Renesas R5F10WMEAFA#50

Overview

R5F10WMEAFA#50 from Renesas is an RL78/L13 80-pin LQFP microcontroller with integrated LCD controller/driver, 48 KB flash, 2 KB RAM, and 4 KB data flash. It operates from 1.6 V to 5.5 V, delivers 31 DMIPS at 24 MHz, and achieves ultra-low power consumption (71 μA/MHz active, 0.61 μA in RTC+LVD mode), targeting battery-powered LCD-based instrumentation and industrial HMI panels.

For engineers reviewing the R5F10WMEAFA#50 datasheet, R5F10WMEAFA#50 pinout, R5F10WMEAFA#50 application, or R5F10WMEAFA#50 equivalent, this page provides verified technical context, validated pin functions, real-world use cases for LCD-driven metering and remote control interfaces, and confirmed alternative parts with documented functional trade-offs.

Technical Context

The R5F10WMEAFA#50 implements the RL78 CPU core-a CISC architecture with 3-stage pipeline-supporting instruction execution times from 0.04167 µs (24 MHz on-chip oscillator) to 30.5 µs (32.768 kHz subsystem clock). Its memory map spans 1 MB address space with banked 8-bit general-purpose registers.

It integrates dual-clock domain operation: high-speed main system clock (up to 24 MHz via on-chip oscillator or external crystal) and independent 32.768 kHz subsystem clock for RTC2 and low-power modes. The LCD controller supports up to 51 segment × 4 common outputs using internal voltage boosting or external resistor division.

Key Specifications

Pinout & Package

Package: 80-pin plastic LQFP (14 × 14 mm, 0.65 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10WMEAFA#50, R5F10WMEAGB#50 offers guaranteed operation up to +105°C but requires no PCB changes, while R5F10WMFAFA#50 provides 48 KB more flash for complex feature sets-both retain identical peripheral configuration and LCD timing behavior.

Availability

R5F10WMEAFA#50 is available at Aetrix Electronics and suitable for smart metering, industrial HMI, and portable medical devices requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10WMEAFA#50 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 RL78/L13 product line targets ultra-low-power LCD-based applications-including utility meters, thermostats, and handheld instruments-by integrating display drivers, precision timing, and robust mixed-signal peripherals into a single chip.

FAQ

What is the maximum operating frequency of the R5F10WMEAFA#50?

The R5F10WMEAFA#50 supports up to 24 MHz operation using its high-accuracy on-chip oscillator (±1.0% over VDD = 1.8–5.5 V and TA = –20 to +85°C). External crystal operation is rated up to 20 MHz in HS mode. This enables 31 DMIPS performance while maintaining ultra-low power efficiency at 71 μA/MHz.

Does the R5F10WMEAFA#50 support LIN bus communication?

Yes, the R5F10WMEAFA#50 supports LIN bus communication through UART2, which is explicitly designated as LIN-capable in the RL78/L13 datasheet. It includes LINSEL pin functionality and meets ISO 17987-4 electrical requirements when paired with an external LIN transceiver. No additional firmware library is required for basic LIN 2.2 frame handling.

How many LCD segments can the R5F10WMEAFA#50 drive, and what methods does it support?

The R5F10WMEAFA#50 drives up to 51 segment outputs with 4 common lines (expandable to 8 commons), enabling up to 204-segment static or multiplexed LCDs. It supports three bias generation methods: internal voltage boosting (for low-component-count designs), capacitor split (for medium-voltage displays), and external resistance division (for high-contrast or wide-temp-range panels).

What debug interface does the R5F10WMEAFA#50 provide?

The R5F10WMEAFA#50 includes a full on-chip debug function accessible via the TOOL0, TOOLRxD, and TOOLTxD pins. It supports breakpoints, watchpoints, memory/register access, and flash programming through Renesas E2 emulator or compatible debug probes-no external JTAG adapter is needed, simplifying development and field firmware updates.

Is the R5F10WMEAFA#50 pin-compatible with other RL78/L13 variants in the 80-pin LQFP package?

Yes, all 80-pin RL78/L13 variants-including R5F10WMEAFA#50, R5F10WMFAFA#50, and R5F10WMEAGB#50-share identical pinouts and package dimensions (14 × 14 mm, 0.65 mm pitch LQFP). Firmware and hardware designs are interchangeable across flash/RAM variants, enabling scalable product families with minimal layout changes.