Renesas R5F100MKAFA#X0

Overview

R5F100MKAFA#X0 from Renesas is a 80-pin LQFP-0.65mm ultra-low-power 16-bit RL78/G13 microcontroller with 384 KB flash, 8 KB data flash, 24 KB RAM, 1.6–5.5 V operation, and integrated RTC/LVD-designed for battery-powered industrial control and sensor nodes requiring long runtime and robust timing.

For engineers reviewing the R5F100MKAFA#X0 datasheet, R5F100MKAFA#X0 pinout, R5F100MKAFA#X0 application, or R5F100MKAFA#X0 equivalent, key selection criteria include its 384 KB code flash with self-programming, 24 KB RAM for real-time firmware execution, 64-channel A/D converter with internal temperature sensor, and support for SNOOZE mode with sub-1 μA retention current in STOP mode.

Technical Context

The R5F100MKAFA#X0 implements the RL78 CPU core with 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz) to 30.5 μs (32.768 kHz), and features a unified 1 MB address space with four register banks. It integrates dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy at 32 MHz) and dedicated low-speed subsystem clock for RTC and watchdog.

Its peripheral set includes up to 16× 16-bit timers, 3× I²C/Simplified I²C channels, 4× UART/LIN interfaces, 2–4-channel DMA, and a 12-bit interval timer with calendar-based RTC-enabling precise timekeeping and deterministic interrupt latency for real-time embedded control loops.

Key Specifications

Pinout & Package

Package: 80-pin LQFP (14 × 14 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 R5F100MLAFA#X0 and R5F101MKAFA#X0, the R5F100MKAFA#X0 provides optimal balance of on-chip data retention capability, memory headroom, and ultra-low-power operation-making it ideal for field-deployed devices requiring autonomous firmware updates and long-term calibration storage without external components.

Availability

R5F100MKAFA#X0 is available at Aetrix Electronics and suitable for smart energy meters, industrial sensor nodes, home appliance control, medical wearables, and battery-powered IoT edge devices requiring stable component supply across multi-year production cycles.

Supply support for R5F100MKAFA#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 Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets.

The RL78/G13 product line delivers true low-power performance for general-purpose microcontroller applications, emphasizing energy efficiency, integrated analog peripherals, and simplified development through scalable memory and pin-compatible variants.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100MKAFA#X0?

The R5F100MKAFA#X0 operates at up to 32 MHz using its high-speed on-chip oscillator and delivers 41 DMIPS of processing performance. This benchmark reflects its RL78 CPU core's 3-stage pipeline efficiency and is measured under standard conditions with cache disabled. The R5F100MKAFA#X0 maintains this performance across its full 1.6–5.5 V supply range and −40°C to +85°C ambient temperature.

Does the R5F100MKAFA#X0 support background data flash rewriting while executing application code?

Yes, the R5F100MKAFA#X0 supports Background Operation (BGO) for data flash memory. This allows the CPU to execute instructions from program memory while simultaneously rewriting data flash sectors-a critical capability for firmware-over-the-air updates and secure parameter storage. The R5F100MKAFA#X0 guarantees 1,000,000 rewrite cycles with VDD = 1.8–5.5 V, and uses RAM starting at address FAF00H for flash library operations.

What are the low-power modes supported by the R5F100MKAFA#X0, and what is the minimum current consumption achievable?

The R5F100MKAFA#X0 supports HALT, STOP, and SNOOZE modes. In STOP mode with only RTC and LVD active, it achieves 0.57 μA typical current consumption. HALT mode draws 66 μA/MHz during active operation, and SNOOZE mode enables selective peripheral wake-up with sub-μA retention. All modes retain RAM contents and support fast wake-up (< 4 μs from HALT), making the R5F100MKAFA#X0 suitable for battery-critical applications.

Can the R5F100MKAFA#X0 interface directly with 1.8 V or 2.5 V peripheral ICs without external level shifters?

Yes, the R5F100MKAFA#X0 supports different-potential interface operation. Its I/O ports can be configured to recognize 1.8 V, 2.5 V, or 3.0 V logic thresholds-enabling direct connection to low-voltage sensors, displays, or communication ICs. This capability is implemented via internal voltage detection circuitry and eliminates the need for discrete level-shifting components in mixed-voltage systems using the R5F100MKAFA#X0.

What is the A/D converter resolution, channel count, and special analog features included in the R5F100MKAFA#X0?

The R5F100MKAFA#X0 integrates a 10-bit successive-approximation A/D converter with up to 26 input channels. It includes an internal 1.45 V reference voltage and a calibrated temperature sensor usable in HS (high-speed main) mode. These features allow accurate voltage, current, and thermal measurements without external references or sensors-reducing BOM cost and PCB area in designs based on the R5F100MKAFA#X0.