Renesas R5F10RFAAFP#10

Overview

R5F10RFAAFP#10 from Renesas is an 8 KB flash, 1 KB RAM, 44-pin LQFP RL78/L12 16-bit microcontroller with integrated LCD controller/driver (up to 39 seg × 4 com), 10-bit ADC (10 channels), RTC, and ultra-low-power operation (0.64 µA in Halt mode with RTC + LVD). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RFAAFP#10 datasheet, R5F10RFAAFP#10 pinout, R5F10RFAAFP#10 application, or R5F10RFAAFP#10 equivalent, key selection criteria include its 44-pin LQFP-0.8 mm pitch package, 1.6–5.5 V supply range, on-chip LCD bias generation, and IEC 60730-compliant safety features for Class B appliance control.

Technical Context

The R5F10RFAAFP#10 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It supports dual-clock domains: high-speed on-chip oscillator (24 MHz ±1% over voltage/temperature) and 32.768 kHz subsystem crystal input for RTC.

Its integrated LCD controller supports three drive methods-capacitor split (0.12 µA), internal voltage boost (0.63 µA at VDD = 3.0 V), and resistance division-with programmable contrast (16 steps) and blinking. The device includes two DMA channels, UART, I²C, two CSI/SPI interfaces, and a windowed watchdog timer.

Key Specifications

Pinout & Package

Package: 44-pin plastic LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RFAAFP#10, R5F10RFCAFP#10 offers scalable code density without layout change, while R5F10RGAAFB#10 trades pin count for compactness and peripheral expansion - both retain identical LCD timing, RTC accuracy, and low-power behavior critical for display-centric applications.

Availability

R5F10RFAAFP#10 is available at Aetrix Electronics and suitable for smart metering, programmable thermostats, portable medical monitors, and industrial panel displays requiring stable component supply across multi-year production cycles.

Supply support for R5F10RFAAFP#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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/L12 product line is designed specifically for ultra-low-power LCD-based human interface applications, integrating display drivers, RTC, and safety features into compact packages to minimize BOM and simplify certification.

FAQ

What is the maximum operating frequency and core performance of the R5F10RFAAFP#10?

The R5F10RFAAFP#10 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. Its RL78 16-bit core executes 86% of instructions in 1–2 clock cycles due to its 3-stage pipeline and Harvard architecture, enabling responsive real-time control in LCD-based appliances without external acceleration.

Does the R5F10RFAAFP#10 support standalone LCD operation without external bias circuitry?

Yes, the R5F10RFAAFP#10 integrates a full LCD controller/driver supporting capacitor-split (0.12 µA), internal voltage boost (0.63 µA at VDD = 3.0 V), and resistance division methods. No external charge pump or bias generator is needed - all required drive waveforms, contrast adjustment (16 steps), and blinking are managed internally by the R5F10RFAAFP#10.

What low-power modes are available on the R5F10RFAAFP#10, and what functions remain active in each?

The R5F10RFAAFP#10 offers Stop mode (0.23 µA, RAM retained), Halt mode (0.64 µA, RTC + LVD active), and Snooze mode (selective peripheral wake-up). In Halt, the RTC maintains calendar/time, LVD monitors supply, and RAM contents persist - ideal for infrequently updated displays like utility meters where wake-up occurs only on button press or RTC alarm.

How many ADC channels and what resolution does the R5F10RFAAFP#10 provide?

The R5F10RFAAFP#10 includes a 10-bit successive approximation register (SAR) ADC with 10 input channels, 2.1 µs conversion time, and support for 1.6 V minimum supply. It features an internal 1.45 V reference voltage and accepts inputs from ANI0–ANI1, ANI16–ANI21 - sufficient for thermistor, battery voltage, and ambient light sensing in thermostat and medical applications using the R5F10RFAAFP#10.

Is the R5F10RFAAFP#10 certified for functional safety standards?

Yes, the R5F10RFAAFP#10 includes hardware-level safety features aligned with IEC 60730 Class B requirements: flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test. These enable developers to achieve compliance in household appliance control without adding external safety monitors - a core design goal of the R5F10RFAAFP#10.