Renesas R5F51115ADFL#1A

Overview

R5F51115ADFL#1A from Renesas is a 32-bit RX CPU-based microcontroller operating at up to 32 MHz (50 DMIPS), featuring 128 KB on-chip flash, 16 KB SRAM, and 8 KB data flash. It integrates a 12-bit A/D converter (14 channels, 1.0 µs conversion), USB 2.0 full-speed host/function/OTG, RTC with calendar mode, and operates from 1.8–3.6 V across −40 to +85°C - deployed in industrial sensor nodes and USB-connected embedded controllers.

For engineers reviewing the R5F51115ADFL#1A datasheet, R5F51115ADFL#1A pinout, R5F51115ADFL#1A application, or R5F51115ADFL#1A equivalent, key selection criteria include its 48-pin LFQFP (PLQP0048KB-A) package, USB OTG support with BC detection, dual 8-bit D/A outputs, ELC-triggered peripheral operation without CPU wake-up, and IEC 60730-compliant safety features including CAC and IWDT.

Technical Context

The R5F51115ADFL#1A implements a CISC Harvard-architecture RX core with five-stage pipeline, variable-length instructions, and 64-bit accumulator for single-cycle 32×32 multiply-accumulate operations. Its clock system includes independent ICLK/PCLK/FCLK domains, high-speed on-chip oscillator (32 MHz ±1%), sub-clock (32.768 kHz), and PLL input range of 4–8 MHz.

Peripheral coordination is managed via Event Link Controller (ELC), enabling direct module-to-module triggering (e.g., MTU timer → A/D start) while CPU remains in software standby mode. The Data Transfer Controller (DTC) supports chain transfers across four modes, activated by 82 interrupt vectors including nine external IRQ pins and NMI.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (PLQP0048KB-A), 7 × 7 mm body, 0.5 mm pitch, exposed pad not specified, RoHS-compliant Sn-only terminal finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51115ADFL#1A, the R5F51115ADFM#3A offers greater I/O scalability in a larger package, while R5F51113ADFL#3A reduces memory cost without altering peripheral capability - enabling tiered product variants from a single hardware design platform.

Availability

R5F51115ADFL#1A is available at Aetrix Electronics and suitable for industrial sensor nodes, USB-connected data loggers, and IEC 60730-certified appliance modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F51115ADFL#1A 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 RX111 Group targets cost-optimized, low-power embedded applications demanding USB connectivity, analog integration, and functional safety - with R5F51115ADFL#1A delivering balanced performance, peripheral richness, and qualification for industrial temperature operation.

FAQ

What is the maximum operating frequency and core performance of the R5F51115ADFL#1A?

The R5F51115ADFL#1A operates at a maximum frequency of 32 MHz and delivers 50 DMIPS of processing performance. Its 32-bit RX CPU core features a five-stage pipeline, variable-length instruction encoding, and a 64-bit accumulator enabling single-cycle 32×32 multiply-accumulate operations - making it suitable for real-time control and signal processing tasks within the R5F51115ADFL#1A's power envelope.

Does the R5F51115ADFL#1A support USB On-The-Go (OTG) functionality?

Yes, the R5F51115ADFL#1A integrates a USB 2.0 host/function module that fully supports OTG operation, including BC (Battery Charger) detection per USB BC 1.2. It provides full-speed (12 Mbps) and low-speed (1.5 Mbps) modes, isochronous transfers, and dual-role capability - allowing the R5F51115ADFL#1A to act as either a USB device or host depending on VBUS and ID pin states.

What are the memory resources available on the R5F51115ADFL#1A?

The R5F51115ADFL#1A includes 128 KB of on-chip flash memory (zero wait states at 32 MHz), 16 KB of SRAM (also zero wait states), and 8 KB of data flash rated for 1,000,000 erase/write cycles. The data flash supports Background Operation (BGO), enabling concurrent program execution and nonvolatile parameter storage - a key feature for firmware updates and calibration data retention in the R5F51115ADFL#1A.

How does the R5F51115ADFL#1A achieve low-power operation in battery-powered systems?

The R5F5115ADFL#1A achieves ultra-low-power operation through three dedicated low-power modes: software standby (0.44 µA), deep sleep, and sleep. Recovery from software standby takes just 4.8 µs, and the high-speed on-chip oscillator (32 MHz ±1%) eliminates external crystal startup delay. These capabilities allow the R5F51115ADFL#1A to maintain responsiveness while extending battery life in portable and remote sensing applications.

Is the R5F51115ADFL#1A qualified for industrial temperature operation?

Yes, the R5F51115ADFL#1A is rated for operation from −40 to +85°C (D version), meeting industrial-grade reliability requirements. It incorporates multiple voltage detection circuits (LVDA), independent watchdog timer (IWDT) with dedicated 15 kHz oscillator, and Clock Accuracy Measurement circuit (CAC) - features aligned with IEC 60730 Class B compliance for safety-critical embedded control in the R5F51115ADFL#1A's target applications.