Renesas R5F51113ADNF#U0

Overview

R5F51113ADNF#U0 from Renesas Electronics is a 32-bit RX111 Group microcontroller featuring a 32 MHz max CPU clock, 128 KB on-chip Flash memory with SuperFlash® technology, and 16 KB RAM. It integrates UART, I²C, SPI, 12-bit ADC (12 channels), and low-power modes for battery-operated sensor nodes and industrial control interfaces.

For engineers reviewing the R5F51113ADNF#U0 datasheet, R5F51113ADNF#U0 pinout, R5F51113ADNF#U0 application, or R5F51113ADNF#U0 equivalent, key selection criteria include its 48-pin LQFP package, 1.8–3.6 V operating voltage, cold/warm start detection, sub-clock initialization requirement, and support for USB device interface via internal transceiver.

Technical Context

The R5F51113ADNF#U0 implements the RXv1 core with 3-stage pipeline, supports little-endian mode only, and includes a dedicated interrupt controller with up to 128 vector entries. Its clock system integrates PLL, main clock oscillator (4–20 MHz), sub-clock oscillator (32.768 kHz), and internal low-speed oscillator (15 kHz).

Peripheral integration includes a 16-bit multifunction timer (MTU), watchdog timer (independent and windowed), CRC calculation unit, and power management features such as deep software standby mode with RTC wake-up. The device requires explicit initialization of the sub-clock control circuit at cold start-even when the sub-clock is unused.

Key Specifications

Pinout & Package

Package: 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level (MSL) 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit microcontroller applications.

Compared with R5F51115ADNF#U0 and R5F51111ADNF#U0, the R5F51113ADNF#U0 offers balanced Flash capacity (128 KB) for mid-tier embedded applications-enough for USB HID + sensor fusion without over-provisioning silicon area or cost.

Availability

R5F51113ADNF#U0 is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human interface devices, and smart meter interface modules requiring stable component supply across multi-year production cycles.

Supply support for R5F51113ADNF#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 Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RX111 Group is designed for ultra-low-power, cost-sensitive 32-bit applications requiring rich peripheral integration-including USB, ADC, and communication interfaces-in compact packages.

FAQ

What is the maximum operating frequency of the R5F51113ADNF#U0?

The R5F51113ADNF#U0 operates at a maximum CPU clock frequency of 32 MHz. This speed is achieved using the on-chip PLL with an external main clock input (4–20 MHz). The 32 MHz limit defines timing budgets for all peripherals-including UART baud generation, ADC conversion time, and timer resolution-and is validated across the full −40 °C to +85 °C temperature range.

Does the R5F51113ADNF#U0 support USB host functionality?

No, the R5F51113ADNF#U0 supports USB device mode only via its integrated full-speed transceiver. It does not include USB host controller logic or OTG capability. Applications requiring host functionality-such as reading USB flash drives-must use an external USB host IC or select a higher-tier RX device like the RX65N series. The R5F51113ADNF#U0's USB interface is optimized for HID, CDC, and MSC class-compliant peripheral roles.

Is external crystal required for the sub-clock oscillator on the R5F51113ADNF#U0?

Yes, the R5F51113ADNF#U0 requires a 32.768 kHz crystal connected to XTAL/EXTAL pins for sub-clock operation. Even if the sub-clock is unused, the sub-clock control circuit must be explicitly initialized at cold start per the RX111 Hardware User's Manual. Omitting this initialization may cause unpredictable behavior during power-up sequences or RTC-related functions.

What Flash endurance specification applies to the R5F51113ADNF#U0?

The R5F51113ADNF#U0 uses SuperFlash® technology with guaranteed endurance of 100,000 write/erase cycles per block. This specification is measured under standard conditions (VDD = 3.3 V, TA = 25 °C) and applies to all 128 KB of on-chip Flash. Background operation (BGO) allows firmware updates without halting CPU execution, preserving real-time responsiveness during field upgrades of the R5F51113ADNF#U0.

How many ADC input channels does the R5F51113ADNF#U0 support?

The R5F51113ADNF#U0 integrates a 12-bit successive approximation register (SAR) ADC with 12 selectable analog input channels. These channels are mapped to specific GPIO pins (e.g., AN0–AN11), and the ADC supports programmable sample-and-hold time, hardware trigger sources (e.g., timer match), and scan mode for sequential conversions. All 12 channels are simultaneously available in the 48-pin LQFP package of the R5F51113ADNF#U0.