Renesas R5F10WMDAFA#50

Overview

R5F10WMDAFA#50 from Renesas is an RL78/L13 80-pin LQFP microcontroller with integrated LCD controller/driver, 32 KB flash, 4 KB data flash, 1.5 KB RAM, and true low-power operation (71 μA/MHz active, 0.61 μA RTC+LVD). It supports 1.6–5.5 V supply, 24 MHz max CPU speed (31 DMIPS), and targets battery-powered LCD-based consumer devices such as thermostats, blood glucose meters, and portable medical displays.

For engineers reviewing the R5F10WMDAFA#50 datasheet, R5F10WMDAFA#50 pinout, R5F10WMDAFA#50 application, or R5F10WMDAFA#50 equivalent, key selection criteria include its 51-segment/8-common LCD drive capability, dual UART + LIN support, 12-channel 10-bit ADC, ultra-low-power STOP/HALT modes, and industrial-grade temperature range compatibility when configured for A-grade operation.

Technical Context

The R5F10WMDAFA#50 implements the RL78 CISC core with 3-stage pipeline, 1 MB address space, and configurable clock system including high-speed on-chip oscillator (±1.0% accuracy at 24 MHz) and 32.768 kHz subsystem clock. It integrates a dedicated 16-bit timer KB20 for PWM output and supports background data flash rewriting via BGO.

Its peripheral set includes 4-channel DMA, 8-channel 16-bit TAU timer, 2-channel comparator with selectable internal/external reference, and programmable buzzer/clock output. The LCD controller supports three voltage-boosting methods-internal capacitor split, external resistor division, and internal voltage boosting-for flexible segment bias generation across varying display types.

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 R5F10WMDAFA#50, the R5F10WMEAFA#50 offers double flash and RAM for feature-rich firmware, while the R5F10WMCAFA#50 reduces memory capacity by 50% to lower unit cost - both retain identical LCD drive, power profile, and peripheral compatibility for seamless migration.

Availability

R5F10WMDAFA#50 is available at Aetrix Electronics and suitable for smart thermostat displays, portable medical monitors, and industrial panel meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10WMDAFA#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 delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.

The RL78/L13 product line delivers ultra-low-power, LCD-optimized MCUs targeting battery-operated consumer and medical devices where display integration, energy efficiency, and small form factor are critical.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F10WMDAFA#50?

The R5F10WMDAFA#50 operates up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its minimum instruction execution time is 0.04167 µs under this condition. The core maintains full functionality across its 1.6–5.5 V supply range, with timing specifications guaranteed per Renesas datasheet R01DS0168EJ0232 Rev.2.32.

Does the R5F10WMDAFA#50 support hardware-based data flash rewriting during program execution?

Yes, the R5F10WMDAFA#50 supports Background Operation (BGO) for data flash. This allows the CPU to execute instructions from code flash while simultaneously rewriting data flash memory - enabling safe firmware parameter updates or logging without halting application logic. The data flash endurance is rated at 1,000,000 write cycles (typical).

How many LCD segments and commons does the R5F10WMDAFA#50 support, and what bias methods are available?

The R5F10WMDAFA#50 supports up to 51 segment outputs and 4 common outputs (or 47 segments with 8 commons). It provides three configurable LCD bias generation methods: internal voltage boosting, capacitor split, and external resistance division - allowing optimization for display type, contrast, and power consumption without external components.

What are the key low-power modes supported by the R5F10WMDAFA#50, and what is the typical current draw in each?

The R5F10WMDAFA#50 supports HALT, STOP, and SNOOZE modes. In STOP mode with RTC + LVD active, it draws just 0.61 μA (typical). Active-mode current is 71 μA/MHz. These values are measured at VDD = 3.0 V, TA = 25°C per datasheet R01DS0168EJ0232 Rev.2.32 and enable multi-year operation on coin-cell batteries.

Can the R5F10WMDAFA#50 drive a 32.768 kHz crystal for real-time clock operation?

Yes, the R5F10WMDAFA#50 includes dedicated XT1 and XT2 pins for connecting a 32.768 kHz crystal to implement the subsystem clock and Real-Time Clock 2 (RTC2). The RTC2 module provides calendar functions for 99 years, alarm, and clock correction - all operational in STOP mode with only 0.61 μA current draw.