Renesas R5F100LFAFA#X0

Overview

R5F100LFAFA#X0 from Renesas is a 64-pin LQFP-0.65mm, 512 KB flash, 32 KB RAM RL78/G13 16-bit microcontroller with integrated data flash (8 KB), real-time clock, 10-bit ADC (26 channels), and ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD). It targets battery-powered industrial sensors and smart metering interfaces requiring deterministic timing and secure firmware updates.

For engineers reviewing the R5F100LFAFA#X0 datasheet, R5F100LFAFA#X0 pinout, R5F100LFAFA#X0 application, or R5F100LFAFA#X0 equivalent, key selection criteria include its 512 KB code flash with boot swap, 8 KB data flash supporting background rewriting (1M cycles), 26-channel 10-bit ADC with internal temperature sensor, and support for STOP/HALT/SNOOZE low-power modes across –40°C to +85°C.

Technical Context

The R5F100LFAFA#X0 implements the RL78 CPU core with 3-stage pipeline CISC architecture, 1 MB address space, and configurable instruction timing (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates a high-accuracy ±1.0% on-chip oscillator (1–32 MHz selectable) and dedicated low-speed oscillator for watchdog and RTC.

Peripherals include up to 16× 16-bit timers, 1× 12-bit interval timer, 1× calendar RTC with alarm/correction, 2–4 channel DMA, UART/LIN ×4, CSI ×8, I²C ×10, and 16–120 GPIO with N-ch open-drain capability and key interrupt support - all operating from a single 1.6–5.5 V supply.

Key Specifications

Pinout & Package

64-pin LQFP package (12 × 12 mm, 0.65 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 R5F100LFAFA#X0, R5F100LGAFA#X0 reduces flash/RAM by 75% while retaining identical peripherals and low-power features, whereas R5F101LFAFA#X0 removes data flash entirely - trading embedded nonvolatile parameter storage for simplified memory architecture.

Availability

R5F100LFAFA#X0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for R5F100LFAFA#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 family is designed for ultra-low-power general-purpose embedded control - balancing performance, energy efficiency, and peripheral richness for cost-sensitive industrial and consumer applications.

FAQ

What is the maximum operating frequency and corresponding performance of the R5F100LFAFA#X0?

The R5F100LFAFA#X0 operates at up to 32 MHz, delivering 41 DMIPS of processing performance. Its RL78 CPU core uses a 3-stage pipeline and supports variable instruction timing - from 0.03125 μs at full speed to 30.5 μs at 32.768 kHz - enabling precise trade-offs between throughput and power in mixed-mode applications. This makes the R5F100LFAFA#X0 suitable for both responsive control loops and ultra-low-power sensing intervals.

Does the R5F100LFAFA#X0 include integrated data flash, and what are its endurance and voltage requirements?

Yes, the R5F100LFAFA#X0 includes 8 KB of on-chip data flash memory rated for 1,000,000 write/erase cycles (typical). It supports background operation (BGO), allowing program execution from code flash while rewriting data flash. Voltage requirements for rewriting are VDD = 1.8 V to 5.5 V - matching the device's full operating range - eliminating need for auxiliary voltage rails during field updates.

What low-power modes does the R5F100LFAFA#X0 support, and what is its lowest active current draw?

The R5F100LFAFA#X0 supports HALT, STOP, and SNOOZE low-power modes. Its lowest active current is 66 μA per MHz at 32 MHz operation. In STOP mode with only RTC and LVD active, it draws just 0.57 μA - enabling multi-year battery life in intermittently active sensor nodes. All modes retain RAM content and support wake-up via external interrupt, RTC alarm, or peripheral event.

How many analog input channels and what resolution does the ADC in the R5F100LFAFA#X0 provide?

The R5F100LFAFA#X0 integrates a 10-bit successive-approximation ADC with up to 26 analog input channels. It includes an internal 1.45 V reference voltage and a calibrated temperature sensor - both accessible without external components. The ADC operates across the full 1.6–5.5 V supply range, supporting ratiometric measurements and direct thermal monitoring in industrial environments.

Is the R5F100LFAFA#X0 pin-compatible with other RL78/G13 variants in the same package?

Yes, the R5F100LFAFA#X0 is pin-compatible with all 64-pin LQFP (0.65 mm pitch) RL78/G13 variants, including R5F100LGAFA#X0 and R5F101LFAFA#X0. Pin functions, power domains, and peripheral mappings are consistent across the family - enabling hardware reuse and firmware scalability. However, memory size, data flash presence, and temperature grade differ, so software must verify feature availability at runtime.