Renesas R5F10RG8GFB#10

Overview

R5F10RG8GFB#10 from Renesas is an 8 KB flash, 1.5 KB RAM, 48-pin LFQFP microcontroller in the RL78/L12 family, featuring integrated LCD controller/driver (up to 35 seg × 8 com), 10-bit ADC (10 channels), real-time clock with calendar, and ultra-low-power operation (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 R5F10RG8GFB#10 datasheet, R5F10RG8GFB#10 pinout, R5F10RG8GFB#10 application, or R5F10RG8GFB#10 equivalent, key selection criteria include its industrial-grade temperature range (−40°C to +105°C), on-chip LCD drive capability without external bias, 24 MHz high-speed on-chip oscillator (±1% accuracy), and support for capacitor-split and internal-boost LCD driving methods.

Technical Context

The R5F10RG8GFB#10 implements the 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its instruction set includes single-cycle 16×16 multiply and MAC operations, plus 16-bit barrel shifter for efficient bit manipulation.

It integrates a dedicated LCD controller supporting waveform types A/B, 16-step contrast adjustment, blinking control, and three driving methods - capacitor split, internal voltage boost (0.63 µA at VDD = 3.0 V), and resistance division - all configurable via register settings without external components.

Key Specifications

Pinout & Package

48-pin LFQFP (7 mm × 7 mm, 0.5 mm pitch), industrial-grade (−40°C to +105°C), with exposed pad not present (non-HWQFN).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RG8GFB#10, R5F10RGA GFB#10 offers immediate flash headroom without layout change, while RL78/G13 sacrifices LCD integration for scalability - making R5F10RG8GFB#10 optimal for cost-sensitive, LCD-centric industrial designs.

Availability

R5F10RG8GFB#10 is available at Aetrix Electronics and suitable for smart energy meters, industrial thermostats, and portable medical monitors requiring stable component supply across extended product lifecycles.

Supply support for R5F10RG8GFB#10 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, and power solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line is engineered specifically for ultra-low-power LCD-based applications - integrating display control, precision timing, and robust peripheral sets into compact packages for battery-operated instrumentation.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RG8GFB#10?

The R5F10RG8GFB#10 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. In active mode, it consumes 62.5 µA per MHz; in halt mode with RTC and LVD enabled, it draws just 0.64 µA - enabling multi-year battery life in always-on LCD applications. The R5F10RG8GFB#10 achieves this via RL78's ultra-low-leakage process and dynamic voltage scaling.

Does the R5F10RG8GFB#10 support external crystals for the main system clock?

Yes, the R5F10RG8GFB#10 supports external crystals on pins P121 (X1) and P122 (X2) for the main system clock, operating from 1 MHz to 20 MHz. It also accepts external clock input on P122 (EXCLK) up to 24 MHz. The device includes built-in load capacitance and startup time configuration, eliminating need for external capacitors in many cases. This flexibility allows the R5F10RG8GFB#10 to meet timing-critical requirements where on-chip oscillator tolerance is insufficient.

How does the LCD controller in the R5F10RG8GFB#10 reduce external component count?

The R5F10RG8GFB#10 integrates a full LCD controller/driver supporting up to 35 segments × 8 commons, with selectable capacitor-split, internal-voltage-boost, or resistance-division driving methods. It provides dedicated VL1–VL4 power outputs, CAPL/CAPH terminals, and COM/SEG drivers - eliminating external LCD bias generators, charge pumps, or resistor networks. This integration reduces BOM cost and PCB area by ≥30% compared to discrete LCD solutions, a key advantage of the R5F10RG8GFB#10 in space-constrained designs.

What safety features does the R5F10RG8GFB#10 include for certified industrial applications?

The R5F10RG8GFB#10 includes hardware-level safety features aligned with IEC/UL 60730: flash memory CRC calculation engine, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These features enable runtime diagnostics and fault detection without software overhead. For Class B compliance, the R5F10RG8GFB#10 provides documented failure modes and mitigation paths - critical for thermostats, smart meters, and other safety-relevant systems.

Can the R5F10RG8GFB#10 operate from a single 3.0 V coin cell battery?

Yes, the R5F10RG8GFB#10 operates across 1.6 V to 5.5 V, making it compatible with standard 3.0 V CR2032 coin cells. Its 0.64 µA halt-mode current (RTC + LVD) and 0.12 µA LCD current (capacitor-split method) allow >5-year operation on a single CR2032 in typical smart-meter or thermostat use cases. The R5F10RG8GFB#10 maintains full functionality - including ADC, timers, and LCD drive - down to 1.6 V, ensuring graceful degradation as battery voltage declines.