Renesas R5F100GCAFB#V0

Overview

R5F100GCAFB#V0 from Renesas is a 48-pin LFQFP-packaged 16-bit RL78/G13 microcontroller with 128 KB flash, 8 KB data flash, 12 KB RAM, and industrial-grade operation up to +105°C. It delivers 41 DMIPS at 32 MHz, consumes only 66 μA/MHz active and 0.57 μA in RTC+LVD mode, and integrates UART, I²C, SPI, 16-bit timers, 10-bit ADC (26 channels), and real-time clock - deployed in smart metering, industrial sensors, and battery-powered HMI.

For engineers reviewing the R5F100GCAFB#V0 datasheet, R5F100GCAFB#V0 pinout, R5F100GCAFB#V0 application, or R5F100GCAFB#V0 equivalent, key selection criteria include its 48-pin LFQFP-0.5mm pitch package, 128 KB code flash with self-programming and boot swap, 10-bit ADC with internal temperature sensor, ultra-low-power STOP/HALT/SNOOZE modes, and support for LIN-bus via UART.

Technical Context

The R5F100GCAFB#V0 implements the RL78 CPU core with CISC architecture and 3-stage pipeline, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz ultra-low-speed mode). Its memory subsystem includes 128 KB on-chip flash with 1 KB block erase granularity, 8 KB data flash with background operation (BGO), and 12 KB RAM - enabling secure firmware updates and concurrent program execution during data flash rewriting.

Peripherals are tightly integrated for deterministic real-time control: dual DMA controller (4 channels), 16-bit timer array (16 channels), 12-bit interval timer, calendar-capable RTC with alarm/correction, watchdog timer with dedicated low-speed oscillator, and mixed-signal resources including 10-bit ADC (26 inputs), internal 1.45 V reference, and temperature sensor - all operating across 1.6–5.5 V supply and −40°C to +105°C ambient.

Key Specifications

Pinout & Package

Package: 48-pin LFQFP (7 mm × 7 mm, 0.5 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 R5F100GCAFB#V0, R5F100GDAFB#V0 adds 4 KB RAM for enhanced multitasking headroom, while R5F101GCAFB#V0 removes data flash to reduce cost and simplify qualification - both retain identical timing, power, and peripheral compatibility for drop-in evaluation.

Availability

R5F100GCAFB#V0 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, and home appliance control requiring stable component supply, long-term industrial temperature support, and verified low-power performance.

Supply support for R5F100GCAFB#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, and power solutions for automotive, industrial, and IoT markets.

The RL78/G13 family is engineered for ultra-low-power general-purpose embedded control - balancing performance, energy efficiency, and integration for cost-sensitive industrial and consumer devices operating across extended temperature ranges.

FAQ

What is the maximum operating frequency and corresponding DMIPS rating of the R5F100GCAFB#V0?

The R5F100GCAFB#V0 operates at up to 32 MHz using its high-speed on-chip oscillator and delivers 41 DMIPS (Dhrystone MIPS) at that frequency. This performance level is achieved with the RL78 CPU core's 3-stage pipeline and optimized instruction set, enabling real-time control tasks in resource-constrained applications without external clock sources.

Does the R5F100GCAFB#V0 support LIN bus communication, and how is it implemented?

Yes, the R5F100GCAFB#V0 supports LIN bus communication through its UART peripheral, which includes LIN-specific features such as automatic sync field detection, checksum calculation (classic and enhanced), and break signal generation. The UART operates in LIN mode with configurable baud rates and is validated for compliance with LIN 2.2A standards - no external transceiver is required for basic node functionality.

What are the memory protection mechanisms available on the R5F100GCAFB#V0?

The R5F100GCAFB#V0 provides multiple memory protection layers: flash block erase/write prohibition for security, flash shield window to restrict access to designated code regions, and boot swap functionality to enable safe firmware updates without runtime interruption. These features collectively prevent unauthorized code execution, reverse engineering, and corruption during over-the-air or field updates.

How does the R5F100GCAFB#V0 achieve ultra-low-power operation in STOP mode?

In STOP mode, the R5F100GCAFB#V0 disables the main system clock while retaining operation of the real-time clock (RTC), low-voltage detector (LVD), and RAM contents - drawing just 0.57 μA typical. This is enabled by the dedicated low-speed on-chip oscillator and optimized power gating, allowing timekeeping and wake-up event detection without external components or battery drain.

Is the R5F100GCAFB#V0 pin-compatible with other RL78/G13 variants in the same package?

Yes, the R5F100GCAFB#V0 is fully pin-compatible with all other 48-pin LFQFP RL78/G13 variants sharing the FB suffix (e.g., R5F100GDAFB#V0, R5F100GEAFB#V0), including identical pin functions, electrical characteristics, and thermal behavior. This allows direct substitution within the same memory/peripheral configuration group without PCB redesign.