Renesas R5F10WLDAFA#50

Overview

R5F10WLDAFA#50 from Renesas is a 64-pin LQFP (12 × 12 mm, 0.65 mm pitch), 48 KB flash, 1.5 KB RAM RL78/L13 microcontroller with integrated LCD controller/driver (36 segment / 4 common outputs), 9-channel 8/10-bit ADC, and ultra-low-power operation down to 71 μA/MHz - designed for battery-powered LCD display systems in consumer-grade metering and home appliances.

For engineers reviewing the R5F10WLDAFA#50 datasheet, R5F10WLDAFA#50 pinout, R5F10WLDAFA#50 application, or R5F10WLDAFA#50 equivalent, key selection criteria include its 48 KB code flash + 4 KB data flash memory layout, 64-pin LQFP package with dedicated LCD segment/common drivers, 1.6–5.5 V single-supply operation, and support for STOP/HALT/SNOOZE low-power modes in -40°C to +85°C ambient.

Technical Context

The R5F10WLDAFA#50 implements the RL78 CPU core - a CISC architecture with 3-stage pipeline and configurable instruction execution time (0.04167 µs at 24 MHz, 30.5 µs at 32.768 kHz). It integrates a 16-bit timer array unit (8 channels), real-time clock 2 (calendar, alarm, correction), and dual comparators with selectable internal/external reference voltages.

Its peripheral set includes three UART channels (one LIN-capable), two simplified SPI (CSI) interfaces, one I²C-compatible interface, DMA controller (4 channels), and programmable clock/buzzer output - all managed via peripheral I/O redirection register (PIOR) for flexible pin assignment without PCB redesign.

Key Specifications

Pinout & Package

64-pin plastic LQFP (12 × 12 mm, 0.65 mm pitch); REGC must be connected to VSS via 0.47–1 μF capacitor.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10WLEAFA#50, the R5F10WLDAFA#50 trades 16 KB flash for lower cost and identical low-power LCD capability; versus R5F10WMDAFA#50, it offers pin-compatible LCD functionality in a smaller 64-pin footprint but lacks the 80-pin variant's expanded analog and serial resources.

Availability

R5F10WLDAFA#50 is available at Aetrix Electronics and suitable for smart energy meters, home appliance control panels, and portable medical device UIs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10WLDAFA#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 targets ultra-low-power, LCD-centric applications - combining true low-power architecture, integrated display drivers, and robust analog peripherals for cost-sensitive consumer and industrial HMI designs.

FAQ

What is the maximum operating frequency and corresponding current consumption of the R5F10WLDAFA#50?

The R5F10WLDAFA#50 achieves 31 DMIPS at 24 MHz using its high-speed on-chip oscillator. At this frequency, typical active current is 71 μA/MHz (≈1.7 mA total), verified per datasheet Rev.2.32 Section 2. Electrical Specifications. The MCU maintains full peripheral functionality including LCD refresh and ADC sampling at 24 MHz.

Does the R5F10WLDAFA#50 support in-circuit debugging, and what interface is used?

Yes, the R5F10WLDAFA#50 includes an on-chip debug function accessible via the TOOLRxD/TOOLTxD pins (P17/P00) using Renesas E2 emulator or E2 Lite. Debug operations include breakpoint setting, memory inspection, and real-time variable monitoring without halting RTC or LVD functions - critical for time-sensitive LCD applications.

How many LCD segments and commons does the R5F10WLDAFA#50 drive, and are bias methods configurable?

The R5F10WLDAFA#50 drives up to 36 segment and 4 common outputs. Bias configuration is fully programmable: internal voltage boosting (for low-VDD operation), capacitor split (for medium-resolution panels), or external resistor division (for high-contrast static displays) - selected via LCD control registers without external component changes.

What are the key differences between the R5F10WLDAFA#50 and R5F10WLDAFB#50?

The R5F10WLDAFA#50 uses a 64-pin LQFP (0.65 mm pitch), while R5F10WLDAFB#50 uses a 64-pin LFQFP (0.50 mm pitch). Both share identical electrical specs, memory, peripherals, and temperature grade (A: -40°C to +85°C), but differ in mechanical footprint - FB requires finer-pitch PCB layout and reflow profile. No functional or software differences exist.

Can the R5F10WLDAFA#50 operate reliably at 1.6 V, and which peripherals remain functional?

Yes, the R5F10WLDAFA#50 is fully specified down to 1.6 V (TA = -40°C to +85°C). At this voltage, the CPU, 48 KB flash, 1.5 KB RAM, LCD controller/driver, 9-channel ADC (with internal reference disabled), and STOP/HALT modes remain operational. UART and CSI require ≥1.8 V; LVD threshold steps are preserved across the full 1.6–5.5 V range.