Renesas R5F51104ADLF#U0

Overview

R5F51104ADLF#U0 from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 96 KB on-chip flash, 16 KB SRAM, 12-bit A/D converter with 14 channels, RTC, and five communication interfaces including SCI, I²C, and RSPI. It targets low-power industrial sensing and control applications requiring deterministic real-time response.

For engineers reviewing the R5F51104ADLF#U0 datasheet, R5F51104ADLF#U0 pinout, R5F51104ADLF#U0 application, or R5F51104ADLF#U0 equivalent, key selection criteria include its 64-pin WFLGA (5 × 5 mm) package, −40 to +85°C temperature grade, integrated high-speed on-chip oscillator (32 MHz ±1%), and support for IEC 60730 functional safety compliance features.

Technical Context

The R5F51104ADLF#U0 implements a CISC Harvard architecture with five-stage pipeline and variable-length instructions, enabling ultra-compact code and single-cycle instruction execution. Its RX CPU core includes a 64-bit accumulator for 32×32-bit multiply operations and dedicated hardware for division and barrel shifting.

On-chip peripherals are clocked independently: ICLK (system bus, up to 32 MHz), PCLK (peripherals, up to 32 MHz), and FCLK (FlashIF, up to 32 MHz). Clock sources include main oscillator (1–20 MHz), sub-clock (32.768 kHz), high-speed on-chip oscillator (32 MHz ±1%), and IWDT-dedicated 15 kHz oscillator - all monitored by the Clock Accuracy Measurement Circuit (CAC).

Key Specifications

Pinout & Package

Packaged in a 64-pin WFLGA (PWLG0064KA-A), 5 × 5 mm, 0.5 mm pitch, with exposed die pad recommended to be connected to VSS.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F51104ADLF#U0, the R5F51104ADFM#30 offers identical functionality in a larger, more manufacturable package, while R5F51103ADLF#U0 reduces flash/SRAM capacity without altering footprint or peripheral availability - enabling scalable BOM management across product tiers.

Availability

R5F51104ADLF#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy metering, home appliance control, and building automation controllers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F51104ADLF#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 automotive, industrial, and IoT markets.

The RX110 Group, including R5F51104ADLF#U0, is designed for cost-sensitive, low-power embedded control applications demanding real-time performance, functional safety support, and compact packaging.

FAQ

What is the maximum operating frequency and associated performance of the R5F51104ADLF#U0?

The R5F51104ADLF#U0 operates at a maximum frequency of 32 MHz, delivering 50 DMIPS of processing performance. This is achieved with zero wait states for both flash and SRAM access, ensuring deterministic execution timing critical for real-time control loops and interrupt-driven systems. The RX CPU core supports single-cycle instruction execution for most basic operations.

Which package type does the R5F51104ADLF#U0 use, and what are its key mechanical characteristics?

The R5F51104ADLF#U0 uses the PWLG0064KA-A package: a 64-pin WFLGA (wafer-level chip-scale package) measuring 5 × 5 mm with 0.5 mm pitch. It features an exposed die pad that must be connected to VSS for thermal and electrical integrity. This package enables ultra-compact PCB layouts ideal for space-constrained industrial and consumer modules.

Does the R5F51104ADLF#U0 support functional safety standards such as IEC 60730?

Yes, the R5F51104ADLF#U0 integrates hardware features required for IEC 60730 Class B compliance, including a Clock Accuracy Measurement Circuit (CAC), Independent Watchdog Timer (IWDT) with dedicated oscillator, and RAM test assist functions. These allow developers to implement self-test routines and fault detection without external components, reducing certification effort.

How many communication interfaces does the R5F51104ADLF#U0 provide, and what protocols are supported?

The R5F51104ADLF#U0 provides five total communication channels: three SCI modules (SCI1, SCI5, SCIf12) supporting asynchronous UART, clock-synchronous, simple I²C, and simple SPI modes; one RIIC interface (400 kbps I²C/SMBus); and one RSPI interface (16 Mbps SPI master/slave). All are independently configurable and clocked.

What are the A/D converter specifications of the R5F51104ADLF#U0, and how is it triggered?

The R5F51104ADLF#U0 includes a 12-bit S12AD unit with 14 input channels and a minimum conversion time of 1.0 µs at 32 MHz ADCLK. Conversions can be initiated by software command, external signal on ADTRG0#, or timer triggers from MTU2 channels - enabling precise synchronization with motor commutation or waveform sampling events.