Renesas R5F10RJCAFA#30

Overview

R5F10RJCAFA#30 from Renesas is a 52-pin LQFP-packaged 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, and 1.5 KB RAM, operating from 1.6 V to 5.5 V. It integrates an LCD controller/driver (up to 35 seg × 8 com), 10-channel 10-bit ADC, RTC with calendar/alarm, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD) for battery-powered LCD displays.

For engineers reviewing the R5F10RJCAFA#30 datasheet, R5F10RJCAFA#30 pinout, R5F10RJCAFA#30 application, or R5F10RJCAFA#30 equivalent, key selection criteria include its 52-pin LQFP-0.65 mm pitch package, integrated LCD drive capability with capacitor-split and internal boost methods, 24 MHz high-speed on-chip oscillator (±1% accuracy), and IEC/UL 60730 safety features including flash CRC and RAM parity.

Technical Context

The R5F10RJCAFA#30 implements a Harvard-architecture 16-bit RL78 CPU core delivering 31 DMIPS at 24 MHz, with 86% of instructions executed in 1–2 clock cycles. Its timer array unit provides eight 16-bit channels supporting input capture, output compare, PWM, and interval timing, plus dedicated RTC and watchdog functions.

It supports dual-clock domains: a high-speed main system clock (crystal or on-chip oscillator up to 24 MHz) and a low-speed subsystem clock (32.768 kHz crystal or internal 15 kHz oscillator). The LCD controller supports waveform types A/B, 16-step contrast adjustment, blinking, and three drive methods-capacitor split, internal voltage boost, and resistance division-with VL1–VL4 power rails and CAPH/CAPL pins.

Key Specifications

Pinout & Package

Package: 52-pin plastic LQFP (10 × 10 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 R5F10RJAAFA#30, the R5F10RJCAFA#30 offers double flash capacity for complex UI logic and secure boot code, while R5F10RLCAFA#30 trades compact 52-pin layout for expanded I/O and display capability-making R5F10RJCAFA#30 optimal for mid-complexity LCD applications where board space and BOM count are constrained.

Availability

R5F10RJCAFA#30 is available at Aetrix Electronics and suitable for smart meter displays, home appliance control panels, and portable medical monitors requiring stable component supply, long lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for R5F10RJCAFA#30 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 headquartered in Japan, specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line is designed specifically for ultra-low-power LCD-based applications, integrating high-efficiency CPU, on-chip LCD driver, and safety-certified peripherals to minimize external components in consumer and industrial displays.

FAQ

What is the maximum operating frequency and power efficiency of the R5F10RJCAFA#30?

The R5F10RJCAFA#30 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS performance. Its ultra-low-power architecture achieves 62.5 µA per MHz during active operation and only 0.64 µA in Halt mode with RTC and LVD enabled-critical for battery-powered LCD applications where runtime and standby life are paramount. This efficiency is validated across the full 1.6 V to 5.5 V supply range.

Does the R5F10RJCAFA#30 support external crystal oscillators, and what are the options?

Yes, the R5F10RJCAFA#30 supports both main and subsystem crystal oscillators. It accepts a main system crystal (X1/X2) from 1 to 20 MHz and a 32.768 kHz crystal (XT1/XT2) for the subsystem clock. The on-chip high-speed oscillator (24 MHz ±1%) eliminates the need for external crystals in many applications, but crystal support ensures precise timing for RTC, communication, or regulatory compliance where stability is mandatory.

How does the LCD controller in the R5F10RJCAFA#30 handle different display configurations?

The R5F10RJCAFA#30 LCD controller supports up to 35 segments × 8 commons or 39 segments × 4 commons, with selectable drive methods: capacitor-split, internal voltage boost, or external resistance division. It provides 16-step contrast adjustment, waveform type A/B selection, and hardware blinking-all configurable via registers. The VL1–VL4 outputs and CAPH/CAPL pins enable flexible bias voltage generation without external components.

What safety certifications and features does the R5F10RJCAFA#30 include for industrial use?

The R5F10RJCAFA#30 includes IEC/UL 60730 Class B compliance features: flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test. These are implemented in hardware and documented in Renesas' functional safety manual, enabling certified designs for white goods, industrial controls, and medical devices without requiring external safety monitors.

Can the R5F10RJCAFA#30 perform in-system programming of its flash memory?

Yes, the R5F10RJCAFA#30 supports full in-system programming (ISP) of both code and data flash memory. It includes a flash shield window function to protect critical bootloader sections, and background operation allows data flash writes while executing application code. Self-programming is performed using standard Renesas FINE tools and complies with JEDEC standards for endurance (100K program/erase cycles for code flash, 1M for data flash).