Renesas R5F51105ADFM#30

Overview

R5F51105ADFM#30 from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 128 Kbytes of on-chip flash, 16 Kbytes of SRAM, a 12-bit A/D converter with 14 channels, RTC, and dual SCI + I²C + RSPI interfaces. It targets low-power industrial sensor nodes and embedded control systems requiring deterministic real-time response and IEC 60730 compliance.

For engineers reviewing the R5F51105ADFM#30 datasheet, R5F51105ADFM#30 pinout, R5F51105ADFM#30 application, or R5F51105ADFM#30 equivalent, key selection criteria include its −40 to +85°C temperature grade, PLQP0064KB-A 64-pin LFQFP package, software standby mode (0.35 μA), 1.0 μs A/D conversion time, and integrated clock accuracy measurement (CAC) for functional safety.

Technical Context

The R5F51105ADFM#30 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 and hardware multiplier/divider supporting 32×32 operations in one cycle.

On-chip peripherals are clocked independently: ICLK (system, up to 32 MHz), PCLK (peripherals, up to 32 MHz), and FCLK (FlashIF, up to 32 MHz). The MCU integrates IEC 60730-compliant features including IWDT with dedicated 15 kHz oscillator, LVD with 10-level voltage detection, and RAM test assist functions.

Key Specifications

Pinout & Package

Package: PLQP0064KB-A - 64-pin Low-Profile Quad Flat Package, 10 × 10 mm body, 0.5 mm lead pitch, exposed pad not specified, RoHS-compliant Sn termination.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51105AGFM#30, the R5F51105ADFM#30 trades extended temperature rating for lower unit cost while retaining identical functionality below +85°C; versus R5F51104ADFM#30, it adds 32 Kbytes of flash for larger firmware or OTA update partitions without altering footprint or timing behavior.

Availability

R5F51105ADFM#30 is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor controllers, and smart energy meters requiring stable component supply across multi-year production cycles.

Supply support for R5F51105ADFM#30 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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RX110 Group, including R5F51105ADFM#30, was designed for cost-sensitive, low-power embedded applications demanding functional safety (IEC 60730), rich analog integration, and deterministic real-time performance in compact packages.

FAQ

What is the maximum operating frequency and CPU performance of the R5F51105ADFM#30?

The R5F51105ADFM#30 operates at a maximum frequency of 32 MHz and delivers 50 DMIPS (Dhrystone MIPS) performance. Its RX CPU core features a five-stage pipeline, variable-length instruction set, and hardware 32×32 multiplier/divider that executes multiplication in one cycle-enabling efficient signal processing and real-time control tasks without external acceleration.

Does the R5F51105ADFM#30 support IEC 60730 functional safety compliance?

Yes, the R5F51105ADFM#30 includes dedicated hardware for IEC 60730 Class B compliance: an independent watchdog timer (IWDT) with its own 15 kHz oscillator, clock frequency accuracy measurement circuit (CAC), voltage monitoring with configurable thresholds, and built-in RAM test assist functions-all documented in Renesas' RX110 Functional Safety Manual.

What are the memory capacities and access characteristics of the R5F51105ADFM#30?

The R5F51105ADFM#30 integrates 128 Kbytes of on-chip flash memory and 16 Kbytes of SRAM, both operating at full 32 MHz with zero wait states. Flash supports 1.8 V programming and stores both instructions and operands; SRAM provides deterministic access for real-time stacks and buffers without cache-related jitter.

Which communication interfaces does the R5F51105ADFM#30 provide, and what are their key capabilities?

The R5F51105ADFM#30 provides three SCI channels (two SCIe, one SCIf), one I²C bus interface (RIIC) supporting 400 kbps and SMBus, and one RSPI channel capable of 16 Mbps. All interfaces support flexible data formats (LSB/MSB first), programmable bit widths (8–32 bits), and hardware-triggered transfers-enabling robust connectivity to sensors, displays, and wireless modules.

What low-power modes are available on the R5F51105ADFM#30, and what is the lowest achievable current draw?

The R5F51105ADFM#30 offers three low-power modes: Sleep, Deep Sleep, and Software Standby. In Software Standby mode-with RTC active and all clocks stopped-the device draws just 0.35 μA typical. Wake-up occurs in 4.8 μs via RTC alarm, external interrupt, or pin change, making it ideal for battery-critical applications.