Renesas R5F10RB8AFP#30

Overview

R5F10RB8AFP#30 from Renesas is an 8 KB flash, 1 KB RAM, 32-pin LQFP RL78/L12 microcontroller optimized for ultra-low-power LCD-based applications. It integrates an on-chip LCD controller/driver (up to 35 seg × 4 com), 10-bit ADC (10 channels), RTC with calendar/alarm, and operates from 1.6 V to 5.5 V at up to 24 MHz delivering 31 DMIPS - used in battery-powered smart meters and portable medical displays.

For engineers reviewing the R5F10RB8AFP#30 datasheet, R5F10RB8AFP#30 pinout, R5F10RB8AFP#30 application, or R5F10RB8AFP#30 equivalent, key selection criteria include its 0.64 µA RTC+LVD halt mode, 62.5 µA/MHz active power, integrated LCD bias generation (VL1–VL4, CAPL/CAPH), and 32-pin 7 mm × 7 mm LQFP package with 28 usable I/O pins including 8 dedicated LCD segment/com drivers.

Technical Context

The R5F10RB8AFP#30 implements the 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles. Its low-power design includes multiple sleep modes (Stop: 0.23 µA, Halt: 0.64 µA), snooze operation, and a high-speed on-chip oscillator (24 MHz ±1% over voltage/temperature).

It embeds a full-featured LCD controller supporting capacitor split, internal boost, and resistance division methods with 16-step contrast control and blinking; plus dual CSI interfaces (SPI-compatible), UART, I²C, 8-channel timer array, and safety features including RAM parity, flash CRC, and illegal access detection per IEC/UL 60730.

Key Specifications

Pinout & Package

32-pin plastic LQFP (7 mm × 7 mm, 0.8 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 R5F10RB8AFP#30, R5F10RBAAFP#30 offers direct pin-compatible flash expansion, while R5F10RF8AFP#30 trades package compatibility for increased I/O and ADC resources - both retain identical low-power LCD architecture and safety features.

Availability

R5F10RB8AFP#30 is available at Aetrix Electronics and suitable for smart energy meters, portable medical devices, home appliance control panels, and industrial sensor nodes requiring stable component supply across long production lifecycles.

Supply support for R5F10RB8AFP#30 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 LCD controllers, precision analog, and robust safety features into compact packages for battery-operated consumer and industrial displays.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RB8AFP#30?

The R5F10RB8AFP#30 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 - making it ideal for always-on LCD applications where battery longevity is critical. The R5F10RB8AFP#30 achieves this via multiple low-power states and optimized peripheral clock gating.

Does the R5F10RB8AFP#30 support external crystals, and what are the clock options?

Yes, the R5F10RB8AFP#30 supports external crystals on X1/X2 (main system clock) and XT1/XT2 (subsystem clock). It also includes a high-speed on-chip oscillator (24 MHz ±1% over voltage and temperature), pre-configurable for 1–24 MHz. The low-speed on-chip oscillator runs at 15 kHz, and the subsystem clock supports 32.768 kHz crystal operation - giving designers flexibility between accuracy, cost, and power.

How many LCD segments and commons does the R5F10RB8AFP#30 drive, and what bias methods are supported?

The R5F10RB8AFP#30 drives up to 35 segments × 4 commons or 39 segments × 4 commons. It supports three LCD bias methods: capacitor split (0.12 µA typical), internal voltage boost (0.63 µA at VDD = 3.0 V), and external resistance division. VL1–VL4 outputs and CAPL/CAPH pins enable hardware-assisted bias generation - no external components needed for capacitor split or boost configurations. This capability is integral to the R5F10RB8AFP#30's role in LCD-centric designs.

What safety features does the R5F10RB8AFP#30 include for certified applications?

The R5F10RB8AFP#30 includes flash memory CRC calculation, RAM parity error checking, RAM write protection, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - all aligned with IEC/UL 60730 Class B requirements. These features are implemented in hardware and require no software overhead, enabling robust functional safety in appliances and medical devices without compromising the R5F10RB8AFP#30's low-power performance.

Can the R5F10RB8AFP#30 operate from a single 1.6 V supply, and what peripherals remain functional?

Yes, the R5F10RB8AFP#30 operates from 1.6 V to 5.5 V. At 1.6 V, the CPU, 8 KB flash, 1 KB RAM, RTC, 10-bit ADC (with internal 1.45 V reference), and LCD controller (capacitor split method) remain fully functional. The high-speed on-chip oscillator is limited to ≤4 MHz in LV mode, but the 15 kHz watchdog and interval timer continue operating - ensuring the R5F10RB8AFP#30 maintains core functionality even under deep discharge conditions.