Renesas R5F10RBAAFP#X0

Overview

R5F10RBAAFP#X0 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, thermostats, and portable medical devices.

For engineers reviewing the R5F10RBAAFP#X0 datasheet, R5F10RBAAFP#X0 pinout, R5F10RBAAFP#X0 application, or R5F10RBAAFP#X0 equivalent, key selection criteria include its 32-pin LQFP package, 8 KB code flash with data flash, LCD segment/com support (35 seg × 4 com), 1.6–5.5 V operation, and verified low-power modes for extended battery life in consumer-grade (-40°C to +85°C) designs.

Technical Context

The R5F10RBAAFP#X0 implements a 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, enabling 86% of instructions in 1–2 clock cycles. Its on-chip voltage regulator supports single-supply operation, and the peripheral I/O redirection register (PIOR) enables flexible pin function assignment without hardware changes.

It integrates a dedicated LCD controller supporting capacitor split, internal voltage boost, and resistance division methods - configurable for up to 35 segments × 4 commons or 39 segments × 4 commons. The real-time clock includes full calendar, alarm, and watch correction functions, operating independently in Halt mode with only 0.64 µA consumption.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, tape-and-reel (#X0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RFAAFP#X0 and R5F10RGAAFB#X0, the R5F10RBAAFP#X0 offers optimal cost and size for entry-level LCD applications with fixed I/O and memory needs - avoiding over-provisioning while maintaining full feature compatibility (LCD, RTC, ADC, low-power modes) in the smallest 32-pin LQFP form factor.

Availability

R5F10RBAAFP#X0 is available at Aetrix Electronics and suitable for smart meter displays, programmable thermostats, and portable medical devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R5F10RBAAFP#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 designed specifically for ultra-low-power LCD-based applications - integrating high-efficiency peripherals, robust safety features, and scalable memory options to minimize system-level BOM and power consumption.

FAQ

What is the maximum operating frequency and performance of the R5F10RBAAFP#X0?

The R5F10RBAAFP#X0 operates at up to 24 MHz using its high-speed on-chip oscillator with ±1% accuracy across 1.8–5.5 V and −20°C to +85°C. It delivers 31 DMIPS at this frequency, enabled by a 16-bit RL78 core with 3-stage pipeline and 86% of instructions executing in 1–2 clock cycles. This performance is sufficient for real-time LCD updates, sensor processing, and communication protocol handling in battery-powered devices.

Does the R5F10RBAAFP#X0 support LCD bias voltage generation internally?

Yes, the R5F10RBAAFP#X0 supports internal LCD voltage boosting, capacitor split, and external resistance division methods. Its VL1–VL4 pins provide programmable bias voltages, and the LCD controller includes 16-step contrast adjustment. When using the internal voltage boost method at VDD = 3.0 V, LCD operating current is 0.63 µA - critical for extending battery life in always-on displays.

What low-power modes are available on the R5F10RBAAFP#X0, and what functions remain active in each?

The R5F10RBAAFP#X0 offers Stop mode (0.23 µA, RAM retained), Halt mode (0.64 µA, RTC + LVD active), and Snooze mode. In Halt mode, the real-time clock maintains calendar/timekeeping, low-voltage detection remains functional, and wake-up can occur via external interrupt or RTC alarm - all while the CPU and most peripherals are powered down. This enables multi-year operation on coin-cell batteries.

Can the R5F10RBAAFP#X0 be programmed in-system, and what debug interface does it use?

Yes, the R5F10RBAAFP#X0 supports in-system programming and debugging via a 1-wire on-chip debug interface using the TOOL0 pin (P40). No external debugger hardware is required for basic programming and real-time trace - reducing development cost and board space. Flash self-programming is supported with flash shield window protection to prevent accidental writes.

What safety certifications or built-in features does the R5F10RBAAFP#X0 support for industrial applications?

The R5F10RBAAFP#X0 includes hardware-level safety features aligned with IEC/UL 60730 requirements: flash memory CRC calculation, RAM parity error detection, RAM and SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test. These features enable certified Class B appliance control without external safety monitors - reducing certification effort and bill-of-materials cost.