Renesas R5F100LCGFB#10

Overview

R5F100LCGFB#10 from Renesas is a 64-pin LQFP-64, 512 KB flash, 8 KB data flash, 32 KB RAM RL78/G13 16-bit microcontroller with ultra-low-power operation (66 μA/MHz active, 0.57 μA RTC+LVD), 32 MHz max CPU speed, and integrated peripherals including 16-bit timers, 10-bit ADC (26 channels), UART, I²C, CSI, RTC, and DMA. It targets battery-powered industrial control and sensor interface applications.

For engineers reviewing the R5F100LCGFB#10 datasheet, R5F100LCGFB#10 pinout, R5F100LCGFB#10 application, or R5F100LCGFB#10 equivalent, key selection criteria include its industrial-grade temperature range (–40°C to +105°C), on-chip debug support, self-programmable flash with boot swap, background data flash rewriting, and hardware multiplier/divider for real-time signal processing.

Technical Context

The R5F100LCGFB#10 implements the RL78 CPU core with a 3-stage pipeline CISC architecture, supporting instruction execution times from 0.03125 μs (32 MHz high-speed mode) to 30.5 μs (32.768 kHz subsystem clock). It integrates a high-accuracy ±1.0% on-chip oscillator (1–32 MHz selectable) and supports multiple low-power modes: HALT, STOP, and SNOOZE.

Peripherals include up to 16 channels of 16-bit timer, one 12-bit interval timer, calendar-based RTC with alarm and correction, watchdog timer, 8/10-bit ADC with internal 1.45 V reference and temperature sensor, and three serial interfaces (CSI, UART/LIN, I²C) configurable across up to 10 total channels. DMA supports 4-channel transfers with 2-clock latency between SFR and RAM.

Key Specifications

Pinout & Package

Package: 64-pin LQFP (12 × 12 mm, 0.65-mm pitch), RoHS-compliant, industrial-grade (G) marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F100LCGFB#10, R5F100LGGBG#U0 offers identical functionality in a compact VFBGA package but demands higher-precision assembly, while R5F101LCGFB#10 removes data flash entirely-reducing cost but eliminating BGO, secure parameter storage, and firmware update resilience.

Availability

R5F100LCGFB#10 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, programmable logic controller modules, and factory automation gateways requiring stable component supply, long-term lifecycle support, and guaranteed G-grade temperature compliance.

Supply support for R5F100LCGFB#10 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 IoT markets.

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

FAQ

What is the maximum operating frequency and corresponding power consumption of the R5F100LCGFB#10?

The R5F100LCGFB#10 operates at up to 32 MHz using its high-accuracy on-chip oscillator. At this frequency, active current consumption is 66 μA per MHz, resulting in approximately 2.1 mA total at 32 MHz with typical peripheral activity. In STOP mode with only RTC and LVD enabled, it draws just 0.57 μA-enabling decade-scale battery operation in intermittent-sensing applications. The R5F100LCGFB#10 achieves this via adaptive clock gating and multiple low-power states tightly integrated with the RL78 core.

Does the R5F100LCGFB#10 support in-system programming and secure firmware updates?

Yes, the R5F100LCGFB#10 supports full in-system programming via its on-chip debug interface and built-in flash programming routines. It includes boot swap functionality to enable atomic firmware updates without runtime interruption, and flash shield window protection to prevent unauthorized access to critical code sections. These features are implemented in hardware and require no external programming hardware-making the R5F100LCGFB#10 ideal for remote, field-upgradable devices where service access is limited.

How many serial communication interfaces does the R5F100LCGFB#10 integrate, and what protocols do they support?

The R5F100LCGFB#10 integrates up to 10 serial interface channels across three types: CSI (Renesas' simplified SPI), UART/LIN (with LIN bus physical layer compliance), and I²C/Simplified I²C. Specifically, it supports 2–8 CSI channels, 2–4 UART/LIN channels, and 3–10 I²C channels-configurable per pin assignment. This allows simultaneous operation of multiple protocols-for example, UART for host communication, I²C for sensor reads, and CSI for display or memory interface-all without external transceivers. The R5F100LCGFB#10's flexibility reduces system-level component count and simplifies design.

What is the purpose and specification of the internal temperature sensor in the R5F100LCGFB#10?

The R5F100LCGFB#10 includes an integrated temperature sensor usable only in HS (high-speed main) mode, delivering calibrated readings across the full –40°C to +105°C industrial range. It connects to the 10-bit ADC and uses the internal 1.45 V reference for consistent accuracy independent of supply voltage fluctuations. Typical accuracy is ±3°C over temperature, making it suitable for ambient monitoring, thermal derating, and system health diagnostics-eliminating the need for external thermistors or digital sensors in cost-sensitive designs. The R5F100LCGFB#10 leverages this sensor directly within its ADC calibration routines.

Can the R5F100LCGFB#10 operate reliably at 1.6 V supply, and which peripherals remain functional at that voltage?

Yes, the R5F100LCGFB#10 is fully specified to operate down to 1.6 V across its entire industrial temperature range (–40°C to +105°C). At this minimum voltage, all core functions-including CPU execution, 512 KB flash access, 32 KB RAM, 10-bit ADC (with internal 1.45 V reference), RTC, 16-bit timers, and all serial interfaces (CSI, UART, I²C)-remain fully operational. The on-chip POR and LVD circuits also function correctly, ensuring robust startup and brown-out protection. This wide voltage range makes the R5F100LCGFB#10 compatible with primary lithium cells and energy-harvesting sources without regulation overhead.