Renesas R5F10RLCGFB#X0

Overview

R5F10RLCGFB#X0 from Renesas is a 64-pin LFQFP, 32 KB flash, 2 KB data flash, 1.5 KB RAM RL78/L12 microcontroller with integrated LCD controller/driver (up to 39 seg × 4 com), 10-bit ADC (10 channels), RTC, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD). It targets battery-powered LCD display systems such as smart meters and portable medical devices.

For engineers reviewing the R5F10RLCGFB#X0 datasheet, R5F10RLCGFB#X0 pinout, R5F10RLCGFB#X0 application, or R5F10RLCGFB#X0 equivalent, key selection criteria include its 64-pin LFQFP-0.5 mm pitch package, industrial-grade −40°C to +105°C operation, on-chip LCD drive capability with capacitor-split and internal boost methods, and 24 MHz high-speed on-chip oscillator with ±1% accuracy across voltage and temperature.

Technical Context

The R5F10RLCGFB#X0 implements the 16-bit RL78 CPU core delivering 31 DMIPS at 24 MHz, with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 cycles. It integrates a dedicated LCD controller supporting waveform types A/B, 16-step contrast adjustment, and blinking control.

Its power architecture includes multiple low-power modes: Stop (0.23 µA RAM-retained), Halt (0.64 µA with RTC + LVD), and operating current of 62.5 µA/MHz. The device supports background data flash operations and includes safety features compliant with IEC/UL 60730, including CRC calculation, RAM parity check, and illegal memory access detection.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), industrial-grade (G suffix), embossed tape packaging (#X0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAGFB#X0, the R5F10RLCGFB#X0 provides double flash capacity for larger firmware or data logging, while versus R5F10RGCGB#X0 it delivers 20 additional I/O pins and enhanced LCD drive (39×4 vs. 35×8), enabling richer UIs and more sensor/actuator integration in industrial panels.

Availability

R5F10RLCGFB#X0 is available at Aetrix Electronics and suitable for smart energy metering, industrial thermostat control, portable medical monitoring, and appliance UI applications requiring stable component supply and long-term industrial temperature support.

Supply support for R5F10RLCGFB#X0 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 engineered for ultra-low-power LCD-based applications, integrating high-efficiency CPU, on-chip LCD driver, and functional safety features to replace discrete display controllers in metering and human-interface systems.

FAQ

What is the maximum LCD segment count supported by the R5F10RLCGFB#X0?

The R5F10RLCGFB#X0 supports up to 39 segment outputs and 8 common outputs, configurable as either 35 segments × 8 commons or 39 segments × 4 commons. This flexibility allows direct drive of complex segment LCDs used in utility meters and industrial HMIs without external drivers. The R5F10RLCGFB#X0 implements all required bias generation internally via capacitor-split or internal voltage boost methods.

Does the R5F10RLCGFB#X0 include hardware support for functional safety standards?

Yes, the R5F10RLCGFB#X0 includes multiple hardware safety features aligned with IEC/UL 60730 Class B requirements: flash memory CRC calculation, RAM parity error checking, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test. These features enable certified safe operation in industrial and medical applications without requiring external safety monitors.

What are the low-power consumption figures for the R5F10RLCGFB#X0 in different operating modes?

The R5F10RLCGFB#X0 achieves 0.23 µA in Stop mode (RAM retained), 0.64 µA in Halt mode (RTC + LVD active), and 62.5 µA/MHz during active operation. LCD-specific current is 0.12 µA (capacitor-split method) or 0.63 µA (internal boost at VDD = 3.0 V). These values are measured under specified conditions per R01DS0157EJ0223 Rev.2.23 and confirm suitability for decade-long battery operation.

Can the R5F10RLCGFB#X0 operate without an external crystal?

Yes, the R5F10RLCGFB#X0 includes a high-speed on-chip oscillator rated at 24 MHz with ±1% accuracy across 1.8–5.5 V and −20°C to +85°C, eliminating the need for an external crystal in most applications. External crystals (X1/X2 or XT1/XT2) remain optional for higher precision timing or RTC accuracy, but are not required for basic operation or LCD control.

What is the purpose of the REGC pin on the R5F10RLCGFB#X0?

REGC is the decoupling terminal for the internal voltage regulator supplying the LCD and analog circuits. It must be connected to VSS via a 0.47–1 µF capacitor to stabilize the 1.25 V internal reference and ensure reliable LCD contrast, ADC accuracy, and LVD operation. Failure to properly decouple REGC may cause display flicker, ADC drift, or false low-voltage resets in the R5F10RLCGFB#X0.