Renesas R5F10RBAAFP#50

Overview

R5F10RBAAFP#50 from Renesas is an 8 KB flash, 1 KB RAM, 32-pin LQFP (7×7 mm, 0.8 mm pitch) 16-bit RL78/L12 microcontroller optimized for ultra-low-power LCD applications. It integrates an on-chip LCD controller/driver (up to 35 seg × 8 com), operates from 1.6 V to 5.5 V, delivers 31 DMIPS at 24 MHz, and achieves 0.64 µA RTC+LVD halt current - enabling battery-powered smart meters and portable medical displays.

For engineers reviewing the R5F10RBAAFP#50 datasheet, R5F10RBAAFP#50 pinout, R5F10RBAAFP#50 application, or R5F10RBAAFP#50 equivalent, key selection criteria include its integrated LCD drive capability, 10-bit ADC with internal 1.45 V reference, dual SPI/I²C/UART interfaces, and IEC 60730-compliant safety features for Class B appliance control.

Technical Context

The R5F10RBAAFP#50 implements a Harvard-architecture 16-bit RL78 CPU core with 3-stage pipeline, executing 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 mode support, and dedicated LCD power rails (VL1–VL4) with capacitor-split or internal-boost driving methods.

It embeds a full-featured peripheral set including 8-channel 16-bit timer array, real-time clock with calendar/alarm, 2-channel DMA, 10-channel 10-bit ADC (2.1 µs conversion), and hardware CRC engine - all operating within the same 1.6–5.5 V supply range as the core logic.

Key Specifications

Pinout & Package

Package: 32-pin plastic LQFP (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RBAAFP#50, R5F10RFAAFP#50 provides greater memory and I/O for complex UIs, while R5F10RGAAFB#50 offers finer pitch packaging and expanded keypad support - both retain identical low-power profiles and LCD architecture but require PCB redesign due to different pin counts and packages.

Availability

R5F10RBAAFP#50 is available at Aetrix Electronics and suitable for smart metering, portable medical devices, and home appliance control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F10RBAAFP#50 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 targets ultra-low-power LCD-based applications - designed specifically for battery-operated meters, medical handhelds, and appliances where integration, energy efficiency, and functional safety are critical.

FAQ

What is the maximum operating frequency and power consumption of the R5F10RBAAFP#50?

The R5F10RBAAFP#50 operates at up to 24 MHz using its high-speed on-chip oscillator (±1% accuracy), delivering 31 DMIPS. At this frequency, it consumes 62.5 µA/MHz - resulting in ~1.5 mA active current. In Halt mode with RTC and LVD enabled, it draws only 0.64 µA, making it ideal for always-on LCD applications powered by coin cells or small batteries.

Does the R5F10RBAAFP#50 support external crystals, and what are the clock options?

Yes, the R5F10RBAAFP#50 supports multiple clock sources: external main system clock (EXCLK) or crystal (X1/X2) up to 20 MHz, external subsystem clock (EXCLKS/XT1/XT2) at 32.768 kHz, and an internal high-speed oscillator configurable from 1 to 24 MHz. The on-chip oscillator eliminates crystal cost in many applications, while crystal support ensures precision timing for RTC or communication protocols.

How many LCD segments and commons can the R5F10RBAAFP#50 drive, and what drive methods are supported?

The R5F10RBAAFP#50 supports up to 35 segments × 8 commons (or 39 × 4) via its integrated LCD controller/driver. It supports three drive methods: capacitor-split (0.12 µA LCD current), internal voltage boost (0.63 µA at VDD = 3.0 V), and external resistor-division - allowing optimization for power, contrast, or bill-of-materials reduction depending on display type and battery constraints.

What safety certifications or built-in features does the R5F10RBAAFP#50 provide for appliance applications?

The R5F10RBAAFP#50 includes hardware-level safety features required for IEC 60730 Class B compliance: flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These features enable robust self-diagnostics without software overhead - critical for thermostats, ovens, and other household appliances requiring functional safety certification.

Can the R5F10RBAAFP#50 operate from a single 1.8 V supply, and what peripherals remain functional?

Yes, the R5F10RBAAFP#50 operates across 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), LCD driving (capacitor-split method) works, and all I/Os maintain 5 V tolerance. However, the maximum system clock is reduced from 24 MHz to 16 MHz, and some peripheral clocks may scale accordingly - verified in the electrical characteristics table of the R01DS0157EJ0223 datasheet.