Renesas R5F51115ADFM#1A

Overview

R5F51115ADFM#1A from Renesas is a 32-bit RX CPU-based microcontroller with 128 KB on-chip flash, 16 KB SRAM, and 8 KB data flash, operating at up to 32 MHz (50 DMIPS), featuring USB 2.0 full-speed host/function/OTG, 12-bit A/D converter (14 channels), and RTC - deployed in industrial HMI, sensor gateway, and low-power USB peripheral control.

For engineers reviewing the R5F51115ADFM#1A datasheet, R5F51115ADFM#1A pinout, R5F51115ADFM#1A application, or R5F51115ADFM#1A equivalent, key selection criteria include USB OTG support with BC detection, 32 MHz operation under 1.8–3.6 V supply, software standby mode (0.44 μA), 14-channel 12-bit ADC with 1.0 μs conversion, and 64-pin LFQFP (PLQP0064KB-A) package compatibility.

Technical Context

The R5F51115ADFM#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. It integrates an Event Link Controller (ELC) enabling direct module-to-module triggering without CPU intervention, and a Data Transfer Controller (DTC) supporting chain transfers triggered by 82 interrupt sources.

Its clock system includes independent PLL, high-speed on-chip oscillator (32 MHz ±1% over −40 to +85°C), sub-clock (32.768 kHz), and dedicated IWDT oscillator (15 kHz), with programmable clock domain division (ICLK, PCLK, FCLK). Power management supports three low-power modes including software standby with 4.8 μs wake-up and 0.44 μA quiescent current.

Key Specifications

Pinout & Package

Package: PLQP0064KB-A - 64-pin Low-Profile Quad Flat Package, 10 × 10 mm body, 0.5 mm pitch, lead-free (Sn only), RoHS compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F51115ADFM#1A, the ADLK variant offers identical functionality in a smaller WFLGA package for miniaturized designs, while the ADFK variant provides mechanical robustness and thermal margin in larger industrial enclosures - all three share identical flash/SRAM, USB, ADC, and low-power behavior.

Availability

R5F51115ADFM#1A is available at Aetrix Electronics and suitable for industrial HMI, sensor gateway, and low-power USB peripheral applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for R5F51115ADFM#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, including R5F51115ADFM#1A, was designed for cost-sensitive, low-power embedded applications demanding USB connectivity, rich analog integration, and functional safety support - targeting industrial control, building automation, and portable instrumentation.

FAQ

What is the maximum operating frequency and power supply range for R5F51115ADFM#1A?

R5F51115ADFM#1A operates at up to 32 MHz when powered from 2.7–3.6 V, 16 MHz at 2.4–2.7 V, and 8 MHz at 1.8–2.4 V. Its supply voltage range is 1.8–3.6 V, with separate VCC_USB and VSS_USB pins for USB transceiver isolation. The high-speed on-chip oscillator delivers 32 MHz ±1% accuracy across −40 to +85°C, eliminating need for external crystal in many USB applications.

Does R5F51115ADFM#1A support USB On-The-Go (OTG) and Battery Charging (BC) detection?

Yes, R5F51115ADFM#1A integrates full USB 2.0 host/function/OTG capability with BC 1.2 compliance. It detects SDP, CDP, and DCP chargers via USB0_ID, USB0_VBUS, and internal charge-detection logic. The USB module supports isochronous transfers and OTG session request protocol (SRP) - enabling dual-role operation without external PHY or charging IC.

How many A/D converter channels does R5F51115ADFM#1A support, and what is its minimum conversion time?

R5F51115ADFM#1A supports 14 channels of 12-bit A/D conversion. Minimum conversion time is 1.0 μs per channel when ADCLK runs at 32 MHz. It also supports double-trigger mode for synchronized sampling - critical for motor control phase current measurement - and accepts start triggers from software, MTU timers, ELC events, or external pins like ADTRG0#.

What low-power modes are available on R5F51115ADFM#1A, and what is the lowest current consumption?

R5F51115ADFM#1A offers three low-power modes: sleep, deep sleep, and software standby. Software standby achieves 0.44 μA typical current draw with RTC and data flash retention enabled. Wake-up occurs in 4.8 μs via RTC alarm, external interrupt, or USB resume - making it ideal for battery-powered sensor nodes requiring multi-year operation.

Is the R5F51115ADFM#1A pin-compatible with other RX111 Group MCUs in the same package?

Yes, all RX111 Group MCUs in the PLQP0064KB-A package - including R5F51115ADFM#1A, R5F51116ADFM#3A, and R5F51118ADFM#3A - share identical pinouts and electrical characteristics. Firmware and PCB layouts are interchangeable across memory variants (128 KB to 512 KB flash), enabling scalable design reuse without hardware revision.