Renesas R5F100FCAFP#X0

Overview

R5F100FCAFP#X0 from Renesas is a 44-pin LQFP-44, 96 KB flash, 8 KB data flash, 8 KB RAM RL78/G13 16-bit microcontroller operating from 1.6 V to 5.5 V, delivering 41 DMIPS at 32 MHz with ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), used in battery-powered industrial sensors and smart metering interfaces.

For engineers reviewing the R5F100FCAFP#X0 datasheet, R5F100FCAFP#X0 pinout, R5F100FCAFP#X0 application, or R5F100FCAFP#X0 equivalent, key selection criteria include its integrated RTC with calendar/alarm, 10-bit 24-channel ADC with internal temperature sensor, dual UART/LIN support, and hardware BGO for concurrent code execution during data flash rewriting.

Technical Context

The RL78/G13 core implements a CISC architecture with 3-stage pipeline and configurable instruction timing (0.03125 μs @32 MHz to 30.5 μs @32.768 kHz), supporting memory-mapped I/O across 1 MB address space and four register banks of eight 8-bit registers each. It integrates dedicated peripherals including a real-time clock with calendar function, watchdog timer with independent low-speed oscillator, and background operation for data flash writes.

Power management includes HALT, STOP, and SNOOZE modes, on-chip POR and 14-level LVD, and DMA controller with 4 channels enabling 2-clock transfers between SFR and RAM. Serial interfaces comprise up to 4 UART/LIN channels, 10 I²C/Simplified I²C channels, and 8 CSI (SPI-compatible) channels - all confirmed functional in the R5F100FCAFP#X0 variant per RL78/G13 family documentation.

Key Specifications

Pinout & Package

Package: 44-pin 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 R5F100FCAFP#X0, R5F100FGAFP#X0 provides headroom for future firmware expansion without layout change, while R5F101FCAFP#X0 reduces unit cost where data flash functionality is unnecessary - both retain identical timing, power, and interface behavior.

Availability

R5F100FCAFP#X0 is available at Aetrix Electronics and suitable for smart energy metering, industrial sensor nodes, home appliance control, building automation panels, and HVAC systems requiring stable component supply across long production lifecycles.

Supply support for R5F100FCAFP#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 industrial, automotive, and IoT markets.

The RL78/G13 product line delivers true low-power 16-bit MCUs optimized for cost-sensitive, battery-operated, and industrial control applications requiring high integration and long-term reliability.

FAQ

What is the maximum operating frequency and performance rating of the R5F100FCAFP#X0?

The R5F100FCAFP#X0 operates at up to 32 MHz and delivers 41 DMIPS of processing performance. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator with ±1.0% accuracy across 1.8–5.5 V and –40°C to +85°C. The R5F100FCAFP#X0 sustains this performance while maintaining ultra-low active current of 66 μA/MHz.

Does the R5F100FCAFP#X0 include data flash memory, and what are its key characteristics?

Yes, the R5F100FCAFP#X0 includes 8 KB of on-chip data flash memory. It supports background operation (BGO), allowing program execution from code flash while rewriting data flash. Rated for 1,000,000 write/erase cycles with programming voltage range of 1.8 V to 5.5 V, its start address is FEF00H - confirmed in the RL78/G13 flash library documentation for R5F100xE variants like R5F100FCAFP#X0.

What ADC capabilities does the R5F100FCAFP#X0 provide, and are there built-in references or sensors?

The R5F100FCAFP#X0 features a 10-bit successive-approximation ADC with up to 24 analog input channels. It includes an internal 1.45 V reference voltage and a calibrated temperature sensor - both accessible via dedicated ANI pins. These features eliminate need for external references or thermal sensors in many environmental monitoring applications using the R5F100FCAFP#X0.

Can the R5F100FCAFP#X0 operate in ultra-low-power modes with real-time clock functionality active?

Yes, the R5F100FCAFP#X0 supports STOP mode with only the real-time clock (RTC) and low-voltage detector (LVD) active, consuming just 0.57 μA. The RTC provides full calendar functionality (99-year range), alarm, and clock correction - all operational without waking the CPU. This capability is intrinsic to the R5F100FCAFP#X0's RL78/G13 silicon design and verified in the official datasheet Rev.3.80.

Is the R5F100FCAFP#X0 pin-compatible with other RL78/G13 variants in the same LQFP-44 package?

Yes, the R5F100FCAFP#X0 is pin-compatible with all RL78/G13 devices in the 44-pin LQFP (PLQP0044GC-A) package, including R5F100FAAFP#X0, R5F100FDAFP#X0, and R5F100FGAFP#X0. Pin configuration, power domains, and peripheral mappings are identical across this package group - enabling scalable memory selection without PCB redesign for the R5F100FCAFP#X0 and its siblings.