Renesas R5F100JKAFA#30

Overview

R5F100JKAFA#30 from Renesas is a 52-pin LQFP-0.65mm 32-bit RL78/G13 microcontroller with 256 KB flash, 8 KB data flash, 20 KB RAM, 10-bit ADC (24 channels), and real-time clock - designed for low-power industrial control and sensor interface applications operating from 1.6 V to 5.5 V.

For engineers reviewing the R5F100JKAFA#30 datasheet, R5F100JKAFA#30 pinout, R5F100JKAFA#30 application, or R5F100JKAFA#30 equivalent, key selection criteria include ultra-low power consumption (66 μA/MHz active, 0.57 μA RTC+LVD mode), integrated LIN/UART/SPI/I²C interfaces, and hardware multiplier/divider support for deterministic control loops.

Technical Context

The R5F100JKAFA#30 implements the RL78 CPU core with CISC architecture, 3-stage pipeline, and configurable instruction timing (0.03125 μs @ 32 MHz to 30.5 μs @ 32.768 kHz). It integrates dual-clock domains: high-speed on-chip oscillator (±1.0% accuracy, 1–32 MHz selectable) and dedicated low-speed oscillator for RTC/wdog.

It supports background data flash rewriting (BGO), self-programming with boot swap, and security features including block erase prohibition. Power management includes HALT, STOP, and SNOOZE modes, plus on-chip POR and 14-level LVD with interrupt/reset options.

Key Specifications

Pinout & Package

Package: 52-pin LQFP (10 × 10 mm, 0.65-mm pitch), RoHS-compliant, JEDEC standard footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100JKAFA#30, R5F100JKDFA#30 removes data flash but adds full industrial temp rating, while R5F101JKAFA#30 sacrifices data flash and peripheral count for lower gate count and cost - making both viable alternatives depending on whether data retention or extended temperature operation is the primary constraint.

Availability

R5F100JKAFA#30 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, and energy meter interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for R5F100JKAFA#30 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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The RL78/G13 product line delivers true low-power 32-bit performance for general-purpose embedded applications - balancing energy efficiency, rich peripheral integration, and toolchain maturity for rapid development of cost-sensitive industrial controls.

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F100JKAFA#30?

The R5F100JKAFA#30 operates up to 32 MHz using its high-speed on-chip oscillator. At this frequency, active current consumption is 66 μA per MHz (2.112 mA typical at 32 MHz). In STOP mode with only RTC and LVD enabled, it draws just 0.57 μA - enabling multi-year battery life in always-on sensor applications. The R5F100JKAFA#30 achieves this via optimized logic design and dynamic voltage scaling across its power domains.

Does the R5F100JKAFA#30 support in-system programming and secure firmware updates?

Yes, the R5F100JKAFA#30 supports full in-system programming via its on-chip debug interface. It includes flash shield window functionality to protect critical bootloader regions, boot swap capability for atomic firmware updates, and block erase prohibition to prevent unauthorized reprogramming. These features enable secure, field-upgradable firmware deployment without requiring external programmers - a key requirement for deployed R5F100JKAFA#30-based systems.

How many analog input channels does the R5F100JKAFA#30 ADC support, and what reference options are available?

The R5F100JKAFA#30 integrates a 10-bit successive-approximation ADC with 24 analog input channels. Reference voltage options include external AVREFP/AVREFM pins, internal 1.45 V bandgap reference, and VDD as reference - enabling flexible ratiometric or absolute measurements. The internal temperature sensor is also accessible via dedicated ANI channel, allowing thermal compensation without external components in R5F100JKAFA#30 designs.

What serial communication interfaces are integrated into the R5F100JKAFA#30, and which support LIN bus protocol?

The R5F100JKAFA#30 integrates up to 8 CSI (SPI-compatible), 4 UART/LIN, and 10 I²C/Simplified I²C channels. Among these, the UART peripherals natively support LIN 2.2 protocol features including automatic break detection, sync field generation, and checksum calculation - eliminating the need for external LIN transceivers in body electronics or HVAC subsystems built around the R5F100JKAFA#30.

Is the R5F100JKAFA#30 pin-compatible with other RL78/G13 variants in the same package?

Yes, all RL78/G13 devices in the 52-pin LQFP-0.65mm package (e.g., R5F100JCAFA#30 through R5F100JLAFA#30) share identical pinouts and electrical characteristics. This allows direct substitution within the same memory/peripheral configuration tier - for example, upgrading from 128 KB to 256 KB flash (R5F100JKAFA#30) requires no PCB change, provided the target application fits the larger code space and leverages compatible peripherals.