Renesas R5F10RFAAFP#X0

Overview

R5F10RFAAFP#X0 from Renesas is an 8 KB flash, 1 KB RAM, 44-pin LQFP RL78/L12 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 and portable medical devices.

For engineers reviewing the R5F10RFAAFP#X0 datasheet, R5F10RFAAFP#X0 pinout, R5F10RFAAFP#X0 application, or R5F10RFAAFP#X0 equivalent, key selection criteria include its 44-pin LQFP package, 1.6–5.5 V supply range, on-chip LCD drive capability, 31 DMIPS at 24 MHz, and IEC 60730 safety features for Class B compliance.

Technical Context

The R5F10RFAAFP#X0 implements the 16-bit RL78 CPU core with Harvard architecture and 3-stage pipeline, delivering 31 DMIPS at 24 MHz. Its low-power design includes multiple sleep modes-Stop (0.23 µA), Halt (0.64 µA), and Snooze-with real-time clock retention and LCD operation down to 0.12 µA using capacitor split method.

It integrates a full-featured LCD controller supporting three drive methods (capacitor split, internal boost, resistance division), 16-step contrast control, blinking, and waveform A/B selection. The peripheral set includes UART, two CSI (SPI-compatible) interfaces, I²C, DMA (2 channels), and safety-critical functions including RAM parity, flash CRC, and illegal memory access detection.

Key Specifications

Pinout & Package

Package: 44-pin plastic LQFP (10 × 10 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 R5F10RFAAFP#X0, R5F10RFCAFP#X0 offers scalable flash capacity within identical mechanical and electrical footprint, while R5F10RGAAFB#X0 trades smaller package pitch for expanded I/O - making the former ideal for incremental upgrades and the latter for resource-constrained new designs.

Availability

R5F10RFAAFP#X0 is available at Aetrix Electronics and suitable for smart metering, portable medical instrumentation, home appliance UIs, and industrial sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for R5F10RFAAFP#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 delivers true low-power performance for LCD-based human interface applications, integrating dedicated display drivers, safety features, and sub-µA sleep modes to minimize system-level power and component count.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F10RFAAFP#X0?

The R5F10RFAAFP#X0 operates at a maximum frequency of 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. This performance level is confirmed in the official Renesas datasheet R01DS0157EJ0223 Rev.2.23 and applies specifically to the R5F10RFAAFP#X0 variant with its 8 KB flash configuration and 44-pin LQFP package.

Does the R5F10RFAAFP#X0 support external crystal oscillators for both main and subsystem clocks?

Yes, the R5F10RFAAFP#X0 supports dual crystal configurations: X1/X2 pins accept a 1–20 MHz crystal for the main system clock, while XT1/XT2 pins support a 32.768 kHz crystal for the subsystem clock and RTC. This dual-crystal capability is explicitly documented for the 44-pin RL78/L12 variants including R5F10RFAAFP#X0 in Section 1.3.2 and Table 1-1 of the datasheet.

How many LCD segments and commons does the R5F10RFAAFP#X0 support, and what drive methods are available?

The R5F10RFAAFP#X0 supports up to 39 segments × 4 commons (or 35 × 8) and provides three configurable LCD drive methods: capacitor split (0.12 µA), internal voltage boost (0.63 µA @ 3.0 V), and external resistance division. These capabilities are specified in the "LCD Controller/Driver" section of the R01DS0157EJ0223 datasheet and apply directly to the 44-pin R5F10RFx series.

What safety certifications or built-in features does the R5F10RFAAFP#X0 include for IEC 60730 compliance?

The R5F10RFAAFP#X0 includes hardware-level safety features required for IEC 60730 Class B compliance: 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. These are listed in the "Safety Features" subsection of the datasheet and are implemented identically across all RL78/L12 44-pin variants including R5F10RFAAFP#X0.

What is the minimum supply voltage and associated operating condition for the R5F10RFAAFP#X0?

The R5F10RFAAFP#X0 operates down to 1.6 V, enabling compatibility with single-cell lithium or two-cell alkaline batteries. This specification is guaranteed across the full industrial temperature range (−40°C to +85°C) and is explicitly stated in the "Ultra-Low Power Technology" section of the R01DS0157EJ0223 datasheet for all R5F10RFx parts.