Renesas R5F10RLAAFA#V0

Overview

R5F10RLAAFA#V0 from Renesas is a 64-pin LQFP (12 × 12 mm, 0.65 mm pitch) 16-bit RL78/L12 microcontroller with 16 KB flash, 2 KB data flash, 1 KB RAM, integrated LCD controller/driver supporting up to 39 seg × 4 com or 35 seg × 8 com, and ultra-low-power operation (0.64 µA in RTC+LVD mode). It targets battery-powered LCD display applications such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RLAAFA#V0 datasheet, R5F10RLAAFA#V0 pinout, R5F10RLAAFA#V0 application, or R5F10RLAAFA#V0 equivalent, key selection criteria include its 24 MHz max CPU frequency (31 DMIPS), on-chip high-speed oscillator (±1% accuracy), 10-bit ADC with 10 channels, and support for capacitor-split and internal-boost LCD drive methods.

Technical Context

The R5F10RLAAFA#V0 implements the RL78 16-bit CISC Harvard architecture with 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles. Its low-power design integrates a voltage regulator (REGC), POR/LVD reset management, and snooze mode for dynamic power scaling.

It features a dedicated LCD controller with programmable contrast (16 steps), blinking control, and waveform A/B support; dual serial interfaces (I²C + 2× CSI/SPI); and safety functions including flash CRC, RAM parity check, and illegal memory access detection per IEC/UL 60730.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (12 × 12 mm, 0.65 mm pitch), RoHS-compliant, tray packaging (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAAFA#V0, the R5F10RLCAFA#V0 offers double flash capacity for feature-rich firmware, while the R5F10RJAAFA#V0 trades 12 pins and 9 LCD segments for compactness-both retain identical low-power performance and peripheral IP blocks.

Availability

R5F10RLAAFA#V0 is available at Aetrix Electronics and suitable for smart energy meters, programmable thermostats, and portable medical monitors requiring stable component supply across long production lifecycles.

Supply support for R5F10RLAAFA#V0 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, and power solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line delivers true low-power MCUs optimized for LCD-based consumer and industrial applications, integrating on-chip LCD drivers, ultra-low standby current, and functional safety features.

FAQ

What is the maximum operating frequency and performance of the R5F10RLAAFA#V0?

The R5F10RLAAFA#V0 operates at up to 24 MHz using its on-chip high-speed oscillator, delivering 31 DMIPS of processing performance. Its RL78 16-bit CPU executes 86% of instructions in just 1–2 clock cycles due to its 3-stage pipeline and CISC Harvard architecture, making it suitable for real-time control tasks in LCD-based systems.

Does the R5F10RLAAFA#V0 support external crystals, and what are the clock options?

Yes, the R5F10RLAAFA#V0 supports external crystals on pins P121/P122 (X1/X2) for main system clock (1–20 MHz) and P123/P124 (XT1/XT2) for subsystem clock (32.768 kHz). It also includes an internal high-speed oscillator (24 MHz ±1%) and low-speed oscillator (15 kHz), enabling flexible clock source selection without external components.

How does the LCD controller in the R5F10RLAAFA#V0 reduce BOM cost and design complexity?

The R5F10RLAAFA#V0 integrates a full-featured LCD controller supporting up to 39 segments and 8 commons, with selectable drive methods (capacitor split, internal boost, resistance division), 16-step contrast control, and blink functionality. This eliminates the need for external LCD bias ICs or discrete driver circuitry, reducing component count and PCB area in cost-sensitive consumer applications.

What safety features does the R5F10RLAAFA#V0 include for certified applications?

The R5F10RLAAFA#V0 includes multiple hardware safety features required for IEC/UL 60730 Class B compliance: flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These features enable robust fault detection and recovery in safety-critical embedded systems.

What is the power consumption profile of the R5F10RLAAFA#V0 in different operating modes?

The R5F10RLAAFA#V0 achieves 0.64 µA in Halt mode (RTC + LVD enabled), 0.23 µA in Stop mode (RAM retained), and 62.5 µA/MHz in active operation. Its LCD-specific currents are 0.12 µA (capacitor split) and 0.63 µA (internal boost at VDD = 3.0 V), enabling decade-long battery life in always-on display applications.