Renesas R5F10RLCAFA#10

Overview

R5F10RLCAFA#10 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 39 seg × 4 com or 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 and portable medical devices.

For engineers reviewing the R5F10RLCAFA#10 datasheet, R5F10RLCAFA#10 pinout, R5F10RLCAFA#10 application, or R5F10RLCAFA#10 equivalent, key selection criteria include its 24 MHz high-speed on-chip oscillator (±1% accuracy), 10-bit ADC with 10 channels, 8-channel timer array, I²C/SPI/UART interfaces, and IEC 60730-compliant safety features for Class B appliance control.

Technical Context

The R5F10RLCAFA#10 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and CISC instruction set delivering 31 DMIPS at 24 MHz. Its power management supports multiple low-power modes including Stop (0.23 µA), Halt (0.64 µA), and Snooze, enabling extended battery life in always-on LCD applications.

Integrated peripherals include a configurable LCD controller supporting capacitor split, internal boost, and resistance division drive methods; dual DMA channels; 12-bit interval timer; real-time clock with calendar/alarm; and hardware CRC engine for flash integrity verification - all optimized for cost-sensitive, safety-aware consumer and industrial displays.

Key Specifications

Pinout & Package

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

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAAFA#10 and R5F10RJCAFA#10, the R5F10RLCAFA#10 provides maximum code density and I/O count in the largest LQFP package - ideal for feature-rich, safety-critical LCD applications where firmware growth headroom and peripheral expansion are prioritized.

Availability

R5F10RLCAFA#10 is available at Aetrix Electronics and suitable for smart energy meters, portable medical devices, home appliance control panels, and industrial HMI modules requiring stable component supply across multi-year production cycles.

Supply support for R5F10RLCAFA#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 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, LCD-optimized MCUs with integrated drivers, safety features, and scalable memory - designed specifically for cost-sensitive, battery-operated consumer and industrial display applications.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RLCAFA#10?

The R5F10RLCAFA#10 operates at up to 24 MHz using its high-speed on-chip oscillator with ±1% accuracy across 1.8–5.5 V and −20°C to 85°C. Active power consumption is 62.5 µA/MHz; in Halt mode with RTC and LVD enabled, it draws just 0.64 µA - critical for long-life battery applications. The R5F10RLCAFA#10 achieves this via RL78's ultra-low-leakage process and dynamic power gating.

Does the R5F10RLCAFA#10 support external crystals, and what are the oscillator options?

Yes, the R5F10RLCAFA#10 supports external crystals on P121/P122 (main system clock, 1–20 MHz) and P123/P124 (subsystem clock, 32.768 kHz). It also integrates a high-speed on-chip oscillator (24 MHz, ±1%), low-speed on-chip oscillator (15 kHz), and programmable PLL. All clock sources are selectable via system registers, and the R5F10RLCAFA#10 includes clock frequency detection for safety monitoring.

How many LCD segments and commons does the R5F10RLCAFA#10 support, and what drive methods are available?

The R5F10RLCAFA#10 supports up to 39 segments and 8 commons (35 seg × 8 com or 39 seg × 4 com configurations). It offers three hardware-selectable LCD drive methods: capacitor split (0.12 µA), internal voltage boost (0.63 µA at 3.0 V), and external resistance division. Contrast is adjustable in 16 steps, and blinking is supported - all managed by dedicated LCD controller logic without CPU intervention.

What safety features does the R5F10RLCAFA#10 include for IEC 60730 compliance?

The R5F10RLCAFA#10 includes flash memory CRC calculation, RAM parity error checking, RAM write protection, SFR write protection, illegal memory access detection, clock frequency detection, and ADC self-test - all required for IEC 60730 Class B appliance control certification. These features are implemented in hardware and can be enabled via configuration registers, ensuring deterministic behavior during safety checks without software dependency.

Can the R5F10RLCAFA#10 operate from a single 1.6 V supply, and what peripherals remain functional at low voltage?

Yes, the R5F10RLCAFA#10 operates from 1.6 V to 5.5 V. At 1.6 V, the CPU, 10-bit ADC (with internal 1.45 V reference), LCD controller (capacitor split method), RTC, and key return (KR) inputs remain fully functional. The high-speed on-chip oscillator is disabled below 1.8 V, but the 15 kHz low-speed oscillator and subsystem clock (32.768 kHz) maintain timing for RTC and low-power wake-up events - ensuring reliable operation across wide battery discharge curves.