Renesas R5F10RB8AFP#V0

Overview

R5F10RB8AFP#V0 from Renesas is an 8 KB flash, 1 KB RAM, 32-pin LQFP (7 × 7 mm, 0.8 mm pitch) RL78/L12 microcontroller with integrated LCD controller/driver, 10-bit ADC (10 channels), RTC, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD). It delivers 31 DMIPS at 24 MHz and targets battery-powered LCD display applications such as smart meters and portable medical devices.

For engineers reviewing the R5F10RB8AFP#V0 datasheet, R5F10RB8AFP#V0 pinout, R5F10RB8AFP#V0 application, or R5F10RB8AFP#V0 equivalent, this page provides verified technical context, validated pin functions, confirmed low-power operating modes, and real-world LCD interface implementation details for rapid integration into consumer-grade embedded systems.

Technical Context

The R5F10RB8AFP#V0 implements the 16-bit RL78 CPU core with Harvard architecture, 3-stage pipeline, and CISC instruction set-enabling 86% of instructions to execute in 1–2 clock cycles. Its on-chip voltage regulator supports 1.6 V to 5.5 V operation, and the high-speed on-chip oscillator achieves ±1% accuracy across −20°C to +85°C at 24 MHz.

It integrates a full-featured LCD controller supporting up to 35 seg × 4 com or 39 seg × 4 com configurations via capacitor split, internal boost, or resistance division methods. The device includes two DMA channels, UART, I²C, simplified SPI (CSI), and a 12-bit interval timer-all optimized for deterministic real-time control in resource-constrained LCD applications.

Key Specifications

Pinout & Package

32-pin plastic LQFP (7 × 7 mm, 0.8 mm pitch), 0.8 mm lead pitch, standard JEDEC outline PLQP0032GB-A. REGC requires 0.47–1 µF capacitor to VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RB8AFP#V0, R5F10RBAFP#V0 offers double flash capacity without changing footprint or power behavior, while R5F10RF8AFP#V0 expands I/O and LCD capability at the cost of larger package and layout revision.

Availability

R5F10RB8AFP#V0 is available at Aetrix Electronics and suitable for smart energy meters, portable medical devices, home appliance control panels, and industrial HMI modules requiring stable component supply and long-term lifecycle support.

Supply support for R5F10RB8AFP#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 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 for ultra-low-power LCD-based applications-integrating display driving, sensing, and control in a single chip to minimize system-level BOM and power consumption.

FAQ

What is the maximum operating frequency and associated power consumption of the R5F10RB8AFP#V0?

The R5F10RB8AFP#V0 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS with 62.5 µA/MHz active current. At 24 MHz, typical active current is 1.5 mA (62.5 µA × 24), enabling responsive real-time control while maintaining ultra-low-power efficiency.

Does the R5F10RB8AFP#V0 support external crystal oscillators, and what are the options?

Yes, the R5F10RB8AFP#V0 supports external crystals on X1/X2 pins for main system clock (up to 20 MHz) and XT1/XT2 pins for subsystem clock (32.768 kHz). It also supports external clock input via EXCLK and EXCLKS pins, allowing flexible clock source selection for timing-critical or low-jitter applications.

How many LCD segments and commons does the R5F10RB8AFP#V0 support, and what drive methods are available?

The R5F10RB8AFP#V0 supports up to 35 segments × 4 commons or 39 segments × 4 commons. It implements capacitor-split, internal voltage-boost, and external resistance-division LCD drive methods-enabling optimization for power, contrast, or external component count based on display requirements.

What safety features does the R5F10RB8AFP#V0 include for IEC 60730 compliance?

The R5F10RB8AFP#V0 includes flash memory CRC calculation, RAM parity error check, RAM write protection, SFR write protection, illegal memory access detection, clock frequency detection, and ADC self-test-collectively satisfying IEC/UL 60730 Class B functional safety requirements for household appliances and industrial controls.

Is the R5F10RB8AFP#V0 pin-compatible with other RL78/L12 variants in the same package?

Yes, all 32-pin RL78/L12 variants-including R5F10RB8AFP#V0, R5F10RBAFP#V0, and R5F10RBCAFP#V0-share identical pinouts and package dimensions (PLQP0032GB-A). Firmware and hardware designs are interchangeable within the same memory configuration group.