Renesas R5F10RB8AFP#10

Overview

R5F10RB8AFP#10 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 (up to 35 seg × 4 com), 10-bit ADC (10 channels), real-time clock, and ultra-low-power operation (0.64 µA in RTC+LVD mode). It targets battery-powered LCD display systems such as smart meters, thermostats, and portable medical devices.

For engineers reviewing the R5F10RB8AFP#10 datasheet, R5F10RB8AFP#10 pinout, R5F10RB8AFP#10 application, or R5F10RB8AFP#10 equivalent, key selection criteria include its 8 KB code flash + 2 KB data flash architecture, 1.6–5.5 V single-supply operation, 31 DMIPS at 24 MHz, and dedicated LCD segment/com drivers supporting capacitor split and internal boost methods.

Technical Context

The R5F10RB8AFP#10 implements the 16-bit RL78 CPU core with Harvard architecture, 3-stage pipeline, and 86% of instructions executed in 1–2 clock cycles. It integrates a high-speed on-chip oscillator (24 MHz ±1% over voltage/temperature) and supports multiple clock sources including external crystal (X1/X2) and subsystem clock (XT1/XT2).

Its peripheral set includes UART, two CSI (SPI-compatible) interfaces, I²C, DMA (2 channels), watchdog timer with window function, and safety features compliant with IEC/UL 60730 - including flash CRC, RAM parity, SFR write protection, and illegal memory access detection.

Key Specifications

Pinout & Package

32-pin plastic LQFP (7 × 7 mm, 0.8 mm pitch), 0.8 mm lead pitch, standard JEDEC outline PLQP0032GB-A. Requires 0.47–1 µF capacitor between REGC and VSS.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F10RB8AFP#10, R5F10RBAFP#10 provides double the code flash for complex firmware while maintaining identical power and LCD capabilities, whereas R5F10RBAGFP#10 preserves all electrical specs but extends thermal range to +105°C - enabling drop-in use in harsher environments without layout or software modification.

Availability

R5F10RB8AFP#10 is available at Aetrix Electronics and suitable for smart energy metering, programmable thermostats, and portable medical monitors requiring stable component supply and long-lifecycle support.

Supply support for R5F10RB8AFP#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 specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/L12 product line delivers ultra-low-power MCUs optimized for LCD-based human interface applications, combining integrated display drivers, precision analog, and safety-certified firmware execution in compact packages.

FAQ

What is the maximum operating frequency and performance of the R5F10RB8AFP#10?

The R5F10RB8AFP#10 operates at up to 24 MHz using its high-speed on-chip oscillator, delivering 31 DMIPS. Its 16-bit RL78 core executes 86% of instructions in 1–2 clock cycles, and minimum instruction time is 0.04167 µs at 24 MHz - enabling responsive real-time control in LCD-driven applications.

Does the R5F10RB8AFP#10 support external crystal oscillators?

Yes, the R5F10RB8AFP#10 supports external crystal oscillation via pins P121 (X1) and P122 (X2) for main system clock, and P123 (XT1) and P124 (XT2) for subsystem clock (32.768 kHz). These enable precise timing for RTC, communication baud rates, and metrology functions beyond on-chip oscillator accuracy.

How many LCD segments and commons does the R5F10RB8AFP#10 drive?

The R5F10RB8AFP#10 supports up to 35 segment × 4 common or 39 segment × 4 common LCD configurations. It provides dedicated VL1–VL4 bias rails, COM0–COM3 outputs, and SEG0–SEG32 pins - sufficient for 4-digit numeric displays with status icons and bar graphs in compact 32-pin LQFP form factor.

What safety certifications or built-in features does the R5F10RB8AFP#10 include?

The R5F10RB8AFP#10 includes hardware-level safety features aligned with IEC/UL 60730 Class B: flash memory CRC calculation, RAM parity error detection, SFR write protection, illegal memory access detection, clock frequency monitoring, and ADC self-test - enabling certified functional safety without external supervision circuits.

Can the R5F10RB8AFP#10 operate from a single 1.8 V supply?

Yes, the R5F10RB8AFP#10 operates across 1.6–5.5 V, including 1.8 V. At this voltage, it supports full functionality: 10-bit ADC (with internal 1.45 V reference), LCD driving (capacitor split method), RTC, and 16 MHz max CPU speed - making it suitable for coin-cell or energy-harvesting powered designs.