Renesas R5F10RLCAFA#50

Overview

R5F10RLCAFA#50 from Renesas is a 64-pin LQFP (12 × 12 mm, 0.65 mm pitch) 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, 1.5 KB RAM, integrated LCD controller/driver supporting up to 35 seg × 8 com, and ultra-low-power operation (0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RLCAFA#50 datasheet, R5F10RLCAFA#50 pinout, R5F10RLCAFA#50 application, or R5F10RLCAFA#50 equivalent, key selection criteria include its 32 KB code flash density, 64-pin LQFP-0.65 mm package, 35-segment × 8-common LCD drive capability, 24 MHz max CPU frequency, and support for 1.6 V to 5.5 V single-supply operation.

Technical Context

The R5F10RLCAFA#50 implements the RL78 16-bit CISC Harvard architecture with 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its on-chip LCD controller supports capacitor split, internal voltage boost, and resistance division methods, with programmable contrast (16 steps) and blinking control.

It integrates dual communication interfaces (1× I²C, 2× CSI/SPI), 10-channel 10-bit ADC with 2.1 µs conversion time and internal 1.45 V reference, real-time clock with calendar/alarm, and safety features including flash CRC, RAM parity check, and illegal memory access detection for IEC/UL 60730 compliance.

Key Specifications

Pinout & Package

Package: 64-pin plastic LQFP (12 × 12 mm, 0.65 mm pitch), JEDEC standard PLQP0064JA-A / PLQP0064JB-A.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAAFA#50, the R5F10RLCAFA#50 provides double flash capacity for complex UI logic and data logging; versus R5F10RJCAFA#50, it adds 12 extra I/O/LCD pins enabling larger displays and more peripheral interfaces without external expanders.

Availability

R5F10RLCAFA#50 is available at Aetrix Electronics and suitable for smart energy metering, programmable HVAC controls, and portable medical instrumentation requiring stable component supply across long production lifecycles.

Supply support for R5F10RLCAFA#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, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line delivers true low-power performance for LCD-based human interface applications, integrating high-efficiency CPU, on-chip LCD driver, and functional safety features in compact packages.

FAQ

What is the maximum operating frequency and core performance of the R5F10RLCAFA#50?

The R5F10RLCAFA#50 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its RL78 16-bit CISC core executes 86% of instructions in just one or two clock cycles, enabling responsive real-time control in LCD-based applications while maintaining ultra-low power consumption.

Does the R5F10RLCAFA#50 support external crystals, and what clock options are available?

Yes, the R5F10RLCAFA#50 supports both external crystals and internal oscillators. It accepts a 32.768 kHz crystal on X1/X2 for RTC accuracy and higher-frequency crystals on XT1/XT2 for subsystem timing. The high-speed on-chip oscillator provides factory-trimmed 24 MHz operation (±1% over voltage and temperature), eliminating the need for external crystals in cost-sensitive designs.

How many LCD segments and commons can the R5F10RLCAFA#50 drive, and what bias methods does it support?

The R5F10RLCAFA#50 supports up to 35 segments × 8 commons or 39 segments × 4 commons, totaling 280 display elements. It implements three LCD bias methods: capacitor split, internal voltage boost (0.63 µA at VDD = 3.0 V), and external resistance division - allowing optimization for power, contrast, and bill-of-materials in diverse display applications.

What safety certifications or built-in features does the R5F10RLCAFA#50 include for industrial use?

The R5F10RLCAFA#50 includes hardware-level safety features aligned with IEC/UL 60730 Class B requirements: flash memory CRC calculation, RAM parity error detection, SFR and RAM write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test. These features reduce software certification effort for safety-critical industrial and medical applications.

What is the pin compatibility status between R5F10RLCAFA#50 and other RL78/L12 variants like R5F10RJCAFA#50?

The R5F10RLCAFA#50 (64-pin LQFP) and R5F10RJCAFA#50 (52-pin LQFP) share identical peripheral functionality and register mapping but differ in physical pin count and layout. They are not pin-compatible due to different package sizes and I/O counts; migration requires PCB redesign. However, firmware is largely portable thanks to consistent RL78/L12 architecture and peripheral IP.