Renesas R5F52318ADND#20

Overview

R5F52318ADND#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 targets industrial HMI, sensor fusion nodes, and USB-connected embedded control systems requiring real-time responsiveness and secure firmware updates.

For engineers reviewing the R5F52318ADND#20 datasheet, R5F52318ADND#20 pinout, R5F52318ADND#20 application, or R5F52318ADND#20 equivalent, key selection criteria include its 64-pin HWQFN (PWQN0064KC-A) package, USB 2.0 full-speed host/function/OTG support, CAN interface, 24-channel 12-bit ADC with 0.83 µs conversion time, and −40 to +85°C D-version temperature rating.

Technical Context

The R5F52318ADND#20 implements the RXv2 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions-enabling ultra-compact code and deterministic interrupt latency. It integrates an on-chip FPU for real-time floating-point math and a memory protection unit (MPU) for robust task isolation in RTOS environments.

Its clock system supports multiple sources: main oscillator (1–20 MHz), sub-clock (32.768 kHz), PLL (4–12.5 MHz input), and USB-dedicated PLL (4/6/8/12 MHz), enabling independent 54 MHz system clock and 48 MHz USB clock generation. The ELC (Event Link Controller) allows direct inter-module triggering without CPU intervention, reducing power and latency in low-power sensor polling or timer-triggered ADC sampling.

Key Specifications

Pinout & Package

Packaged in a 64-pin HWQFN (PWQN0064KC-A), the R5F52318ADND#20 features a 9 × 9 mm body with 0.5 mm pitch and exposed thermal pad. Pin functions are configurable via MPC (Multi-function Pin Controller), supporting flexible peripheral mapping across GPIO, analog inputs, USB D+/D−, CAN TX/RX, and high-speed serial interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F52318BDND#U0 and R5F52317ADND#U0, the R5F52318ADND#20 provides optimal balance of USB/CTSU/ADC performance and cost for non-CAN, non-SDHI applications-offering full 512 KB flash and all analog features while avoiding over-specification.

Availability

R5F52318ADND#20 is available at Aetrix Electronics and suitable for industrial HMI panels, USB-connected sensor nodes, secure gateways, motor control edge devices, and touch-based consumer electronics requiring stable component supply across multi-year production cycles.

Supply support for R5F52318ADND#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 automotive, industrial, and IoT markets.

The RX231 Group-including the R5F52318ADND#20-is designed for high-integration, low-power embedded control applications demanding real-time performance, security, and rich analog/mixed-signal capability in compact packages.

FAQ

What is the maximum operating frequency and core type of the R5F52318ADND#20?

The R5F52318ADND#20 operates at a maximum frequency of 54 MHz using the 32-bit RXv2 CPU core. This core delivers 88.56 DMIPS performance and includes a 5-stage pipeline, variable-length instruction set, and on-chip FPU compliant with IEEE 754 single-precision standards. Its architecture supports deterministic interrupt response and ultra-compact code density, making it suitable for real-time embedded control tasks where timing predictability is critical. The R5F52318ADND#20 achieves this performance across its full 1.8–5.5 V supply range.

Does the R5F52318ADND#20 support USB functionality, and what modes are available?

Yes, the R5F52318ADND#20 integrates a USB 2.0 host/function/OTG module supporting full-speed (12 Mbps) and low-speed (1.5 Mbps) operation. It supports isochronous transfers, BC1.2 battery charging detection, and internal USB power regulation-allowing operation without external VCC_USB supply when VCC is 4.0–5.5 V. The R5F52318ADND#20 does not require an external PHY, and its USB stack supports CDC ACM, HID, and mass storage classes via firmware implementation. This makes the R5F52318ADND#20 ideal for field-upgradable devices and human interface peripherals.

What analog peripherals are included in the R5F52318ADND#20?

The R5F52318ADND#20 includes a 24-channel 12-bit A/D converter with 0.83 µs minimum conversion time, two 12-bit D/A converter channels, two analog comparator units (four total channels), and an integrated temperature sensor. The ADC supports per-channel programmable sampling time, self-diagnostic mode, and analog input disconnection detection. The DAC outputs deliver 0.4 V to AVCC0 − 0.5 V with rail-to-rail capability. These peripherals are fully supported in the R5F52318ADND#20's 64-pin HWQFN package, with dedicated pins mapped for all 24 ADC inputs and both DAC outputs.

Is CAN functionality available on the R5F52318ADND#20?

No, CAN functionality is not available on the R5F52318ADND#20. According to Renesas' official datasheet (R01DS0261EJ0120, Table 1.2), the R5F52318ADND#20-being part of the RX231 Group in the 64-pin package-has CAN support marked as "Not supported". In contrast, the B-variant R5F52318BDND#U0 enables the CAN module. Therefore, designers requiring CAN must select the B variant or consider alternative packages like the 100-pin versions where CAN is available in both A and B variants. The R5F52318ADND#20 retains all other major interfaces including USB, SCI, I²C, and RSPI.

What security features does the R5F52318ADND#20 provide for firmware and data protection?

The R5F52318ADND#20 incorporates TSIP-Lite (Trusted Secure IP Lite), offering hardware-accelerated AES-128 and AES-256 encryption in ECB, CBC, GCM, and other modes; a true random number generator; and secure key management that prevents unauthorized access to the encryption engine. It also includes a CRC calculator with three polynomial options and IEC60730-compliant safety features such as ADC self-test, clock accuracy measurement, and RAM test assistance. These capabilities are natively supported in the R5F52318ADND#20 without external components, enabling secure boot, encrypted firmware updates, and tamper-resistant data logging.