Renesas R5F10WMFAFA#10

Overview

R5F10WMFAFA#10 from Renesas is an 80-pin LQFP (14 × 14 mm, 0.65 mm pitch) RL78/L13 16-bit MCU with 96 KB flash, 4 KB data flash, 6 KB RAM, integrated LCD controller/driver (51 segment/8 common), and ultra-low power operation down to 71 μA/MHz. It features a 24 MHz high-accuracy on-chip oscillator (±1.0%), 12-channel 8/10-bit ADC, dual comparators, and real-time clock 2 with calendar and alarm - designed for battery-powered LCD-based consumer instrumentation.

For engineers reviewing the R5F10WMFAFA#10 datasheet, R5F10WMFAFA#10 pinout, R5F10WMFAFA#10 application, or R5F10WMFAFA#10 equivalent, this page delivers verified technical context, validated pin functions, exact memory mapping, confirmed LCD drive capability, and real-world selection guidance for metering, thermostat, and portable HMI designs.

Technical Context

The R5F10WMFAFA#10 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and 1 MB address space. It supports four clock domains: high-speed main (up to 24 MHz), subsystem (32.768 kHz), low-speed on-chip (15 kHz), and external crystal (X1/X2, XT1/XT2).

Its peripheral set includes 8-channel 16-bit Timer Array Unit (TAU), 1-channel 16-bit timer KB20, 4-channel DMA, UART0–UART3 (with LIN support), CSI0/CSI1, IICA0/IICA1, and full LCD controller with internal voltage boosting, capacitor split, and external resistor division modes - all operating across 1.6 V to 5.5 V supply range.

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#10, the R5F10WMFAFA#10 adds 48 KB flash and 4 KB RAM while retaining identical peripheral sets and pinout - enabling scalable firmware development without layout change. Against R5F10WMGAFA#10, it offers optimal balance of memory, cost, and thermal profile for mid-tier consumer HMI.

Availability

R5F10WMFAFA#10 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10WMFAFA#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 Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L13 product line targets ultra-low-power LCD-based human-machine interfaces, emphasizing integrated display control, extended battery life, and simplified system design for consumer and industrial instrumentation.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F10WMFAFA#10?

The R5F10WMFAFA#10 features a high-speed on-chip oscillator configurable up to 24 MHz with ±1.0% accuracy across VDD = 1.8–5.5 V and TA = –20 to +85°C. This eliminates need for external crystals in cost-sensitive applications while maintaining timing integrity for UART and LCD frame rates.

Does R5F10WMFAFA#10 support hardware-based LCD bias generation without external components?

Yes, the R5F10WMFAFA#10 integrates three LCD bias methods: internal voltage boosting, capacitor split, and external resistor division. When using internal boost mode, no external charge pump or bias resistors are required - reducing BOM count and board space for segment LCDs up to 51×8.

How many ADC channels and what resolution does R5F10WMFAFA#10 provide?

The R5F10WMFAFA#10 includes a 12-channel 8/10-bit successive approximation ADC with selectable resolution. Input channels include ANI0–ANI1, ANI16–ANI25, and internal references (1.45 V, temperature sensor). Conversion time is 1.2 μs per sample at 10-bit resolution.

Can R5F10WMFAFA#10 execute code while rewriting data flash memory?

Yes, the R5F10WMFAFA#10 supports Background Operation (BGO) for data flash. Instructions can be fetched and executed from code flash while simultaneously rewriting the 4 KB data flash - enabling seamless firmware parameter updates without interrupting real-time tasks like LCD refresh or sensor polling.

What is the lowest power consumption state supported by R5F10WMFAFA#10 with RTC and LVD active?

The R5F10WMFAFA#10 achieves 0.61 μA in STOP mode with Real-Time Clock 2 (RTC2) and Low-Voltage Detector (LVD) enabled. This state retains RAM contents and allows wake-up via RTC alarm, key interrupt (INTP0–INTP7), or external reset - ideal for decade-long battery operation in maintenance-free devices.