Renesas R5F10RJCAFA#V0

Overview

R5F10RJCAFA#V0 from Renesas is a 52-pin LQFP-packaged 16-bit RL78/L12 microcontroller with 32 KB flash, 2 KB data flash, 1.5 KB RAM, integrated LCD controller/driver (up to 35 seg × 8 com), and ultra-low-power operation (62.5 µA/MHz active, 0.64 µA in RTC+LVD halt mode). It targets battery-powered LCD display applications such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RJCAFA#V0 datasheet, R5F10RJCAFA#V0 pinout, R5F10RJCAFA#V0 application, or R5F10RJCAFA#V0 equivalent, key selection criteria include its 24 MHz high-speed on-chip oscillator (±1% accuracy), 10-bit ADC with 1.6 V support, 8-channel timer array, I²C/SPI/UART interfaces, and IEC 60730-compliant safety features for Class B appliance control.

Technical Context

The R5F10RJCAFA#V0 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and CISC instruction set delivering 31 DMIPS at 24 MHz. Its low-power design integrates multiple clock domains: high-speed on-chip oscillator (24 MHz), subsystem crystal oscillator (32.768 kHz), and low-speed internal oscillator (15 kHz).

It embeds an LCD controller supporting capacitor split, internal voltage boost, and resistance division methods with 16-step contrast adjustment and blinking control. The peripheral set includes two DMA channels, 10-channel 10-bit ADC with internal 1.45 V reference, and hardware CRC for flash memory integrity verification.

Key Specifications

Pinout & Package

Package: 52-pin plastic LQFP (10 × 10 mm, 0.65 mm pitch), RoHS-compliant, operating ambient temperature −40°C to +85°C (Consumer grade A).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RJCAFA#V0, the R5F10RJAAFA#V0 reduces flash by 50% without altering power profile or LCD capability, while the R5F10RLCAFA#V0 expands I/O and segment count in a larger package-neither is pin-compatible, but both share identical peripheral register mapping and toolchain support.

Availability

R5F10RJCAFA#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 R5F10RJCAFA#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, 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 power management, on-chip LCD driving, and functional safety features for consumer and industrial appliances.

FAQ

What is the maximum operating frequency and performance of the R5F10RJCAFA#V0?

The R5F10RJCAFA#V0 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS of processing performance. Its RL78 CPU core executes 86% of instructions in just one or two clock cycles, enabling responsive real-time control in LCD-based systems without external clock components.

Does the R5F10RJCAFA#V0 support LCD displays with more than 4 common lines?

Yes, the R5F10RJCAFA#V0 supports up to 8 common lines (COM0–COM7) and 37 segment outputs (SEG0–SEG36), enabling configurations such as 35 seg × 8 com or 39 seg × 4 com. This flexibility accommodates both high-segment-count numeric displays and alphanumeric panels commonly used in industrial HMIs.

How does the R5F10RJCAFA#V0 achieve ultra-low power consumption in standby mode?

The R5F10RJCAFA#V0 achieves 0.64 µA current draw in Halt mode with only RTC and LVD active by disabling the CPU, flash, and most peripherals while retaining RAM and real-time clock functionality. Its optimized voltage regulator and low-leakage process technology enable decade-long battery operation in metering and portable applications.

What safety certifications or features does the R5F10RJCAFA#V0 include for appliance control?

The R5F10RJCAFA#V0 includes hardware-level safety features aligned with IEC 60730 Class B requirements: flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, and clock frequency monitoring-enabling certified compliance without software-only workarounds.

Can the R5F10RJCAFA#V0 operate from a single 1.8 V supply?

Yes, the R5F10RJCAFA#V0 supports operation from 1.6 V to 5.5 V, including 1.8 V. At this voltage, its 24 MHz on-chip oscillator maintains ±1% accuracy across −20°C to +85°C, and the 10-bit ADC remains functional with 1.6 V minimum supply-making it suitable for coin-cell or energy-harvesting systems.