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions. It integrates dual clock domains (ICLK up to 54 MHz, PCLKB up to 32 MHz) and features event-driven peripheral operation via ELC-enabling timer-triggered ADC conversion, PWM waveform generation, and low-power module activation without CPU intervention.

Its peripheral set includes one CAN channel compliant with ISO11898-1, one USB 2.0 OTG module with internal transceiver and BC1.2 support, and an SD host interface supporting 1-/4-bit SD/SDIO buses per Physical Layer Spec v3.01. The device lacks external bus interface and RTC in 64-pin packages per Table 1.2, confirming functional differentiation from 100-pin variants.

Key Specifications

Pinout & Package

Packaged in a 64-pin HWQFN (PWQN0064KC-A), the R5F52318BDND#20 uses a 9 × 9 mm body with 0.5 mm pitch and exposed thermal pad. Pin functions are defined by Multi-Function Pin Controller (MPC), enabling flexible I/O assignment across 43 general-purpose ports (including 5-V tolerant and open-drain options).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F52318BDND#20, R5F52318ADND#U0 removes cryptographic capability but retains full peripheral functionality, while R5F52317BDND#U0 reduces memory and excludes SDHI/CAN-making both viable alternatives only when those specific features are unnecessary for the target design.

Availability

R5F52318BDND#20 is available at Aetrix Electronics and suitable for industrial HMI, smart appliance control, USB-C power tools, and medical sensor hub applications requiring stable component supply, long-term lifecycle support, and automotive-grade reliability under extended temperature conditions.

Supply support for R5F52318BDND#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, and power solutions for industrial, automotive, and IoT markets.

The RX231 Group, including R5F52318BDND#20, was designed for cost-effective, high-integration industrial control applications demanding USB, CAN, SD, security, and functional safety-targeting appliances, factory HMIs, and portable medical devices.

FAQ

What is the maximum system clock frequency supported by the R5F52318BDND#20?

The R5F52318BDND#20 supports a maximum system clock (ICLK) frequency of 54 MHz, delivering 88.56 DMIPS performance. This speed is achievable when VCC is ≥2.7 V; at lower voltages (1.8–2.4 V), max frequency drops to 8 MHz. The on-chip PLL and USB-dedicated PLL allow independent 54 MHz system and 48 MHz USB clock generation.

Does the R5F52318BDND#20 include a real-time clock (RTC)?

No, the R5F52318BDND#20 does not include an RTC. Per Table 1.2 in the datasheet, RTC functionality is excluded from all 64-pin and 48-pin RX231 Group packages-including PWQN0064KC-A. RTC is only available in 100-pin variants (e.g., R5F52318ADLA#20).

Which package type is used for the R5F52318BDND#20?

The R5F52318BDND#20 uses the PWQN0064KC-A package: a 64-pin HWQFN with 9 × 9 mm body size, 0.5 mm pitch, and exposed thermal pad. This package supports 43 general-purpose I/O pins, 5-V tolerance on select pins, and is rated for −40 to +85°C operation.

What security features are implemented in the R5F52318BDND#20?

The R5F52318BDND#20 integrates TSIP-Lite, Renesas' trusted secure IP block, supporting AES-128/256 encryption (GCM/CBC/ECB), true random number generation, secure key management, and tamper-resistant access control. These features enable secure boot, encrypted firmware updates, and protected communication in industrial and consumer applications.

Is the R5F52318BDND#20 compatible with IEC60730 Class B functional safety standards?

Yes, the R5F52318BDND#20 includes dedicated hardware features for IEC60730 compliance: memory protection unit (MPU), clock frequency accuracy measurement circuit (CAC), independent watchdog timer (IWDT) with disconnection detection, RAM test assistance via DOC, and ADC self-diagnostic functions-all documented in the datasheet as part of its safety support suite.