Renesas R5F100LKAFB#V0

Overview

R5F100LKAFB#V0 from Renesas is a 64-pin LFQFP-0.5mm-pitch 32-bit RL78/G13 microcontroller with 384 KB flash, 8 KB data flash, 24 KB RAM, and integrated peripherals including 16-bit timers, 10-bit ADC (26 channels), UART/LIN, I²C, CSI, RTC, and ultra-low-power operation (66 μA/MHz active, 0.57 μA in RTC+LVD mode). It targets battery-powered industrial sensors and smart metering systems requiring long runtime and robust peripheral integration.

For engineers reviewing the R5F100LKAFB#V0 datasheet, R5F100LKAFB#V0 pinout, R5F100LKAFB#V0 application, or R5F100LKAFB#V0 equivalent, key selection criteria include its 64-pin LFQFP package, 384 KB code flash with self-programming and flash shield window, 10-bit ADC with internal temperature sensor and 1.45 V reference, real-time clock with calendar/alarm, and support for STOP/HALT/SNOOZE low-power modes across –40°C to +105°C.

Technical Context

The R5F100LKAFB#V0 implements the RL78 CPU core-a CISC architecture with 3-stage pipeline-delivering 41 DMIPS at 32 MHz while supporting variable instruction execution time (0.03125 μs at 32 MHz to 30.5 μs at 32.768 kHz). Its memory subsystem includes 384 KB on-chip code flash (1 KB block size), 8 KB data flash with background operation (BGO) and 1M rewrite cycles, and 24 KB RAM.

Peripherals are tightly coupled to power management: dual DMA controller (4 channels), 16-bit timer array (16 channels), 12-bit interval timer, watchdog timer with dedicated low-speed oscillator, and serial interfaces including up to 10-channel simplified I²C, 4-channel UART/LIN, and 8-channel CSI-all configurable under HALT/STOP modes. The device operates from 1.6–5.5 V and supports voltage detector (LVD) interrupt/reset across 14 levels.

Key Specifications

Pinout & Package

Package: 64-pin LFQFP (10 × 10 mm, 0.5-mm pitch), RoHS-compliant, tray packaging (#V0).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LKAFB#V0, R5F101LKAFB#V0 removes data flash to reduce cost and die size while retaining full peripheral functionality, whereas R5F100LLAFB#V0 offers identical memory/performance in a mechanically distinct 0.65-mm-pitch LQFP package-requiring PCB redesign but enabling use of widely available LQFP assembly infrastructure.

Availability

R5F100LKAFB#V0 is available at Aetrix Electronics and suitable for smart energy metering, industrial sensor nodes, home appliance control, building automation panels, and battery-powered IoT edge devices requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R5F100LKAFB#V0 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 enterprise applications.

The RL78/G13 family delivers true low-power performance for general-purpose embedded systems, emphasizing energy efficiency, integrated analog peripherals, and robust development tooling-including E2 studio, CS+ IDE, and Renesas Flash Programmer.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100LKAFB#V0?

The R5F100LKAFB#V0 operates at up to 32 MHz and delivers 41 DMIPS performance. This is achieved using the RL78 CPU core's 3-stage pipeline and high-speed on-chip oscillator. The device maintains this performance across its full 1.6–5.5 V supply range and –40°C to +105°C temperature grade, making R5F100LKAFB#V0 suitable for timing-critical industrial control applications where consistent throughput matters.

Does the R5F100LKAFB#V0 support in-system programming and secure firmware updates?

Yes, the R5F100LKAFB#V0 supports full in-system programming via its on-chip debug interface and UART bootloader. It includes boot swap functionality for safe dual-image updates and flash shield window protection to prevent unauthorized access to critical firmware sections. These features enable field-upgradable R5F100LKAFB#V0 deployments in remote or safety-critical equipment without requiring physical reprogramming.

How many analog input channels does the R5F100LKAFB#V0 ADC support, and what reference options are available?

The R5F100LKAFB#V0 integrates a 10-bit successive-approximation ADC with 26 analog input channels. It supports external reference inputs (AVREFP/AVREFM pins) and an internal 1.45 V reference voltage. The internal reference is factory-trimmed and usable across the full operating voltage and temperature range, enabling accurate sensor measurements without external precision references-critical for compact R5F100LKAFB#V0-based designs.

What low-power modes are available on the R5F100LKAFB#V0, and what is the lowest achievable current draw?

The R5F100LKAFB#V0 offers HALT, STOP, and SNOOZE low-power modes. In STOP mode with only the real-time clock (RTC) and low-voltage detector (LVD) active, it draws just 0.57 μA. This ultra-low quiescent current enables multi-year battery operation in always-on sensor nodes. Wake-up sources include external interrupts, RTC alarm, and serial interface activity-ensuring responsive R5F100LKAFB#V0 behavior without compromising energy efficiency.

Is the R5F100LKAFB#V0 pin-compatible with other RL78/G13 variants in the same package?

Yes, all RL78/G13 devices in the 64-pin LFQFP-0.5mm package-including R5F100LKAFB#V0, R5F100LJAFB#V0, and R5F100LLAFB#V0-share identical pinouts and electrical characteristics. This allows direct substitution within the same footprint for memory or feature scaling (e.g., upgrading from 256 KB to 384 KB flash), provided software is reconfigured for the target variant's memory map and peripheral enable settings. R5F100LKAFB#V0 maintains full hardware compatibility across this family subset.