Renesas R5F10RJCAFA#50

Overview

R5F10RJCAFA#50 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, featuring an integrated LCD controller/driver (up to 35 seg × 8 com), 10-bit ADC (10 channels), RTC with calendar/alarm, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD) for battery-powered LCD display systems.

For engineers reviewing the R5F10RJCAFA#50 datasheet, R5F10RJCAFA#50 pinout, R5F10RJCAFA#50 application, or R5F10RJCAFA#50 equivalent, key selection criteria include LCD segment/com drive capability, low-voltage operation (1.6 V–5.5 V), on-chip debug support, and IEC/UL 60730 safety features for certified consumer and industrial metering designs.

Technical Context

The R5F10RJCAFA#50 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It supports multiple clock sources: high-speed on-chip oscillator (24 MHz ±1%), external crystal (X1/X2), and subsystem clock (XT1/XT2 at 32.768 kHz).

Its peripheral set includes two CSI interfaces (SPI-compatible), one UART, one I²C, eight 16-bit timer channels, DMA (2 channels), and dedicated LCD voltage regulation (VL1–VL4, CAPL/CAPH). Safety functions include RAM parity check, flash CRC, SFR write protection, and illegal memory access detection.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (10 mm × 10 mm, 0.65 mm pitch), RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RJAAFA#50, the R5F10RJCAFA#50 provides double flash capacity for complex UI logic and firmware updates, while R5F10RLCAFA#50 trades compact 52-pin form factor for greater I/O scalability-making the R5F10RJCAFA#50 optimal for mid-complexity LCD applications where size and memory are balanced.

Availability

R5F10RJCAFA#50 is available at Aetrix Electronics and suitable for smart thermostat displays, portable medical devices, and energy meter front panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10RJCAFA#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/L12 product line targets ultra-low-power LCD-based applications such as home appliances, meters, and portable instrumentation, integrating display control, sensing, and safety in a single chip.

FAQ

What is the maximum LCD segment count supported by the R5F10RJCAFA#50?

The R5F10RJCAFA#50 supports up to 35 segments × 8 commons or 39 segments × 4 commons, using its integrated LCD controller/driver with configurable voltage methods (capacitor split, internal boost, or resistor division). This configuration is confirmed in the RL78/L12 datasheet Section 1.6 and matches the 52-pin variant's pin mapping for SEG0–SEG36 and COM0–COM7.

Does the R5F10RJCAFA#50 include hardware safety features required for IEC 60730 certification?

Yes, the R5F10RJCAFA#50 includes flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, and clock frequency monitoring - all documented in the RL78/L12 datasheet as compliant with IEC/UL 60730 Class B requirements for self-test and fault detection in household appliances.

What are the operating voltage and temperature ranges for the R5F10RJCAFA#50?

The R5F10RJCAFA#50 operates from 1.6 V to 5.5 V and is rated for −40°C to +85°C ambient temperature (Consumer grade 'A' variant). These specifications are defined in the RL78/L12 datasheet Section 1.1 and confirmed in the part number decoding table where 'A' denotes the consumer temperature range.

Can the R5F10RJCAFA#50 run without an external crystal?

Yes, the R5F10RJCAFA#50 can operate using its high-speed on-chip oscillator (24 MHz ±1%) for main system clock and low-speed on-chip oscillator (15 kHz) or external 32.768 kHz crystal (XT1/XT2) for RTC - eliminating the need for external crystals in many LCD applications while maintaining timing accuracy.

How much data flash memory does the R5F10RJCAFA#50 provide, and what is its endurance?

The R5F10RJCAFA#50 includes 2 KB of data flash memory with 1 million erase/program cycles (typical), supporting background operation and voltage range of 1.8 V to 5.5 V - enabling reliable storage of calibration data, usage logs, or firmware parameters without external EEPROM.