Renesas R5F10WMDAFA#30

Overview

R5F10WMDAFA#30 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 ultra-low-power operation (71 μA/MHz active, 0.61 μA RTC+LVD). It supports 1.6–5.5 V supply, operates from −40°C to +85°C, and targets battery-powered LCD display systems such as smart meters and portable medical devices.

For engineers reviewing the R5F10WMDAFA#30 datasheet, R5F10WMDAFA#30 pinout, R5F10WMDAFA#30 application, or R5F10WMDAFA#30 equivalent, key selection criteria include its 51-segment/8-common LCD drive capability, dual UART + I²C + CSI interfaces, 12-channel 8/10-bit ADC, and hardware RTC with calendar and alarm-critical for human-interface and energy-conscious embedded designs.

Technical Context

The R5F10WMDAFA#30 implements the RL78 CPU core-a CISC architecture with 3-stage pipeline and configurable instruction timing (0.04167 µs min @24 MHz, 30.5 µs @32.768 kHz). It integrates a dedicated 16-bit timer KB20 for PWM output and a 12-bit interval timer, alongside dual clock domains: high-speed main (up to 24 MHz on-chip oscillator) and low-power subsystem (32.768 kHz crystal).

Its peripheral set is optimized for LCD-centric applications: programmable LCD voltage boosting (VL1–VL4), capacitor-split or resistor-division biasing, and 8-key interrupt inputs (KR0–KR7). The 4-channel DMA controller enables background data flash rewriting during program execution, supporting field firmware updates without halting real-time functions.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 × 14 mm, 0.65 mm pitch), RoHS-compliant, rated for −40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10WMDAFA#30, R5F10WMEAFA#30 offers scalable memory for feature-rich UIs, while R5F10WLDAFA#30 trades pin count and LCD capacity for lower PCB area and BOM cost-enabling tiered product variants from a common firmware base.

Availability

R5F10WMDAFA#30 is available at Aetrix Electronics and suitable for smart utility meters, portable medical devices, home appliance control panels, and industrial HMI modules requiring stable component supply across long production lifecycles.

Supply support for R5F10WMDAFA#30 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/L13 product line is designed specifically for ultra-low-power LCD-based human interface applications, integrating display control, sensing, and communication in a single chip to minimize system-level component count and power consumption.

FAQ

What is the maximum LCD segment count supported by the R5F10WMDAFA#30?

The R5F10WMDAFA#30 supports up to 51 segment outputs and 8 common outputs, enabling multiplexed drive of displays with up to 408 (51 × 8) segments. Configuration options include internal voltage boosting, capacitor-split, or external resistor-division bias methods-all selectable in firmware without hardware changes. This makes the R5F10WMDAFA#30 suitable for custom alphanumeric or graphical segment layouts in battery-powered devices.

Does the R5F10WMDAFA#30 support hardware RTC with calendar functionality?

Yes, the R5F10WMDAFA#30 includes Real-Time Clock 2 (RTC2) with full calendar support for years 2000–2099, alarm interrupt, and automatic clock correction. It operates independently in STOP mode using the 32.768 kHz subsystem clock and maintains time accuracy without external crystals or backup batteries. This RTC2 is integral to the R5F10WMDAFA#30's design for time-stamped logging and scheduling in metering and medical applications.

Can the R5F10WMDAFA#30 perform background data flash writes while executing code from main flash?

Yes, the R5F10WMDAFA#30 supports Background Operation (BGO) for data flash. While the CPU executes instructions from code flash, the data flash can be rewritten-enabling safe firmware updates, parameter storage, or event logging without halting real-time tasks. The R5F10WMDAFA#30 guarantees 1,000,000 write cycles and operates across the full 1.8–5.5 V VDD range, making it robust for field-upgradable embedded systems.

What are the key low-power modes available on the R5F10WMDAFA#30?

The R5F10WMDAFA#30 offers HALT (0.61 μA), STOP (0.23 μA), and SNOOZE modes. HALT stops the CPU but keeps peripherals running; STOP disables most clocks except RTC2 and LVD; SNOOZE allows selective peripheral wake-up (e.g., UART receive, key interrupt) while CPU remains halted. All modes retain RAM content and are entered via software instruction-critical for extending battery life in intermittent-activity applications using the R5F10WMDAFA#30.

How many UART interfaces does the R5F10WMDAFA#30 provide, and which support LIN?

The R5F10WMDAFA#30 provides three UART interfaces: UART0, UART1, and UART3. UART0 includes built-in LIN physical layer support (LINSEL pin), enabling direct connection to LIN bus networks without external transceivers. UART1 and UART3 operate as standard asynchronous interfaces. This triple-UART capability allows simultaneous communication with host controllers, sensors, and diagnostic tools-making the R5F10WMDAFA#30 ideal for layered communication architectures in automotive and industrial systems.