Renesas R5F110NEALA#W0

Overview

R5F110NEALA#W0 from Renesas is an ultra-low-power 16-bit RL78/L1C microcontroller with integrated LCD controller/driver (44–56 segment, 4–8 common), 12-bit A/D converter (12-channel, 2.4–3.6 V range), USB 2.0 function controller (full-speed/low-speed), and 96 KB flash memory. It operates from 1.6 to 3.6 V, achieves 33 DMIPS at 24 MHz, and targets battery-powered LCD-based human interface devices such as smart meters and portable medical displays.

For engineers reviewing the R5F110NEALA#W0 datasheet, R5F110NEALA#W0 pinout, R5F110NEALA#W0 application, or R5F110NEALA#W0 equivalent, key selection criteria include its VFLGA-85 package footprint, USB 2.0 functional capability (not host), true low-power modes (0.68 μA RTC+LVD), and LCD drive flexibility (capacitor-split/internal-boost).

Technical Context

The R5F110NEALA#W0 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.04167 μs min @ 24 MHz to 30.5 μs @ 32.768 kHz). It integrates a dedicated LCD controller supporting internal voltage boosting, capacitor-split, and external resistor division methods - enabling direct drive of up to 56×8-segment displays without external bias circuitry.

Its peripheral set includes four UART/LIN channels, five I²C interfaces, four CSI (SPI-like) channels, eleven 16-bit timers, real-time clock 2 (RTC2) with calendar and alarm, and a 2-channel comparator. USB functionality is implemented as a full-speed/low-speed device controller compliant with Battery Charging Specification Rev. 1.2 - not a host or OTG controller.

Key Specifications

Pinout & Package

Package: 85-pin plastic VFLGA (7 × 7 mm, 0.65 mm pitch), tape-and-reel packaging (#W0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F110NEALA#W0, R5F110NFALA#W0 offers higher memory capacity for feature-rich firmware, while R5F111NEALA#W0 removes USB entirely to lower cost and simplify design - both retain identical LCD, ADC, and low-power capabilities.

Availability

R5F110NEALA#W0 is available at Aetrix Electronics and suitable for smart energy metering, portable medical devices, industrial HMI panels, and home appliance control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F110NEALA#W0 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 RL78/L1C product line is engineered specifically for ultra-low-power LCD-based applications - integrating high-efficiency LCD driving, precision analog, and USB connectivity into a single chip for metering, healthcare, and consumer HMI designs.

FAQ

What is the maximum LCD segment count supported by the R5F110NEALA#W0?

The R5F110NEALA#W0 supports up to 56 segment outputs and 8 common outputs. When configured for 8-common operation, it drives up to 52 segments (as noted in datasheet footnote 2); with 4-common, it supports up to 56 segments. The exact count depends on the selected LCD bias method and COM/SEG mapping in the LCD control registers.

Does the R5F110NEALA#W0 support USB host functionality?

No, the R5F110NEALA#W0 implements only USB 2.0 function (device) controller logic - it cannot act as a USB host or OTG controller. It supports full-speed (12 Mbps) and low-speed (1.5 Mbps) device modes and complies with Battery Charging Specification Rev. 1.2 for charging-aware enumeration.

What are the voltage requirements for the 12-bit A/D converter on the R5F110NEALA#W0?

The 12-bit A/D converter in the R5F110NEALA#W0 requires VDD ≥ 2.4 V for full 12-bit operation. At VDD = 1.6–2.3 V, the ADC operates in 8/10-bit mode only. The internal reference voltage is typically 1.45 V, and the integrated temperature sensor is calibrated for use across the full operating temperature range (−40 to +85°C).

Can the R5F110NEALA#W0 operate without an external crystal?

Yes, the R5F110NEALA#W0 can operate fully without external crystals. Its high-speed on-chip oscillator supports 1–48 MHz (±1.0% accuracy), and the low-speed on-chip oscillator drives the RTC2 and watchdog timer. External crystals (X1/X2 or XT1/XT2) are optional for higher timing precision or USB suspend/resume synchronization.

What is the purpose of the CAPH and CAPL pins on the R5F110NEALA#W0?

CAPH and CAPL are dedicated pins for connecting external capacitors in capacitor-split LCD bias configuration. This method eliminates external resistors and provides stable, temperature-insensitive LCD voltage division - critical for consistent contrast in battery-powered devices across varying temperatures and supply voltages.