Renesas R5F10RF8AFP#50

Overview

R5F10RF8AFP#50 from Renesas is an 8 KB flash, 2 KB data flash, 1 KB RAM RL78/L12 16-bit microcontroller in 44-pin LQFP (10 × 10 mm, 0.8 mm pitch), featuring integrated LCD controller/driver (up to 39 seg × 4 com), 10-bit ADC (10 channels), RTC with calendar/alarm, 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 R5F10RF8AFP#50 datasheet, R5F10RF8AFP#50 pinout, R5F10RF8AFP#50 application, or R5F10RF8AFP#50 equivalent, key selection criteria include its 44-pin LQFP package with dedicated LCD segment/com drivers, 8 KB code flash with background data flash erase/program, 1.6–5.5 V operation range, and support for capacitor-split and internal-boost LCD bias methods.

Technical Context

The R5F10RF8AFP#50 implements the RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It delivers 31 DMIPS at 24 MHz using the high-speed on-chip oscillator (±1% accuracy over voltage and temperature).

Its integrated LCD controller supports waveform types A/B, 16-step contrast adjustment, and blinking control; analog subsystem includes 10-bit ADC with internal 1.45 V reference and on-chip temperature sensor; safety features cover CRC, RAM parity, SFR write protection, and illegal memory access detection per IEC/UL 60730.

Key Specifications

Pinout & Package

Package: 44-pin plastic LQFP (10 × 10 mm, 0.8 mm pitch), RoHS-compliant, JEDEC standard PLQP0044GC-A footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RF8AFP#50, R5F10RFAAFP#50 offers immediate flash headroom without layout impact, while R5F10RG8AFB#50 trades package compatibility for expanded peripheral count-making the former ideal for scalable designs and the latter for resource-constrained upgrades requiring hardware revision.

Availability

R5F10RF8AFP#50 is available at Aetrix Electronics and suitable for smart energy metering, portable medical displays, industrial HMI panels, and home appliance user interfaces requiring stable component supply across long production lifecycles.

Supply support for R5F10RF8AFP#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 is engineered for ultra-low-power LCD-based applications-integrating display drivers, precision analog, and functional safety features into compact packages for battery-operated consumer and industrial equipment.

FAQ

What is the maximum operating frequency and accuracy of the on-chip oscillator in R5F10RF8AFP#50?

The R5F10RF8AFP#50 features a high-speed on-chip oscillator rated at 24 MHz with ±1% accuracy across the full operating voltage range (1.8 V to 5.5 V) and temperature range (−20°C to +85°C). This eliminates the need for an external crystal in cost-sensitive applications while maintaining timing integrity for UART, RTC, and LCD frame synchronization. The oscillator supports pre-configured frequencies down to 1 MHz for dynamic power scaling.

Does R5F10RF8AFP#50 support true LCD bias generation without external components?

Yes, R5F10RF8AFP#50 integrates a complete LCD bias solution with four dedicated VL outputs (VL1–VL4) and internal capacitor-split or voltage-boost circuitry. When configured for capacitor-split mode, it generates required AC bias waveforms directly-no external charge pump or resistor network is needed. This reduces bill-of-materials cost and PCB area versus discrete LCD driver implementations.

How many LCD segments and commons can R5F10RF8AFP#50 drive, and what multiplexing options are supported?

R5F10RF8AFP#50 supports up to 39 segment outputs and 8 common outputs, enabling configurations such as 35 seg × 8 com or 39 seg × 4 com. It supports three bias methods: capacitor-split (low power), internal voltage boost (higher contrast), and external resistance division (design flexibility). Waveform type A and B are selectable per segment group to optimize flicker and contrast.

What safety certifications and hardware features does R5F10RF8AFP#50 include for IEC/UL 60730 compliance?

R5F10RF8AFP#50 includes hardware-level safety features required for IEC/UL 60730 Class B compliance: flash memory CRC calculation engine, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitor, and ADC self-test capability. These are implemented in silicon-not software libraries-ensuring deterministic behavior during safety-critical runtime checks.

Can R5F10RF8AFP#50 execute code while writing to data flash memory?

Yes, R5F10RF8AFP#50 supports background operation of its 2 KB data flash memory. Code execution continues uninterrupted during data flash erase or programming cycles, enabling real-time data logging, parameter storage, and firmware updates without system freeze. This is achieved via separate flash banks and dedicated command sequencer hardware-no CPU polling or wait states required.