Renesas R5F10RLAAFA#50

Overview

R5F10RLAAFA#50 from Renesas is a 16-bit RL78/L12 microcontroller with integrated LCD controller/driver, 16 KB flash memory, 2 KB data flash, and 1 KB RAM, operating from 1.6 V to 5.5 V. It delivers 31 DMIPS at 24 MHz, achieves ultra-low power consumption (62.5 µA/MHz active, 0.64 µA in RTC+LVD halt mode), and supports up to 35-segment × 8-common LCD drive for battery-powered consumer instrumentation.

For engineers reviewing the R5F10RLAAFA#50 datasheet, R5F10RLAAFA#50 pinout, R5F10RLAAFA#50 application, or R5F10RLAAFA#50 equivalent, key selection criteria include its LQFP-64 (12×12 mm, 0.65 mm pitch) package, on-chip high-speed oscillator (±1% accuracy), 10-bit ADC with internal reference, and IEC/UL 60730 safety features for certified embedded control.

Technical Context

The R5F10RLAAFA#50 implements a Harvard-architecture 16-bit RL78 CPU core with 3-stage pipeline, executing 86% of instructions in 1–2 clock cycles. It integrates a dedicated LCD controller supporting capacitor-split, internal-boost, and resistance-division drive methods, plus real-time clock with full calendar and alarm functions.

Its peripheral set includes two CSI interfaces (SPI-compatible), one UART, one I²C, eight 16-bit timer channels, DMA controller with two channels, and safety-critical features including flash CRC, RAM parity check, SFR write protection, and illegal memory access detection - all designed for robust operation in consumer-grade ambient conditions (−40°C to +85°C).

Key Specifications

Pinout & Package

Package: 64-pin plastic LQFP (12 × 12 mm, 0.65 mm pitch), RoHS-compliant, consumer-grade (−40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAAFA#50, R5F10RLCAFA#50 offers double flash capacity without layout change, while R5F10RJAAFA#50 trades 12 pins and 4 LCD segments for 25% smaller package - enabling cost-optimized variants within the same RL78/L12 family.

Availability

R5F10RLAAFA#50 is available at Aetrix Electronics and suitable for smart energy meters, home appliance control panels, portable medical devices, and industrial panel meters requiring stable component supply across multi-year production cycles.

Supply support for R5F10RLAAFA#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 is a global semiconductor leader specializing in microcontrollers, analog, and power management solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line targets ultra-low-power LCD-based consumer applications, integrating high-efficiency processing, comprehensive display control, and functional safety features in compact packages.

FAQ

What is the maximum operating frequency and associated power consumption of the R5F10RLAAFA#50?

The R5F10RLAAFA#50 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. At this frequency, active current consumption is 62.5 µA/MHz - meaning ~1.5 mA typical at 24 MHz with peripherals enabled. The device also supports lower-frequency modes (e.g., 1 MHz) to further reduce dynamic power in burst-processing applications.

Does the R5F10RLAAFA#50 support hardware-based safety certification for household appliances?

Yes, the R5F10RLAAFA#50 includes multiple IEC/UL 60730 Class B compliance features: flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - all documented in Renesas' functional safety manual R01US0092EJ0200.

How many LCD segments and commons can the R5F10RLAAFA#50 drive, and what drive methods are supported?

The R5F10RLAAFA#50 supports up to 35 segments × 8 commons or 39 segments × 4 commons. It implements three LCD drive methods: capacitor-split (lowest power), internal voltage boost (enables operation at 1.6 V), and external resistance division - selectable via register configuration without external component changes.

What debug interface does the R5F10RLAAFA#50 provide, and is external hardware required?

The R5F10RLAAFA#50 features a single-wire on-chip debug (SWD) interface accessible via TOOL0 (P40) and RESET pins. No external debugger chip is needed - standard Renesas E2 emulator or compatible SWD probes support full flash programming, breakpoint setting, and real-time variable monitoring without dedicated debug headers.

Is the R5F10RLAAFA#50 pin-compatible with other RL78/L12 variants in the 64-pin LQFP package?

Yes, all RL78/L12 64-pin LQFP variants - including R5F10RLAAFA#50 (16 KB flash), R5F10RLCAFA#50 (32 KB flash), and R5F10RLAGFA#50 (industrial temp grade) - share identical pinouts, electrical characteristics, and peripheral mapping, enabling seamless capacity or temperature grade upgrades without PCB redesign.