Renesas R5F52318BDNE#U0

Overview

R5F52318BDNE#U0 from Renesas is a 32-bit RXv2 microcontroller with 54 MHz max operating frequency, 512 KB on-chip flash, 64 KB SRAM, and integrated FPU compliant with IEEE754. It features USB 2.0 full-speed host/function/OTG, CAN 2.0B (1 Mbps), 24-channel 12-bit A/D converter (0.83 µs conversion), and TSIP-Lite encryption engine supporting AES-128/256 for secure firmware updates in industrial HMI applications.

For engineers reviewing the R5F52318BDNE#U0 datasheet, R5F52318BDNE#U0 pinout, R5F52318BDNE#U0 application, or R5F52318BDNE#U0 equivalent, this MCU delivers deterministic real-time control with ELC-driven event chaining, low-power RTC operation on backup supply, and hardware-accelerated cryptographic operations - critical for IEC60730-compliant appliance controllers and connected sensor gateways requiring functional safety and data integrity.

Technical Context

The R5F52318BDNE#U0 implements the RXv2 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling 88.56 DMIPS at 54 MHz. It integrates a memory protection unit (MPU), on-chip divider (2-cycle latency), and fast interrupt response with 167 vector entries and 16 priority levels.

Its clock system supports independent domain control: ICLK up to 54 MHz for CPU/system, PCLKA up to 54 MHz for MTU2a, PCLKD up to 54 MHz for A/D, and BCLK/FCLK at 32 MHz for external bus and FlashIF. The ELC enables direct module-to-module triggering without CPU intervention, while the DTC provides chain-transfer-capable background data movement.

Key Specifications

Pinout & Package

Package: PWQN0048KB-A - 48-pin HWQFN, 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 R5F52318ADNE#U0 and R5F52317BDNE#U0, the R5F52318BDNE#U0 uniquely combines full TSIP-Lite security, 512 KB flash, and 24-channel A/D in the 48-pin HWQFN package - making it optimal for secure, sensor-rich edge devices where code size and cryptographic capability constrain alternative selection.

Availability

R5F52318BDNE#U0 is available at Aetrix Electronics and suitable for industrial HMI panels, smart appliance controllers, USB-C sensor gateways, and automotive body control modules requiring stable component supply across extended temperature and long production lifecycles.

Supply support for R5F52318BDNE#U0 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 IoT markets.

The RX231 Group, which includes the R5F52318BDNE#U0, was designed for high-integrity embedded applications demanding real-time performance, functional safety, and hardware security - particularly in white goods, building automation, and industrial control.

FAQ

What is the maximum operating frequency and CPU performance of the R5F52318BDNE#U0?

The R5F52318BDNE#U0 operates at a maximum system clock frequency of 54 MHz using its RXv2 CPU core, delivering 88.56 DMIPS of processing performance. Its 5-stage pipeline, variable-length instruction set, and on-chip multiplier/divider enable deterministic real-time execution. The R5F52318BDNE#U0 achieves this performance with no wait states on SRAM and optimized flash access via ROM accelerator hit logic.

Does the R5F52318BDNE#U0 support USB device and host functionality simultaneously?

Yes, the R5F52318BDNE#U0 integrates a USB 2.0 full-speed host/function module supporting On-The-Go (OTG) operation. It can dynamically switch between device and host roles under software control and supports isochronous transfers and BC1.2 battery charging negotiation. The R5F52318BDNE#U0 includes an internal USB regulator, allowing VCC_USB pin omission when main VCC is 4.0–5.5 V.

What security features does the R5F52318BDNE#U0 provide for firmware protection?

The R5F52318BDNE#U0 includes TSIP-Lite - a hardware encryption engine supporting AES-128/256 in GCM, CBC, and ECB modes, plus a true random number generator and secure key management. It prevents unauthorized access to cryptographic functions and enables authenticated encryption for secure boot and OTA firmware updates. The R5F52318BDNE#U0 also supports IEC60730 self-test routines for memory and peripherals.

How many analog input channels does the R5F52318BDNE#U0 support, and what is its conversion speed?

The R5F52318BDNE#U0 integrates a 12-bit successive-approximation A/D converter with 24 input channels and a minimum conversion time of 0.83 µs when ADCLK runs at 54 MHz. Sampling time is configurable per channel, and it supports scan modes, group priority control, self-diagnostic functions, and analog input disconnection detection. The R5F52318BDNE#U0 uses the same A/D peripheral for temperature sensor digitization.

What package type and pin count does the R5F52318BDNE#U0 use?

The R5F52318BDNE#U0 is packaged in a 48-pin HWQFN (PWQN0048KB-A) with 7 × 7 mm body size, 0.5 mm pitch, and an exposed thermal pad. This compact, surface-mount package supports high-density PCB layouts and provides 30 general-purpose I/O pins (RX231 Group), 5-V-tolerant inputs, open-drain outputs, and configurable pull-up resistors - all verified in the official Renesas datasheet R01DS0261EJ0120.