Renesas R5F10RLCGFB#V0

Overview

R5F10RLCGFB#V0 from Renesas is a 64-pin LFQFP (10 × 10 mm, 0.5 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 R5F10RLCGFB#V0 datasheet, R5F10RLCGFB#V0 pinout, R5F10RLCGFB#V0 application, or R5F10RLCGFB#V0 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 industrial-grade −40°C to +105°C operation.

Technical Context

The R5F10RLCGFB#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 includes multiple sleep modes (Stop, Halt, Snooze), voltage regulator with REGC capacitor support, and dual-clock domains (main system clock up to 24 MHz and subsystem clock at 32.768 kHz).

It integrates an LCD controller supporting capacitor split, internal voltage boost, and resistance division drive methods with 16-step contrast control and blinking function. The peripheral set includes DMA (2 channels), watchdog timer with window function, real-time clock with calendar/alarm, and safety features compliant with IEC/UL 60730 including flash CRC, RAM parity check, and illegal memory access detection.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, industrial temperature grade (−40°C to +105°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RLAGFB#V0, the R5F10RLCGFB#V0 provides double flash capacity for complex UI or field-upgradable firmware; versus R5F10RJCGFA#V0, it delivers 9 additional LCD segments, dual power domains for cleaner analog performance, and enhanced EMI robustness via EVDD/EVSS isolation.

Availability

R5F10RLCGFB#V0 is available at Aetrix Electronics and suitable for smart energy metering, portable medical instrumentation, and industrial HMI applications requiring stable component supply, long lifecycle assurance, and industrial temperature compliance.

Supply support for R5F10RLCGFB#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 Corporation 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 controller/driver, and functional safety features to reduce system complexity and bill-of-materials cost.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in the R5F10RLCGFB#V0?

The R5F10RLCGFB#V0 features a high-speed on-chip oscillator rated at 24 MHz with ±1% accuracy across the full industrial temperature range (−40°C to +105°C) and supply voltage (1.8 V to 5.5 V). This eliminates the need for an external crystal in many applications while maintaining timing integrity for UART, I²C, and real-time functions. The R5F10RLCGFB#V0 also supports external crystal oscillation (X1/X2) and subsystem clock (XT1/XT2) for precision RTC operation.

Does the R5F10RLCGFB#V0 support LCD drive methods other than internal voltage boost?

Yes, the R5F10RLCGFB#V0 supports three LCD drive methods: internal voltage boost, capacitor split, and external resistance division. This flexibility allows optimization for different LCD types, power budgets, and contrast requirements. The capacitor split method achieves ultra-low 0.12 µA LCD operating current, while the internal voltage boost method delivers 0.63 µA at VDD = 3.0 V. All methods are selectable via register configuration, and the R5F10RLCGFB#V0 includes dedicated VL1–VL4 outputs and CAPL/CAPH terminals.

How does the R5F10RLCGFB#V0 ensure functional safety compliance for industrial applications?

The R5F10RLCGFB#V0 incorporates multiple hardware-level safety mechanisms required for IEC/UL 60730 Class B compliance, including flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test. These features enable runtime diagnostics and fault detection without software overhead. The R5F10RLCGFB#V0's dual power domains (VDD/EVDD and VSS/EVSS) further enhance system robustness by isolating analog and digital noise sources in safety-critical environments.

What are the key differences between the R5F10RLCGFB#V0 and the R5F10RJCGFA#V0?

The R5F10RLCGFB#V0 uses a 64-pin LFQFP (0.5 mm pitch) package with EVDD/EVSS separation, supports up to 39 LCD segments, and offers dual power domain noise isolation. The R5F10RJCGFA#V0 is a 52-pin LQFP (0.65 mm pitch) variant with no EVDD/EVSS, limited to 30 LCD segments, and lower pin count. Both share 32 KB flash and 2 KB data flash, but the R5F10RLCGFB#V0 provides greater I/O, enhanced EMI performance, and higher LCD resolution-making it suitable for more demanding industrial HMIs where the R5F10RJCGFA#V0 serves compact, cost-optimized designs.

Can the R5F10RLCGFB#V0 operate from a single 1.8 V supply, and what peripherals remain functional?

Yes, the R5F10RLCGFB#V0 operates from 1.6 V to 5.5 V. At 1.8 V, the high-speed on-chip oscillator runs up to 16 MHz, the 10-bit ADC remains fully functional (including internal 1.45 V reference), and the LCD controller supports all three drive methods. The real-time clock, 8-channel timer array, and I²C/SPI/UART interfaces retain full operation. However, maximum CPU performance is reduced to 16 MHz (20.5 DMIPS), and certain high-drive GPIO features may be limited per electrical specifications in the R5F10RLCGFB#V0 datasheet.