Renesas R5F110MEAFB#10

Overview

R5F110MEAFB#10 from Renesas is an ultra-low-power 16-bit RL78/L1C microcontroller with integrated LCD controller/driver (44 segment × 4 common), 12-bit A/D converter (12-channel, 2.4–3.6 V range), USB 2.0 function controller (full/low-speed), and 64 KB flash memory. It operates from 1.6–3.6 V, achieves 33 DMIPS at 24 MHz, and targets battery-powered LCD-based medical devices, home appliances, and industrial control panels.

For engineers reviewing the R5F110MEAFB#10 datasheet, R5F110MEAFB#10 pinout, R5F110MEAFB#10 application, or R5F110MEAFB#10 equivalent, key selection criteria include its USB 2.0 support, true low-power modes (0.68 μA RTC+LVD), on-chip LCD driving capability, and 80-pin LFQFP package with verified segment/com port mapping for direct glass interface.

Technical Context

The R5F110MEAFB#10 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 44 segments and 4 commons without external bias circuitry.

Its peripheral set includes four UART/LIN channels, five I²C interfaces, four CSI/SPI channels, eleven 16-bit timers, real-time clock 2 (RTC2) with calendar and alarm, and a dual-channel comparator. The USB 2.0 function controller supports Battery Charging Specification Rev. 1.2 and operates in HS (high-speed main) mode only.

Key Specifications

Pinout & Package

Package: 80-pin plastic LFQFP (12 × 12 mm, 0.5 mm pitch), RoHS-compliant, consumer-grade (TA = −40 to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F110MEAFB#10, R5F110MGAFB#10 offers scalable code space without changing footprint, while R5F111MEAFB#10 removes USB-related design constraints - enabling simpler compliance testing and lower system-level noise in sensitive analog environments.

Availability

R5F110MEAFB#10 is available at Aetrix Electronics and suitable for medical glucose meters, smart thermostats, and industrial panel meters requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for R5F110MEAFB#10 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, and power solutions for automotive, industrial, and IoT markets.

The RL78/L1C product line is designed specifically for ultra-low-power LCD-based human interface applications - integrating display driving, precision analog, and USB connectivity into a single chip to minimize system cost and board area.

FAQ

What is the maximum LCD segment count supported by the R5F110MEAFB#10?

The R5F110MEAFB#10 supports up to 44 segment outputs and 4 common outputs (COM0–COM3), as confirmed in the datasheet's LCD controller section and pin configuration diagrams. This configuration enables driving standard 4-digit alphanumeric displays or custom icon-based UIs without external segment drivers. The actual usable segments depend on COM count selected - using 4 commons yields 44 segments; using 8 commons (not supported on this variant) would reduce segment count per common.

Does the R5F110MEAFB#10 support USB device enumeration without external components?

Yes, the R5F110MEAFB#10 includes a fully integrated USB 2.0 function controller with on-chip voltage regulator (requiring only UREGC capacitor) and differential transceivers (UDM/UDP). It supports full-speed (12 Mbps) and low-speed (1.5 Mbps) operation and complies with USB Battery Charging Specification Rev. 1.2 - enabling HID, CDC, or vendor-specific class enumeration directly from the chip without external PHY or level shifters.

What are the valid operating voltage ranges for the 12-bit A/D converter in the R5F110MEAFB#10?

The 12-bit A/D converter in the R5F110MEAFB#10 operates only within the 2.4 V to 3.6 V VDD range, as explicitly specified in the "A/D converter" feature list. Attempting 12-bit conversion below 2.4 V results in undefined accuracy; for 1.6–2.4 V operation, the A/D reverts to 8/10-bit mode. This voltage dependency ensures stable reference performance and matches the internal 1.45 V reference tolerance.

How does the R5F110MEAFB#10 achieve 0.68 μA standby current?

The R5F110MEAFB#10 achieves 0.68 μA in STOP mode by powering down the CPU core, flash, and most peripherals while retaining RTC2 (real-time clock with calendar), LVD (voltage detector), and SRAM retention. This state is enabled via software-controlled STOP instruction and requires no external circuitry - making it ideal for infrequently awakened sensor nodes or time-stamped event loggers where microseconds of wake latency are acceptable.

Is the R5F110MEAFB#10 pin-compatible with other RL78/L1C variants in the 80-pin LFQFP package?

Yes, all 80-pin RL78/L1C variants (e.g., R5F110MGAFB#10, R5F111MEAFB#10) share identical pinouts and mechanical footprint per the datasheet's "Pin Configuration (Top View)" section. Differences are limited to internal memory size, USB inclusion, and temperature grade - allowing hardware reuse across firmware variants and simplifying platform design for scalable product families.